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DEI Document - shares	3 Months Ended
DEI Document - shares	Dec. 31, 2012	Feb. 04, 2013
Document and Entity Information [Abstract]
Entity Registrant Name	INTL FCSTONE INC.
Trading Symbol	INTL
Entity Central Index Key	0000913760
Current Fiscal Year End Date	--09-30
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Dec. 31, 2012
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		19,092,344
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Condensed Consolidated Balance Sheets Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
ASSETS
Cash and cash equivalents	$ 294.7	$ 236.3
Cash, securities and other assets segregated under federal and other regulations (including $41.4 and $72.8 at fair value at December 31, 2012 and September 30, 2012, respectively)	381.7	357.5
Deposits and receivables from:
Exchange-clearing organizations (including $1,430.2 and $1,510.0 at fair value at December 31, 2012 and September 30, 2012, respectively)	1,478.7	1,619.8
Broker-dealers, clearing organizations and counterparties (including $4.8 and $(0.7) at fair value at December 31, 2012 and September 30, 2012, respectively)	126.0	127.4
Receivables from customers, net	143.7	68.9
Notes receivable, net	90.3	104.0
Income taxes receivable	7.7	11.9
Financial Instruments, Owned, at Fair Value	151.1	171.7
Physical commodities inventory	133.9	131.6
Deferred income taxes	20.4	21.9
Property and equipment, net	18.9	18.9
Goodwill and intangible assets, net	57.2	54.7
Other assets	35.3	34.3
Total assets	2,939.6	2,958.9
Liabilities:
Accounts payable and other accrued liabilities (including $14.8 at fair value at December 31, 2012 and September 30, 2012)	109.4	127.0
Payables to:
Customers	2,064.2	2,072.3
Broker-dealers, clearing organizations and counterparties	7.5	39.4
Lenders under loans and overdrafts	241.4	218.2
Income taxes payable	4.3	5.5
Financial instruments sold, not yet purchased, at fair value	187.5	175.4
Deferred income taxes	0.0	2.0
Total liabilities	2,614.3	2,639.8
Stockholders' Equity:
Preferred stock, $.01 par value. Authorized 1,000,000 shares; no shares issued or outstanding	0.0	0.0
Common stock, $.01 par value. Authorized 30,000,000 shares; 19,407,303 issued and 19,068,221 outstanding at December 31, 2012 and 19,214,219 issued and 18,984,951 outstanding at September 30, 2012	0.2	0.2
Common stock in treasury, at cost - 339,082 shares at December 31, 2012 and 229,064 shares at September 30, 2012, respectively	(6.1)	(4.1)
Additional paid-in capital	214.5	213.2
Retained earnings	125.3	112.0
Accumulated other comprehensive loss	(8.6)	(2.2)
Total stockholders' equity	325.3	319.1
Total liabilities and equity	$ 2,939.6	$ 2,958.9

Condensed Consolidated Balance Sheets Condensed Consolidated Balance Sheet Parentheticals - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Balance Sheet Parentheticals [Abstract]
Securities and other assets segregated, fair value	$ 41.4	$ 72.8
Dep and rec -exch clear org - fair value	1,430.2	1,510.0
Dep and rec -b/d - fair value	4.8	(0.7)
Accounts pay and other accrued - fair value	$ 17.9	$ 14.8
Preferred stock - par value	$ 0.01	$ 0.01
Preferred stock - authorized	1,000,000	1,000,000
Preferred stock - issued	0	0
Preferred stock - outstanding	0	0
Common stock - par value	$ 0.01	$ 0.01
Common stock - authorized	30,000,000	30,000,000
Common stock - issued	19,407,303	19,214,219
Common stock - outstanding	19,068,221	18,984,951
Treasury stock - shares	339,082	229,064

Condensed Consolidated Income Statements Statement - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Revenues:
Sales of physical commodities	$ 12,587.9	$ 17,175.9
Trading gains	79.9	73.4
Commission and clearing fees	40.0	32.0
Consulting and management fees	8.3	6.2
Interest income	3.3	2.7
Other income	0.1	0.2
Total revenues	12,719.5	17,290.4
Cost of sales of physical commodities	12,593.8	17,194.1
Operating revenues	125.7	96.3
Interest expense	3.5	2.1
Net revenues	122.2	94.2
Non-interest expenses:
Compensation and benefits	46.7	45.8
Clearing and related expenses	25.0	22.7
Introducing broker commissions	8.4	5.8
Communication and data services	5.3	4.6
Occupancy and equipment rental	2.9	2.8
Professional fees	3.7	2.7
Depreciation and amortization	1.8	1.5
Bad debts and impairments	0.4	0.1
Other	9.2	8.9
Total non-interest expenses	103.4	94.9
Income from continuing operations, before tax	18.8	(0.7)
Income tax expense	5.5	(0.2)
Net income	13.3	(0.5)
Add: Net loss attributable to noncontrolling interests	0.0	0.1
Net income attributable to INTL FCStone Inc. common stockholders	$ 13.3	$ (0.4)
Basic earnings per share:
Net income attributable to INTL FCStone Inc. common stockholders	$ 0.70	$ (0.02)
Diluted earnings per share:
Net income attributable to INTL FCStone Inc. common stockholders	$ 0.68	$ (0.02)
Weighted-average number of common shares outstanding:
Basic	18,266,338	18,163,489
Diluted	18,778,675	18,163,489

Condensed Consolidated Cash Flows Statements Statement - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 13.3	$ (0.5)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	1.8	1.5
Provision for bad debts and impairments	0.4	0.1
Deferred income taxes	(0.4)	(0.6)
Amortization of debt issuance costs and debt discount	0.3	0.4
Amortization of stock-based compensation expense	1.6	1.0
Gain (Loss) on Sale of Other Assets	(9.2)	0.0
Changes in operating assets and liabilities, net:
Cash, securities and other assets segregated under federal and other regulations	(24.2)	(354.7)
Deposits and receivables from exchange-clearing organizations	141.1	473.6
Deposits and receivables from broker-dealers, clearing organizations, and counterparties	1.4	11.9
Receivable from customers, net	(75.2)	25.7
Notes receivable from customers, net	13.7	6.0
Income taxes receivable	4.2	(0.3)
Financial instruments owned and securities purchased under agreements to resell, at fair value	11.6	76.6
Physical commodities inventory	(2.3)	47.0
Other assets	(2.0)	4.2
Accounts payable and other accrued liabilities	(20.0)	(7.3)
Payable to customers	(8.0)	(99.3)
Payable to broker-dealers, clearing organizations and counterparties	(31.8)	11.8
Income taxes payable	0.8	0.4
Financial instruments sold, not yet purchased, at fair value	12.1	(164.4)
Net cash provided by (used in) operating activities	29.2	33.1
Cash flows from investing activities:
Deconsolidation of affiliates	0.0	0.4
Cash paid for other acquisitions, net	0.0	(1.0)
Sale of exchange memberships and common stock	10.1	0.0
Purchase of property and equipment	(1.2)	(3.2)
Net cash used in investing activities	8.9	(3.8)
Cash flows from financing activities:
Net change in payable to lenders under loans and overdrafts	23.2	38.5
Payments related to earn-outs on acquisitions	(0.3)	(0.3)
Exercise of stock options	0.0	0.3
Share repurchase	(2.0)	0.0
Income tax benefit on stock options and awards	(0.3)	0.0
Net cash provided by financing activities	20.6	38.5
Effect of exchange rates on cash and cash equivalents	(0.3)	(0.1)
Net increase (decrease) in cash and cash equivalents	58.4	67.7
Cash and cash equivalents at beginning of period	236.3	220.6
Cash and cash equivalents at end of period	294.7	288.3
Supplemental disclosure of cash flow information:
Cash paid for interest	2.5	2.1
Income taxes paid, net of cash refunds	1.3	1.4
Supplemental disclosure of non-cash investing and financing activities:
Identified intangible assets and goodwill on acquisitions	3.1	1.2
Additional consideration payable related to acquisitions	$ 3.4	$ 0.9

Condensed Consolidated Statement of Stockholders’ Equity Statement - 3 months ended Dec. 31, 2012 - USD ($) $ in Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Balances at beginning of period at Sep. 30, 2012	$ 319.1	$ 0.2	$ (4.1)	$ 213.2	$ 112.0	$ (2.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13.3
Other comprehensive loss	(6.4)					(6.4)
Proceeds from Stock Options Excercised (including income tax benefit)	(0.1)			(0.1)
Stock-based Compensation	1.4			1.4
Repurchase of stock	(2.0)		(2.0)
Balances at end of period at Dec. 31, 2012	$ 325.3	$ 0.2	$ (6.1)	$ 214.5	$ 125.3	$ (8.6)

- Definition

This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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+ Details

- Definition

Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

+ References + Details

Condensed Consolidated Statement of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Condensed Consolidated Statement of Other Comprehensive Income (Loss) [Abstract]
Net income	$ 13.3	$ (0.5)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(0.3)	(0.1)
Pension liabilities adjustment	0.4	0.1
Net unrealized loss on available-for-sale securities	(0.2)	(0.1)
Reclassification adjustment for gains included in net income	(6.3)	0.0
Other comprehensive loss	(6.4)	(0.1)
Comprehensive income (loss)	$ 6.9	$ (0.6)

- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References + Details

- Definition

Net of tax amount of the income statement impact of the reclassification adjustment for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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+ Details

- Definition

Net of tax amount of unrealized holding gain (loss) before reclassification adjustments and transfers on available-for-sale securities.

+ References

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+ Details

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

+ Details

Basis of Presentation and Consolidation and Recently Issued Accounting Standards	3 Months Ended
	Dec. 31, 2012
Basis of Presentation and Consolidation and Recently Issued Accounting Standards [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Basis of Presentation and Consolidation and Recently Issued Accounting Standards INTL FCStone Inc., a Delaware corporation, and its consolidated subsidiaries (collectively “INTL” or “the Company”), form a financial services group focused on domestic and select international markets. The Company’s services include comprehensive risk management advisory services for commercial customers; execution of listed futures and options-on-futures contracts on all major commodity exchanges; structured over-the-counter (“OTC”) products in a wide range of commodities; physical trading and hedging of precious and base metals and select other commodities; trading of more than 130 foreign currencies; market-making in international equities; debt origination and asset management. The Company provides these services to a diverse group of more than 20,000 customers located throughout the world, including producers, processors and end-users of nearly all widely-traded physical commodities to manage their risks and enhance margins; to commercial counterparties who are end-users of the firm’s products and services; to governmental and non-governmental organizations; and to commercial banks, brokers, institutional investors and major investment banks. Basis of Presentation and Consolidation The accompanying condensed consolidated balance sheet as of September 30, 2012, which has been derived from audited financial statements, and the unaudited interim condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Certain information and note disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") have been condensed or omitted pursuant to those rules and regulations. The Company believes that the disclosures made are adequate to make the information presented not misleading. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the condensed consolidated financial statements for the interim periods presented have been reflected as required by Rule 10-01 of Regulation S-X. Operating results for interim periods are not necessarily indicative of the results that may be expected for the full year. It is suggested that these interim condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and related notes contained in the Company’s Form 10-K for the fiscal year ended September 30, 2012 filed with the SEC. These condensed consolidated financial statements include the accounts of INTL FCStone Inc. and all other entities in which the Company has a controlling financial interest. All material intercompany transactions and balances have been eliminated in consolidation. The Company's fiscal year end is September 30, and the fiscal quarters end on December 31, March 31, June 30 and September 30. Unless otherwise stated, all dates refer to fiscal years and fiscal interim periods. The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. The most significant of these estimates and assumptions relate to fair value measurements for financial instruments and investments, revenue recognition, the provision for potential losses from bad debts, valuation of inventories, valuation of goodwill and intangible assets, incomes taxes and contingencies. Although these and other estimates and assumptions are based on the best available information, actual results could be materially different from these estimates. Recent Accounting Pronouncements In June 2011, the Financial Accounting Standards Board ("FASB") issued new guidance on the presentation of comprehensive income. This guidance eliminates the current option to report comprehensive income and its components in the statement of changes in equity. Under this guidance, an entity can elect to present items of net income and comprehensive income in one continuous statement or in two separate, but consecutive, statements. In addition, the guidance requires entities to show the effects of items reclassified from accumulated other comprehensive loss to net income on the face of the financial statements. This guidance is effective for fiscal years beginning after December 15, 2011 and interim and annual periods thereafter. Early adoption is permitted, but full retrospective application is required. This guidance was effective in the Company's first quarter of fiscal year 2013. In December 2011, the FASB issued guidance that deferred the portion of the original guidance that required a company to separately present within net income reclassification adjustments of items out of accumulated other comprehensive loss. The deferral is intended to be temporary until the FASB has time to reconsider these changes. The other provisions of this guidance became effective as originally planned by the FASB. The Company adopted this guidance in the first quarter of fiscal year 2013, and the Company elected the two statement approach. The application of this guidance relates to presentation only and did not have a significant impact on the Company's condensed consolidated financial statements. On December 16, 2011, the FASB issued new guidance on the disclosures about offsetting assets and liabilities. While the FASB retained the existing offsetting models under U.S. GAAP, the new standard requires disclosures to allow investors to better compare and understand significant quantitative differences in financial statements prepared under U.S. GAAP. The new standard is effective for annual periods beginning on or after January 1, 2013, and interim periods within those annual periods. Retrospective application is required. This guidance is effective for the Company's fiscal year beginning October 1, 2013. The Company expects to adopt this guidance starting with the first quarter of fiscal year 2014. The adoption of this guidance is expected to change some of the Company's disclosures within the notes to its condensed consolidated financial statements. In July 2012, the FASB issued final guidance on indefinite-lived intangible assets impairment testing. Under the guidance, entities testing indefinite-lived intangibles for impairment have the option of first performing a qualitative assessment to determine whether it is more likely than not that an indefinite-lived intangible asset is impaired. If a company determines that it is more likely than not that the fair value of such an asset exceeds its carrying amount, it would not need to calculate the fair value of the asset in that year. However, if a company concludes otherwise, it must calculate the fair value of the asset, compare that value with its carrying amount and record an impairment charge, if any. The guidance does not revise the requirement to test indefinite-lived intangible assets annually for impairment. In addition, the guidance does not amend the requirement to test indefinite-lived intangible assets for impairment between annual tests if events or circumstances warrant, however, it does revise the examples of events and circumstances that an entity should consider. The guidance is effective for annual and interim impairment tests performed for fiscal years beginning after September 15, 2012. Early adoption is permitted. The Company is currently evaluating the impact of this guidance, however, it is expected that the adoption of this guidance will not have a material impact on the Company's condensed consolidated financial statements.

Earnings per Share

3 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Earnings per Share

The Company presents basic and diluted earnings per share ("EPS") using the two-class method which requires all outstanding unvested share-based payment awards that contain rights to non-forfeitable dividends and therefore participate in undistributed earnings with common stockholders be included in computing earnings per share. Under the two-class method, net earnings are reduced by the amount of dividends declared in the period for each class of common stock and participating security. The remaining undistributed earnings are then allocated to common stock and participating securities, based on their respective rights to receive dividends. Restricted stock awards granted to certain employees and directors and shares held in trust for the Provident Group acquisition contain non-forfeitable rights to dividends at the same rate as common stock, and are considered participating securities.

Basic EPS has been computed by dividing net income by the weighted-average number of common shares outstanding. The following is a reconciliation of the numerator and denominator of the diluted net income (loss) per share computations for the periods presented below.



	Three Months Ended December 31,
(in millions, except share amounts)	2012			2011
Numerator:
Income (loss) from operations attributable to INTL FCStone Inc. stockholders	$	13.3		$	(0.4	)
Less: Allocation to participating securities	(0.5		)	—
Income (loss) from operations allocated to common stockholders	$	12.8		$	(0.4	)
Diluted net income (loss)	$	13.3		$	(0.4	)
Less: Allocation to participating securities	(0.5		)	—
Diluted net income (loss) allocated to common stockholders	$	12.8		$	(0.4	)
Denominator:
Weighted average number of:
Common shares outstanding	18,266,338			18,163,489
Dilutive potential common shares outstanding:
Share-based awards	512,337			—
Diluted weighted-average shares	18,778,675			18,163,489

The dilutive effect of share-based awards is reflected in diluted net income (loss) per share by application of the treasury stock method, which includes consideration of unamortized share-based compensation expense required under the Compensation – Stock Compensation Topic of the ASC.

Options to purchase 1,490,547 and 1,284,102 shares of common stock for the three months ended December 31, 2012 and 2011, respectively, were excluded from the calculation of diluted earnings per share because they would have been anti-dilutive.

Assets and Liabilities, at Fair Value

3 Months Ended

Dec. 31, 2012

Assets and Liabilities, at Fair Value [Abstract]

Fair Value Disclosures [Text Block]

Assets and Liabilities, at Fair Value

The Company’s financial and nonfinancial assets and liabilities reported at fair value are included within the following captions on the condensed consolidated balance sheets:


•	Cash and cash equivalents


•	Cash, securities and other assets segregated under federal and other regulations


•	Deposits and receivables from exchange-clearing organizations, broker-dealers, clearing organizations and counterparties


•	Financial instruments owned


•	Accounts payable and other accrued liabilities


•	Payables to customers


•	Payables to broker-dealers, clearing organizations and counterparties


•	Financial instruments sold, not yet purchased

Fair Value Hierarchy

The majority of financial assets and liabilities on the consolidated balance sheets are reported at fair value. Cash is reported at the balance held at financial institutions. Cash equivalents includes money market funds, which are valued at period-end at the net asset value provided by the fund’s administrator, and certificates of deposit, which are stated at cost plus accrued interest, which approximates fair value. Cash, securities and other assets segregated under federal and other regulations include the value of cash collateral as well as the value of other pledged investments, primarily U.S. Treasury bills and obligations issued by government sponsored entities and commodities warehouse receipts. Deposits with and receivables from exchange-clearing organizations and broker-dealers, clearing organizations and counterparties and payables to customers and broker-dealers, clearing organizations and counterparties include the value of cash collateral as well as the value of money market funds and other pledged investments, primarily U.S. Treasury bills and obligations issued by government sponsored entities and mortgage-backed securities. These balances also include the fair value of exchange-traded futures and options-on-futures and exchange-cleared swaps and options determined by prices on the applicable exchange. Financial instruments owned and sold, not yet purchased include the value of U.S. and foreign government obligations, corporate debt securities, derivative financial instruments, commodities and mutual funds. The fair value of exchange common stock is determined by quoted market prices, and the fair value of exchange memberships is determined by recent sale transactions. Payable to lenders carry variable rates of interest and thus approximate fair value.

The fair value estimates presented in the financial statements are based on pertinent information available to management as of December 31, 2012 and September 30, 2012. Although management is not aware of any factors that would significantly affect the estimated fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since that date and current estimates of fair value may differ significantly from the amounts presented in the financial statements.

Cash equivalents, securities, commodities warehouse receipts, derivative financial instruments, commodities leases, exchange common stock and contingent liabilities are carried at fair value, on a recurring basis, and are classified and disclosed into three levels within the fair value hierarchy. The Company did not have any fair value adjustments for assets or liabilities measured at fair value on a non-recurring basis during the three months ended December 31, 2012. The three levels of the fair value hierarchy under the Fair Value Measurements and Disclosures Topic of the ASC are:

Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;

Level 2 - Quoted prices for identical or similar assets or liabilities in markets that are less active, that is, markets in which there are few transactions for the asset or liability that are observable for substantially the full term; and

Level 3 - Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity).

The following tables set forth the Company’s financial and nonfinancial assets and liabilities accounted for at fair value, on a recurring basis, as of December 31, 2012 and September 30, 2012 by level within the fair value hierarchy.



	December 31, 2012
(in millions)	Level 1		Level 2		Level 3		Netting and Collateral (1)			Total
Assets:
Money market funds	$	0.1	$	—	$	—	$	—		$	0.1
Certificate of deposits	6.4		—		—		—			6.4
Unrestricted cash equivalents	6.5		—		—		—			6.5
Commodities warehouse receipts	18.4		—		—		—			18.4
U.S. government obligations	—		23.0		—		—			23.0
Securities and other assets segregated under federal and other regulations	18.4		23.0		—		—			41.4
Money market funds	731.8		—		—		—			731.8
U.S. government obligations	—		701.2		—		—			701.2
Mortgage-backed securities	—		6.5		—		—			6.5
Derivatives	1,950.8		—		—		(1,960.1		)	(9.3		)
Deposits and receivables from exchange-clearing organizations	2,682.6		707.7		—		(1,960.1		)	1,430.2
Deposits and receivables from broker-dealers, clearing organizations and counterparties - derivatives	0.8		—		—		4.0			4.8
Common and preferred stock and American Depositary Receipts ("ADRs")	27.9		17.3		0.9		—			46.1
Exchangeable foreign ordinary equities and ADRs	18.2		—		—		—			18.2
Corporate and municipal bonds	—		—		3.6		—			3.6
U.S. government obligations	—		0.3		—		—			0.3
Foreign government obligations	11.2		—		—		—			11.2
Derivatives	192.9		604.3		—		(746.9		)	50.3
Commodities leases	—		45.1		—		(34.8		)	10.3
Commodities warehouse receipts	5.3		—		—		—			5.3
Exchange firm common stock	3.0		0.4		—		—			3.4
Mutual funds and other	2.4		—		—		—			2.4
Financial instruments owned	260.9		667.4		4.5		(781.7		)	151.1
Total assets at fair value	$	2,969.2	$	1,398.1	$	4.5	$	(2,737.8	)	$	1,634.0
Liabilities:
Accounts payable and other accrued liabilities - contingent liabilities	$	—	$	—	$	17.9	$	—		$	17.9
Payables to exchange-clearing organizations, broker-dealers and counterparties - derivatives	1,702.5		—		—		(1,702.5		)	—
Common and preferred stock and ADRs	40.3		14.9		—		—			55.2
Exchangeable foreign ordinary equities and ADRs	6.2		—		—		—			6.2
Derivatives	199.4		591.6		—		(754.2		)	36.8
Commodities leases	—		308.4		—		(219.1		)	89.3
Financial instruments sold, not yet purchased	245.9		914.9		—		(973.3		)	187.5
Total liabilities at fair value	$	1,948.4	$	914.9	$	17.9	$	(2,675.8	)	$	205.4


(1)	Represents cash collateral and the impact of netting across the levels of the fair value hierarchy. Netting among positions classified within the same level are included in that level.



	September 30, 2012
(in millions)	Level 1		Level 2		Level 3		Netting and Collateral (1)			Total
Assets:
Money market funds	$	0.1	$	—	$	—	$	—		$	0.1
Certificate of deposits	10.4		—		—		—			10.4
Unrestricted cash equivalents	10.5		—		—		—			10.5
Commodities warehouse receipts	22.3		—		—		—			22.3
U.S. government obligations	—		50.5		—		—			50.5
Securities and other assets segregated under federal and other regulations	22.3		50.5		—		—			72.8
Money market funds	335.1		—		—		—			335.1
U.S. government obligations	—		1,318.3		—		—			1,318.3
Mortgage-backed securities	—		7.0		—		—			7.0
Derivatives	3,344.3		—		—		(3,494.7		)	(150.4		)
Deposits and receivables from exchange-clearing organizations	3,679.4		1,325.3		—		(3,494.7		)	1,510.0
Deposits and receivables from broker-dealers, clearing organizations and counterparties - derivatives	0.7		5.0		—		(6.4		)	(0.7		)
Common and preferred stock and American Depositary Receipts ("ADRs")	17.8		5.6		0.9		—			24.3
Exchangeable foreign ordinary equities and ADRs	10.0		—		—		—			10.0
Corporate and municipal bonds	0.3		0.6		3.6		—			4.5
U.S. government obligations	—		0.3		—		—			0.3
Foreign government obligations	14.8		—		—		—			14.8
Derivatives	315.6		785.3		—		(1,047.0		)	53.9
Commodities leases	—		135.2		—		(93.1		)	42.1
Commodities warehouse receipts	7.5		—		—		—			7.5
Exchange firm common stock	3.4		9.0		—		—			12.4
Mutual funds and other	1.9		—		—		—			1.9
Financial instruments owned	371.3		936.0		4.5		(1,140.1		)	171.7
Total assets at fair value	$	4,084.2	$	2,316.8	$	4.5	$	(4,641.2	)	$	1,764.3
Liabilities:
Accounts payable and other accrued liabilities - contingent liabilities	$	—	$	—	$	14.8	$	—		$	14.8
Payables to exchange-clearing organizations, broker-dealers and counterparties - derivatives	3,562.3		—		—		(3,562.3		)	—
Common and preferred stock and ADRs	16.4		5.9		—		—			22.3
Exchangeable foreign ordinary equities and ADRs	5.7		—		—		—			5.7
Derivatives	338.1		775.2		—		(1,068.7		)	44.6
Commodities leases	—		220.0		—		(117.2		)	102.8
Financial instruments sold, not yet purchased	360.2		1,001.1		—		(1,185.9		)	175.4
Total liabilities at fair value	$	3,922.5	$	1,001.1	$	14.8	$	(4,748.2	)	$	190.2


(1)	Represents cash collateral and the impact of netting across the levels of the fair value hierarchy. Netting among positions classified within the same level are included in that level.

Realized and unrealized gains and losses are included within ‘trading gains’ in the condensed consolidated income statements.

Information on Level 3 Financial Assets and Liabilities

The Company’s financial assets at fair value classified within level 3 of the fair value hierarchy as of December 31, 2012 and September 30, 2012 are summarized below:



(in millions)	December 31, 2012			September 30, 2012
Total level 3 assets	$	4.5		$	4.5
Level 3 assets for which the Company bears economic exposure	$	4.5		$	4.5
Total assets	$	2,939.6		$	2,958.9
Total financial assets at fair value	$	1,634.0		$	1,764.3
Total level 3 assets as a percentage of total assets	0.2		%	0.2		%
Level 3 assets for which the Company bears economic exposure as a percentage of total assets	0.2		%	0.2		%
Total level 3 assets as a percentage of total financial assets at fair value	0.3		%	0.3		%

The following tables set forth a summary of changes in the fair value of the Company’s level 3 financial assets and liabilities during the three months ended December 31, 2012 and 2011, including a summary of unrealized gains (losses) during the respective periods on the Company’s level 3 financial assets and liabilities still held as of December 31, 2012.



	Level 3 Financial Assets and Financial Liabilities For the Three Months Ended December 31, 2012
(in millions)	Balances at beginning of period		Realized gains (losses) during period		Unrealized gains (losses) during period		Purchases/ issuances		Settlements			Transfers in or (out) of Level 3		Balances at end of period
Assets:
Common stock and ADRs	$	0.9	$	—	$	—	$	—	$	—		$	—	$	0.9
Corporate and municipal bonds	3.6		—		—		—		—			—		3.6
	$	4.5	$	—	$	—	$	—	$	—		$	—	$	4.5
Liabilities:
Contingent liabilities	$	14.8	$	—	$	0.3	$	3.1	$	(0.3	)	$	—	$	17.9



	Level 3 Financial Assets and Financial Liabilities For the Three Months Ended December 31, 2011
(in millions)	Balances at beginning of period		Realized gains (losses) during period		Unrealized gains (losses) during period			Settlements			Transfers in or (out) of Level 3		Balances at end of period
Assets:
Common stock and ADRs	$	1.1	$	—	$	—		$	—		$	—	$	1.1
Corporate and municipal bonds	3.6		—		(0.1		)	—			—		3.5
Mutual funds and other	0.4		—		—			—			—		0.4
	$	5.1	$	—	$	(0.1	)	$	—		$	—	$	5.0
Liabilities:
Contingent liabilities	$	22.3	$	—	$	0.9		$	(0.3	)	$	—	$	22.9

In accordance with the Fair Value Measurements and Disclosures Topic of the ASC, the Company has estimated the fair value of debentures, for the single asset owning company of Suriwongse Hotel located in Chiang Mai, Thailand, on a recurring basis each period. The Company has classified its investment in the hotel within level 3 of the fair value hierarchy because the fair value is determined using significant unobservable inputs, which include projected cash flows. These cash flows are discounted employing present value techniques. The Company estimates the fair value of its investment in these debentures by using a management-developed forecast, which is based on the income approach. The Company continues to evaluate the fair value of the debentures. There were no significant changes in the fair value of the debentures during the three months ended December 31, 2012 and 2011.

The Company is required to make additional future cash payments based on certain financial performance measures of its acquired businesses. The Company is required to remeasure the fair value of the cash earnout arrangements on a recurring basis in accordance with the guidance in the Business Combinations Topic of the ASC. The Company has classified its net liabilities for the contingent earnout arrangements within level 3 of the fair value hierarchy because the fair value is determined using significant unobservable inputs, which include projected cash flows. The estimated fair value of the contingent purchase consideration is based upon management-developed forecasts, a level 3 input in the fair value hierarchy. These cash flows are discounted employing present value techniques in arriving at the acquisition-date fair value. The discount rate was developed using market participant company data and there have been no significant changes in the discount rate environment. From the dates of acquisition to December 31, 2012, certain acquisitions have had changes in the estimates of undiscounted cash flows, based on actual performances fluctuating from estimates. During the three months ended December 31, 2012 and 2011, the fair value of the contingent consideration increased $0.3 million and $0.9 million, respectively, with the corresponding amount classified as 'other expense' within the condensed consolidated income statements.

The Company reports transfers in and out of levels 1, 2 and 3, as applicable, using the fair value of the securities as of the beginning of the reporting period in which the transfer occurred.

The Company did not have any transfers between level 1 and level 2 fair value measurements for the three months ended December 31, 2012 and 2011.

The Company has recorded unrealized gains, net of income tax expense, related to U.S. government obligations and corporate bonds classified as available-for-sale securities in other comprehensive income ("OCI") as of December 31, 2012. The following tables summarize the amortized cost basis, the aggregate fair value and gross unrealized holding gains and losses of the Company’s investment securities classified as available-for-sale as of December 31, 2012 and September 30, 2012:



December 31, 2012
Amounts included in deposits with and receivables from exchange-clearing organizations:
	Amortized Cost		Unrealized Holding ⁽¹⁾				Estimated Fair Value
(in millions)	Amortized Cost		Gains		(Losses)		Estimated Fair Value
U.S. government obligations	$	654.1	$	—	$	—	$	654.1
Mortgage-backed securities	6.4		0.1		—		6.5
	$	660.5	$	0.1	$	—	$	660.6


(1)	Unrealized gain/loss on U.S. government obligations as of December 31, 2012, is less than 0.1 million.



September 30, 2012
Amounts included in deposits with and receivables from exchange-clearing organizations:
	Amortized Cost		Unrealized Holding ⁽¹⁾				Estimated Fair Value
(in millions)	Amortized Cost		Gains		(Losses)		Estimated Fair Value
U.S. government obligations	$	1,298.9	$	—	$	—	$	1,298.9
Mortgage-backed securities	6.8		0.1		—		6.9
	$	1,305.7	$	0.1	$	—	$	1,305.8


(1)	Unrealized gain/loss on U.S. government obligations as of September 30, 2012, is less than 0.1 million.

As of December 31, 2012 and September 30, 2012, investments in debt securities classified as available-for-sale ("AFS") mature as follows:



December 31, 2012
	Due in				Estimated Fair Value
(in millions)	Less than 1 year		1 year or more		Estimated Fair Value
U.S. government obligations	$	654.1	$	—	$	654.1
Mortgage-backed securities	—		6.5		6.5
	$	654.1	$	6.5	$	660.6



September 30, 2012
	Due in				Estimated Fair Value
(in millions)	Less than 1 year		1 year or more		Estimated Fair Value
U.S. government obligations	$	1,298.9	$	—	$	1,298.9
Mortgage-backed securities	—		6.9		6.9
	$	1,298.9	$	6.9	$	1,305.8

There were no sales of AFS securities during the three months ended December 31, 2012 and 2011, and as a result, no realized gains or losses were recorded for the three months ended December 31, 2012 and 2011.

For the purposes of the maturity schedule, mortgage-backed securities, which are not due at a single maturity date, have been allocated over maturity groupings based on the expected maturity of the underlying collateral. Mortgage-backed securities may mature earlier than their stated contractual maturities because of accelerated principal repayments of the underlying loans.

The Company has also classified equity investments in exchange firms' common stock not pledged for clearing purposes as available-for-sale. The investments are recorded at fair value, with unrealized gains and losses recorded, net of taxes, as a component of OCI until realized. As of December 31, 2012, the cost and fair value of all the equity investments in exchange firms was $4.0 million and $3.4 million, respectively.

In June 2012, the board of LME Holdings Limited, the parent company of The London Metal Exchange (LME), entered into a framework agreement regarding the terms of a recommended cash offer for the entire issued and outstanding ordinary share capital of LME Holdings. In July 2012, the shareholders of LME Holdings voted to approve the sale of LME Holdings to the Hong Kong Exchanges & Clearing Limited. In December 2012, the Company received proceeds of $8.6 million from the sale of its shares in the LME. The shares of the LME were previously held by the Company as available-for-sale and the unrealized gain for those shares was reflected in OCI. For the three months ended December 31, 2012, the Company reclassified the unrealized gain remaining in accumulated OCI of approximately $6.3 million, net of income tax expense of $2.0 million, into the current period earnings.

The Company recorded unrealized losses of $0.4 million, net of income tax benefit of $0.2 million in OCI related to the remaining equity investments in exchange firms as of December 31, 2012. The Company monitors the fair value of exchange common stock on a periodic basis, and does not consider any current unrealized losses to be anything other than a temporary impairment.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13504-108611

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15B
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44A, 44B
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 17-22, 27, 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15A
-Subparagraph a-d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15C, 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32, 33, 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 3, 10, 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk

3 Months Ended

Dec. 31, 2012

Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk [Abstract]

Derivative Instruments and Hedging Activities Disclosure [Text Block]

Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk

The Company is party to certain financial instruments with off-balance sheet risk in the normal course of its business. The Company has sold financial instruments that it does not currently own and will therefore be obliged to purchase such financial instruments at a future date. The Company has recorded these obligations in the condensed consolidated financial statements as of December 31, 2012 at the fair values of the related financial instruments. The Company will incur losses if the fair value of the underlying financial instruments increases subsequent to December 31, 2012. The total of $187.5 million as of December 31, 2012 includes $36.8 million for derivative contracts, which represents a liability to the Company based on their fair values as of December 31, 2012.

Derivatives

The Company utilizes derivative products in its trading capacity as a dealer in order to satisfy client needs and mitigate risk. The Company manages risks from both derivatives and non-derivative cash instruments on a consolidated basis. The risks of derivatives should not be viewed in isolation, but in aggregate with the Company’s other trading activities. The majority of the Company’s derivative positions are included in the consolidated balance sheets within ‘financial instruments owned, at fair value’, ‘deposits and receivables from exchange-clearing organizations’ and ‘financial instruments sold, not yet purchased, at fair value’.

The Company continues to employ an interest rate risk management strategy, implemented in April 2010, that uses derivative financial instruments in the form of interest rate swaps to manage a portion of the aggregate interest rate position. The Company’s objective is to invest the majority of customer segregated deposits in high quality, short-term investments and swap the resulting variable interest earnings into the medium-term interest stream, by using a strip of interest rate swaps that mature every quarter, in order to achieve the two year moving average of the two year swap rate. The risk mitigation of these interest rate swaps is not within the documented hedging designation requirements of the Derivatives and Hedging Topic of the ASC, and as a result they are recorded at fair value, with changes in the fair value of the financial instruments recorded within 'trading gains' in the condensed consolidated income statements. As of December 31, 2012, approximately $625 million in notional principal of interest rate swaps were outstanding with a weighted-average life of 4 months.

Listed below are the fair values of the Company's derivative assets and liabilities as of December 31, 2012 and September 30, 2012. Assets represent net unrealized gains and liabilities represent net unrealized losses.



	December 31, 2012						September 30, 2012
(in millions)	Assets ⁽¹⁾			Liabilities ⁽¹⁾			Assets ⁽¹⁾			Liabilities ⁽¹⁾
Derivative contracts not accounted for as hedges:
Exchange-traded commodity derivatives	$	1,919.2		$	1,665.3		$	3,325.6		$	3,565.3
OTC commodity derivatives	454.7			472.1			823.6			841.4
Exchange-traded foreign exchange derivatives	46.5			40.6			63.0			47.7
OTC foreign exchange derivatives ⁽²⁾	309.2			289.9			215.4			196.6
Exchange-traded interest rate derivatives	1.2			4.4			0.9			2.6
OTC interest rate derivatives	1.1			—			1.6			—
Equity index derivatives	16.9			21.2			20.8			22.0
Gross fair value of derivative contracts	2,748.8			2,493.5			4,450.9			4,675.6
Impact of netting and collateral	(2,703.0		)	(2,456.7		)	(4,548.1		)	(4,631.0		)
Total fair value included in ‘Deposits and receivables from exchange-clearing organizations’	$	(9.3	)				$	(150.4	)
Total fair value included in 'Deposits and receivables from broker-dealers, clearing organizations and counterparties'	$	4.8					$	(0.7	)
Total fair value included in ‘Financial instruments owned, at fair value’	$	50.3					$	53.9
Fair value included in ‘Financial instruments sold, not yet purchased, at fair value’				$	36.8					$	44.6


(1)	As of December 31, 2012 and September 30, 2012, the Company’s derivative contract volume for open positions was approximately 3.1 million and 4.1 million contracts, respectively.


(2)	In accordance with agreements with counterparties, the Company is allowed to periodically take advances against its open trade fair value. There were no advances against open trade fair value outstanding as of December 31, 2012 and September 30, 2012.

The Company’s derivative contracts are principally held in its Commodities and Risk Management Services ("C&RM") segment. The Company assists its C&RM segment customers in protecting the value of their future production by entering into option or forward agreements with them on an OTC basis. The Company also provides its C&RM segment customers with sophisticated option products, including combinations of buying and selling puts and calls. The Company mitigates its risk by offsetting the customer's transaction simultaneously with one of the Company's trading counterparties or with a similar but not identical position on the exchange. The risk mitigation of these offsetting trades is not within the documented hedging designation requirements of the Derivatives and Hedging Topic of the ASC. These derivative contracts are traded along with cash transactions because of the integrated nature of the markets for these products. The Company manages the risks associated with derivatives on an aggregate basis along with the risks associated with its proprietary trading and market-making activities in cash instruments as part of its firm-wide risk management policies. In particular, the risks related to derivative positions may be partially offset by inventory, unrealized gains in inventory or cash collateral paid or received.

The following table sets forth the Company's gains (losses) related to derivative financial instruments for the three months ended December 31, 2012 and 2011, in accordance with the Derivatives and Hedging Topic of the ASC. The gains (losses) set forth below are included within ‘trading gains’ in the condensed consolidated income statements.



	Three Months Ended December 31,
(in millions)	2012		2011
Commodities	$	30.6	$	34.1
Foreign exchange	2.6		4.7
Interest rate	0.1		(1.0		)
Net gains (losses) from derivative contracts	$	33.3	$	37.8

Credit Risk

In the normal course of business, the Company purchases and sells financial instruments, commodities and foreign currencies as either principal or agent on behalf of its customers. If either the customer or counterparty fails to perform, the Company may be required to discharge the obligations of the nonperforming party. In such circumstances, the Company may sustain a loss if the fair value of the financial instrument or foreign currency is different from the contract value of the transaction.

The majority of the Company’s transactions and, consequently, the concentration of its credit exposure are with commodity exchanges, customers, broker-dealers and other financial institutions. These activities primarily involve collateralized and uncollateralized arrangements and may result in credit exposure in the event that a counterparty fails to meet its contractual obligations. The Company’s exposure to credit risk can be directly impacted by volatile financial markets, which may impair the ability of counterparties to satisfy their contractual obligations. The Company seeks to control its credit risk through a variety of reporting and control procedures, including establishing credit limits based upon a review of the counterparties’ financial condition and credit ratings. The Company monitors collateral levels on a daily basis for compliance with regulatory and internal guidelines and requests changes in collateral levels as appropriate.

The Company is a party to financial instruments in the normal course of its business through customer and proprietary trading accounts in exchange-traded and OTC derivative instruments. These instruments are primarily the execution of orders for commodity futures, options on futures and forward foreign currency contracts on behalf of its customers, substantially all of which are transacted on a margin basis. Such transactions may expose the Company to significant credit risk in the event margin requirements are not sufficient to fully cover losses which customers may incur. The Company controls the risks associated with these transactions by requiring customers to maintain margin deposits in compliance with individual exchange regulations and internal guidelines. The Company monitors required margin levels daily and, therefore, may require customers to deposit additional collateral or reduce positions when necessary. The Company also establishes credit limits for customers, which are monitored daily. The Company evaluates each customer’s creditworthiness on a case by case basis. Clearing, financing, and settlement activities may require the Company to maintain funds with or pledge securities as collateral with other financial institutions. Generally, these exposures to both customers and exchanges are subject to master netting, or customer agreements, which reduce the exposure to the Company by permitting receivables and payables with such customers to be offset in the event of a customer default. Management believes that the margin deposits held as of December 31, 2012 and September 30, 2012 were adequate to minimize the risk of material loss that could be created by positions held at that time. Additionally, the Company monitors collateral fair value on a daily basis and adjusts collateral levels in the event of excess market exposure. Generally, these exposures to both customers and counterparties are subject to master netting or customer agreements which reduce the exposure to the Company.

Derivative financial instruments involve varying degrees of off-balance sheet market risk whereby changes in the fair values of underlying financial instruments may result in changes in the fair value of the financial instruments in excess of the amounts reflected in the condensed consolidated balance sheets. Exposure to market risk is influenced by a number of factors, including the relationships between the financial instruments and the Company’s positions, as well as the volatility and liquidity in the markets in which the financial instruments are traded. The principal risk components of financial instruments include, among other things, interest rate volatility, the duration of the underlying instruments and changes in foreign exchange rates. The Company attempts to manage its exposure to market risk through various techniques. Aggregate market limits have been established and market risk measures are routinely monitored against these limits.

- Definition

The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6441202&loc=d3e80720-113993

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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624258-113959

Reference 11: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Paragraph 4J
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708773-113959

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 16: http://www.xbrl.org/2003/role/presentationRef
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Reference 20: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 21: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 45
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 22: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Receivables from customers and notes receivable, net	3 Months Ended
Receivables from customers and notes receivable, net	Dec. 31, 2012
Receivables from customers and notes receivable, net [Abstract]
Financing Receivables [Text Block]	Receivables From Customers and Notes Receivable, net Receivables from customers, net and notes receivable, net include an allowance for bad debts, which reflects the Company's best estimate of probable losses inherent in the receivables from customers and notes receivable. The Company provides for an allowance for doubtful accounts based on a specific-identification basis. The Company continually reviews its allowance for bad debts. The allowance for doubtful accounts related to receivables from customers was $1.3 million and $0.9 million as of December 31, 2012 and September 30, 2012, respectively. The allowance for doubtful accounts related to notes receivable was $0.1 million as of December 31, 2012 and September 30, 2012, respectively. The Company originates short-term notes receivable from customers with the outstanding balances being insured 90% to 98% by a third party, including accrued interest. The total balance outstanding under insured notes receivable was $16.1 million and $10.2 million as of December 31, 2012 and September 30, 2012, respectively. See discussion of notes receivable related to commodity repurchase agreements in Note 10.

Physical Commodities Inventory

3 Months Ended

Dec. 31, 2012

Physical Commodities Inventory [Abstract]

Inventory Disclosure [Text Block]

Physical Commodities Inventory

Physical commodities inventories are stated at the lower of cost or market ("LCM") using the weighted-average price and first-in first-out cost method. Cost includes finished commodity or raw material and processing costs related to the purchase and processing of inventories. Commodities in process include commodities in the process of being recycled. As of December 31, 2012 and September 30, 2012, $131.6 million and $129.1 million, respectively, of physical commodities inventory served as collateral under one of the Company’s credit facilities, as detailed further in Note 9. The carrying values of the Company’s inventory as of December 31, 2012 and September 30, 2012 are shown below.



(in millions)	December 31, 2012		September 30, 2012
Commodities in process	$	0.1	$	13.6
Finished commodities	133.8		118.0
Physical commodities inventory	$	133.9	$	131.6

As a result of declining market prices for some commodities, the Company has recorded LCM adjustments for physical commodities inventory of $1.0 million and $0.4 million as of December 31, 2012 and September 30, 2012, respectively. The adjustments are included within 'cost of sales of physical commodities' in the condensed consolidated income statements.

Goodwill

3 Months Ended

Dec. 31, 2012

Goodwill [Abstract]

Goodwill Disclosure [Text Block]

Goodwill

The carrying value of goodwill by segment is as follows:



(in millions)	December 31, 2012		September 30, 2012
Commodity and Risk Management Services	$	32.0	$	32.0
Foreign Exchange	6.3		6.3
Securities	5.3		5.3
Goodwill	$	43.6	$	43.6

Intangible Assets

3 Months Ended

Dec. 31, 2012

Intangible Assets [Abstract]

Intangible Assets Disclosure [Text Block]

Intangible Assets

The gross and net carrying values of intangible assets as of the balance sheet dates, by major intangible asset class are as follows:



	December 31, 2012							September 30, 2012
(in millions)	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Intangible assets subject to amortization
Noncompete agreement	$	3.7	$	(3.3	)	$	0.4	$	3.7	$	(3.0	)	$	0.7
Trade name	0.7		(0.6		)	0.1		0.7		(0.5		)	0.2
Software programs/platforms	2.2		(1.1		)	1.1		2.2		(1.0		)	1.2
Customer base	12.7		(1.9		)	10.8		9.6		(1.8		)	7.8
	19.3		(6.9		)	12.4		16.2		(6.3		)	9.9
Intangible assets not subject to amortization
Trade name	1.2		—			1.2		1.2		—			1.2
Total intangible assets	$	20.5	$	(6.9	)	$	13.6	$	17.4	$	(6.3	)	$	11.1

Amortization expense related to intangible assets was $0.6 million for the three months ended December 31, 2012 and 2011.

As of December 31, 2012, the estimated future amortization expense was as follows:



(in millions)
Fiscal 2013 (remaining nine months)	$	2.1
Fiscal 2014	1.7
Fiscal 2015	1.4
Fiscal 2016	1.0
Fiscal 2017	1.0
Fiscal 2018 and thereafter	5.2
	$	12.4

Other Expenses

3 Months Ended

Dec. 31, 2012

Other Expenses [Abstract]

Other Expenses [Text Block]

Other Expenses

Other expenses for the three months ended December 31, 2012 and 2011 are comprised of the following:



	Three Months Ended December 31,
(in millions)	2012		2011
Business development	$	3.0	$	3.2
Contingent consideration, net⁽¹⁾	0.7		1.3
Insurance	0.5		0.4
Advertising, meetings and conferences	0.4		0.6
Non-trading hardware and software maintenance and software licensing	0.6		0.6
Office supplies and printing	0.3		0.3
Other non-income taxes	1.1		0.7
Other	2.6		1.8
	$	9.2	$	8.9

(1)

In the three month period ended December 31, 2012 and 2011, contingent consideration includes remeasurement of contingent liabilities related to business combinations accounted for in accordance with the provisions of the Business Combinations Topic of the ASC (see Note 3) and additional purchase price, based on achieving specific conditions and earnings targets, relating to FCStone, LLC's previous acquisition of Globecot, Inc. ("Globecot"). The Globecot acquisition was recorded in accordance with SFAS No. 141, Business Combinations ("SFAS 141"). As a result of the Company's merger with FCStone Group, Inc. ("FCStone") on September 30, 2009, this contingent purchase price amount was considered a pre-acquisition contingency, which was not reasonably estimable during the merger allocation period following the FCStone transaction. In accordance with SFAS 141, adjustments to pre-acquisition contingencies, made after the end of the allocation period, are included in earnings in the current period.

Credit Facilities

3 Months Ended

Dec. 31, 2012

Credit Facilities [Abstract]

Debt Disclosure [Text Block]

Credit Facilities

As of December 31, 2012, the Company had four committed credit facilities under which the Company may borrow up to $385 million, subject to certain conditions. The amounts outstanding under these credit facilities are short term borrowings and carry variable rates of interest, thus approximating fair value.

A summary of the Company’s credit facilities in place as of December 31, 2012 is as follows:

•

A three-year syndicated committed loan facility established on October 29, 2010 and amended on May 22, 2012 to increase the amount under which the Company is entitled to borrow up to $95 million, subject to certain conditions. The loan proceeds are used to finance working capital needs of the Company and certain subsidiaries. The line of credit is secured by a pledge of shares held in certain of the Company’s subsidiaries.

•

A revolving syndicated committed loan facility established on September 22, 2010 and amended on January 29, 2013, to extend the expiration date until April 30, 2013, under which the Company’s subsidiary, INTL Commodities, Inc. ("INTL Commodities") is entitled to borrow up to $140 million, subject to certain conditions. The loan proceeds are used to finance the activities of INTL Commodities and are secured by its assets. The facility is guaranteed by the Company.

•

An unsecured syndicated committed line of credit, established on June 21, 2010 and renewed by amendment on April 12, 2012, under which the Company's subsidiary, FCStone, LLC, may borrow up to $75 million. This line of credit is intended to provide short term funding of margin to commodity exchanges as necessary. This line of credit is subject to annual review, and the continued availability of this line of credit is subject to FCStone, LLC’s financial condition and operating results continuing to be satisfactory as set forth in the agreement. The facility is guaranteed by the Company.

•

A syndicated committed borrowing facility established on August 10, 2012, and amended on September 14, 2012, under which the Company’s subsidiary, FCStone Merchant Services, LLC ("FCStone Merchants"), is entitled to borrow up to $75 million, subject to certain conditions. The loan proceeds are used to finance traditional commodity financing arrangements or the purchase of eligible commodities from sellers who have agreed to sell and later repurchase such commodities from FCStone Merchants, and are secured by its assets. The facility is guaranteed by the Company.

Credit facilities and outstanding borrowings as of December 31, 2012 and September 30, 2012 were as follows:



(in millions)					Amounts Outstanding
Borrower	Security	Renewal / Expiration Date	Total Commitment		December 31, 2012		September 30, 2012
INTL FCStone Inc.	Certain pledged shares	October 1, 2013	$	95.0	$	78.0	$	48.0
INTL Commodities	Certain commodities assets	April 30, 2013	140.0		107.0		107.0
FCStone, LLC	None	April 11, 2013	75.0		—		20.0
FCStone Merchants	Certain commodities assets	May 31, 2013	75.0		56.4		43.2
			$	385.0	$	241.4	$	218.2

All of the Company’s committed credit facilities are scheduled to expire during fiscal 2013 or shortly thereafter. The Company is currently in discussions with current and potential lenders to renew, extend or rearrange these facilities. While there is no guarantee that the Company will be successful in renewing, extending or rearranging these agreements as they expire, based on the Company's liquidity position and capital structure, the Company believes it will be able to do so. At this time, the Company is unable to determine the duration, applicable interest rates or other costs associated with the renewal or replacement of these facilities.

The Company’s facility agreements contain certain financial covenants relating to financial measures on a consolidated basis, as well as on a certain stand-alone subsidiary basis, including minimum net worth, minimum working capital, minimum regulatory capital, minimum net unencumbered liquid assets, minimum equity, minimum interest coverage and leverage ratios and maximum net loss. Failure to comply with any such covenants could result in the debt becoming payable on demand. As of December 31, 2012, the Company was in compliance with all of its covenants under its credit facilities.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References + Details

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Dec. 31, 2012
Commitments and Contingencies [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Legal and Regulatory Proceedings Certain conditions may exist as of the date that the financial statements are issued, which may result in a loss to the Company but which will only be resolved when one or more future events occur or fail to occur. The Company assesses such contingent liabilities, and such assessment inherently involves an exercise of judgment. In assessing loss contingencies related to legal and regulatory proceedings that are pending against the Company or unasserted claims that may result in such proceedings, the Company's legal counsel evaluates the perceived merits of any legal and regulatory proceedings or unasserted claims as well as the perceived merits of the amount of relief sought or expected to be sought therein. If the assessment of a contingency indicates that it is probable that a material loss had been incurred at the date of the financial statements and the amount of the liability can be estimated, then the estimated liability would be accrued in the Company's financial statements. If the assessment indicates that a potentially material loss contingency is not probable, but is reasonably possible, or is probable but cannot be estimated, then the nature of the contingent liability, together with an estimate of the range of possible loss if determinable and material, would be disclosed. Neither accrual nor disclosure is required for loss contingencies that are deemed remote. The Company accrues legal fees related to contingent liabilities as they are incurred. In addition to the matters discussed below, from time to time and in the ordinary course of business, the Company is involved in various legal and regulatory actions and proceedings, including tort claims, contractual disputes, employment matters, workers' compensation claims and collections. The Company carries insurance that provides protection against certain types of claims, up to the policy limits of the insurance. As of December 31, 2012 and September 30, 2012, the condensed consolidated balance sheets include loss contingency accruals recorded prior to September 30, 2012 and during the three months ended December 31, 2012, which are not material, individually or in the aggregate, to the Company's financial position or liquidity. During the three months ended December 31, 2012, the Company accrued expense related to loss contingencies of $1.5 million. In the opinion of management, possible exposure in these matters in excess of the amounts accrued, and in addition to the possible losses discussed below, is not material to the Company's earnings, financial position or liquidity. The following is a summary of significant legal matters involving the Company. Securities Litigation and Regulatory Proceedings FCStone and certain officers of FCStone were named as defendants in an action filed in the United States District Court for the Western District of Missouri in July 2008. A consolidated amended complaint ("CAC") was subsequently filed in September 2009. As alleged in the CAC, the action purports to be brought as a class action on behalf of purchasers of FCStone common stock between November 15, 2007 and February 24, 2009. The CAC seeks to hold defendants liable under Section 10(b) and Section 20(a) of the Securities Exchange Act of 1934 and concerns disclosures included in FCStone's fiscal year 2008 public filings. Specifically, the CAC relates to FCStone's public disclosures regarding an interest rate hedge, a bad debt expense arising from unprecedented events in the cotton trading market, and certain disclosures beginning on November 3, 2008 related to losses it expected to incur arising primarily from a customer energy trading account. FCStone and the named officers moved to dismiss the action. The parties to the litigation reached an agreement in principle to settle this matter during May 2012. The proposed settlement would be at no cost to the Company after consideration of insurance, and is subject to approval by the court. The terms of the settlement are expected to be presented to the court for approval before July 2013. In August 2008, a shareholder derivative action was filed against FCStone and certain directors of FCStone in the Circuit Court of Platte County, Missouri, alleging breaches of fiduciary duties, waste of corporate assets and unjust enrichment. An amended complaint was subsequently filed in May 2009 to add claims based upon the losses sustained by FCStone arising out of a customer energy trading account. In July 2009, the same plaintiff filed a motion for leave to amend the existing case to add a purported class action claim on behalf of the holders of FCStone common stock. In July 2009, a purported shareholder class action complaint was filed against FCStone and its directors, as well as the Company in the Circuit Court of Clay County, Missouri. The complaint alleged that FCStone and its directors breached their fiduciary duties by failing to maximize stockholder value in connection with the contemplated acquisition of FCStone by the Company. This complaint was subsequently consolidated with the complaint filed in the Circuit Court of Platte County, Missouri. The plaintiffs subsequently filed an amended consolidated complaint which does not assert any claims against the Company. This complaint purports to be filed derivatively on FCStone and the Company's behalf and against certain of FCStone's current and former directors and officers and directly against the same individuals. The Company, FCStone and the defendants filed motions to dismiss on multiple grounds. The parties to the litigation reached an agreement in principle to settle this matter during October 2012. The proposed settlement would result in the Company incurring a legal cost of $250,000 after consideration of insurance, and is subject to approval by the court. The terms of the settlement are expected to be presented to the court for approval before July 2013. As previously disclosed, the staff of the Fort Worth Regional Office of the SEC had conducted a formal investigation of FCStone's disclosures and accounting for losses associated with the customer energy trading account, which occurred prior to the Company's acquisition of FCStone on September 30, 2009. The Company cooperated fully with the SEC's staff in its investigation. During the quarter ended March 31, 2012, the Company was informed that the Staff of the SEC had closed its investigation of FCStone, and was not taking enforcement action against FCStone or any of its current or former officers. In November 2011, the Commodity Futures Trading Commission ("CFTC") Division of Enforcement Staff ("Staff") requested the Company to voluntarily produce specified documents to the Staff in connection with its then informal investigation of the losses that occurred in 2008 in the customer energy trading account of FCStone, LLC. In September 2012, the Staff provided the Company with a Wells notice, indicating the Staff's intention to recommend that the CFTC bring certain charges against FCStone, LLC. The Company filed its Wells Submission with the Staff in October 2012. The Company is in ongoing discussions with the CFTC regarding this matter. Sentinel Litigation The Company's subsidiary, FCStone, LLC, had a portion of its excess segregated funds invested with Sentinel Management Group Inc. ("Sentinel"), a registered FCM and an Illinois-based money manager that provided cash management services to other FCMs. In August 2007, Sentinel halted redemptions to customers and sold certain of the assets it managed to an unaffiliated third party at a significant discount. On August 17, 2007, subsequent to Sentinel's sale of certain assets, Sentinel filed for bankruptcy protection and $15.5 million of FCStone, LLC's $21.9 million in invested funds were returned to it. In August 2008, the bankruptcy trustee of Sentinel filed adversary proceedings against FCStone, LLC, and a number of other FCMs in the Bankruptcy Court for the Northern District of Illinois. The case was subsequently reassigned to the United States District Court, for the Northern District of Illinois. In the complaint, the trustee is seeking avoidance of alleged transfers or withdrawals of funds received by FCStone, LLC and other FCMs within 90 days prior to the filing of the Sentinel bankruptcy petition, as well as avoidance of post-petition distributions and disallowance of the proof of claim filed by FCStone, LLC. The trustee seeks recovery of pre- and post-petition transfers totaling approximately $15.5 million. In April 2009, the trustee filed an amended complaint adding a claim for unjust enrichment. FCStone, LLC answered the complaints and all parties entered into the discovery phase of the litigation. In January 2011, the trustee filed a motion for summary judgment on various counts in the adversary proceedings filed in August 2008 against FCStone, LLC and a number of other FCMs. In January 2012, FCStone, LLC filed a motion for summary judgment in its favor with respect to the transfer of approximately $1.1 million to its customer segregated account on August 17, 2007, pursuant to the "safe harbor" provisions of Section 546(e) of the U.S. Bankruptcy Code. In April 2012, FCStone, LLC filed a motion to dismiss a portion of the trustee's claims set forth in its amended complaint. The trial of this matter took place, as a test case, during October 2012. The trial court entered a judgment against FCStone, LLC on January 4, 2013. On January 17, 2013, the trial court entered an agreed order, staying execution and enforcement, pending an appeal of the judgment. By agreement, FCStone, LLC was required to post an appeal cash deposit of $8.0 million with the court, which was deposited on January 18, 2013. Based upon the merits of the Company's appeal, management believes a loss is not probable, and thus has not recorded a provision for this matter. The Company believes that if the appeal is unsuccessful, the resulting pre-tax loss to FCStone, LLC would be between $4 million and $6 million. Contractual Commitments Contingent Liabilities - Acquisitions Under the terms of the purchase agreements related to the acquisitions listed below, the Company has obligations to pay additional consideration if specific conditions and earnings targets are met. In accordance with the Business Combinations Topic of the ASC, the fair value of the additional consideration is recognized as a contingent liability as of the acquisition date. The contingent liability for these estimated additional purchase price considerations are included within ‘accounts payable and other accrued liabilities’ in the condensed consolidated balance sheets as of December 31, 2012 and September 30, 2012. The acquisition date fair value of additional consideration is remeasured to its fair value each reporting period, with changes in fair value recorded in current earnings. The Company has recorded an estimated contingent liability of $3.1 million, relating to the December 2012 acquisition of the institutional accounts of Tradewire Securities, LLC, as described in Note 16. The Company has a contingent liability relating to the November 2011 acquisition of Coffee Network, LLC, subsequently reorganized as a division of FCStone, LLC, which may result in the payment of additional purchase price consideration. The contingent liability recorded represents the fair value of the expected consideration to be paid, based on the forecasted adjusted pre-tax net earnings during the three annual periods following the closing of the acquisition plus a final contingent payment, and a discount rate being applied to those future payments. The present value of the estimated total purchase price, including contingent consideration, is less than $0.3 million as of December 31, 2012, of which less than $0.1 million has not been paid and is included within ‘accounts payable and other liabilities’ in the condensed consolidated balance sheet. The Company has a contingent liability relating to the October 2010 acquisition of Hencorp Becstone Futures, L.C., subsequently reorganized as a division of FCStone, LLC , which may result in the payment of additional purchase price consideration. The contingent liability recorded represents the fair value of the expected consideration to be paid, based on the forecasted adjusted pre-tax net earnings during the third and fourth fiscal years following the closing of the acquisition and a discount rate being applied to those future payments. The change in fair value for the three months ended December 31, 2012 was an increase of $0.1 million, included within ‘other expense’ in the condensed consolidated income statement. The present value of the estimated total purchase price, including contingent consideration, is $6.6 million as of December 31, 2012, of which $2.5 million has not been paid and is included within ‘accounts payable and other liabilities’ in the condensed consolidated balance sheet. The Company has a contingent liability relating to the July 2010 acquisition of the Hanley Companies, which may result in the payment of additional purchase price consideration. The contingent liability recorded represents contingent payments equal to 15% of the adjusted earnings before interest and taxes of the soft commodities derivatives business of the acquired Hanley Companies and INTL Hanley, LLC (the “Derivatives Division”) for the twelve-month period ending June 30, 2013 and a final contingent payment based on the cumulative adjusted earnings before taxes of the Derivatives Division for the three year period commencing on July 1, 2010, with a discount rate being applied to those future payments. Based on the purchase agreement, the remaining additional consideration is limited to a maximum of $10.0 million. The change in fair value for the three months ended December 31, 2012 was an increase of $0.2 million, included within ‘other expense’ in the condensed consolidated income statement. The present value of the estimated total purchase price, including contingent consideration, is $53.7 million as of December 31, 2012, of which $9.5 million has not been paid and is included within ‘accounts payable and other liabilities’ in the condensed consolidated balance sheet. The Company has a contingent liability relating to the April 2010 acquisition of the RMI Companies, subsequently reorganized as divisions of FCStone, LLC, which may result in the payment of additional consideration. The contingent liability recorded represents the fair value of expected consideration to be paid based on the forecasted sales during the twelve-month period ending March 31, 2013, and a discount rate being applied to that future payment. The change in fair value for the three months ended December 31, 2012 was an increase of $0.1 million, included within ‘other expense’ in the condensed consolidated income statement. The present value of the estimated total purchase price, including contingent consideration, is $15.2 million as of December 31, 2012, of which $3.0 million has not been paid and is included within ‘accounts payable and other liabilities’ in the condensed consolidated balance sheet. Exchange Member Guarantees The Company is a member of various exchanges that trade and clear futures and option contracts. Associated with its memberships, the Company may be required to pay a proportionate share of the financial obligations of another member who may default on its obligations to the exchanges. While the rules governing different exchange memberships vary, in general the Company’s guarantee obligations would arise only if the exchange had previously exhausted its resources. In addition, any such guarantee obligation would be apportioned among the other non-defaulting members of the exchange. Any potential contingent liability under these membership agreements cannot be estimated. The Company has not recorded any contingent liability in the condensed consolidated financial statements for these agreements and believes that any potential requirement to make payments under these agreements is remote.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

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-Name Accounting Standards Codification
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-Paragraph 8
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25287-109308

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Capital and Other Regulatory Requirements

3 Months Ended

Dec. 31, 2012

Capital and Other Regulatory Requirements [Abstract]

Regulatory Capital Requirements under Banking Regulations [Text Block]

Capital and Other Regulatory Requirements

The Company's activities are subject to significant governmental regulation, both in the United States and overseas. The subsidiaries of the Company are in compliance with all of their regulatory requirements as of December 31, 2012, as follows:



(in millions)			As of December 31, 2012
Subsidiary	Regulatory Authority	Requirement Type	Actual		Minimum Requirement
FCStone, LLC	CFTC	Net capital	$	98.7	$	68.6
FCStone, LLC	CFTC	Segregated funds	$	1,574.7	$	1,550.6
FCStone, LLC	CFTC	Secured funds	$	74.1	$	62.5
INTL FCStone (Europe)	FSA	Net capital	$	43.0	$	21.4
INTL FCStone (Europe)	FSA	Segregated funds	$	90.6	$	88.5
INTL Global Currencies Limited	FSA	Net capital	$	19.4	$	0.5
TRX Futures Limited	FSA	Capital adequacy	$	8.2	$	3.0
INTL FCStone Securities Inc.	SEC	Net capital	$	2.0	$	1.0
FCC Investments, Inc.	SEC	Net capital	$	0.4	$	0.3
FCStone Australia	Australian Securities and Investment Commission	Net capital	$	2.0	$	1.0
FCStone Australia	New Zealand Clearing Ltd	Capital adequacy	$	11.5	$	0.8
FCStone Europe	Central Bank of Ireland	Net capital	$	2.0	$	0.5
INTL FCStone DTVM Ltda.	Brazilian Central Bank and Securities and Exchange Commission of Brazil	Capital adequacy	$	0.9	$	0.7

Certain other non-U.S. subsidiaries of the Company are also subject to capital adequacy requirements promulgated by authorities of the countries in which they operate. As of December 31, 2012, these subsidiaries were in compliance with their local capital adequacy requirements.

- Definition

The entire disclosure for banks, savings institutions, and credit unions, for regulatory capital requirements imposed by the Federal Reserve System (FRB), the Federal Deposit Insurance Corporation (FDIC), the Office of Thrift Supervision (OTS) or for any state imposed capital requirements, as applicable. The disclosure may include (1) a description of regulatory capital requirements (a) for capital adequacy purposes and (b) established by the prompt corrective action provisions of Section 38 of the Federal Depository Insurance Act; (2) the actual or possible material effects of noncompliance with such requirements; (3) whether the entity is in compliance with the regulatory capital requirements including (a) required and actual ratios and amounts of Tier 1 leverage, Tier 1 risk-based, and total risk-based capital, tangible capital (for savings institutions), and Tier 3 capital for market risk (for certain banks and bank holding companies), (b) factors that may significantly affect capital adequacy; (4) the prompt corrective action category in which the entity was classified as of its most recent notification; (5) whether management believes any conditions or events since notification have changed the entity's category. Also may include additional information that might be disclosed in situations where substantial doubt about the entity's ability to continue as a going concern for a reasonable period of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1G
-URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958577-112826

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958574-112826

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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-DEP
-Paragraph 15, 16, 17
-IssueDate 2006-05-01
-Chapter 17
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Stock-Based Compensation

3 Months Ended

Dec. 31, 2012

Stock-Based Compensation [Abstract]

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

Stock-Based Compensation

Stock-based compensation expense is included within 'compensation and benefits' in the condensed consolidated income statements and totaled $1.6 million and $1.0 million for the three months ended December 31, 2012 and 2011, respectively.

Stock Option Plan

The Company sponsored a stock option plan for its directors, officers, employees and consultants. The Company's current stock option plan expired on December 17, 2012. The Company's Board of Directors has approved a new stock option plan ("the 2013 Stock Option Plan"), which is subject to shareholder approval at the 2013 annual meeting of shareholders, and would authorize the Company to issue stock options covering up to 1.0 million shares of the Company's common stock. If shareholder approval is not obtained, the stock option plan shall terminate. Options may be granted prior to the obtaining of such shareholder approval, but the exercise of such options shall be conditioned upon such shareholder approval. As of December 31, 2012, there were 1.0 million shares authorized for future grant under this plan. The Company settles stock option exercises with newly issued shares of common stock.

Fair value is estimated at the grant date based on a Black-Scholes-Merton option-pricing model using the following weighted-average assumptions:



	Three Months Ended December 31, 2012
Expected stock price volatility	35%
Expected dividend yield	—%
Risk free interest rate	0.37%
Average expected life (in years)	2.88

Expected stock price volatility rates are based primarily on the historical volatility. The Company has not paid dividends in the past and does not currently expect to do so in the future. Risk free interest rates are based on the U.S. Treasury yield curve in effect at the time of grant for periods corresponding with the expected life of the option award. The average expected life represents the estimated period of time that options or awards granted are expected to be outstanding, based on the Company’s historical share option exercise experience for similar option grants. The weighted average fair value of options issued during the three months ended December 31, 2012 was $4.31.

The following is a summary of stock option activity for the three months ended December 31, 2012:



	Shares Available for Grant		Number of Options Outstanding		Weighted Average Price		Weighted Average Grant Date Fair Value		Weighted Average Remaining Term (in years)	Aggregate Intrinsic Value ($ millions)
Balances as of September 30, 2012	921,412		1,890,634		$	23.36	$	11.11	5.45	$	6.0
Expiration of 2003 Plan	(828,321	)
Additional shares authorized	1,000,000
Granted	(100,000	)	100,000		$	17.92	$	4.31
Exercised			(25,667	)	$	7.10	$	3.27
Forfeited	6,666		(6,666	)	$	7.26	$	3.38
Expired	243		(243	)	$	15.02	$	6.67
Balances as of December 31, 2012	1,000,000		1,958,058		$	23.35	$	10.89	5.20	$	4.7
Exercisable as of December 31, 2012			831,845		$	24.07	$	10.07	2.32	$	3.4

The total compensation cost not yet recognized for non-vested awards of $11.5 million as of December 31, 2012 has a weighted-average period of 6.33 years over which the compensation expense is expected to be recognized. The total intrinsic value of options exercised during the three months ended December 31, 2012 and 2011 was $0.5 million, and $0.3 million, respectively.

Restricted Stock Plan

The Company sponsors a restricted stock plan for its directors, officers and employees. As of December 31, 2012, 1,243,127 shares were authorized for future grant under the 2012 restricted stock plan. Awards that expire or are canceled generally become available for issuance again under the plan. The Company utilizes newly issued shares of common stock to make restricted stock grants.

The following is a summary of restricted stock activity through December 31, 2012:



	Shares Available for Grant		Number of Shares Outstanding		Weighted Average Grant Date Fair Value		Weighted Average Remaining Term (in years)	Aggregate Intrinsic Value ($ millions)
Balances as of September 30, 2012	1,420,114		512,124		$	22.09	1.81	$	9.8
Granted	(177,034	)	177,034		$	17.84
Vested			(157,408	)	$	20.85
Forfeited	47		(47	)	$	21.40
Balances as of December 31, 2012	1,243,127		531,703		$	21.04	2.30	$	9.3

The total compensation cost not yet recognized of $9.7 million as of December 31, 2012 has a weighted-average period of 2.30 years over which the compensation expense is expected to be recognized. Compensation expense is amortized on a straight-line basis over the vesting period. Restricted stock grants are included in the Company’s total issued and outstanding common shares.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64, 65, A240
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 93-6
-Paragraph 53
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Acquisitions	3 Months Ended
Acquisitions	Dec. 31, 2012
Acquisitions [Abstract]
Business Combination Disclosure [Text Block]	Acquisitions Tradewire On December 12, 2012, the Company finalized an agreement in which Tradewire Securities, LLC, a Miami-based securities broker-dealer servicing customers throughout Latin America and a wholly-owned subsidiary of Tradewire Group Ltd., transferred its institutional accounts to INTL FCStone Inc.'s broker-dealer subsidiary, INTL FCStone Securities. Tradewire Securities, LLC provided global brokerage services to a wide range of customers, including hedge funds, pension funds, broker-dealers and banks located in Latin America, Caribbean, North America and Europe. Additionally, as part of the transaction, the Company hired more than 20 professional staff from Tradewire Securities, LLC's securities broker-dealer business based in Miami, Florida. The consideration to be paid for the acquisition of institutional accounts from Tradewire Securities, LLC consists of three annual contingent payments and a final contingent payment and is estimated to be $3.1 million as of December 31, 2012. The purchase price for the acquisition is not expected to be material to the condensed consolidated financial statements. The allocation of the purchase price to separately identifiable intangible assets is preliminary in nature, and is subject to adjustment as additional information is obtained, including but not limited to the calculation of the contingent consideration and valuation of separately identifiable intangible assets. These calculations and valuations of any identified intangible assets are subject to change within the measurement period (up to one year from the acquisition date) as valuations are finalized. When the valuations are finalized, any changes may result in adjustments to separately identifiable intangible assets and goodwill. Any adjustments made to the valuations are not expected to be material. The intangible assets recognized in this transaction of $3.1 million were assigned to the SEC segment.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

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-Number 88-16
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Income Taxes	3 Months Ended
Income Taxes	Dec. 31, 2012
Income Taxes [Abstract]
Income Tax Disclosure [Text Block]	Income Taxes In determining the quarterly provision for income taxes, management uses an estimated annual effective tax rate which is based on the expected annual income and statutory tax rates in the various jurisdictions in which it operates. The Company’s effective tax rate differs from the U.S. statutory rate primarily due to state and local taxes, and differing statutory tax rates applied to the income of non-U.S. subsidiaries. The Company records the tax effect of certain discrete items, including the effects of changes in tax laws, tax rates and adjustments with respect to valuation allowances or other unusual or nonrecurring tax adjustments, in the interim period in which they occur, as an addition to, or reduction from, the income tax provision, rather than being included in the estimated effective annual income tax rate. In addition, jurisdictions with a projected loss for the year or a year-to-date loss where no tax benefit can be recognized are excluded from the estimated annual effective income tax rate. The Company is required to assess its deferred tax assets and the need for a valuation allowance at each reporting period. This assessment requires judgment on the part of management with respect to benefits that may be realized. The Company will record a valuation allowance against deferred tax assets when it is considered more likely than not that all or a portion of our deferred tax assets will not be realized. The income tax expense (benefit) from operations of $5.5 million and $(0.2) million for the three months ended December 31, 2012 and 2011, respectively, reflect estimated federal, foreign and state taxes. The Company’s effective tax rate was 29% for the three months ended December 31, 2012 and 2011, respectively. The Company and its subsidiaries file income tax returns with the U.S. federal jurisdiction and various state and foreign jurisdictions. FCStone is a wholly-owned subsidiary acquired on September 30, 2009. Both INTL FCStone Inc. and FCStone are under separate state examinations for various periods, ranging from August 31, 2006 through September 30, 2011.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

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-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Segment Analysis

3 Months Ended

Dec. 31, 2012

Segment Analysis [Abstract]

Segment Reporting Disclosure [Text Block]

Segment Analysis

The Company reports its operating segments based on services provided to customers. The Company’s activities are divided into the following functional areas:


•	Commodity and Risk Management Services


•	Foreign Exchange


•	Securities


•	Clearing and Execution Services


•	Other

Commodity and Risk Management Services (C&RM)

The Company serves its commercial customers through its force of risk management consultants with a high value added service that differentiates the Company from other competitors and maximizes the opportunity to retain customers. The Integrated Risk Management Program ("IRMP®") involves providing customers with commodity risk management consulting services that are designed to develop a customized long term hedging program to help them mitigate their exposure to commodity price risk and maximize the amount and certainty of their operating profits. Customers are assisted in the execution of their hedging strategies through the Company’s exchange-traded futures and options clearing and execution operations and through access to more customized alternatives provided by the OTC trading desk. Generally, customers direct their own trading activity and risk management consultants do not have discretionary authority to transact trades on behalf of customers. When transacting OTC contracts with customers, the Company may offset the customer's transaction simultaneously with one of its trading counterparties. Alternatively, the OTC trade desk will accept a customer transaction and offset that transaction with a similar but not identical position on the exchange.

In addition, the Company provides a full range of trading and hedging capabilities to select producers, consumers, recyclers and investors in both precious and base metals, as well as certain other related commodities. This includes acting as a Category One ring dealing member of the LME, providing execution, clearing and advisory services in exchange traded futures and OTC products. Acting as a principal, the Company commits its own capital to buy and sell the metals on a spot and forward basis.

The Company records its physical commodities revenues on a gross basis. Operating revenues and losses from the Company’s commodities derivatives activities are included within ‘trading gains’ in the condensed consolidated income statements. Inventory for the commodities business is valued at the lower of cost or fair value, under the provisions of the Inventory Topic of the ASC. The Company generally mitigates the price risk associated with commodities held in inventory through the use of derivatives. The Company does not elect hedge accounting under U.S. GAAP in accounting for this price risk mitigation. In such situations, unrealized gains in inventory are not recognized under U.S. GAAP, but unrealized gains and losses in related derivative positions are recognized under U.S. GAAP. As a result, the Company’s reported earnings from commodities trading may be subject to significant volatility when calculated under U.S. GAAP.

Foreign Exchange

The Company provides treasury, global payment and foreign exchange services to financial institutions, multi-national corporations, government organizations and charitable organizations as well as assisting commercial customers with the execution of foreign exchange hedging strategies. The Company transacts in over 130 currencies and specializes in smaller, more difficult emerging markets where there is limited liquidity. In addition, the Company executes trades based on the foreign currency flows inherent in the Company’s existing business activities. The Company primarily acts as a principal in buying and selling foreign currencies on a spot basis. The Company derives revenue from the difference between the purchase and sale prices.

The Company also provides spot foreign currency trading for a customer base of eligible contract participants and high net worth retail customers as well as operating a proprietary foreign exchange desk which arbitrages the futures and cash markets.

Securities

Through INTL FCStone Securities, Inc., the Company acts as a wholesale market maker in select foreign securities including unlisted ADRs and foreign ordinary shares and provides execution in select debt instruments and exchange-traded funds ("ETFs"). INTL Trading provides execution and liquidity to national broker-dealers, regional broker-dealers and institutional investors.

The Company makes markets in approximately 800 ADRs and foreign ordinary shares traded in the OTC market. In addition, the Company will, on request, make prices in more than 8,000 other ADRs and foreign common shares. As a market-maker, the Company provides trade execution services by offering to buy shares from, or sell shares to, broker-dealers and institutions. The Company displays the prices at which it is willing to buy and sell these securities and adjusts its prices in response to market conditions. When acting as principal, the Company commits its own capital and derives revenue from the difference between the prices at which the Company buys and sells shares. The Company also earns commissions by executing trades on an agency basis.

While the Company’s customers are other broker-dealers and institutions, the business tends to be driven by the needs of the private clients of those broker-dealers and institutions. The size of private client trades may be uneconomical for the in-house international equities trading desks of our customers to execute. The Company is able to provide execution of smaller trades at profitable margins.

The Company provides a full range of investment banking advisory services to commercial customers including the issuance of loans or equity. The Company also originates, structures and places a wide array of emerging market debt instruments in the international and domestic capital markets. These instruments include complex asset backed securities, unsecured bond and loan issues, negotiable notes and other trade-related debt instruments used in cross-border trade finance. On occasions the Company may invest its own capital in debt instruments before selling them. It also actively trades in a variety of international debt instruments.

Clearing and Execution Services (CES)

The Company seeks to provide competitive and efficient clearing and execution of exchange-traded futures and options for the institutional and professional trader market segments. Through its platform, customer orders are accepted and directed to the appropriate exchange for execution. The Company then facilitates the clearing of customers’ transactions. Clearing involves the matching of customers’ trades with the exchange, the collection and management of margin deposits to support the transactions, and the accounting and reporting of the transactions to customers. The Company seeks to leverage its capabilities and capacity by offering facilities management or outsourcing solutions to other FCMs.

Other

This segment consists of the Company’s asset management and commodity financing and facilitation business. The asset management revenues include fees, commissions and other revenues received by the Company for management of third party assets and investment gains or losses on the Company’s investments in funds and proprietary accounts managed either by the Company’s investment managers or by independent investment managers.

The Company operates a commodity financing and facilitation business which provides financing to commercial commodity-related companies against physical inventories, including grain, lumber, meats, energy products and renewable fuels. Sale and repurchase agreements are used to purchase commodities evidenced by warehouse receipts, subject to a simultaneous agreement to sell such commodities back to the original seller at a later date. These transactions are accounted for as product financing arrangements, and accordingly no commodity inventory, purchases or sales are recorded. Additionally, the Company, as a principal, engages in physical purchase and sale transactions related to inputs to the renewable fuels and feed ingredient industries.

********

The total revenues reported combine gross revenues for the physical commodities business and net revenues for all other businesses. In order to reflect the way that the Company’s management views the results, the tables below also reflect the segment contribution to ‘operating revenues’, which is shown on the face of the condensed consolidated income statements and which is calculated by deducting physical commodities cost of sales from total revenues.

Segment data includes the profitability measure of net contribution by segment. Net contribution is one of the key measures used by management to assess the performance of each segment and for decisions regarding the allocation of the Company’s resources. Net contribution is calculated as revenue less direct cost of sales, clearing and related expenses, variable compensation, introducing broker commissions and interest expense. Variable compensation paid to risk management consultants / traders generally represents a fixed percentage of an amount equal to revenues generated, and in some cases, revenues produced less clearing and related charges, base salaries and an overhead allocation.

Segment data also includes segment income which is calculated as net contribution less non-variable direct expenses of the segment. These non-variable direct expenses include trader base compensation and benefits, operational employee compensation and benefits, communication and data services, business development, professional fees, bad debt expense and other direct expenses.

Inter-segment revenues, charges, receivables and payables are eliminated upon consolidation, except revenues and costs related to foreign currency transactions undertaken on an arm’s length basis by the foreign exchange trading business for the securities business. The foreign exchange trading business competes for this business as it does for any other business. If its rates are not competitive, the securities businesses buy or sell their foreign currency through other market counterparties.

On a recurring basis, the Company sweeps excess cash from certain operating segments to a centralized corporate treasury function in exchange for an intercompany receivable asset. The intercompany receivable asset is eliminated during consolidation, and therefore this practice may impact reported total assets between segments.

Information concerning operations in these segments of business is shown in accordance with the Segment Reporting Topic of the ASC as follows:



	Three Months Ended December 31,
(in millions)	2012			2011
Total revenues:
Commodity and Risk Management Services	$	12,619.8		$	17,202.0
Foreign Exchange	16.2			17.9
Securities	12.9			9.9
Clearing and Execution Services	22.4			17.7
Other	39.5			45.2
Corporate unallocated	8.7			(2.3		)
Total	$	12,719.5		$	17,290.4
Operating revenues (loss):
Commodity and Risk Management Services	$	60.7		$	50.0
Foreign Exchange	16.2			17.9
Securities	12.9			9.9
Clearing and Execution Services	22.4			17.7
Other	4.8			3.1
Corporate unallocated	8.7			(2.3		)
Total	$	125.7		$	96.3
Net contribution:
(Revenues less cost of sales, clearing and related expenses, variable bonus compensation, introducing broker commissions and interest expense):
Commodity and Risk Management Services	$	40.5		$	29.8
Foreign Exchange	10.4			11.7
Securities	6.9			4.5
Clearing and Execution Services	3.6			2.5
Other	2.8			2.1
Total	$	64.2		$	50.6
Segment income (loss):
(Net contribution less non-variable direct segment costs):
Commodity and Risk Management Services	$	22.7		$	13.1
Foreign Exchange	7.1			9.0
Securities	3.2			1.1
Clearing and Execution Services	(0.9		)	(0.1		)
Other	1.9			0.8
Total	$	34.0		$	23.9
Reconciliation of segment income to income (loss) from operations, before tax:
Segment income	$	34.0		$	23.9
Costs not allocated to operating segments	15.2			24.6
Income (loss) from operations, before tax	$	18.8		$	(0.7	)

(in millions)	As of December 31, 2012			As of September 30, 2012
Total assets:
Commodity and Risk Management Services	$	1,422.1		$	1,449.2
Foreign Exchange	134.7			124.5
Securities	137.7			88.7
Clearing and Execution Services	1,032.4			1,090.9
Other	95.0			110.8
Corporate unallocated	117.7			94.8
Total	$	2,939.6		$	2,958.9

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Commodity and Other Repurchase Agreements	3 Months Ended
Commodity and Other Repurchase Agreements	Dec. 31, 2012
Commodity and Other Repurchase Agreements [Abstract]
Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block]	Commodity and Other Repurchase Agreements The Company's outstanding notes receivable in connection with the sale/repurchase agreements, whereby the customers sell certain commodity inventory and agree to repurchase the commodity inventory at a future date at either a fixed or floating rate, as of December 31, 2012 and September 30, 2012 were $66.7 million and $92.5 million, respectively. The obligations outstanding related to commodities sold under repurchase agreements that are recorded within 'broker-dealers, clearing organizations and counterparties' as of December 31, 2012 and September 30, 2012 were $4.1 million and $37.0 million, respectively. The obligations outstanding related to commodities sold under repurchase agreements that are recorded within 'lenders under loans' as of December 31, 2012 and September 30, 2012 were $56.4 million and $43.2 million, respectively.

Basis of Presentation and Consolidation and Recently Issued Accounting Standards Accounting Policies (Policies)	3 Months Ended
	Dec. 31, 2012
Basis of Presentation and Consolidation [Abstract]
Basis of Accounting, Policy [Policy Text Block]	The accompanying condensed consolidated balance sheet as of September 30, 2012, which has been derived from audited financial statements, and the unaudited interim condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Certain information and note disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") have been condensed or omitted pursuant to those rules and regulations. The Company believes that the disclosures made are adequate to make the information presented not misleading. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation of the condensed consolidated financial statements for the interim periods presented have been reflected as required by Rule 10-01 of Regulation S-X. Operating results for interim periods are not necessarily indicative of the results that may be expected for the full year. It is suggested that these interim condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and related notes contained in the Company’s Form 10-K for the fiscal year ended September 30, 2012 filed with the SEC.
Consolidation, Policy [Policy Text Block]	These condensed consolidated financial statements include the accounts of INTL FCStone Inc. and all other entities in which the Company has a controlling financial interest. All material intercompany transactions and balances have been eliminated in consolidation.
Fiscal Period, Policy [Policy Text Block]	fiscal year end is September 30, and the fiscal quarters end on December 31, March 31, June 30 and September 30. Unless otherwise stated, all dates refer to fiscal years and fiscal interim periods.
Use of Estimates, Policy [Policy Text Block]	The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. The most significant of these estimates and assumptions relate to fair value measurements for financial instruments and investments, revenue recognition, the provision for potential losses from bad debts, valuation of inventories, valuation of goodwill and intangible assets, incomes taxes and contingencies. Although these and other estimates and assumptions are based on the best available information, actual results could be materially different from these estimates.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements In June 2011, the Financial Accounting Standards Board ("FASB") issued new guidance on the presentation of comprehensive income. This guidance eliminates the current option to report comprehensive income and its components in the statement of changes in equity. Under this guidance, an entity can elect to present items of net income and comprehensive income in one continuous statement or in two separate, but consecutive, statements. In addition, the guidance requires entities to show the effects of items reclassified from accumulated other comprehensive loss to net income on the face of the financial statements. This guidance is effective for fiscal years beginning after December 15, 2011 and interim and annual periods thereafter. Early adoption is permitted, but full retrospective application is required. This guidance was effective in the Company's first quarter of fiscal year 2013. In December 2011, the FASB issued guidance that deferred the portion of the original guidance that required a company to separately present within net income reclassification adjustments of items out of accumulated other comprehensive loss. The deferral is intended to be temporary until the FASB has time to reconsider these changes. The other provisions of this guidance became effective as originally planned by the FASB. The Company adopted this guidance in the first quarter of fiscal year 2013, and the Company elected the two statement approach. The application of this guidance relates to presentation only and did not have a significant impact on the Company's condensed consolidated financial statements. On December 16, 2011, the FASB issued new guidance on the disclosures about offsetting assets and liabilities. While the FASB retained the existing offsetting models under U.S. GAAP, the new standard requires disclosures to allow investors to better compare and understand significant quantitative differences in financial statements prepared under U.S. GAAP. The new standard is effective for annual periods beginning on or after January 1, 2013, and interim periods within those annual periods. Retrospective application is required. This guidance is effective for the Company's fiscal year beginning October 1, 2013. The Company expects to adopt this guidance starting with the first quarter of fiscal year 2014. The adoption of this guidance is expected to change some of the Company's disclosures within the notes to its condensed consolidated financial statements. In July 2012, the FASB issued final guidance on indefinite-lived intangible assets impairment testing. Under the guidance, entities testing indefinite-lived intangibles for impairment have the option of first performing a qualitative assessment to determine whether it is more likely than not that an indefinite-lived intangible asset is impaired. If a company determines that it is more likely than not that the fair value of such an asset exceeds its carrying amount, it would not need to calculate the fair value of the asset in that year. However, if a company concludes otherwise, it must calculate the fair value of the asset, compare that value with its carrying amount and record an impairment charge, if any. The guidance does not revise the requirement to test indefinite-lived intangible assets annually for impairment. In addition, the guidance does not amend the requirement to test indefinite-lived intangible assets for impairment between annual tests if events or circumstances warrant, however, it does revise the examples of events and circumstances that an entity should consider. The guidance is effective for annual and interim impairment tests performed for fiscal years beginning after September 15, 2012. Early adoption is permitted. The Company is currently evaluating the impact of this guidance, however, it is expected that the adoption of this guidance will not have a material impact on the Company's condensed consolidated financial statements.

- Definition

Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2197480

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 40
-Section 45
-URI http://asc.fasb.org/section&trid=2197723

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2196966

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-SubTopic 20
-URI http://asc.fasb.org/subtopic&trid=2197087

Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

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-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.3A-02)
-URI http://asc.fasb.org/extlink&oid=6959686&loc=d3e355033-122828

Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 4
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=18733093&loc=d3e5614-111684

Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 4
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 5, 6, 16-19
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
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-Name Emerging Issues Task Force (EITF)
-Number 96-16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
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-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 4
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 20
-Subparagraph a(2)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 2-6
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 15: http://www.xbrl.org/2003/role/presentationRef
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-Name Emerging Issues Task Force (EITF)
-Number 97-2
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph k
-Article 1

Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 46
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Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02, 03
-Article 3A

Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Disclosure of accounting policy for determining an entity's fiscal year or other fiscal period. This disclosure may include identification of the fiscal period end-date, the length of the fiscal period, any reporting period lag between the entity and its subsidiaries, or equity investees. If a reporting lag exists, the closing date of the entity having a different period end is generally noted, along with an explanation of the necessity for using different closing dates. Any intervening events that materially affect the entity's financial position or results of operations are generally also disclosed.

+ References + Details

Earnings per Share Earnings Per Share (Policies)	3 Months Ended
Earnings per Share Earnings Per Share (Policies)	Dec. 31, 2012
Earnings Per Share [Abstract]
Earnings Per Share, Potentially Dilutive Securities	The dilutive effect of share-based awards is reflected in diluted net income (loss) per share by application of the treasury stock method, which includes consideration of unamortized share-based compensation expense required under the Compensation – Stock Compensation Topic of the ASC.

- Definition

Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.

+ References + Details

Receivables from customers and notes receivable, net Receivables from customers and notes receivable, net (Policies)	3 Months Ended
	Dec. 31, 2012
Receivables from customers and notes receivable, net [Abstract]
Allowance for Receivables from Customers and Notes Receivables [Policy Text Block]	Receivables from customers, net and notes receivable, net include an allowance for bad debts, which reflects the Company's best estimate of probable losses inherent in the receivables from customers and notes receivable. The Company provides for an allowance for doubtful accounts based on a specific-identification basis. The Company continually reviews its allowance for bad debts.

Commitments and Contingencies Commitments and Contingencies (Policies)	3 Months Ended
	Dec. 31, 2012
Commitments and Contingencies [Abstract]
Commitments and Contingencies, Policy [Policy Text Block]	Certain conditions may exist as of the date that the financial statements are issued, which may result in a loss to the Company but which will only be resolved when one or more future events occur or fail to occur. The Company assesses such contingent liabilities, and such assessment inherently involves an exercise of judgment. In assessing loss contingencies related to legal and regulatory proceedings that are pending against the Company or unasserted claims that may result in such proceedings, the Company's legal counsel evaluates the perceived merits of any legal and regulatory proceedings or unasserted claims as well as the perceived merits of the amount of relief sought or expected to be sought therein. If the assessment of a contingency indicates that it is probable that a material loss had been incurred at the date of the financial statements and the amount of the liability can be estimated, then the estimated liability would be accrued in the Company's financial statements. If the assessment indicates that a potentially material loss contingency is not probable, but is reasonably possible, or is probable but cannot be estimated, then the nature of the contingent liability, together with an estimate of the range of possible loss if determinable and material, would be disclosed. Neither accrual nor disclosure is required for loss contingencies that are deemed remote. The Company accrues legal fees related to contingent liabilities as they are incurred.

- Definition

Disclosure of accounting policy for commitments and contingencies, which may include policies for recognizing and measuring loss and gain contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 954
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=6491354&loc=d3e6052-115624

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2155897

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 450
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-URI http://asc.fasb.org/extlink&oid=6491354&loc=d3e6049-115624

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-HCO
-Paragraph 12, 13
-IssueDate 2006-05-01
-Chapter 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Technical Bulletin (FTB)
-Number 90-1
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 45
-Paragraph 11
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-Name FASB Interpretation (FIN)
-Number 45
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 45
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 45
-Paragraph 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 22
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 16: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 17: http://www.xbrl.org/2003/role/presentationRef
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-Name FASB Technical Bulletin (FTB)
-Number 90-1
-Paragraph 5
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 24
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 19: http://www.xbrl.org/2003/role/presentationRef
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Reference 20: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
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Reference 21: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Income Taxes Income Taxes (Policies)	3 Months Ended
Income Taxes Income Taxes (Policies)	Dec. 31, 2012
Income Taxes [Abstract]
Income Tax, Policy [Policy Text Block]	In determining the quarterly provision for income taxes, management uses an estimated annual effective tax rate which is based on the expected annual income and statutory tax rates in the various jurisdictions in which it operates. The Company’s effective tax rate differs from the U.S. statutory rate primarily due to state and local taxes, and differing statutory tax rates applied to the income of non-U.S. subsidiaries. The Company records the tax effect of certain discrete items, including the effects of changes in tax laws, tax rates and adjustments with respect to valuation allowances or other unusual or nonrecurring tax adjustments, in the interim period in which they occur, as an addition to, or reduction from, the income tax provision, rather than being included in the estimated effective annual income tax rate. In addition, jurisdictions with a projected loss for the year or a year-to-date loss where no tax benefit can be recognized are excluded from the estimated annual effective income tax rate. The Company is required to assess its deferred tax assets and the need for a valuation allowance at each reporting period. This assessment requires judgment on the part of management with respect to benefits that may be realized. The Company will record a valuation allowance against deferred tax assets when it is considered more likely than not that all or a portion of our deferred tax assets will not be realized.

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

+ References

+ Details

Earnings per Share Earnings Per Share (Tables)

3 Months Ended

Dec. 31, 2012

Note 2 – Earnings per Share [Abstract]

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

The following is a reconciliation of the numerator and denominator of the diluted net income (loss) per share computations for the periods presented below.



	Three Months Ended December 31,
(in millions, except share amounts)	2012			2011
Numerator:
Income (loss) from operations attributable to INTL FCStone Inc. stockholders	$	13.3		$	(0.4	)
Less: Allocation to participating securities	(0.5		)	—
Income (loss) from operations allocated to common stockholders	$	12.8		$	(0.4	)
Diluted net income (loss)	$	13.3		$	(0.4	)
Less: Allocation to participating securities	(0.5		)	—
Diluted net income (loss) allocated to common stockholders	$	12.8		$	(0.4	)
Denominator:
Weighted average number of:
Common shares outstanding	18,266,338			18,163,489
Dilutive potential common shares outstanding:
Share-based awards	512,337			—
Diluted weighted-average shares	18,778,675			18,163,489

Assets and Liabilities, at Fair Value Assets and Liabilities, at Fair Value (Tables)

3 Months Ended

Dec. 31, 2012

Assets and Liabilities, at Fair Value [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]



	December 31, 2012
(in millions)	Level 1		Level 2		Level 3		Netting and Collateral (1)			Total
Assets:
Money market funds	$	0.1	$	—	$	—	$	—		$	0.1
Certificate of deposits	6.4		—		—		—			6.4
Unrestricted cash equivalents	6.5		—		—		—			6.5
Commodities warehouse receipts	18.4		—		—		—			18.4
U.S. government obligations	—		23.0		—		—			23.0
Securities and other assets segregated under federal and other regulations	18.4		23.0		—		—			41.4
Money market funds	731.8		—		—		—			731.8
U.S. government obligations	—		701.2		—		—			701.2
Mortgage-backed securities	—		6.5		—		—			6.5
Derivatives	1,950.8		—		—		(1,960.1		)	(9.3		)
Deposits and receivables from exchange-clearing organizations	2,682.6		707.7		—		(1,960.1		)	1,430.2
Deposits and receivables from broker-dealers, clearing organizations and counterparties - derivatives	0.8		—		—		4.0			4.8
Common and preferred stock and American Depositary Receipts ("ADRs")	27.9		17.3		0.9		—			46.1
Exchangeable foreign ordinary equities and ADRs	18.2		—		—		—			18.2
Corporate and municipal bonds	—		—		3.6		—			3.6
U.S. government obligations	—		0.3		—		—			0.3
Foreign government obligations	11.2		—		—		—			11.2
Derivatives	192.9		604.3		—		(746.9		)	50.3
Commodities leases	—		45.1		—		(34.8		)	10.3
Commodities warehouse receipts	5.3		—		—		—			5.3
Exchange firm common stock	3.0		0.4		—		—			3.4
Mutual funds and other	2.4		—		—		—			2.4
Financial instruments owned	260.9		667.4		4.5		(781.7		)	151.1
Total assets at fair value	$	2,969.2	$	1,398.1	$	4.5	$	(2,737.8	)	$	1,634.0
Liabilities:
Accounts payable and other accrued liabilities - contingent liabilities	$	—	$	—	$	17.9	$	—		$	17.9
Payables to exchange-clearing organizations, broker-dealers and counterparties - derivatives	1,702.5		—		—		(1,702.5		)	—
Common and preferred stock and ADRs	40.3		14.9		—		—			55.2
Exchangeable foreign ordinary equities and ADRs	6.2		—		—		—			6.2
Derivatives	199.4		591.6		—		(754.2		)	36.8
Commodities leases	—		308.4		—		(219.1		)	89.3
Financial instruments sold, not yet purchased	245.9		914.9		—		(973.3		)	187.5
Total liabilities at fair value	$	1,948.4	$	914.9	$	17.9	$	(2,675.8	)	$	205.4


(1)	Represents cash collateral and the impact of netting across the levels of the fair value hierarchy. Netting among positions classified within the same level are included in that level.



	September 30, 2012
(in millions)	Level 1		Level 2		Level 3		Netting and Collateral (1)			Total
Assets:
Money market funds	$	0.1	$	—	$	—	$	—		$	0.1
Certificate of deposits	10.4		—		—		—			10.4
Unrestricted cash equivalents	10.5		—		—		—			10.5
Commodities warehouse receipts	22.3		—		—		—			22.3
U.S. government obligations	—		50.5		—		—			50.5
Securities and other assets segregated under federal and other regulations	22.3		50.5		—		—			72.8
Money market funds	335.1		—		—		—			335.1
U.S. government obligations	—		1,318.3		—		—			1,318.3
Mortgage-backed securities	—		7.0		—		—			7.0
Derivatives	3,344.3		—		—		(3,494.7		)	(150.4		)
Deposits and receivables from exchange-clearing organizations	3,679.4		1,325.3		—		(3,494.7		)	1,510.0
Deposits and receivables from broker-dealers, clearing organizations and counterparties - derivatives	0.7		5.0		—		(6.4		)	(0.7		)
Common and preferred stock and American Depositary Receipts ("ADRs")	17.8		5.6		0.9		—			24.3
Exchangeable foreign ordinary equities and ADRs	10.0		—		—		—			10.0
Corporate and municipal bonds	0.3		0.6		3.6		—			4.5
U.S. government obligations	—		0.3		—		—			0.3
Foreign government obligations	14.8		—		—		—			14.8
Derivatives	315.6		785.3		—		(1,047.0		)	53.9
Commodities leases	—		135.2		—		(93.1		)	42.1
Commodities warehouse receipts	7.5		—		—		—			7.5
Exchange firm common stock	3.4		9.0		—		—			12.4
Mutual funds and other	1.9		—		—		—			1.9
Financial instruments owned	371.3		936.0		4.5		(1,140.1		)	171.7
Total assets at fair value	$	4,084.2	$	2,316.8	$	4.5	$	(4,641.2	)	$	1,764.3
Liabilities:
Accounts payable and other accrued liabilities - contingent liabilities	$	—	$	—	$	14.8	$	—		$	14.8
Payables to exchange-clearing organizations, broker-dealers and counterparties - derivatives	3,562.3		—		—		(3,562.3		)	—
Common and preferred stock and ADRs	16.4		5.9		—		—			22.3
Exchangeable foreign ordinary equities and ADRs	5.7		—		—		—			5.7
Derivatives	338.1		775.2		—		(1,068.7		)	44.6
Commodities leases	—		220.0		—		(117.2		)	102.8
Financial instruments sold, not yet purchased	360.2		1,001.1		—		(1,185.9		)	175.4
Total liabilities at fair value	$	3,922.5	$	1,001.1	$	14.8	$	(4,748.2	)	$	190.2


(1)	Represents cash collateral and the impact of netting across the levels of the fair value hierarchy. Netting among positions classified within the same level are included in that level.

Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Information on Level 3 Financial Assets and Liabilities

The Company’s financial assets at fair value classified within level 3 of the fair value hierarchy as of December 31, 2012 and September 30, 2012 are summarized below:



(in millions)	December 31, 2012			September 30, 2012
Total level 3 assets	$	4.5		$	4.5
Level 3 assets for which the Company bears economic exposure	$	4.5		$	4.5
Total assets	$	2,939.6		$	2,958.9
Total financial assets at fair value	$	1,634.0		$	1,764.3
Total level 3 assets as a percentage of total assets	0.2		%	0.2		%
Level 3 assets for which the Company bears economic exposure as a percentage of total assets	0.2		%	0.2		%
Total level 3 assets as a percentage of total financial assets at fair value	0.3		%	0.3		%



	Level 3 Financial Assets and Financial Liabilities For the Three Months Ended December 31, 2012
(in millions)	Balances at beginning of period		Realized gains (losses) during period		Unrealized gains (losses) during period		Purchases/ issuances		Settlements			Transfers in or (out) of Level 3		Balances at end of period
Assets:
Common stock and ADRs	$	0.9	$	—	$	—	$	—	$	—		$	—	$	0.9
Corporate and municipal bonds	3.6		—		—		—		—			—		3.6
	$	4.5	$	—	$	—	$	—	$	—		$	—	$	4.5
Liabilities:
Contingent liabilities	$	14.8	$	—	$	0.3	$	3.1	$	(0.3	)	$	—	$	17.9



	Level 3 Financial Assets and Financial Liabilities For the Three Months Ended December 31, 2011
(in millions)	Balances at beginning of period		Realized gains (losses) during period		Unrealized gains (losses) during period			Settlements			Transfers in or (out) of Level 3		Balances at end of period
Assets:
Common stock and ADRs	$	1.1	$	—	$	—		$	—		$	—	$	1.1
Corporate and municipal bonds	3.6		—		(0.1		)	—			—		3.5
Mutual funds and other	0.4		—		—			—			—		0.4
	$	5.1	$	—	$	(0.1	)	$	—		$	—	$	5.0
Liabilities:
Contingent liabilities	$	22.3	$	—	$	0.9		$	(0.3	)	$	—	$	22.9

Available-for-sale Securities [Table Text Block]



December 31, 2012
Amounts included in deposits with and receivables from exchange-clearing organizations:
	Amortized Cost		Unrealized Holding ⁽¹⁾				Estimated Fair Value
(in millions)	Amortized Cost		Gains		(Losses)		Estimated Fair Value
U.S. government obligations	$	654.1	$	—	$	—	$	654.1
Mortgage-backed securities	6.4		0.1		—		6.5
	$	660.5	$	0.1	$	—	$	660.6


(1)	Unrealized gain/loss on U.S. government obligations as of December 31, 2012, is less than 0.1 million.



September 30, 2012
Amounts included in deposits with and receivables from exchange-clearing organizations:
	Amortized Cost		Unrealized Holding ⁽¹⁾				Estimated Fair Value
(in millions)	Amortized Cost		Gains		(Losses)		Estimated Fair Value
U.S. government obligations	$	1,298.9	$	—	$	—	$	1,298.9
Mortgage-backed securities	6.8		0.1		—		6.9
	$	1,305.7	$	0.1	$	—	$	1,305.8


(1)	Unrealized gain/loss on U.S. government obligations as of September 30, 2012, is less than 0.1 million.

As of December 31, 2012 and September 30, 2012, investments in debt securities classified as available-for-sale ("AFS") mature as follows:



December 31, 2012
	Due in				Estimated Fair Value
(in millions)	Less than 1 year		1 year or more		Estimated Fair Value
U.S. government obligations	$	654.1	$	—	$	654.1
Mortgage-backed securities	—		6.5		6.5
	$	654.1	$	6.5	$	660.6



September 30, 2012
	Due in				Estimated Fair Value
(in millions)	Less than 1 year		1 year or more		Estimated Fair Value
U.S. government obligations	$	1,298.9	$	—	$	1,298.9
Mortgage-backed securities	—		6.9		6.9
	$	1,298.9	$	6.9	$	1,305.8

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 19, 20, 21
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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-Name Emerging Issues Task Force (EITF)
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-Paragraph 21
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk (Tables)

3 Months Ended

Dec. 31, 2012

Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk [Abstract]

Schedule of Derivative Instruments [Table Text Block]



	December 31, 2012						September 30, 2012
(in millions)	Assets ⁽¹⁾			Liabilities ⁽¹⁾			Assets ⁽¹⁾			Liabilities ⁽¹⁾
Derivative contracts not accounted for as hedges:
Exchange-traded commodity derivatives	$	1,919.2		$	1,665.3		$	3,325.6		$	3,565.3
OTC commodity derivatives	454.7			472.1			823.6			841.4
Exchange-traded foreign exchange derivatives	46.5			40.6			63.0			47.7
OTC foreign exchange derivatives ⁽²⁾	309.2			289.9			215.4			196.6
Exchange-traded interest rate derivatives	1.2			4.4			0.9			2.6
OTC interest rate derivatives	1.1			—			1.6			—
Equity index derivatives	16.9			21.2			20.8			22.0
Gross fair value of derivative contracts	2,748.8			2,493.5			4,450.9			4,675.6
Impact of netting and collateral	(2,703.0		)	(2,456.7		)	(4,548.1		)	(4,631.0		)
Total fair value included in ‘Deposits and receivables from exchange-clearing organizations’	$	(9.3	)				$	(150.4	)
Total fair value included in 'Deposits and receivables from broker-dealers, clearing organizations and counterparties'	$	4.8					$	(0.7	)
Total fair value included in ‘Financial instruments owned, at fair value’	$	50.3					$	53.9
Fair value included in ‘Financial instruments sold, not yet purchased, at fair value’				$	36.8					$	44.6


(1)	As of December 31, 2012 and September 30, 2012, the Company’s derivative contract volume for open positions was approximately 3.1 million and 4.1 million contracts, respectively.


(2)	In accordance with agreements with counterparties, the Company is allowed to periodically take advances against its open trade fair value. There were no advances against open trade fair value outstanding as of December 31, 2012 and September 30, 2012.

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]



	Three Months Ended December 31,
(in millions)	2012		2011
Commodities	$	30.6	$	34.1
Foreign exchange	2.6		4.7
Interest rate	0.1		(1.0		)
Net gains (losses) from derivative contracts	$	33.3	$	37.8

- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

+ References + Details

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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+ Details

Physical Commodities Inventory Physical Commodities Inventory (Tables)

3 Months Ended

Dec. 31, 2012

Physical Commodities Inventory [Abstract]

Schedule of Inventory, Current [Table Text Block]

The carrying values of the Company’s inventory as of December 31, 2012 and September 30, 2012 are shown below.



(in millions)	December 31, 2012		September 30, 2012
Commodities in process	$	0.1	$	13.6
Finished commodities	133.8		118.0
Physical commodities inventory	$	133.9	$	131.6

Goodwill Goodwill (Tables)

3 Months Ended

Dec. 31, 2012

Goodwill [Abstract]

Schedule of Goodwill [Table Text Block]

The carrying value of goodwill by segment is as follows:



(in millions)	December 31, 2012		September 30, 2012
Commodity and Risk Management Services	$	32.0	$	32.0
Foreign Exchange	6.3		6.3
Securities	5.3		5.3
Goodwill	$	43.6	$	43.6

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References + Details

Intangible Assets Intangible Assets (Tables)

3 Months Ended

Dec. 31, 2012

Intangible Assets [Abstract]

Schedule of Finite and Indefinite-Lived Intangible Assets [Table Text Block]

The gross and net carrying values of intangible assets as of the balance sheet dates, by major intangible asset class are as follows:



	December 31, 2012							September 30, 2012
(in millions)	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Intangible assets subject to amortization
Noncompete agreement	$	3.7	$	(3.3	)	$	0.4	$	3.7	$	(3.0	)	$	0.7
Trade name	0.7		(0.6		)	0.1		0.7		(0.5		)	0.2
Software programs/platforms	2.2		(1.1		)	1.1		2.2		(1.0		)	1.2
Customer base	12.7		(1.9		)	10.8		9.6		(1.8		)	7.8
	19.3		(6.9		)	12.4		16.2		(6.3		)	9.9
Intangible assets not subject to amortization
Trade name	1.2		—			1.2		1.2		—			1.2
Total intangible assets	$	20.5	$	(6.9	)	$	13.6	$	17.4	$	(6.3	)	$	11.1

Schedule of Expected Amortization Expense [Table Text Block]

As of December 31, 2012, the estimated future amortization expense was as follows:



(in millions)
Fiscal 2013 (remaining nine months)	$	2.1
Fiscal 2014	1.7
Fiscal 2015	1.4
Fiscal 2016	1.0
Fiscal 2017	1.0
Fiscal 2018 and thereafter	5.2
	$	12.4

Other Expenses Other Expenses (Tables)

3 Months Ended

Dec. 31, 2012

Other Expenses [Abstract]

Schedule of Other Operating Cost and Expense, by Component [Table Text Block]

Other expenses for the three months ended December 31, 2012 and 2011 are comprised of the following:



	Three Months Ended December 31,
(in millions)	2012		2011
Business development	$	3.0	$	3.2
Contingent consideration, net⁽¹⁾	0.7		1.3
Insurance	0.5		0.4
Advertising, meetings and conferences	0.4		0.6
Non-trading hardware and software maintenance and software licensing	0.6		0.6
Office supplies and printing	0.3		0.3
Other non-income taxes	1.1		0.7
Other	2.6		1.8
	$	9.2	$	8.9

(1)

Credit Facilities Credit Facilities (Tables)

3 Months Ended

Dec. 31, 2012

Credit Facilities [Abstract]

Schedule of Debt [Table Text Block]

Credit facilities and outstanding borrowings as of December 31, 2012 and September 30, 2012 were as follows:



(in millions)					Amounts Outstanding
Borrower	Security	Renewal / Expiration Date	Total Commitment		December 31, 2012		September 30, 2012
INTL FCStone Inc.	Certain pledged shares	October 1, 2013	$	95.0	$	78.0	$	48.0
INTL Commodities	Certain commodities assets	April 30, 2013	140.0		107.0		107.0
FCStone, LLC	None	April 11, 2013	75.0		—		20.0
FCStone Merchants	Certain commodities assets	May 31, 2013	75.0		56.4		43.2
			$	385.0	$	241.4	$	218.2

Capital and Other Regulatory Requirements Capital and Other Regulatory Requirements (Tables)

3 Months Ended

Dec. 31, 2012

Capital and Other Regulatory Requirements [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]



(in millions)			As of December 31, 2012
Subsidiary	Regulatory Authority	Requirement Type	Actual		Minimum Requirement
FCStone, LLC	CFTC	Net capital	$	98.7	$	68.6
FCStone, LLC	CFTC	Segregated funds	$	1,574.7	$	1,550.6
FCStone, LLC	CFTC	Secured funds	$	74.1	$	62.5
INTL FCStone (Europe)	FSA	Net capital	$	43.0	$	21.4
INTL FCStone (Europe)	FSA	Segregated funds	$	90.6	$	88.5
INTL Global Currencies Limited	FSA	Net capital	$	19.4	$	0.5
TRX Futures Limited	FSA	Capital adequacy	$	8.2	$	3.0
INTL FCStone Securities Inc.	SEC	Net capital	$	2.0	$	1.0
FCC Investments, Inc.	SEC	Net capital	$	0.4	$	0.3
FCStone Australia	Australian Securities and Investment Commission	Net capital	$	2.0	$	1.0
FCStone Australia	New Zealand Clearing Ltd	Capital adequacy	$	11.5	$	0.8
FCStone Europe	Central Bank of Ireland	Net capital	$	2.0	$	0.5
INTL FCStone DTVM Ltda.	Brazilian Central Bank and Securities and Exchange Commission of Brazil	Capital adequacy	$	0.9	$	0.7

Stock-Based Compensation Stock-Based Compensation (Tables)

3 Months Ended

Dec. 31, 2012

Stock-Based Compensation [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Fair value is estimated at the grant date based on a Black-Scholes-Merton option-pricing model using the following weighted-average assumptions:



	Three Months Ended December 31, 2012
Expected stock price volatility	35%
Expected dividend yield	—%
Risk free interest rate	0.37%
Average expected life (in years)	2.88

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The following is a summary of stock option activity for the three months ended December 31, 2012:



	Shares Available for Grant		Number of Options Outstanding		Weighted Average Price		Weighted Average Grant Date Fair Value		Weighted Average Remaining Term (in years)	Aggregate Intrinsic Value ($ millions)
Balances as of September 30, 2012	921,412		1,890,634		$	23.36	$	11.11	5.45	$	6.0
Expiration of 2003 Plan	(828,321	)
Additional shares authorized	1,000,000
Granted	(100,000	)	100,000		$	17.92	$	4.31
Exercised			(25,667	)	$	7.10	$	3.27
Forfeited	6,666		(6,666	)	$	7.26	$	3.38
Expired	243		(243	)	$	15.02	$	6.67
Balances as of December 31, 2012	1,000,000		1,958,058		$	23.35	$	10.89	5.20	$	4.7
Exercisable as of December 31, 2012			831,845		$	24.07	$	10.07	2.32	$	3.4

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

The following is a summary of restricted stock activity through December 31, 2012:



	Shares Available for Grant		Number of Shares Outstanding		Weighted Average Grant Date Fair Value		Weighted Average Remaining Term (in years)	Aggregate Intrinsic Value ($ millions)
Balances as of September 30, 2012	1,420,114		512,124		$	22.09	1.81	$	9.8
Granted	(177,034	)	177,034		$	17.84
Vested			(157,408	)	$	20.85
Forfeited	47		(47	)	$	21.40
Balances as of December 31, 2012	1,243,127		531,703		$	21.04	2.30	$	9.3

Segment Analysis Segment Analysis (Tables)

3 Months Ended

Dec. 31, 2012

Segment Analysis [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Information concerning operations in these segments of business is shown in accordance with the Segment Reporting Topic of the ASC as follows:



	Three Months Ended December 31,
(in millions)	2012			2011
Total revenues:
Commodity and Risk Management Services	$	12,619.8		$	17,202.0
Foreign Exchange	16.2			17.9
Securities	12.9			9.9
Clearing and Execution Services	22.4			17.7
Other	39.5			45.2
Corporate unallocated	8.7			(2.3		)
Total	$	12,719.5		$	17,290.4
Operating revenues (loss):
Commodity and Risk Management Services	$	60.7		$	50.0
Foreign Exchange	16.2			17.9
Securities	12.9			9.9
Clearing and Execution Services	22.4			17.7
Other	4.8			3.1
Corporate unallocated	8.7			(2.3		)
Total	$	125.7		$	96.3
Net contribution:
(Revenues less cost of sales, clearing and related expenses, variable bonus compensation, introducing broker commissions and interest expense):
Commodity and Risk Management Services	$	40.5		$	29.8
Foreign Exchange	10.4			11.7
Securities	6.9			4.5
Clearing and Execution Services	3.6			2.5
Other	2.8			2.1
Total	$	64.2		$	50.6
Segment income (loss):
(Net contribution less non-variable direct segment costs):
Commodity and Risk Management Services	$	22.7		$	13.1
Foreign Exchange	7.1			9.0
Securities	3.2			1.1
Clearing and Execution Services	(0.9		)	(0.1		)
Other	1.9			0.8
Total	$	34.0		$	23.9
Reconciliation of segment income to income (loss) from operations, before tax:
Segment income	$	34.0		$	23.9
Costs not allocated to operating segments	15.2			24.6
Income (loss) from operations, before tax	$	18.8		$	(0.7	)

(in millions)	As of December 31, 2012			As of September 30, 2012
Total assets:
Commodity and Risk Management Services	$	1,422.1		$	1,449.2
Foreign Exchange	134.7			124.5
Securities	137.7			88.7
Clearing and Execution Services	1,032.4			1,090.9
Other	95.0			110.8
Corporate unallocated	117.7			94.8
Total	$	2,939.6		$	2,958.9

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References + Details

Basis of Presentation and Consolidation and Recently Issued Accounting Standards Basis of Presentation (Details)	3 Months Ended
	Dec. 31, 2012
Basis of Presentation and Consolidation (Reclassifications) [Abstract]
Number of different types of foreign currencies	130
Number of customers company-wide	20,000

Earnings per Share Earnings Per Share - Antidulitive Securities (Details) - shares	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Note 2 – Earnings per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,490,547	1,284,102

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Diluted Earnings Per Share
-URI http://asc.fasb.org/extlink&oid=6510752

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Contingent Stock Agreement
-URI http://asc.fasb.org/extlink&oid=6508534

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 13, 14
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Earnings per Share Earnings Per Share - EPS Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations Attributable to Parent	$ 13.3	$ (0.4)
Undistributed Earnings Allocated to Participating Securities - Continuing Ops	(0.5)	0.0
Income from continuing operations allocated to common stockholders	12.8	(0.4)
Net Income (Loss) Available to Common Stockholders, Diluted	13.3	(0.4)
Undistributed Earnings Allocated to Participating Securities	(0.5)	0.0
Diluted net income allocated to common stockholders	$ 12.8	$ (0.4)
Weighted Average Number of Shares Outstanding, Basic	18,266,338	18,163,489
Dilutive Securities, Effect on Basic Earnings Per Share [Abstract]
Stock Options And Warrants For Diluted Earnings Per Share Calculation	512,337	0
Diluted weighted-average shares	18,778,675	18,163,489

Assets and Liabilities, at Fair Value Assets and Liabilities, at Fair Value - Schedule of Financial Instruments Owned and Sold, Not Yet Purchased (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Security Owned and Sold, Not yet Purchased, at Fair Value [Line Items]
Derivative Liabilities	$ 36.8	$ 44.6

- Definition

Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

+ References + Details

Assets and Liabilities, at Fair Value Assets and Liabilities, at Fair Value - Details of Level 3 Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Assets and Liabilities, at Fair Value [Abstract]
Total Level 3 Assets	$ 4.5	$ 4.5
Level 3 assets for which the company bears economic exposure	4.5	4.5
Assets	2,939.6	2,958.9
Assets, Fair Value Disclosure	$ 1,634.0	$ 1,764.3
Total level 3 assets as a percentage of total assets	0.20%	0.20%
Level 3 assets for which the company bears economic exposure as a percertange of total assets	0.20%	0.20%
Total level 3 assets as a percentage of total financial assets at fair value	0.30%	0.30%

Assets and Liabilities, at Fair Value Assets and Liabilities, at Fair Value - Rollforward of Level 3 (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Rollforward of Level 3 Securities [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 4.5	$ 5.1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	0.0	(0.1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	4.5	5.0
Contingent Consideration [Member]
Rollforward of Level 3 Liabilities [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	14.8	22.3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease)	0.3	0.9
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	3.1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	(0.3)	(0.3)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	17.9	22.9
Common stock and American Depositary Receipts (ADRs) [Member]
Rollforward of Level 3 Securities [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0.9	1.1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0.9	1.1
Corporate Debt Securities [Member]
Rollforward of Level 3 Securities [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	3.6	3.6
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	0.0	(0.1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	3.6	3.5
Mutual funds and other [Member]
Rollforward of Level 3 Securities [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		0.4
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)		0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	$ 0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net		0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		$ 0.4

Assets and Liabilities, at Fair Value Assets and Liabilities, at Fair Value - Contingent Consideration (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Contingent Consideration [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease)	$ 0.3	$ 0.9

Assets and Liabilities, at Fair Value Assets and Liabilities, at Fair Value - Available for Sale Securities - Fin Inst (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	$ 660.5	$ 1,305.7
Available-for-sale Securities, Gross Unrealized Gains	0.1	0.1
Available-for-sale Securities, Gross Unrealized Losses	0.0	0.0
Available-for-sale Securities, Debt Securities	$ 660.6	$ 1,305.8

- Definition

Amount of debt securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=7534914&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-Subparagraph (b)-(g)
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 12
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 13
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 137
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15C
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 22
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Assets and Liabilities, at Fair Value Assets and Liabilities, at Fair Value - Available for Sale Securities - Dep and Rec (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	$ 660.5	$ 1,305.7
Available-for-sale Securities, Gross Unrealized Gains	0.1	0.1
Available-for-sale Securities, Gross Unrealized Losses	0.0	0.0
Available-for-sale Securities, Debt Securities	660.6	1,305.8
US Government Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	654.1	1,298.9
Available-for-sale Securities, Gross Unrealized Gains	0.0	0.0
Available-for-sale Securities, Gross Unrealized Losses	0.0	0.0
Available-for-sale Securities, Debt Securities	654.1	1,298.9
Collateralized Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	6.4	6.8
Available-for-sale Securities, Gross Unrealized Gains	0.1	0.1
Available-for-sale Securities, Gross Unrealized Losses	0.0	0.0
Available-for-sale Securities, Debt Securities	6.5	6.9
Deposits and Receivables from Exchange Clearing Organizations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Unrealized Gain (Loss)	0.1	0.1
Available-for-sale Securities, Debt Securities	$ 660.6	$ 1,305.8

- Definition

Amount of debt securities categorized neither as held-to-maturity nor trading.

+ References

+ Details

Assets and Liabilities, at Fair Value Assets and Liabilities, at Fair Value - Available for Sale Securities (Maturities) (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	$ 654.1	$ 1,298.9
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	6.5	6.9
Available-for-sale Securities, Debt Securities	660.6	1,305.8
US Government Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	654.1	1,298.9
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	0.0	0.0
Available-for-sale Securities, Debt Securities	654.1	1,298.9
Collateralized Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	0.0	0.0
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	6.5	6.9
Available-for-sale Securities, Debt Securities	$ 6.5	$ 6.9

- Definition

Amount of debt securities categorized neither as held-to-maturity nor trading.

+ References

+ Details

Assets and Liabilities, at Fair Value Assets and Liabilities, at Fair Value - Available for Sale Securities in OCI (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2012	Sep. 30, 2012
Assets and Liabilities, at Fair Value [Abstract]
Gain (Loss) on Sale of Exchange Shares	$ 0.9
Equity Investments in Exchange Stock - Cost	4.0
Equity Investments in Exchange Stock - Fair Value	3.4	$ 12.4
Proceeds from Sale of Available-for-sale Securities	8.6
Proceeds from Shares of Exchanges Sold	1.5
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax - LME Shares	6.3
Deferred Tax Liabilities, Accumulated Other Comprehensive Income - LME Shares	2.0
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax - Other Exchange Shares	0.4
Deferred Tax Assets, Accumulated Other Comprehensive Income - Other Exchange Shares	$ (0.2)

Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk - Obligations to Purchase Financial Instruments at a Future Date (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk [Abstract]
Financial Instruments Sold, Not yet Purchased, at Fair Value	$ 187.5	$ 175.4
Derivatives Liabilties	$ 36.8	$ 44.6

- Definition

+ References + Details

- Definition

Fair value of obligations incurred from short sales.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 320
-Section 35
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6475908&loc=d3e42429-110968

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-BRD
-Paragraph 2
-IssueDate 2006-05-01
-Chapter 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-BRD
-Paragraph 40
-IssueDate 2006-05-01
-Chapter 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-BRD
-Paragraph 38
-IssueDate 2006-05-01
-Chapter 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-BRD
-Paragraph 19
-IssueDate 2006-05-01
-Chapter 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk - Derivatives Volume (Details) number in Millions, $ in Millions	3 Months Ended
	Dec. 31, 2012 USD ($)	Sep. 30, 2012
Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk [Abstract]
Notional Amount of Interest Rate Derivatives	$ 625
Derivative, Average Remaining Maturity	4 months
Derivative, Number of Instruments Held	3.1	4.1

Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk - Gross Derivative Assets and Liabilities by Type and Balance Sheet Location (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 2,748.8	$ 4,450.9
Derivative Liability, Fair Value, Gross Liability	2,493.5	4,675.6
Derivative Asset, Fair Value, Amount Offset Against Collateral	(2,703.0)	(4,548.1)
Derivative Liability, Fair Value, Amount Offset Against Collateral	(2,456.7)	(4,631.0)
Exchange-traded Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1,919.2	3,325.6
Derivative Liability, Fair Value, Gross Liability	1,665.3	3,565.3
Over the Counter (OTC) Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	454.7	823.6
Derivative Liability, Fair Value, Gross Liability	472.1	841.4
Foreign Exchange Forward [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	46.5	63.0
Derivative Liability, Fair Value, Gross Liability	40.6	47.7
Over the Counter (OTC) Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	309.2	215.4
Derivative Liability, Fair Value, Gross Liability	289.9	196.6
Exchange-traded interest rate contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1.2	0.9
Derivative Liability, Fair Value, Gross Liability	4.4	2.6
Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1.1	1.6
Derivative Liability, Fair Value, Gross Liability	0.0	0.0
Equity Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	16.9	20.8
Derivative Liability, Fair Value, Gross Liability	21.2	22.0
Deposits and receivables from exchange clearing organizations [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	(9.3)	(150.4)
Deposits and receivables from broker-dealers, clearing organizations and counterparties [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	4.8	(0.7)
Financial instruments owned [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	50.3	53.9
Financial instrument sold, not yet purchased [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	$ 36.8	$ 44.6

Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk - Realized Gains/Losses on Derivative Contracts (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ 30.6	$ 34.1
Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	2.6	4.7
Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	0.1	(1.0)
Derivative [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ 33.3	$ 37.8

- Definition

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

+ References + Details

Receivables from customers and notes receivable, net Receivables from customers and notes receivable, net - Allowance for Customer Receivables (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Receivables from customers and notes receivable, net [Abstract]
Allowance for Doubtful Accounts Receivable	$ 1.3	$ 0.9

Receivables from customers and notes receivable, net Receivables from customers and notes receivable, net - Allowance for Notes Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Receivables from customers and notes receivable, net [Abstract]
Allowance Notes Receivable	$ 0.1	$ 0.1

Receivables from customers and notes receivable, net Exim Bank Notes Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Insured short-term notes receivable	$ 16.1	$ 10.2
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Short Term Notes Receivable Outstanding Balance Threshold, Percentage		90.00%
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Short Term Notes Receivable Outstanding Balance Threshold, Percentage		98.00%

Physical Commodities Inventory Physical Commodities Inventory - Inventory Serving as Collateral (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Physical Commodities Inventory [Abstract]
Inventory serving as collateral	$ 131.6	$ 129.1

Physical Commodities Inventory Physical Commodities Inventory - Physical Commodities Inventory by CIP and Finished (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Physical Commodities Inventory [Abstract]
Commodities in process	$ 0.1	$ 13.6
Finished commodities	133.8	118.0
Physical commodities inventory	$ 133.9	$ 131.6

Physical Commodities Inventory Physical Commodities Inventory - LCM Adjustments (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Note 6 – Physical Commodities Inventory [Abstract]
Inventory Adjustments	$ 1.0	$ 0.4

Goodwill Goodwill - Goodwill by Segment (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Goodwill [Line Items]
Goodwill	$ 43.6	$ 43.6
Commodity and Risk Management [Member]
Goodwill [Line Items]
Goodwill	32.0	32.0
Foreign Exchange [Member]
Goodwill [Line Items]
Goodwill	6.3	6.3
Securities [Member]
Goodwill [Line Items]
Goodwill	$ 5.3	$ 5.3

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 72
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-Clause 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph l
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Intangible Assets Intangible Assets - Gross and Net Intangible Assets by Major Class (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 19.3	$ 16.2
Finite-Lived Intangible Assets, Accumulated Amortization	(6.9)	(6.3)
Finite-Lived Intangible Assets, Net	12.4	9.9
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Noncompete Agreements, Gross	3.7	3.7
Finite-Lived Intangible Assets, Accumulated Amortization	(3.3)	(3.0)
Finite-Lived Intangible Assets, Net	0.4	0.7
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Trade Names, Gross	0.7	0.7
Finite-Lived Intangible Assets, Accumulated Amortization	(0.6)	(0.5)
Finite-Lived Intangible Assets, Net	0.1	0.2
Computer Software, Intangible Asset [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Computer Software, Gross	2.2	2.2
Finite-Lived Intangible Assets, Accumulated Amortization	(1.1)	(1.0)
Finite-Lived Intangible Assets, Net	1.1	1.2
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Customer Lists, Gross	12.7	9.6
Finite-Lived Intangible Assets, Accumulated Amortization	(1.9)	(1.8)
Finite-Lived Intangible Assets, Net	$ 10.8	$ 7.8

Intangible Assets Intangible Assets - Indefinite-Lived Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012
Indefinite-lived Intangible Assets [Line Items]
Gross Finite and Indefinite-Lived Intangible Assets	$ 20.5	$ 17.4
Finite and Indefinited-Lived Accumulated Amortization and Impairment Charges	(6.9)	(6.3)
Intangible Assets, Net (Excluding Goodwill)	13.6	11.1
Trade Names [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Trade Names	1.2	1.2
Indefinite-lived Intangible Assets, Impairment Losses	$ 0.0	$ 0.0

Intangible Assets Intangible Assets - Finite-Lived Intangible Assets Future Amortization Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012
Intangible Assets [Abstract]
Amortization of Intangible Assets	$ 0.6	$ 0.6
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Fiscal 2013, Remainder of Fiscal Year	2.1
Fiscal 2014	1.7
Fiscal 2015	1.4
Fiscal 2016	1.0
Fiscal 2017	1.0
Fiscal 2018 and thereafter	5.2
Finite-Lived Intangible Assets, Net	$ 12.4		$ 9.9

Other Expenses Other Expenses - Other Expenses Breakout (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Component of Operating Other Cost and Expense [Line Items]
Other Cost and Expense, Operating	$ 9.2	$ 8.9
Travel and Entertainment Expense [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Cost and Expense, Operating	3.0	3.2
Contingent Consideration [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Cost and Expense, Operating	0.7	1.3
Insurance Expense [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Cost and Expense, Operating	0.5	0.4
Advertising, Meetings and Conferences [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Cost and Expense, Operating	0.4	0.6
Non-trading hardware and software maintenance and software licensing [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Cost and Expense, Operating	0.6	0.6
Office supplies and printing [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Cost and Expense, Operating	0.3	0.3
Taxes Other than Income and Excise Taxes [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Cost and Expense, Operating	1.1	0.7
Other Operating Expense [Member]
Component of Operating Other Cost and Expense [Line Items]
Other Cost and Expense, Operating	$ 2.6	$ 1.8

Credit Facilities Credit Facilities - Number of Credit Facilities (Details)	Dec. 31, 2012
Credit Facilities [Abstract]
Number of credit facilities	4

Credit Facilities Credit Facilities (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Line of Credit Facility [Line Items]
Line of Credit Facility, Amount Outstanding	$ 241.4	$ 218.2
Main line of credit facilities [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	385.0
HCO Syndicated line of credit facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	95.0
Line of Credit Facility, Amount Outstanding	78.0	48.0
INTL COM line of credit facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	140.0
Line of Credit Facility, Amount Outstanding	107.0	107.0
FCS Margin line of credit facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	75.0
Line of Credit Facility, Amount Outstanding	0.0	20.0
FMS Sub-note commodity line of credit facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	75.0
Line of Credit Facility, Amount Outstanding	$ 56.4	$ 43.2

Commitments and Contingencies Commitments and Contingencies - Contingencies and Litigation (Details)	3 Months Ended
	Dec. 31, 2012 USD ($)
Sentinel Appeal Cash Deposit	$ 8,000,000
Excess segregated funds invested	21,900,000
Loss Contingency, Loss in Period	1,500,000
Loss Contingency, Settlement Agreement, Consideration	250,000
Pre and Post Transfers of Funds related to Sentinel	15,500,000
Customer Segregated Transfers of Funds Pursuant to Safe Harbor	1,100,000
Excess segregated funds returned	15,500,000
Minimum [Member]
Excess segregated funds returned	4,000,000
Maximum [Member]
Excess segregated funds returned	$ 6,000,000

Commitments and Contingencies Commitments and Contingencies - Contigent Consideration for Acquisitions (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Jul. 31, 2010
Business Acquisition, Contingent Consideration [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 3.4	$ 0.9
Hencorp Acquisition [Member]
Business Acquisition, Contingent Consideration [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	0.1
Business Acquisition, Contingent Consideration, at Fair Value	2.5
Hanley Group Acquisition [Member]
Business Acquisition, Contingent Consideration [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	0.2
Business Acquisition, Contingent Consideration, at Fair Value	$ 9.5
Contingent payments equal to a % of the forecasted adjusted earnings before interest and taxes	15.00%
RMI-RMC Acquistion [Member]
Business Acquisition, Contingent Consideration [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 0.1
Business Acquisition, Contingent Consideration, at Fair Value	3.0
Tradewire Acquisition [Member] [Member]
Business Acquisition, Contingent Consideration [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Amortizable Intangibles	3.1
Hencorp Acquisition [Member]
Business Acquisition, Contingent Consideration [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price	6.6
Hanley Group Acquisition [Member]
Business Acquisition, Contingent Consideration [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price	53.7
Business Acquisition, Contingent Consideration, Potential Cash Payment, Year One			$ 10.0
RMI-RMC Acquistion [Member]
Business Acquisition, Contingent Consideration [Line Items]
Business Acquisition, Cost of Acquired Entity, Purchase Price	15.2
Coffee Network Acquisition [Member]
Business Acquisition, Contingent Consideration [Line Items]
Business Combination, Consideration Transferred	0.3
Business Acquisition, Contingent Consideration, at Fair Value	$ 0.1

Capital and Other Regulatory Requirements Capital and Other Regulatory Requirements - Regulatory Capital Requirements (Details) $ in Millions	Dec. 31, 2012 USD ($)
Cash and Securities Segregated under Commodity Exchange Act Regulation	$ 1,574.7
Cash and Securities Segregated under Commodity Exchange Act Regulation, Amount Required to be Segregated	1,550.6
Secured Funds	74.1
Secured Funds Required Under Commodity Exchange Act	62.5
FCStone LLC [Member]
Net Capital under Commodity Exchange Act Computation	98.7
Required Net Capital under Commodity Exchange Act	68.6
INTL FCStone Europe [Member]
Net Capital under Commodity Exchange Act Computation	43.0
Required Net Capital under Commodity Exchange Act	21.4
Net Capital	90.6
Cash and Securities Segregated under Commodity Exchange Act Regulation	88.5
INTL Global Currencies [Member]
Net Capital under Commodity Exchange Act Computation	19.4
Required Net Capital under Commodity Exchange Act	0.5
TRX Futures [Member]
Net Capital	8.2
Capital Required for Capital Adequacy	3.0
INTL FCStone Securities [Member]
Net Capital	2.0
Minimum Net Capital Required for Entity	1.0
FCC Investments [Member]
Net Capital	0.4
Minimum Net Capital Required for Entity	0.3
FCStone Australia [Member]
Net Capital under Commodity Exchange Act Computation	2.0
Required Net Capital under Commodity Exchange Act	1.0
Net Capital	11.5
Capital Required for Capital Adequacy	0.8
FCStone Europe [Member]
Net Capital under Commodity Exchange Act Computation	2.0
Required Net Capital under Commodity Exchange Act	0.5
INTL FCStone DTVM Ltda [Member]
Net Capital	0.0
Capital Required for Capital Adequacy	$ 0.0

Stock-Based Compensation Stock-Based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Note 13 – Stock-Based Compensation [Abstract]
Allocated Share-based Compensation Expense	$ 1.6	$ 1.0

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References + Details

Stock-Based Compensation Stock-Based Compensation - Stock Option Plan (Details) - shares	3 Months Ended
	Dec. 31, 2012	Sep. 30, 2012
Stock-Based Compensation [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	1,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	1,000,000	921,412

Stock-Based Compensation Stock-Based Compensation - Stock Option Plan Fair Value Weighted-Average Assumptions (Details)	3 Months Ended
	Dec. 31, 2012
Stock-Based Compensation [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	35.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.37%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	2 years 321 days

Stock-Based Compensation Stock-Based Compensation - Stock Based Compensation Table (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	921,412
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1,890,634
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	1,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	(100,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease)	100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	(25,667)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	6,666
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period	(6,666)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period, Net	243
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	(243)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	1,000,000		921,412
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1,958,058		1,890,634
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	831,845
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 23.35		$ 23.36
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	17.92
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	7.10
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	7.26
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price	15.02
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	24.07
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Grant Date Fair Value	10.89		$ 11.11
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	4.31
Share-based Compensation Arrangement by Share-based Payment Award, Options, Excrecises in Period, Weighted Average Grant Date Fair Value	3.27
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeited in Period, Weighted Average Grant Date Fair Value	3.38
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expired in Period, Weighted Average Grant Date Fair Value	6.67
Share-based Compensation Arrangement by Share-based Payment Award, Options, Excercisable, Weighted Average Grant Date Fair Value	$ 10.07
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	5 years 73 days		5 years 164 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	2 years 117 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 4.7		$ 6.0
Expiration of 2003 Plan	(828,321)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 3.4
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options	$ 11.5
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	6 years 120 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	$ 0.5	$ 0.3

Stock-Based Compensation Stock-Based Compensation - Restricted Stock Plan (Details) - shares	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012
Stock-Based Compensation [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	1,243,127	1,420,114

Stock-Based Compensation Stock-Based Compensation - Restricted Stock Plan Table (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted	1,243,127	1,420,114
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	512,124
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Period Increase (Decrease)	(177,034)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	177,034
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	(157,408)
ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted	1,243,127	1,420,114
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	531,703	512,124
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 21.04	$ 22.09
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	17.84
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 20.85
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	2 years 109 days	1 year 296 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value	$ 9,300,000	$ 9,800,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 9.7
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition - Restricted Stock	2 years 109 days
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures	47
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(47)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 21.40

Acquisitions Acquisitions (Details) $ in Millions	Dec. 31, 2012 USD ($)
Tradewire Acquisition [Member] [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Amortizable Intangibles	$ 3.1

Income Taxes Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Income Taxes Income Taxes (Details) - USD ($) $ in Millions	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]
Income Tax Expense (Benefit)	$ 5.5	$ (0.2)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	29.00%	29.00%

Segment Analysis Segment Analysis - Reportable Segments (Details)	3 Months Ended
	Dec. 31, 2012
Segment Analysis [Abstract]
Number of different types of foreign currencies	130

Segment Analysis Segment Analysis (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012
Segment Reporting Information [Line Items]
Revenues	$ 12,719.5	$ 17,290.4
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	18.8	(0.7)
Costs not allocated	15.2	24.6
Net Segment Income	34.0	23.9
Gross Profit	125.7	96.3
Net Contribution	64.2	50.6
Assets	2,939.6		$ 2,958.9
Commodity and Risk Management [Member]
Segment Reporting Information [Line Items]
Revenues	12,619.8	17,202.0
Net Segment Income	22.7	13.1
Gross Profit	60.7	50.0
Net Contribution	40.5	29.8
Assets	1,422.1		1,449.2
Foreign Exchange Segment [Member]
Segment Reporting Information [Line Items]
Revenues	16.2	17.9
Net Segment Income	7.1	9.0
Gross Profit	16.2	17.9
Net Contribution	10.4	11.7
Assets	134.7		124.5
Securities Segment [Member]
Segment Reporting Information [Line Items]
Revenues	12.9	9.9
Net Segment Income	3.2	1.1
Gross Profit	12.9	9.9
Net Contribution	6.9	4.5
Assets	137.7		88.7
Clearing and Execution Services Segment [Member]
Segment Reporting Information [Line Items]
Revenues	22.4	17.7
Net Segment Income	(0.9)	(0.1)
Gross Profit	22.4	17.7
Net Contribution	3.6	2.5
Assets	1,032.4		1,090.9
Other Segment [Member]
Segment Reporting Information [Line Items]
Revenues	39.5	45.2
Net Segment Income	1.9	0.8
Gross Profit	4.8	3.1
Net Contribution	2.8	2.1
Assets	95.0		110.8
Corporate [Member]
Segment Reporting Information [Line Items]
Revenues	8.7	(2.3)
Gross Profit	8.7	$ (2.3)
Assets	$ 117.7		$ 94.8

Commodity and Other Repurchase Agreements Commodity and Other Repurchase Agreements (Details) - USD ($) $ in Millions	Dec. 31, 2012	Sep. 30, 2012
Assets Sold under Agreements to Repurchase [Line Items]
Financing Receivables, net - Sales/Repurchase Agreements	$ 66.7	$ 92.5
Broker-dealers, Clearing Organizations and Counterparties [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Obligations outstanding related to commodities sold under repurchase agreements	4.1	37.0
Lenders Under Loans [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Obligations outstanding related to commodities sold under repurchase agreements	$ 56.4	$ 43.2