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DEI - shares	3 Months Ended
DEI - shares	Dec. 31, 2014	Feb. 05, 2015
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, 2014
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		18,866,126
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
ASSETS
Cash and cash equivalents	$ 278.2	$ 231.3
Cash, securities and other assets segregated under federal and other regulations (including $314.2 and $15.3 at fair value at December 31, 2014 and September 30, 2014, respectively)	647.4	448.0
Deposits and receivables from:
Exchange-clearing organizations (including $1,060.6 and $1,255.4 at fair value at December 31, 2014 and September 30, 2014, respectively)	1,575.4	1,731.4
Broker-dealers, clearing organizations and counterparties (including $(5.6) and $(1.1) at fair value at December 31, 2014 and September 30, 2014, respectively)	132.4	123.0
Receivables from customers, net	63.6	55.6
Notes receivable, net	75.2	65.2
Income taxes receivable	12.7	10.8
Financial instruments owned, at fair value	159.9	197.9
Physical commodities inventory	45.1	40.0
Deferred income taxes, net	30.0	32.0
Property and equipment, net	15.2	15.9
Goodwill and intangible assets, net	57.6	58.0
Other assets	34.5	30.6
Total assets	3,127.2	3,039.7
Liabilities:
Accounts payable and other accrued liabilities (including $2.2 and $5.5 at fair value at December 31, 2014 and September 30, 2014, respectively)	90.8	114.1
Payables to:
Customers	2,325.5	2,228.7
Broker-dealers, clearing organizations and counterparties	24.7	11.9
Lenders under loans	49.1	22.5
Senior unsecured notes	45.5	45.5
Income taxes payable	9.6	7.6
Financial instruments sold, not yet purchased, at fair value	227.0	264.0
Total liabilities	2,772.2	2,694.3
Commitments and contingencies (Note 11)
Stockholders' Equity:
Preferred stock, $.01 par value. Authorized 1,000,000 shares; no shares issued or outstanding	0.0	0.0
Common stock, $0.01 par value. Authorized 30,000,000 shares; 20,021,232 issued and 19,003,750 outstanding at December 31, 2014 and 19,826,635 issued and 18,883,662 outstanding at September 30, 2014	0.2	0.2
Common stock in treasury, at cost - 1,017,482 shares at December 31, 2014 and 942,973 shares at September 30, 2014, respectively	(19.0)	(17.5)
Additional paid-in capital	230.5	229.6
Retained earnings	154.1	144.7
Accumulated other comprehensive loss, net	(10.8)	(11.6)
Total stockholders' equity	355.0	345.4
Total liabilities and equity	$ 3,127.2	$ 3,039.7

Condensed Consolidated Balance Sheets Parentheticals - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Balance Sheet Parentheticals [Abstract]
Securities and other assets segregated, fair value	$ 314.2	$ 15.3
Dep and rec -exch clear org - fair value	1,060.3	1,255.4
Dep and rec -b/d - fair value	(5.6)	(1.1)
Accounts pay and other accrued - fair value	$ 2.2	$ 5.5
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	20,021,232	19,826,635
Common stock - outstanding	19,003,750	18,883,662
Treasury stock - shares	1,017,482	942,973

Condensed Consolidated Income Statements - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Revenues:
Sales of physical commodities	$ 13,494.3	$ 7,801.2
Trading gains, net	70.3	51.7
Commission and clearing fees	49.5	42.2
Consulting and management fees	10.4	12.0
Interest income	3.1	1.4
Other income	0.1	0.2
Total revenues	13,627.7	7,908.7
Cost of sales of physical commodities	13,490.2	7,795.8
Operating revenues	137.5	112.9
Transaction-based clearing expenses	29.4	25.2
Introducing broker commissions	12.2	11.6
Interest expense	2.7	2.7
Net operating revenues	93.2	73.4
Compensation and other expenses:
Compensation and benefits	56.4	46.3
Communication and data services	6.7	6.2
Occupancy and equipment rental	3.1	3.0
Professional fees	3.3	4.3
Travel and business development	2.8	2.8
Depreciation and amortization	1.9	1.9
Bad debts and impairments	0.0	0.3
Other	5.4	4.7
Total compensation and other expenses	79.6	69.5
Income from continuing operations, before tax	13.6	3.9
Income tax expense	4.2	1.5
Net income from continuing operations	9.4	2.4
Income from discontinued operations, net of tax	0.0	0.1
Net income	$ 9.4	$ 2.5
Basic earnings per share:
Income from continuing operations	$ 0.50	$ 0.13
Income from discontinued operations	0.00	0.00
Net income per common share	0.50	0.13
Diluted earnings per share:
Income from continuing operations	0.49	0.12
Income from discontinued operations	0.00	0.00
Net income per common share	$ 0.49	$ 0.12
Weighted-average number of common shares outstanding:
Basic	18,515,528	18,657,678
Diluted	18,762,029	19,358,442

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Condensed Consolidated Statement of Other Comprehensive Income (Loss) [Abstract]
Net income	$ 9.4	$ 2.5
Other comprehensive income (loss), net of tax:
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(0.3)	(1.2)
Net unrealized gain on available-for-sale securities	1.1	0.2
Periodic pension costs (included in compensation and benefits)	0.0	0.1
Reclassification adjustment for gains included in net income	0.0	0.1
Other comprehensive loss	0.8	(0.9)
Comprehensive income	$ 10.2	$ 1.6

Condensed Consolidated Cash Flows Statements - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 9.4	$ 2.5
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	1.9	1.8
Provision for bad debts and impairments	0.0	0.5
Deferred income taxes	1.4	(3.2)
Amortization of debt issuance costs and debt discount	0.2	0.3
Amortization of stock-based compensation	0.9	1.1
Loss on sale of property and equipment	0.0	0.2
Changes in operating assets and liabilities, net:
Cash, securities and other assets segregated under federal and other regulations	(202.7)	233.3
Deposits and receivables from exchange-clearing organizations	155.4	(129.8)
Deposits and receivables from broker-dealers, clearing organizations, and counterparties	(10.1)	4.8
Receivable from customers, net	(8.0)	18.3
Notes receivable from customers, net	(10.0)	(8.9)
Income taxes receivable	(1.9)	1.6
Financial instruments owned, at fair value	38.4	(11.9)
Physical commodities inventory	(5.1)	32.4
Other assets	(4.2)	2.4
Accounts payable and other accrued liabilities	(22.2)	(14.3)
Payable to customers	104.1	(107.4)
Payable to broker-dealers, clearing organizations and counterparties	12.8	(13.4)
Income taxes payable	2.1	0.9
Financial instruments sold, not yet purchased, at fair value	(37.0)	31.4
Net cash (used in) provided by operating activities	25.4	42.6
Cash flows from investing activities:
Purchase of property and equipment	(0.9)	(1.3)
Net cash (used in) provided by investing activities	(0.9)	(1.3)
Cash flows from financing activities:
Net change in payable to lenders under loans	26.6	(0.8)
Payments related to earn-outs on acquisitions	(1.6)	(0.3)
Debt issuance costs	(0.1)	(0.3)
Exercise of stock options	1.4	0.5
Repurchase of stock	(2.4)	(1.3)
Net cash provided by (used in) financing activities	23.9	(2.2)
Effect of exchange rates on cash and cash equivalents	(1.5)	(0.3)
Net decrease in cash and cash equivalents	46.9	38.8
Cash and cash equivalents at beginning of period	231.3	156.1
Cash and cash equivalents at end of period	278.2	194.9
Supplemental disclosure of cash flow information:
Cash paid for interest	2.3	2.6
Income taxes paid, net of cash refunds	2.6	1.5
Supplemental disclosure of non-cash investing and financing activities:
Additional consideration payable related to acquisitions, net	0.1	0.2
Payable related to repurchase of stock	$ 0.5	$ 0.0

Condensed Consolidated Statement of Stockholders' Equity - 3 months ended Dec. 31, 2014 - USD ($) $ in Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Balances as of beginning of period at Sep. 30, 2014	$ 345.4	$ 0.2	$ (17.5)	$ 229.6	$ 144.7	$ (11.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9.4				9.4
Other comprehensive loss	0.8					0.8
Excercise of stock options				1.4
Share-based Compensation	0.9			0.9
Repurchase of stock - Treasury Stock			1.5
Repurchase of stock	(2.9)			1.4
Balances as of end of period at Dec. 31, 2014	$ 355.0	$ 0.2	$ (19.0)	$ 230.5	$ 154.1	$ (10.8)

Basis of Presentation and Consolidation and Recently Issued Accounting Standards (Notes)	3 Months Ended
	Dec. 31, 2014
Basis of Presentation and Consolidation [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 diversified, global financial services organization providing financial products and advisory and execution services to help clients access market liquidity, maximize profits and manage risk. 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 metals and select other commodities; trading of more than 150 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 accounts, representing approximately 11,000 consolidated clients 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, 2014, 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, 2014 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, self-insurance liabilities, 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. Reclassifications Certain amounts previously reported in the condensed consolidated income statements have been reclassified to conform to the current period presentation. For all periods and amounts presented, reclassifications have been made for discontinued operations. See Note 18 – Discontinued Operations. Beginning with the Company’s report on Form 10-Q for the three months ended March 31, 2014 filed with the SEC, the Company reorganized its reportable segments. All segment information has been revised to reflect the business reorganization for all periods and amounts presented. See Note 19 – Segment Analysis. Recent Accounting Pronouncements In March 2013, the FASB issued ASU 2013-05, Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity, which addresses the accounting for the cumulative translation adjustment when a parent either sells part or all of its investment in a foreign entity or no longer holds a controlling financial interest in a subsidiary or group of assets that is a nonprofit activity or a business within a foreign entity. For public entities, the ASU is effective prospectively for fiscal years, and interim periods, within those years, beginning after December 15, 2013. The Company adopted this guidance starting with the first quarter ended December 31, 2014. The adoption of this guidance did not have a material impact on the Company’s condensed consolidated financial statements. In July 2013, the FASB issued ASU 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This ASU provides that an unrecognized tax benefit, or a portion thereof, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except to the extent that a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date to settle any additional income taxes that would result from disallowance of a tax position, or the tax law does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, then the unrecognized tax benefit should be presented as a liability. For public entities, the ASU is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013. The Company adopted this guidance starting with the first quarter ended December 31, 2014. The adoption of this guidance did not have a material impact on the Company’s condensed consolidated financial statements. In April 2014, the FASB issued ASU 2014-08, Presentation of Financial Statements: Reporting Discontinued Operations, which updated guidance on reporting discontinued operations and disclosures of disposals of components of an entity. Under the amendment only those disposals of components of an entity that represent a strategic shift that has (or will have) a major effect on an entity’s operations and financial results will be reported as discontinued operations in the financial statements. Next, the elimination of the component's operations, cash flows and significant continuing involvement conditions have been removed. Lastly, an equity method investment could be reported as discontinued operations. The updated guidance is effective prospectively for all disposals or classifications as held for sale that occur within annual periods beginning after December 15, 2014. The Company expects to adopt this guidance starting with the first quarter of fiscal year 2016. The Company does not expect the adoption of this guidance to have a material impact on the condensed consolidated financial statements. On May 28, 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. For public entities, the ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. Early application is not permitted. The Company expects to adopt this guidance starting with the first quarter of fiscal year 2018. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on its condensed consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting. In June 2014, the FASB issued ASU 2014-11, Transfers and Servicing: Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures, which changes the accounting for repurchase-to-maturity transactions to secured borrowing accounting. Additionally, for repurchase financing arrangements, the amendments of this ASU require separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty, which will result in secured borrowing accounting for the repurchase agreement. For public entities, the ASU is effective for the first interim or annual period beginning after December 15, 2014. Earlier application is not permitted. The Company expects to adopt this guidance starting with the second quarter of fiscal year 2015. The Company does not expect the adoption of this guidance to have a material impact on the condensed consolidated financial statements. In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements - Going Concern: Disclosures of Uncertainties about an Entity’s Ability to Continue as a Going Concern, which requires management to evaluate whether there are conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the financial statements are issued or are available to be issued. This ASU also requires management to disclose certain information depending on the results of the going concern evaluation. The provisions of this ASU are effective for annual periods ending after December 15, 2016, and for interim and annual periods thereafter. Early adoption is permitted. This amendment is applicable to the Company beginning in the first quarter of fiscal year 2018. The adoption of this standard is not expected to have a material impact on the condensed consolidated financial statements. In January 2015, the FASB issued ASU No. 2015-01, Income Statement - Extraordinary and Unusual Items: Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items, which eliminates from U.S. GAAP the concept of extraordinary items. The ASU retains and expands the existing presentation and disclosure guidance for items that are unusual in nature or occur infrequently to also include items that are both unusual in nature and infrequently occurring. The provisions of this ASU are effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. Early adoption is permitted, provided that presentation applied to the beginning of the fiscal year of adoption. This amendment is applicable to the Company beginning in the first quarter of 2018. The adoption of this standard is not expected to have a material impact on the condensed consolidated financial statements.

Earnings per Share (Notes)

3 Months Ended

Dec. 31, 2014

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 per share computations for the periods presented below.



	Three Months Ended December 31,
(in millions, except share amounts)	2014			2013
Numerator:
Income from continuing operations	$	9.4		$	2.4
Less: Allocation to participating securities	(0.2		)	(0.1		)
Income from continuing operations allocated to common stockholders	$	9.2		$	2.3
(Loss) income from discontinued operations	$	—		$	0.1
Less: Allocation to participating securities	—			—
(Loss) income from discontinued operations allocated to common stockholders	$	—		$	0.1
Diluted net income	$	9.4		$	2.5
Less: Allocation to participating securities	(0.2		)	(0.1		)
Diluted net income allocated to common stockholders	$	9.2		$	2.4
Denominator:
Weighted average number of:
Common shares outstanding	18,515,528			18,657,678
Dilutive potential common shares outstanding:
Share-based awards	246,501			700,764
Diluted weighted-average shares	18,762,029			19,358,442

The dilutive effect of share-based awards is reflected in diluted net income 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 Accounting Standards Codification (“ASC”).

Options to purchase 1,264,770 and 1,126,282 shares of common stock for the three months ended December 31, 2014 and 2013, respectively, were excluded from the calculation of diluted earnings per share because they would have been anti-dilutive.

Assets and Liabilities, at Fair Value (Notes)

3 Months Ended

Dec. 31, 2014

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 in 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 payable 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. The carrying value of receivables from customers, net and notes receivable, net approximates fair value, given their short duration. Payables to lenders under loans carry variable rates of interest and thus approximate fair value. The fair value of the Company’s senior unsecured notes is estimated to be $46.4 million (carrying value of $45.5 million) as of December 31, 2014, based on the transaction prices at public exchanges for this issuance.

The fair value estimates presented in the condensed consolidated financial statements are based on pertinent information available to management as of December 31, 2014 and September 30, 2014. 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 condensed consolidated financial statements since that date and current estimates of fair value may differ significantly from the amounts presented in the condensed consolidated 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 in 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, 2014. 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, 2014 and September 30, 2014 by level in the fair value hierarchy. There were no assets or liabilities that were measured at fair value on a nonrecurring basis as of December 31, 2014 and September 30, 2014.



	December 31, 2014
(in millions)	Level 1		Level 2		Level 3		Netting and Collateral (1)			Total
Assets:
Unrestricted cash equivalents - certificate of deposits	$	1.0	$	—	$	—	$	—		$	1.0
Commodities warehouse receipts	14.5		—		—		—			14.5
U.S. government obligations	—		299.7		—		—			299.7
Securities and other assets segregated under federal and other regulations	14.5		299.7		—		—			314.2
Money market funds	692.4		—		—		—			692.4
U.S. government obligations	—		702.8		—		—			702.8
Derivatives	6,694.6		—		—		(7,029.2		)	(334.6		)
Deposits and receivables from exchange-clearing organizations	7,387.0		702.8		—		(7,029.2		)	1,060.6
Deposits and receivables from broker-dealers, clearing organizations and counterparties - derivatives	408.9		—		—		(414.5		)	(5.6		)
Common and preferred stock and American Depositary Receipts (“ADRs”)	68.8		4.0		0.6		—			73.4
Exchangeable foreign ordinary equities and ADRs	14.0		—		—		—			14.0
Corporate and municipal bonds	7.3		4.6		3.5		—			15.4
U.S. government obligations	—		0.3		—		—			0.3
Foreign government obligations	—		10.0		—		—			10.0
Derivatives	146.5		1,708.5		—		(1,819.1		)	35.9
Commodities leases	—		61.5		—		(59.9		)	1.6
Commodities warehouse receipts	1.3		—		—		—			1.3
Exchange firm common stock	5.3		—		—		—			5.3
Mutual funds and other	2.7		—		—		—			2.7
Financial instruments owned	245.9		1,788.9		4.1		(1,879.0		)	159.9
Total assets at fair value	$	8,057.3	$	2,791.4	$	4.1	$	(9,322.7	)	$	1,530.1
Liabilities:
Accounts payable and other accrued liabilities - contingent liabilities	$	—	$	—	$	2.2	$	—		$	2.2
Payable to customers - derivatives	7,027.5		—		—		(7,027.5		)	—
Common and preferred stock and ADRs	70.9		3.2		—		—			74.1
Exchangeable foreign ordinary equities and ADRs	5.4		—		—		—			5.4
Corporate and municipal bonds	0.1		—		—		—			0.1
Derivatives	131.0		1,659.4		—		(1,710.1		)	80.3
Commodities leases	—		168.9		—		(101.8		)	67.1
Financial instruments sold, not yet purchased	207.4		1,831.5		—		(1,811.9		)	227.0
Total liabilities at fair value	$	7,234.9	$	1,831.5	$	2.2	$	(8,839.4	)	$	229.2


(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 is included in that level.



	September 30, 2014
(in millions)	Level 1		Level 2		Level 3		Netting and Collateral (1)			Total
Assets:
Unrestricted cash equivalents - certificates of deposits	$	1.5	$	—	$	—	$	—		$	1.5
Commodities warehouse receipts	14.8		—		—		—			14.8
U.S. government obligations	—		0.5		—		—			0.5
Securities and other assets segregated under federal and other regulations	14.8		0.5		—		—			15.3
Money market funds	826.8		—		—		—			826.8
U.S. government obligations	—		702.5		—		—			702.5
Derivatives	3,397.1		—		—		(3,671.0		)	(273.9		)
Deposits and receivables from exchange-clearing organizations	4,223.9		702.5		—		(3,671.0		)	1,255.4
Deposits and receivables from broker-dealers, clearing organizations and counterparties - derivatives	549.0		—		—		(550.1		)	(1.1		)
Common and preferred stock and American Depositary Receipts (“ADRs”)	66.8		15.0		0.7		—			82.5
Exchangeable foreign ordinary equities and ADRs	27.2		—		—		—			27.2
Corporate and municipal bonds	7.1		9.0		3.6		—			19.7
U.S. government obligations	—		0.3		—		—			0.3
Foreign government obligations	—		10.7		—		—			10.7
Derivatives	332.4		2,328.3		—		(2,616.4		)	44.3
Commodities leases	—		60.1		—		(58.0		)	2.1
Commodities warehouse receipts	3.6		—		—		—			3.6
Exchange firm common stock	4.8		—		—		—			4.8
Mutual funds and other	2.7		—		—		—			2.7
Financial instruments owned	444.6		2,423.4		4.3		(2,674.4		)	197.9
Total assets at fair value	$	5,233.8	$	3,126.4	$	4.3	$	(6,895.5	)	$	1,469.0
Liabilities:
Accounts payable and other accrued liabilities - contingent liabilities	$	—	$	—	$	5.5	$	—		$	5.5
Payable to customers - derivatives	3,469.8		—		—		(3,469.8		)	—
Common and preferred stock and ADRs	92.8		2.6		—		—			95.4
Exchangeable foreign ordinary equities and ADRs	5.8		—		—		—			5.8
Corporate and municipal bonds	2.8		—		—		—			2.8
Derivatives	327.0		2,257.7		—		(2,500.3		)	84.4
Commodities leases	—		176.0		—		(100.4		)	75.6
Financial instruments sold, not yet purchased	428.4		2,436.3		—		(2,600.7		)	264.0
Total liabilities at fair value	$	3,898.2	$	2,436.3	$	5.5	$	(6,070.5	)	$	269.5


(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 is included in that level.

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

Information on Level 3 Financial Assets and Liabilities

The Company’s financial assets at fair value classified in level 3 of the fair value hierarchy as of December 31, 2014 and September 30, 2014 are summarized below:



(in millions)	December 31, 2014			September 30, 2014
Total level 3 assets	$	4.1		$	4.3
Level 3 assets for which the Company bears economic exposure	$	4.1		$	4.3
Total assets	$	3,127.2		$	3,039.7
Total financial assets at fair value	$	1,530.1		$	1,469.0
Total level 3 assets as a percentage of total assets	0.1		%	0.1		%
Level 3 assets for which the Company bears economic exposure as a percentage of total assets	0.1		%	0.1		%
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, 2014 and 2013, 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, 2014.



	Level 3 Financial Assets and Financial Liabilities For the Three Months Ended December 31, 2014
(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	$	0.7	$	—	$	(0.1	)	$	—	$	—		$	—	$	0.6
Corporate and municipal bonds	3.6		—		(0.1		)	—		—			—		3.5
	$	4.3	$	—	$	(0.2	)	$	—	$	—		$	—	$	4.1

	Balances at beginning of period		Realized gains (losses) during period		Remeasurement gains (losses) during period			Acquisitions		Settlements			Transfers in or (out) of Level 3		Balances at end of period
Liabilities:
Contingent liabilities	$	5.5	$	—	$	0.1		$	—	$	(3.4	)	$	—	$	2.2



	Level 3 Financial Assets and Financial Liabilities For the Three Months Ended December 31, 2013
(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	$	0.7	$	—	$	—		$	—	$	—		$	—	$	0.7
Corporate and municipal bonds	3.5		—		(0.1		)	—		—			—		3.4
	$	4.2	$	—	$	(0.1	)	$	—	$	—		$	—	$	4.1

	Balances at beginning of period		Realized gains (losses) during period		Remeasurement gains (losses) during period			Acquisitions		Settlements			Transfers in or (out) of Level 3		Balances at end of period
Liabilities:
Contingent liabilities	$	9.6	$	—	$	0.2		$	—	$	(0.7	)	$	—	$	9.1

In accordance with the Fair Value Measurements Topic of the ASC, the Company has estimated on a recurring basis each period the fair value of debentures issued by a single asset owning company of Suriwongse Hotel located in Chiang Mai, Thailand. As of December 31, 2014, the Company’s investment in the hotel is $3.5 million, and included within the corporate and municipal bonds classification in the level 3 financial assets and financial liabilities tables. 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. There has been no significant change in the fair value of the debentures, and no additional loss has been recognized during the three months ended December 31, 2014 and 2013.

The Company is required to make additional future cash payments based on certain financial performance measures of its acquired businesses. During the three months ended December 31, 2014, the Company paid $3.4 million, related to the final balance of contingent liability for the Hencorp acquisition.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 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 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, 2014, certain acquisitions have had changes in the estimates of undiscounted cash flows, based on actual performances fluctuating from estimates. The fair value of the contingent consideration increased $0.1 million and $0.2 million during the three months ended December 31, 2014 and 2013, respectively, with the corresponding amount classified as ‘other expense’ in 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 during the three months ended December 31, 2014.

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 other comprehensive income (“OCI”) until realized. As of December 31, 2014, the cost and fair value of all the equity investments in exchange firms was $3.7 million and $5.3 million, respectively. As of September 30, 2014, the cost and fair value of the equity investments in exchange firms was $3.7 million and $4.8 million, respectively.

The Company recorded unrealized gains of $1.7 million, net of income tax expense of $1.0 million as of December 31, 2014, and unrealized gains of $0.7 million, net of income tax expense of $0.4 million as of September 30, 2014, in OCI related to U.S. government obligations, mortgage-backed securities and the remaining equity investments in exchange firms classified as available-for-sale securities.

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, 2014 and September 30, 2014:



December 31, 2014
Amounts included in deposits with and receivables from exchange-clearing organizations and securities segregated:
	Amortized Cost		Unrealized Holding				Estimated Fair Value
(in millions)	Amortized Cost		Gains		(Losses)		Estimated Fair Value
U.S. government obligations	$	967.8	$	1.2	$	—	$	969.0



September 30, 2014
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	$	666.8	$	—	$	—	$	666.8

(1) Unrealized gain/loss on U.S. government obligations as of September 30, 2014, was less than $0.1 million.

As of December 31, 2014 and September 30, 2014, investments in debt securities classified as available-for-sale (“AFS”) mature as follows:



December 31, 2014
	Due in				Estimated Fair Value
(in millions)	Less than 1 year		1 year or more		Estimated Fair Value
U.S. government obligations	$	389.7	$	579.3	$	969.0



September 30, 2014
	Due in				Estimated Fair Value
(in millions)	Less than 1 year		1 year or more		Estimated Fair Value
U.S. government obligations	$	287.6	$	379.2	$	666.8

There were no sales of AFS securities during the three months ended December 31, 2014 and 2013, and as a result, no realized gains or losses were recorded for the three months ended December 31, 2014 and 2013.

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.

- 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 + Details

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

3 Months Ended

Dec. 31, 2014

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, 2014 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, 2014. The total of $227.0 million as of December 31, 2014 includes $80.3 million for derivative contracts, which represents a liability to the Company based on their fair values as of December 31, 2014.

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 in ‘financial instruments owned, at fair value’, ‘deposits and receivables from exchange-clearing organizations’ and ‘financial instruments sold, not yet purchased, at fair value’.

Listed below are the fair values of the Company’s derivative assets and liabilities as of December 31, 2014 and September 30, 2014. Assets represent net unrealized gains and liabilities represent net unrealized losses.



	December 31, 2014						September 30, 2014
(in millions)	Assets ⁽¹⁾			Liabilities ⁽¹⁾			Assets ⁽¹⁾			Liabilities ⁽¹⁾
Derivative contracts not accounted for as hedges:
Exchange-traded commodity derivatives	$	6,546.2		$	6,401.7		$	3,777.7		$	3,255.4
OTC commodity derivatives	1,291.3			1,191.5			1,852.3			1,842.9
Exchange-traded foreign exchange derivatives	28.4			23.3			93.5			90.2
OTC foreign exchange derivatives	969.4			1,010.5			808.0			741.8
Exchange-traded interest rate derivatives	100.7			115.2			13.4			10.2
Equity index derivatives	22.5			75.7			61.9			114.0
Gross fair value of derivative contracts	8,958.5			8,817.9			6,606.8			6,054.5
Impact of netting and collateral	(9,262.8		)	(8,737.6		)	(6,837.5		)	(5,970.1		)
Total fair value included in ‘Deposits and receivables from exchange-clearing organizations’	$	(334.6	)				$	(273.9	)
Total fair value included in ‘Deposits and receivables from broker-dealers, clearing organizations and counterparties’	$	(5.6	)				$	(1.1	)
Total fair value included in ‘Financial instruments owned, at fair value’	$	35.9					$	44.3
Fair value included in ‘Financial instruments sold, not yet purchased, at fair value’				$	80.3					$	84.4


(1)	As of December 31, 2014 and September 30, 2014, the Company’s derivative contract volume for open positions were approximately 4.0 million and 4.5 million contracts, respectively.

The Company’s derivative contracts are principally held in its Commercial Hedging segment. The Company assists its Commercial Hedging 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 Commercial Hedging 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, 2014 and 2013, in accordance with the Derivatives and Hedging Topic of the ASC. The gains (losses) set forth below are included in ‘trading gains, net’ and ‘income (loss) from discontinued operations, net of tax’ in the condensed consolidated income statements.



	Three Months Ended December 31,
(in millions)	2014		2013
Commodities	$	25.2	$	8.7
Foreign exchange	2.2		2.1
Net gains (losses) from derivative contracts	$	27.4	$	10.8

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, 2014 and September 30, 2014 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 derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

+ References

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

Receivables From Customers, Net and Notes Receivable, Net (Notes)	3 Months Ended
	Dec. 31, 2014
Receivables from customers and notes receivable, net [Abstract]
Financing Receivables [Text Block]	Receivables From Customers, Net 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 $5.7 million as of December 31, 2014 and September 30, 2014. The allowance for doubtful accounts related to notes receivable was $0.1 million as of December 31, 2014 and September 30, 2014. 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 $37.7 million and $33.8 million as of December 31, 2014 and September 30, 2014, respectively. The Company has sold $32.6 million and $25.8 million of the insured portion of the notes through non-recourse participation agreements with other third parties as of December 31, 2014 and September 30, 2014, respectively. See discussion of notes receivable related to commodity repurchase agreements in Note 10.

Physical Commodities Inventory (Notes)	3 Months Ended
Physical Commodities Inventory (Notes)	Dec. 31, 2014
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. The carrying values of the Company’s inventory, which consist of all finished commodities inventory, are $45.1 million and $40.0 million as of December 31, 2014 and September 30, 2014, respectively. As a result of the declining market prices of certain commodities, the Company has recorded LCM adjustments for physical commodities inventory of $0.8 million and $1.0 million as of December 31, 2014 and September 30, 2014, respectively. The adjustments are included in ‘cost of sales of physical commodities’ in the condensed consolidated income statements.

Goodwill (Notes)

3 Months Ended

Dec. 31, 2014

Goodwill [Abstract]

Goodwill Disclosure [Text Block]

Goodwill

The carrying value of goodwill is allocated to the Company’s operating segment as follows:



(in millions)	December 31, 2014		September 30, 2014
Commercial Hedging	$	30.7	$	30.7
Global Payments	6.3		6.3
Physical Commodities	2.4		2.4
Securities	8.1		8.1
Goodwill	$	47.5	$	47.5

Intangible Assets - (Notes)

3 Months Ended

Dec. 31, 2014

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, 2014							September 30, 2014
(in millions)	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Intangible assets subject to amortization
Software programs/platforms	$	2.2	$	(2.0	)	$	0.2	$	2.2	$	(1.9	)	$	0.3
Customer base	12.9		(4.1		)	8.8		12.9		(3.8		)	9.1
	15.1		(6.1		)	9.0		15.1		(5.7		)	9.4
Intangible assets not subject to amortization
Trade name	1.1		—			1.1		1.1		—			1.1
Total intangible assets	$	16.2	$	(6.1	)	$	10.1	$	16.2	$	(5.7	)	$	10.5

Amortization expense related to intangible assets was $0.4 million and $0.3 million for the three months ended December 31, 2014 and 2013, respectively.

As of December 31, 2014, the estimated future amortization expense was as follows:



(in millions)
Fiscal 2015 (remaining nine months)	$	0.9
Fiscal 2016	0.7
Fiscal 2017	0.7
Fiscal 2018	0.7
Fiscal 2019 and thereafter	6.0
	$	9.0

Credit Facilities (Notes)

3 Months Ended

Dec. 31, 2014

Credit Facilities [Abstract]

Debt Disclosure [Text Block]

Credit Facilities

Variable-Rate Credit Facilities

The Company has four committed credit facilities under which the Company and its subsidiaries may borrow up to $270.0 million, subject to the terms and conditions for these facilities. The amounts outstanding under these credit facilities are short term borrowings and carry variable rates of interest, thus approximating fair value. The Company’s credit facilities consist of the following:


•	$140.0 million facility available to INTL FCStone Inc. for general working capital requirements.


•	$75.0 million facility available to the Company’s wholly owned subsidiary, FCStone, LLC, for short-term funding of margin to commodity exchanges. The facility is subject to annual review and guaranteed by INTL FCStone Inc.


•	$30.0 million facility available to the Company’s wholly owned subsidiary, FCStone Merchant Services, LLC, for financing traditional commodity financing arrangements and commodity repurchase agreements. The facility is subject to annual review and is guaranteed by INTL FCStone Inc.


•	$25.0 million facility available to the Company’s wholly owned subsidiary, INTL FCStone Ltd, for short-term funding of margin to commodity exchanges. The facility is subject to annual review and is guaranteed by INTL FCStone Inc.

Senior Unsecured Notes

In July 2013, the Company completed the offering of $45.5 million aggregate principal amount of the Company’s 8.5% Senior Notes due 2020 (the “Notes”). The net proceeds of the sale of the Notes are being used for general corporate purposes. The Notes bear interest at a rate of 8.5% per year (payable quarterly on January 30, April 30, July 30 and October 30 of each year). The Notes mature on July 30, 2020. The Company may redeem the Notes, in whole or in part, at any time on and after July 30, 2016, at a redemption price equal to 100% of the principal amount redeemed plus accrued and unpaid interest to, but not including, the redemption date. The Company incurred debt issuance costs of $1.7 million in connection with the issuance of the Notes, which are being amortized over the term of the Notes.

The following table sets forth a listing of credit facilities, the committed amounts as of December 31, 2014 on the facilities, and outstanding borrowings on the facilities as well as indebtedness on senior notes as of December 31, 2014 and September 30, 2014:



(in millions)
Credit Facilities						Amounts Outstanding
	Borrower	Security	Renewal / Expiration Date	Total Commitment		December 31, 2014		September 30, 2014
	INTL FCStone Inc.	Pledged shares of certain subsidiaries	September 20, 2016	$	140.0	$	31.0	$	15.0
	FCStone, LLC	None	April 9, 2015	75.0		—		—
	FCStone Merchants	Certain commodities assets	May 1, 2015	30.0		18.1		7.5
	INTL FCStone, Ltd.	None	November 5, 2015	25.0		—		—
				$	270.0	$	49.1	$	22.5
Senior Unsecured Notes
	8.50% senior notes, due July 30, 2020					45.5		45.5
Total indebtedness						$	94.6	$	68.0

As shown above, $130 million of the Company’s committed credit facilities are scheduled to expire during the next twelve months. The Company intends to renew or replace these facilities as they expire, and based on the Company’s liquidity position and capital structure, the Company believes it will be able to do so.

The Company’s credit facility agreements contain financial covenants relating to financial measures on a consolidated basis, as well as on a certain stand-alone subsidiary basis, including minimum tangible net worth, minimum regulatory capital, minimum net unencumbered liquid assets, maximum net loss, minimum fixed charge coverage ratio and maximum funded debt to net worth ratio. Failure to comply with these covenants could result in the debt becoming payable on demand. As of December 31, 2014, the Company was in compliance with all of its financial covenants under its credit facilities.

Commodity and Other Repurchase Agreements (Notes)	3 Months Ended
Commodity and Other Repurchase Agreements (Notes)	Dec. 31, 2014
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 sale/repurchase agreements, under which 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, 2014 and September 30, 2014 were $31.0 million and $20.6 million, respectively. The obligations outstanding related to commodities sold under repurchase agreements that are recorded in ‘lenders under loans’ as of December 31, 2014 and September 30, 2014 were $18.1 million and $7.5 million, respectively.

Commitments and Contingencies (Notes)	3 Months Ended
Commitments and Contingencies (Notes)	Dec. 31, 2014
Commitments and Contingencies [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Commitments and Contingencies 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 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. Our assessments are based on estimates and assumptions that have been deemed reasonable by management, but that may later prove to be incomplete or inaccurate, and unanticipated events and circumstances may occur that might cause us to change those estimates and assumptions. 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 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, 2014 and September 30, 2014, the condensed consolidated balance sheets include loss contingency accruals recorded prior to these periods then ended, which are not material, individually or in the aggregate, to the Company’s financial position or liquidity. In the opinion of management, possible exposure from loss contingencies in excess of the amounts accrued, and in addition to the possible losses discussed below, is not likely to be 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 In January 2014, a purported class action was filed in the United States District Court for the Southern District of New York against the Company and certain of its officers and directors. The complaint alleges violations of federal securities laws, and claims that the Company has issued false and misleading information concerning the Company’s business and prospects. The action seeks unspecified damages on behalf of persons who purchased the Company’s shares between February 17, 2010 and December 16, 2013. The lead plaintiff’s amended complaint was filed in June 2014. The Company’s motion to dismiss the complaint was filed in July 2014. At the court hearing on February 4, 2015, the Company’s motion was granted and the plaintiff’s amended complaint was dismissed. The plaintiff has until March 6, 2015 to amend its complaint. The Company has determined that losses related to this matter are not probable. Because the matter is in the early stages of litigation and no discovery has been commenced, together with the inherent difficulty of predicting the outcome of litigation generally, the Company does not have sufficient information to determine the amount or range of reasonably possible loss with respect to these matters. The Company believes the case is without merit and intends to defend itself vigorously. The Company’s Directors’ and Officers’ insurance policy is expected to cover any liability and litigation costs in excess of the $0.5 million policy retention amount. 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. In aggregate, $15.5 million of FCStone, LLC’s $21.9 million in invested funds were returned to it before and after Sentinel’s bankruptcy petition. 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 sought 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 sought recovery of pre- and post-petition transfers totaling approximately $15.5 million. 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. On March 19, 2014, the appeal court ruled in favor of FCStone, LLC. In April 2014, the trustee filed a petition for rehearing of the appeal. In May 2014, the U.S. Court of Appeals for the Seventh Circuit denied the petition. The trustee did not file a writ for certiorari with the U.S. Supreme Court during the time allowed to do so. The Company continues to be involved in litigation against the trustee to recover its share of the cash held in reserve accounts under Sentinel’s Fourth Amended Chapter 11 Plan of Liquidation. 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 of $2.2 million and $5.5 million are included in ‘accounts payable and other accrued liabilities’ in the condensed consolidated balance sheets as of December 31, 2014 and September 30, 2014. 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 change in fair value during the three months ended December 31, 2014 and 2013 were increases of $0.1 million and $0.2 million, respectively, and are included in ‘other’ in the consolidated income statements. The Company has a contingent liability relating to the December 2012 acquisition of the accounts of Tradewire Securities, 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 three annual periods and a six month period, after the third annual period, following the closing of the acquisition, for a total of four payments, with a discount rate being applied to those future payments. The present value of the estimated total purchase price, including contingent consideration, is $3.4 million as of December 31, 2014, of which $1.9 million remains outstanding and is included in ‘accounts payable and other accrued liabilities’ in the consolidated balance sheet. The Company recorded a contingent liability relating to the April 2014 acquisition of Forward Insight Commodities 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 twelve-month period following the closing of the acquisition. The estimated total purchase price, including contingent consideration, was $0.5 million, of which $0.3 million remains outstanding as of December 31, 2014, and is included in ‘accounts payable and other accrued liabilities’ in the 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. Self-Insurance On January 1, 2014, the Company entered into a program to self-insure its costs related to medical and dental claims. The Company is self-insured, up to a stop loss amount, for eligible participating employees and retirees, and for qualified dependent medical and dental claims, subject to deductibles and limitations. Liabilities are recognized based on claims filed and an estimate of claims incurred but not reported. The Company has purchased stop-loss coverage to limit its exposure on a per claim basis and in aggregate in the event that aggregated actual claims would exceed 120% of actuarially estimated claims. The Company is insured for covered costs in excess of these limits. Although the ultimate outcome of these matters may exceed the amounts recorded and additional losses may be incurred, the Company does not believe that any additional potential exposure for such liabilities will have a material adverse effect on the Company’s condensed consolidated financial position or results of operations. As of December 31, 2014, the Company had $0.6 million accrued for self-insured medical and dental claims included in ‘accounts payable and other liabilities’ in the condensed consolidated balance sheet.

Capital and Other Regulatory Requirements (Notes)

3 Months Ended

Dec. 31, 2014

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 were in compliance with all of their regulatory requirements as of December 31, 2014, as follows:



(in millions)			As of December 31, 2014
Subsidiary	Regulatory Authority	Requirement Type	Actual		Minimum Requirement
FCStone, LLC	CFTC	Net capital	$	121.3	$	67.0
FCStone, LLC	CFTC	Segregated funds	$	1,824.5	$	1,783.9
FCStone, LLC	CFTC	Secured funds	$	83.6	$	64.8
INTL FCStone Ltd	FCA (United Kingdom)	Net capital	$	83.4	$	56.6
INTL FCStone Ltd	FCA (United Kingdom)	Segregated funds	$	117.9	$	117.9
INTL FCStone Securities Inc.	SEC	Net capital	$	3.4	$	1.0
FCC Investments, Inc.	SEC	Net capital	$	0.3	$	0.3
FCStone Australia	Australian Securities and Investment Commission	Net capital	$	1.5	$	0.8
FCStone Australia	Australian Securities and Investment Commission	Segregated funds	$	25.2	$	21.4
FCStone Australia	New Zealand Clearing Ltd	Capital adequacy	$	11.4	$	3.9
INTL FCStone DTVM Ltda.	Brazilian Central Bank and Securities and Exchange Commission of Brazil	Capital adequacy	$	3.1	$	0.6
Gainvest S.A. Sociedad Gerente de FCI	Comision Nacional de Valores	Capital adequacy	$	4.7	$	0.2
Gainvest S.A. Sociedad Gerente de FCI	Comision Nacional de Valores	Net capital	$	0.7	$	0.1
INTL Capital S.A.	General Inspector of Justice (Argentina)	Net capital	$	10.6	$	7.0
INTL CIBSA S.A.	Comision Nacional de Valores	Capital adequacy	$	3.3	$	1.8
INTL CIBSA S.A	Comision Nacional de Valores	Net capital	$	3.9	$	0.9

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, 2014, 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1C
-URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958572-112826

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1E
-URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958574-112826

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1H
-URI http://asc.fasb.org/extlink&oid=7881181&loc=d3e65071-112826

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958569-112826

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958570-112826

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1F
-URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958575-112826

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958568-112826

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1D
-URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958573-112826

+ Details

Share-Based Compensation (Notes)

3 Months Ended

Dec. 31, 2014

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

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

Share-Based Compensation

Share-based compensation expense is included in ‘compensation and benefits’ in the condensed consolidated income statements and totaled $0.9 million and $1.1 million for the three months ended December 31, 2014 and 2013, respectively.

Stock Option Plan

The Company sponsors a stock option plan for its directors, officers, employees and consultants. The 2013 Stock Option Plan, which was approved by the Company’s Board of Directors and shareholders, authorizes the Company to issue stock options covering up to 1.0 million shares of the Company’s common stock. As of December 31, 2014, there were 0.9 million shares available for future grant under this plan. Awards that expire or are forfeit generally become available for issuance again under the plan. The Company settles stock option exercises with newly issued shares of common stock.

The following is a summary of stock option activity for the three months ended December 31, 2014:



	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, 2014	913,500	1,578,056		$	25.38	$	11.58	4.16	$	1.9
Granted	—	—		$	—	$	—
Exercised	—	(190,398	)	$	7.52	$	3.40
Forfeited	—	—		$	—	$	—
Expired	—	(39,389	)	$	23.41	$	11.60
Balances as of December 31, 2014	913,500	1,348,269		$	27.96	$	12.74	4.58	$	0.7
Exercisable as of December 31, 2014		459,620		$	33.98	$	13.42	1.48	$	0.5

The total compensation cost not yet recognized for non-vested awards of $7.4 million as of December 31, 2014 has a weighted-average period of 5.19 years over which the compensation expense is expected to be recognized. Compensation expense is amortized on a straight-line basis over the vesting period. The total intrinsic value of options exercised during the three months ended December 31, 2014 and 2013 was $2.2 million and $0.6 million, respectively.

Restricted Stock Plan

The Company sponsors a restricted stock plan for its directors, officers and employees. As of December 31, 2014, 1.0 million shares were authorized for future grant under the 2012 Restricted Stock Plan. Awards that are forfeit 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 for the three months ended December 31, 2014:



	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, 2014	1,096,325		229,851		$	20.03	1.79	$	4.0
Granted	(83,923	)	83,923		$	18.37
Vested	—		(72,268	)	$	22.23
Forfeited	328		(328	)	$	18.12
Balances as of December 31, 2014	1,012,730		241,178		$	18.80	2.49	$	5.0

The total compensation cost not yet recognized of $3.6 million as of December 31, 2014 has a weighted-average period of 2.49 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.

Other Expenses (Notes)

3 Months Ended

Dec. 31, 2014

Other Expenses [Abstract]

Other Expenses [Text Block]

Other Expenses

Other expenses for the three months ended December 31, 2014 and 2013 consisted of the following:



	Three Months Ended December 31,
(in millions)	2014		2013
Contingent consideration, net	$	0.1	$	0.2
Insurance	0.5		0.5
Advertising, meetings and conferences	0.6		0.4
Non-trading hardware and software maintenance and software licensing	1.2		0.7
Office supplies and printing	0.3		0.3
Other clearing related expenses	0.4		0.4
Other non-income taxes	1.0		1.0
Other	1.3		1.2
Total other expenses	$	5.4	$	4.7

Accumulated Other Comprehensive Income (Loss) (Notes)

3 Months Ended

Dec. 31, 2014

Accumulated Other Comprehensive Income (Loss) [Abstract]

Comprehensive Income (Loss) Note [Text Block]

Accumulated Other Comprehensive Income (Loss)

Comprehensive income consists of net income and other gains and losses affecting stockholders’ equity that, under U.S. GAAP, are excluded from net income. Other comprehensive income (loss) includes net actuarial losses from defined benefit pension plans, unrealized gains on available-for-sale securities, and gains and losses on foreign currency translations.

The following table summarizes the changes in accumulated other comprehensive income (loss) for the three months ended December 31, 2014.



(in millions)	Foreign Currency Translation Adjustment			Pension Benefits Adjustment			Unrealized Gain or Loss on Available-for-Sale Securities			Accumulated Other Comprehensive Loss
Balances as of September 30, 2014	$	(8.7	)	$	(3.5	)	$	0.6		$	(11.6	)
Other comprehensive income (loss), net of tax before reclassifications	(0.3		)	—			1.1			0.8
Amounts reclassified from AOCI, net of tax	—			—			—		⁽¹⁾	—
Net current period other comprehensive income (loss), net of tax	(0.3		)	—			1.1			0.8
Balances as of December 31, 2014	$	(9.0	)	$	(3.5	)	$	1.7		$	(10.8	)

(1) Amounts reclassified from OCI for the three months ended December 31, 2014 were less than $0.1 million.

- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6522872

+ Details

Income Taxes (Notes)	3 Months Ended
Income Taxes (Notes)	Dec. 31, 2014
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 the deferred tax assets will not be realized. The valuation allowance for deferred tax assets as of December 31, 2014 and September 30, 2014 was $2.8 million. The valuation allowances as of December 31, 2014 and September 30, 2014 were primarily related to U.S. state and local and foreign net operating loss carryforwards that, in the judgment of management, are not more likely than not to be realized. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some or all of the deferred tax assets will not be realized. The Company incurred U.S. federal, state, and local taxable losses for the years ended September 30, 2014, 2013, and 2012 of $17.3 million, $24.5 million, and $21.9 million, respectively. There are no significant differences between actual levels of past taxable income and the results of operations, before income taxes in these jurisdictions. When evaluating if U.S. federal, state, and local deferred tax assets are realizable, the Company considered deferred tax liabilities of $3.9 million that are scheduled to reverse from 2015 to 2019 and $1.3 million of deferred tax liabilities associated with unrealized gains in securities which the Company could sell, if necessary. Furthermore, the Company considered its ability to implement business and tax planning strategies that would allow the remaining U.S. federal, state, and local deferred tax assets, net of valuation allowances, to be realized within approximately 8 years. Based on the tax planning strategies that are prudent and feasible, management believes that it is more likely than not that the Company will realize the tax benefit of the deferred tax assets, net of the existing valuation allowance, in the future. However, the realization of deferred income taxes is dependent on future events, and changes in estimate in future periods could result in adjustments to the valuation allowance. The income tax expense from continuing operations of $4.2 million and $1.5 million for the three months ended December 31, 2014 and 2013, respectively, reflect estimated federal, foreign and state taxes. For the three months ended December 31, 2014, the Company’s effective tax rate was 31% compared to 38% for the three months ended December 31, 2013. The Company and its subsidiaries file income tax returns with the U.S. federal jurisdiction and various state and foreign jurisdictions. The Company has open tax years ranging from September 30, 2008 through September 30, 2014 with U.S. federal and state and local taxing authorities. In the U.K., the Company has open tax years ending September 30, 2013 to September 30, 2014. In Brazil, the Company has open tax years ranging from December 31, 2009 through December 31, 2014. In Argentina, the Company has open tax years ranging from December 31, 2007 to September 30, 2014. INTL FCStone settled a state examination in the three months ended December 31, 2014 with no material adjustments.

Acquisitions (Notes)	3 Months Ended
Acquisitions (Notes)	Dec. 31, 2014
Acquisitions [Abstract]
Business Combination Disclosure [Text Block]	Acquisitions G.X. Clarke & Co. Effective January 1, 2015, the Company completed its acquisition of G.X. Clarke & Co, an SEC registered institutional dealer in fixed income securities. G.X. Clarke & Co. is based in New Jersey, transacts in U.S. treasuries, federal agency and mortgage-backed securities, and is a FINRA member with an institutional client base consisting of asset managers, commercial bank trust and investment departments, broker-dealers, and insurance companies. The purchase price payable by INTL FCStone Inc., to be finalized after completion of a financial statement audit, is equal to G.X. Clarke & Co.'s net tangible book value at closing of approximately $26.0 million plus a premium of $1.5 million, and up to an additional $1.5 million over the next three years, subject to the achievement of certain profitability thresholds. In conjunction with the acquisition, the name of G.X. Clarke & Co. has been changed to INTL FCStone Partners L.P.

- 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).

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+ Details

Discontinued Operations (Notes)

3 Months Ended

Dec. 31, 2014

Discontinued Operations [Abstract]

Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]

Discontinued Operations

Exit of Physical Base Metals Business

During the second quarter of fiscal 2013, as a result of a change in management strategy in the Company’s base metals product line, the Company elected to pursue an exit of its physical base metals business. The Company completed the exit of the physical base metals business during the second fiscal quarter of 2014. Under existing accounting guidance, before the implementation of ASU 2014-08, the Company has reclassified the physical base metals activities in the financial statements as discontinued operations for all periods presented. The physical base metals business was previously included in the Commodity and Risk Management Services segment (see Note 19 – Segment Analysis). The Company continues to operate the portion of its base metals business related to non-physical assets, conducted primarily through the London Metals Exchange.

Summarized below are the components of the Company’s income from discontinued operations for the three months ended December 31, 2014 and 2013:



	Three Months Ended December 31,
(in millions)	2014		2013
Total revenues from discontinued operations	$	—	$	29.3
Total cost of sales of physical commodities from discontinued operations	—		28.8
Operating revenues	$	—	$	0.5

Income from discontinued operations before income taxes	$	—	$	0.1
Income tax benefit (expense)	—		—
Income from discontinued operations, net of tax	$	—	$	0.1

- Definition

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

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+ Details

Segment Analysis (Notes)

3 Months Ended

Dec. 31, 2014

Segment Analysis [Abstract]

Segment Reporting Disclosure [Text Block]

Segment Analysis

The Company reports its operating segments based on services provided to customers. Commencing during the quarter ended March 31, 2014, the Company’s operating segments were reorganized into reportable segments as follows:


•	Commercial Hedging which includes Financial Agricultural (Ag’s) & Energy (formerly discussed as the soft commodities product line) and LME metals, previously components of Commodity and Risk Management Services.


•	Global Payments, which was previously a component, along with FX Prime Brokerage, of the Foreign Exchange segment, has been broken out as the single component of a segment named Global Payments.


•	Securities now includes Asset Management, previously a component of Other, as an additional component along with Equity market-making, Debt Trading and Investment Banking.

•

Physical Commodities includes physical precious metals, previously a component of Commodity and Risk Management Services along with Physical Ag’s & Energy (formerly discussed as the commodity financing and facilitation business), previously a component of Other. In addition, physical base metals, previously a component of Commodity and Risk Management Services, is now reported as discontinued operations, and is not part of the Physical Commodities segment information.


•	Clearing and Execution Services now includes the FX Prime Brokerage component as an additional component.

All segment information has been revised to reflect the operating segment reorganization retroactive to October 1, 2012.

Commercial Hedging

The Company serves its commercial clients through its team of risk management consultants, providing a high-value-added service that we believe differentiates it from its competitors and maximizes the opportunity to retain clients. The Company’s risk management consulting services are designed to quantify and monitor commercial entities’ exposure to commodity and financial risk. Upon assessing this exposure the Company develops a plan to control and hedge these risks with post-trade reporting against specific client objectives. Clients are assisted in the execution of their hedging strategies through a wide range of products from listed exchange-traded futures and options, to basic OTC instruments that offer greater flexibility, to structured OTC products designed for customized solutions.

The Company’s services span virtually all traded commodity markets, with the largest concentrations in agricultural and energy commodities (consisting primarily of grains, energy and renewable fuels, coffee, sugar, cotton, and food service) and base metals. The Company’s base metals business includes a position as a Category One ring dealing member of the LME, providing execution, clearing and advisory services in exchange-traded futures and OTC products. The Company also provides execution of foreign currency forwards and options as well as a wide range of structured product solutions to commercial clients who are seeking cost-effective hedging strategies. Generally, clients direct their own trading activity and the Company’s risk management consultants do not have discretionary authority to transact trades on behalf of clients.

Global Payments

The Company provides global payment solutions to banks and commercial businesses as well as charities and non-governmental organizations and government organizations. The Company offers payments services in over 150 currencies, which it believes is more than any other payments solution provider, and provides competitive and transparent pricing. Through its technology platform, full-service electronic execution capability and commitment to customer service, the Company believes it is able to provide simple and fast execution, ensuring delivery of funds in any of these countries quickly through its global network of correspondent banks. In this business, 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 believes its clients value the Company’s ability to provide exchange rates that are significantly more competitive than those offered by large international banks, a competitive advantage that stems from our years of foreign exchange expertise focused on smaller, less liquid currencies. Additionally, as a member of SWIFT (Society for Worldwide Interbank Financial Telecommunication), the Company is able to offer its services to large money center and global banks seeking more competitive international payments services.

Securities

Through INTL FCStone Securities Inc., the Company provides value-added solutions that facilitate cross-border trading. The Company believes its clients value the Company’s ability to manage complex transactions, including foreign exchange, utilizing its local understanding of market convention, liquidity and settlement protocols around the world. The Company’s clients include U.S.-based regional and national broker-dealers and institutions investing or executing customer transactions in international markets and foreign institutions seeking access to the U.S. securities markets. The Company is one of the leading market makers in foreign securities, including unlisted ADRs and foreign ordinary shares. The Company makes markets in approximately 800 ADRs and foreign ordinary shares traded in the OTC market and will, on request, make prices in more than 8,000 other ADRs and foreign common shares. In addition, the Company is a broker-dealer in Argentina where it is active in providing institutional executions in the local capital markets.

The Company provides a full range of corporate finance advisory services to its middle market clients, including capital market solutions and a wide array of advisory services across a broad spectrum of industries. The Company’s advisory services span mergers and acquisitions, liability management, restructuring opinions and valuations. The Company also originates, structures and places a wide array of debt instruments in the international and domestic capital markets. These instruments include complex asset-backed securities (primarily in Argentina), unsecured bond and loan issues, negotiable notes and other trade-related debt instruments used in cross-border trade finance. On occasion, the Company may invest its own capital in debt instruments before selling them. The Company also actively trades in a variety of international debt instruments and operates an asset management business in which it earns fees, commissions and other revenues for management of third party assets and investment gains or losses on its investments in funds and proprietary accounts managed either by its investment managers or by independent investment managers.

Physical Commodities

This segment consists of the Company’s physical precious metals trading and physical agricultural and energy commodity business. In precious metals, the Company provides a full range of trading and hedging capabilities, including OTC products, to select producers, consumers, and investors. In the Company’s trading activities, it acts as a principal, committing its own capital to buy and sell precious metals on a spot and forward basis.

The Company’s physical agricultural and energy commodity business provides financing to commercial commodity-related companies against physical inventories, including grain, lumber, meats, energy products and renewable fuels. The Company uses sale and repurchase agreements 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 engages as a principal in physical purchase and sale transactions related to inputs to the renewable fuels and feed ingredient industries.

The Company records its physical commodities revenues on a gross basis. Operating revenues and losses from its commodities derivatives activities are included in ‘trading gains, net’ 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, reported earnings from physical commodities trading may be subject to significant volatility when calculated under U.S. GAAP.

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 clients’ transactions. Clearing involves the matching of clients’ trades with the exchange, the collection and management of client 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.

In addition, the Company provides prime brokerage foreign exchange services to financial institutions and professional traders. The Company provides its customers with the full range of OTC products, including 24 hour execution of spot, forwards and options as well as non-deliverable forwards in both liquid and exotic currencies. The Company also operates a proprietary foreign exchange desk which arbitrages the exchange-traded foreign exchange markets with the cash markets.

********

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, transaction-based clearing 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 transaction-based clearing 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)	2014			2013
Total revenues:
Commercial Hedging	$	68.4		$	45.6
Global Payments	15.2			13.6
Securities	17.2			21.4
Physical Commodities	13,496.7			7,801.0
Clearing and Execution Services	31.2			27.5
Corporate unallocated	(1.0		)	(0.4		)
Total	$	13,627.7		$	7,908.7
Operating revenues (loss):
Commercial Hedging	$	68.4		$	45.6
Global Payments	15.2			13.6
Securities	17.2			21.4
Physical Commodities	6.5			5.2
Clearing and Execution Services	31.2			27.5
Corporate unallocated	(1.0		)	(0.4		)
Total	$	137.5		$	112.9
Net operating revenues (loss):
Commercial Hedging	$	57.0		$	36.2
Global Payments	13.5			11.8
Securities	10.0			15.6
Physical Commodities	5.6			4.5
Clearing and Execution Services	9.5			7.1
Corporate unallocated	(2.4		)	(1.8		)
Total	$	93.2		$	73.4
Net contribution:
(Revenues less cost of sales, transaction-based clearing expenses, variable bonus compensation, introducing broker commissions and interest expense)
Commercial Hedging	$	40.6		$	26.8
Global Payments	10.8			9.2
Securities	6.6			11.9
Physical Commodities	4.4			3.6
Clearing and Execution Services	7.5			5.7
Total	$	69.9		$	57.2
Segment income:
(Net contribution less non-variable direct segment costs)
Commercial Hedging	$	24.9		$	12.1
Global Payments	8.2			7.0
Securities	1.7			7.2
Physical Commodities	2.5			1.8
Clearing and Execution Services	3.6			1.3
Total	$	40.9		$	29.4
Reconciliation of segment income to income from continuing operations, before tax:
Segment income	$	40.9		$	29.4
Net costs not allocated to operating segments	27.3			25.5
Income from continuing operations, before tax	$	13.6		$	3.9



(continued)
(in millions)	As of December 31, 2014		As of September 30, 2014
Total assets:
Commercial Hedging	$	1,398.7	$	1,400.9
Global Payments	56.7		51.9
Securities	220.3		235.5
Physical Commodities	136.4		116.8
Clearing and Execution Services	1,192.7		1,136.2
Corporate unallocated	122.4		98.4
Total	$	3,127.2	$	3,039.7

- 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

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

Basis of Presentation and Consolidation and Recently Issued Accounting Standards (Policies)	3 Months Ended
	Dec. 31, 2014
Basis of Presentation and Consolidation [Abstract]
Basis of Accounting, Policy [Policy Text Block]	The accompanying condensed consolidated balance sheet as of September 30, 2014, 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, 2014 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]	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.
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, self-insurance liabilities, 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.
Reclassification, Policy [Policy Text Block]	Reclassifications Certain amounts previously reported in the condensed consolidated income statements have been reclassified to conform to the current period presentation. For all periods and amounts presented, reclassifications have been made for discontinued operations. See Note 18 – Discontinued Operations. Beginning with the Company’s report on Form 10-Q for the three months ended March 31, 2014 filed with the SEC, the Company reorganized its reportable segments. All segment information has been revised to reflect the business reorganization for all periods and amounts presented. See Note 19 – Segment Analysis.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements In March 2013, the FASB issued ASU 2013-05, Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity, which addresses the accounting for the cumulative translation adjustment when a parent either sells part or all of its investment in a foreign entity or no longer holds a controlling financial interest in a subsidiary or group of assets that is a nonprofit activity or a business within a foreign entity. For public entities, the ASU is effective prospectively for fiscal years, and interim periods, within those years, beginning after December 15, 2013. The Company adopted this guidance starting with the first quarter ended December 31, 2014. The adoption of this guidance did not have a material impact on the Company’s condensed consolidated financial statements. In July 2013, the FASB issued ASU 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This ASU provides that an unrecognized tax benefit, or a portion thereof, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, except to the extent that a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date to settle any additional income taxes that would result from disallowance of a tax position, or the tax law does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, then the unrecognized tax benefit should be presented as a liability. For public entities, the ASU is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013. The Company adopted this guidance starting with the first quarter ended December 31, 2014. The adoption of this guidance did not have a material impact on the Company’s condensed consolidated financial statements. In April 2014, the FASB issued ASU 2014-08, Presentation of Financial Statements: Reporting Discontinued Operations, which updated guidance on reporting discontinued operations and disclosures of disposals of components of an entity. Under the amendment only those disposals of components of an entity that represent a strategic shift that has (or will have) a major effect on an entity’s operations and financial results will be reported as discontinued operations in the financial statements. Next, the elimination of the component's operations, cash flows and significant continuing involvement conditions have been removed. Lastly, an equity method investment could be reported as discontinued operations. The updated guidance is effective prospectively for all disposals or classifications as held for sale that occur within annual periods beginning after December 15, 2014. The Company expects to adopt this guidance starting with the first quarter of fiscal year 2016. The Company does not expect the adoption of this guidance to have a material impact on the condensed consolidated financial statements. On May 28, 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. For public entities, the ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. Early application is not permitted. The Company expects to adopt this guidance starting with the first quarter of fiscal year 2018. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on its condensed consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting. In June 2014, the FASB issued ASU 2014-11, Transfers and Servicing: Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures, which changes the accounting for repurchase-to-maturity transactions to secured borrowing accounting. Additionally, for repurchase financing arrangements, the amendments of this ASU require separate accounting for a transfer of a financial asset executed contemporaneously with a repurchase agreement with the same counterparty, which will result in secured borrowing accounting for the repurchase agreement. For public entities, the ASU is effective for the first interim or annual period beginning after December 15, 2014. Earlier application is not permitted. The Company expects to adopt this guidance starting with the second quarter of fiscal year 2015. The Company does not expect the adoption of this guidance to have a material impact on the condensed consolidated financial statements. In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements - Going Concern: Disclosures of Uncertainties about an Entity’s Ability to Continue as a Going Concern, which requires management to evaluate whether there are conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the financial statements are issued or are available to be issued. This ASU also requires management to disclose certain information depending on the results of the going concern evaluation. The provisions of this ASU are effective for annual periods ending after December 15, 2016, and for interim and annual periods thereafter. Early adoption is permitted. This amendment is applicable to the Company beginning in the first quarter of fiscal year 2018. The adoption of this standard is not expected to have a material impact on the condensed consolidated financial statements. In January 2015, the FASB issued ASU No. 2015-01, Income Statement - Extraordinary and Unusual Items: Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items, which eliminates from U.S. GAAP the concept of extraordinary items. The ASU retains and expands the existing presentation and disclosure guidance for items that are unusual in nature or occur infrequently to also include items that are both unusual in nature and infrequently occurring. The provisions of this ASU are effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. Early adoption is permitted, provided that presentation applied to the beginning of the fiscal year of adoption. This amendment is applicable to the Company beginning in the first quarter of 2018. The adoption of this standard is not expected to have a material impact on the 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 + 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 (Policies)	3 Months Ended
Earnings per Share (Policies)	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share, Potentially Dilutive Securities	The dilutive effect of share-based awards is reflected in diluted net income 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 Accounting Standards Codification (“ASC”).

Receivables From Customers, Net and Notes Receivable, Net (Policies)	3 Months Ended
	Dec. 31, 2014
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 (Policies)	3 Months Ended
Commitments and Contingencies (Policies)	Dec. 31, 2014
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 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. Our assessments are based on estimates and assumptions that have been deemed reasonable by management, but that may later prove to be incomplete or inaccurate, and unanticipated events and circumstances may occur that might cause us to change those estimates and assumptions.

Income Taxes (Policies)	3 Months Ended
Income Taxes (Policies)	Dec. 31, 2014
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 the 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 (Tables)

3 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

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

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 per share computations for the periods presented below.



	Three Months Ended December 31,
(in millions, except share amounts)	2014			2013
Numerator:
Income from continuing operations	$	9.4		$	2.4
Less: Allocation to participating securities	(0.2		)	(0.1		)
Income from continuing operations allocated to common stockholders	$	9.2		$	2.3
(Loss) income from discontinued operations	$	—		$	0.1
Less: Allocation to participating securities	—			—
(Loss) income from discontinued operations allocated to common stockholders	$	—		$	0.1
Diluted net income	$	9.4		$	2.5
Less: Allocation to participating securities	(0.2		)	(0.1		)
Diluted net income allocated to common stockholders	$	9.2		$	2.4
Denominator:
Weighted average number of:
Common shares outstanding	18,515,528			18,657,678
Dilutive potential common shares outstanding:
Share-based awards	246,501			700,764
Diluted weighted-average shares	18,762,029			19,358,442

Assets and Liabilities, at Fair Value (Tables)

3 Months Ended

Dec. 31, 2014

Assets and Liabilities, at Fair Value [Abstract]

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



	December 31, 2014
(in millions)	Level 1		Level 2		Level 3		Netting and Collateral (1)			Total
Assets:
Unrestricted cash equivalents - certificate of deposits	$	1.0	$	—	$	—	$	—		$	1.0
Commodities warehouse receipts	14.5		—		—		—			14.5
U.S. government obligations	—		299.7		—		—			299.7
Securities and other assets segregated under federal and other regulations	14.5		299.7		—		—			314.2
Money market funds	692.4		—		—		—			692.4
U.S. government obligations	—		702.8		—		—			702.8
Derivatives	6,694.6		—		—		(7,029.2		)	(334.6		)
Deposits and receivables from exchange-clearing organizations	7,387.0		702.8		—		(7,029.2		)	1,060.6
Deposits and receivables from broker-dealers, clearing organizations and counterparties - derivatives	408.9		—		—		(414.5		)	(5.6		)
Common and preferred stock and American Depositary Receipts (“ADRs”)	68.8		4.0		0.6		—			73.4
Exchangeable foreign ordinary equities and ADRs	14.0		—		—		—			14.0
Corporate and municipal bonds	7.3		4.6		3.5		—			15.4
U.S. government obligations	—		0.3		—		—			0.3
Foreign government obligations	—		10.0		—		—			10.0
Derivatives	146.5		1,708.5		—		(1,819.1		)	35.9
Commodities leases	—		61.5		—		(59.9		)	1.6
Commodities warehouse receipts	1.3		—		—		—			1.3
Exchange firm common stock	5.3		—		—		—			5.3
Mutual funds and other	2.7		—		—		—			2.7
Financial instruments owned	245.9		1,788.9		4.1		(1,879.0		)	159.9
Total assets at fair value	$	8,057.3	$	2,791.4	$	4.1	$	(9,322.7	)	$	1,530.1
Liabilities:
Accounts payable and other accrued liabilities - contingent liabilities	$	—	$	—	$	2.2	$	—		$	2.2
Payable to customers - derivatives	7,027.5		—		—		(7,027.5		)	—
Common and preferred stock and ADRs	70.9		3.2		—		—			74.1
Exchangeable foreign ordinary equities and ADRs	5.4		—		—		—			5.4
Corporate and municipal bonds	0.1		—		—		—			0.1
Derivatives	131.0		1,659.4		—		(1,710.1		)	80.3
Commodities leases	—		168.9		—		(101.8		)	67.1
Financial instruments sold, not yet purchased	207.4		1,831.5		—		(1,811.9		)	227.0
Total liabilities at fair value	$	7,234.9	$	1,831.5	$	2.2	$	(8,839.4	)	$	229.2


(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 is included in that level.



	September 30, 2014
(in millions)	Level 1		Level 2		Level 3		Netting and Collateral (1)			Total
Assets:
Unrestricted cash equivalents - certificates of deposits	$	1.5	$	—	$	—	$	—		$	1.5
Commodities warehouse receipts	14.8		—		—		—			14.8
U.S. government obligations	—		0.5		—		—			0.5
Securities and other assets segregated under federal and other regulations	14.8		0.5		—		—			15.3
Money market funds	826.8		—		—		—			826.8
U.S. government obligations	—		702.5		—		—			702.5
Derivatives	3,397.1		—		—		(3,671.0		)	(273.9		)
Deposits and receivables from exchange-clearing organizations	4,223.9		702.5		—		(3,671.0		)	1,255.4
Deposits and receivables from broker-dealers, clearing organizations and counterparties - derivatives	549.0		—		—		(550.1		)	(1.1		)
Common and preferred stock and American Depositary Receipts (“ADRs”)	66.8		15.0		0.7		—			82.5
Exchangeable foreign ordinary equities and ADRs	27.2		—		—		—			27.2
Corporate and municipal bonds	7.1		9.0		3.6		—			19.7
U.S. government obligations	—		0.3		—		—			0.3
Foreign government obligations	—		10.7		—		—			10.7
Derivatives	332.4		2,328.3		—		(2,616.4		)	44.3
Commodities leases	—		60.1		—		(58.0		)	2.1
Commodities warehouse receipts	3.6		—		—		—			3.6
Exchange firm common stock	4.8		—		—		—			4.8
Mutual funds and other	2.7		—		—		—			2.7
Financial instruments owned	444.6		2,423.4		4.3		(2,674.4		)	197.9
Total assets at fair value	$	5,233.8	$	3,126.4	$	4.3	$	(6,895.5	)	$	1,469.0
Liabilities:
Accounts payable and other accrued liabilities - contingent liabilities	$	—	$	—	$	5.5	$	—		$	5.5
Payable to customers - derivatives	3,469.8		—		—		(3,469.8		)	—
Common and preferred stock and ADRs	92.8		2.6		—		—			95.4
Exchangeable foreign ordinary equities and ADRs	5.8		—		—		—			5.8
Corporate and municipal bonds	2.8		—		—		—			2.8
Derivatives	327.0		2,257.7		—		(2,500.3		)	84.4
Commodities leases	—		176.0		—		(100.4		)	75.6
Financial instruments sold, not yet purchased	428.4		2,436.3		—		(2,600.7		)	264.0
Total liabilities at fair value	$	3,898.2	$	2,436.3	$	5.5	$	(6,070.5	)	$	269.5


(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 is 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 in level 3 of the fair value hierarchy as of December 31, 2014 and September 30, 2014 are summarized below:



(in millions)	December 31, 2014			September 30, 2014
Total level 3 assets	$	4.1		$	4.3
Level 3 assets for which the Company bears economic exposure	$	4.1		$	4.3
Total assets	$	3,127.2		$	3,039.7
Total financial assets at fair value	$	1,530.1		$	1,469.0
Total level 3 assets as a percentage of total assets	0.1		%	0.1		%
Level 3 assets for which the Company bears economic exposure as a percentage of total assets	0.1		%	0.1		%
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, 2014
(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	$	0.7	$	—	$	(0.1	)	$	—	$	—		$	—	$	0.6
Corporate and municipal bonds	3.6		—		(0.1		)	—		—			—		3.5
	$	4.3	$	—	$	(0.2	)	$	—	$	—		$	—	$	4.1

	Balances at beginning of period		Realized gains (losses) during period		Remeasurement gains (losses) during period			Acquisitions		Settlements			Transfers in or (out) of Level 3		Balances at end of period
Liabilities:
Contingent liabilities	$	5.5	$	—	$	0.1		$	—	$	(3.4	)	$	—	$	2.2



	Level 3 Financial Assets and Financial Liabilities For the Three Months Ended December 31, 2013
(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	$	0.7	$	—	$	—		$	—	$	—		$	—	$	0.7
Corporate and municipal bonds	3.5		—		(0.1		)	—		—			—		3.4
	$	4.2	$	—	$	(0.1	)	$	—	$	—		$	—	$	4.1

	Balances at beginning of period		Realized gains (losses) during period		Remeasurement gains (losses) during period			Acquisitions		Settlements			Transfers in or (out) of Level 3		Balances at end of period
Liabilities:
Contingent liabilities	$	9.6	$	—	$	0.2		$	—	$	(0.7	)	$	—	$	9.1

Available-for-sale Securities [Table Text Block]



December 31, 2014
Amounts included in deposits with and receivables from exchange-clearing organizations and securities segregated:
	Amortized Cost		Unrealized Holding				Estimated Fair Value
(in millions)	Amortized Cost		Gains		(Losses)		Estimated Fair Value
U.S. government obligations	$	967.8	$	1.2	$	—	$	969.0



September 30, 2014
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	$	666.8	$	—	$	—	$	666.8

(1) Unrealized gain/loss on U.S. government obligations as of September 30, 2014, was less than $0.1 million.

As of December 31, 2014 and September 30, 2014, investments in debt securities classified as available-for-sale (“AFS”) mature as follows:



December 31, 2014
	Due in				Estimated Fair Value
(in millions)	Less than 1 year		1 year or more		Estimated Fair Value
U.S. government obligations	$	389.7	$	579.3	$	969.0



September 30, 2014
	Due in				Estimated Fair Value
(in millions)	Less than 1 year		1 year or more		Estimated Fair Value
U.S. government obligations	$	287.6	$	379.2	$	666.8

- 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 + Details

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

3 Months Ended

Dec. 31, 2014

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

Schedule of Derivative Instruments [Table Text Block]



	December 31, 2014						September 30, 2014
(in millions)	Assets ⁽¹⁾			Liabilities ⁽¹⁾			Assets ⁽¹⁾			Liabilities ⁽¹⁾
Derivative contracts not accounted for as hedges:
Exchange-traded commodity derivatives	$	6,546.2		$	6,401.7		$	3,777.7		$	3,255.4
OTC commodity derivatives	1,291.3			1,191.5			1,852.3			1,842.9
Exchange-traded foreign exchange derivatives	28.4			23.3			93.5			90.2
OTC foreign exchange derivatives	969.4			1,010.5			808.0			741.8
Exchange-traded interest rate derivatives	100.7			115.2			13.4			10.2
Equity index derivatives	22.5			75.7			61.9			114.0
Gross fair value of derivative contracts	8,958.5			8,817.9			6,606.8			6,054.5
Impact of netting and collateral	(9,262.8		)	(8,737.6		)	(6,837.5		)	(5,970.1		)
Total fair value included in ‘Deposits and receivables from exchange-clearing organizations’	$	(334.6	)				$	(273.9	)
Total fair value included in ‘Deposits and receivables from broker-dealers, clearing organizations and counterparties’	$	(5.6	)				$	(1.1	)
Total fair value included in ‘Financial instruments owned, at fair value’	$	35.9					$	44.3
Fair value included in ‘Financial instruments sold, not yet purchased, at fair value’				$	80.3					$	84.4


(1)	As of December 31, 2014 and September 30, 2014, the Company’s derivative contract volume for open positions were approximately 4.0 million and 4.5 million contracts, respectively.

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



	Three Months Ended December 31,
(in millions)	2014		2013
Commodities	$	25.2	$	8.7
Foreign exchange	2.2		2.1
Net gains (losses) from derivative contracts	$	27.4	$	10.8

- 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
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41641-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41638-113959

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579240-113959

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41620-113959

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(n)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Goodwill (Tables)

3 Months Ended

Dec. 31, 2014

Goodwill [Abstract]

Schedule of Goodwill [Table Text Block]

The carrying value of goodwill is allocated to the Company’s operating segment as follows:



(in millions)	December 31, 2014		September 30, 2014
Commercial Hedging	$	30.7	$	30.7
Global Payments	6.3		6.3
Physical Commodities	2.4		2.4
Securities	8.1		8.1
Goodwill	$	47.5	$	47.5

Intangible Assets - (Tables)

3 Months Ended

Dec. 31, 2014

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, 2014							September 30, 2014
(in millions)	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Intangible assets subject to amortization
Software programs/platforms	$	2.2	$	(2.0	)	$	0.2	$	2.2	$	(1.9	)	$	0.3
Customer base	12.9		(4.1		)	8.8		12.9		(3.8		)	9.1
	15.1		(6.1		)	9.0		15.1		(5.7		)	9.4
Intangible assets not subject to amortization
Trade name	1.1		—			1.1		1.1		—			1.1
Total intangible assets	$	16.2	$	(6.1	)	$	10.1	$	16.2	$	(5.7	)	$	10.5

Schedule of Expected Amortization Expense [Table Text Block]

Amortization expense related to intangible assets was $0.4 million and $0.3 million for the three months ended December 31, 2014 and 2013, respectively.

As of December 31, 2014, the estimated future amortization expense was as follows:



(in millions)
Fiscal 2015 (remaining nine months)	$	0.9
Fiscal 2016	0.7
Fiscal 2017	0.7
Fiscal 2018	0.7
Fiscal 2019 and thereafter	6.0
	$	9.0

Credit Facilities (Tables)

3 Months Ended

Dec. 31, 2014

Credit Facilities [Abstract]

Schedule of Debt [Table Text Block]



(in millions)
Credit Facilities						Amounts Outstanding
	Borrower	Security	Renewal / Expiration Date	Total Commitment		December 31, 2014		September 30, 2014
	INTL FCStone Inc.	Pledged shares of certain subsidiaries	September 20, 2016	$	140.0	$	31.0	$	15.0
	FCStone, LLC	None	April 9, 2015	75.0		—		—
	FCStone Merchants	Certain commodities assets	May 1, 2015	30.0		18.1		7.5
	INTL FCStone, Ltd.	None	November 5, 2015	25.0		—		—
				$	270.0	$	49.1	$	22.5
Senior Unsecured Notes
	8.50% senior notes, due July 30, 2020					45.5		45.5
Total indebtedness						$	94.6	$	68.0

Capital and Other Regulatory Requirements (Tables)

3 Months Ended

Dec. 31, 2014

Capital and Other Regulatory Requirements [Abstract]

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

The subsidiaries of the Company were in compliance with all of their regulatory requirements as of December 31, 2014, as follows:



(in millions)			As of December 31, 2014
Subsidiary	Regulatory Authority	Requirement Type	Actual		Minimum Requirement
FCStone, LLC	CFTC	Net capital	$	121.3	$	67.0
FCStone, LLC	CFTC	Segregated funds	$	1,824.5	$	1,783.9
FCStone, LLC	CFTC	Secured funds	$	83.6	$	64.8
INTL FCStone Ltd	FCA (United Kingdom)	Net capital	$	83.4	$	56.6
INTL FCStone Ltd	FCA (United Kingdom)	Segregated funds	$	117.9	$	117.9
INTL FCStone Securities Inc.	SEC	Net capital	$	3.4	$	1.0
FCC Investments, Inc.	SEC	Net capital	$	0.3	$	0.3
FCStone Australia	Australian Securities and Investment Commission	Net capital	$	1.5	$	0.8
FCStone Australia	Australian Securities and Investment Commission	Segregated funds	$	25.2	$	21.4
FCStone Australia	New Zealand Clearing Ltd	Capital adequacy	$	11.4	$	3.9
INTL FCStone DTVM Ltda.	Brazilian Central Bank and Securities and Exchange Commission of Brazil	Capital adequacy	$	3.1	$	0.6
Gainvest S.A. Sociedad Gerente de FCI	Comision Nacional de Valores	Capital adequacy	$	4.7	$	0.2
Gainvest S.A. Sociedad Gerente de FCI	Comision Nacional de Valores	Net capital	$	0.7	$	0.1
INTL Capital S.A.	General Inspector of Justice (Argentina)	Net capital	$	10.6	$	7.0
INTL CIBSA S.A.	Comision Nacional de Valores	Capital adequacy	$	3.3	$	1.8
INTL CIBSA S.A	Comision Nacional de Valores	Net capital	$	3.9	$	0.9

Share-Based Compensation (Tables)

3 Months Ended

Dec. 31, 2014

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

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, 2014:



	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, 2014	913,500	1,578,056		$	25.38	$	11.58	4.16	$	1.9
Granted	—	—		$	—	$	—
Exercised	—	(190,398	)	$	7.52	$	3.40
Forfeited	—	—		$	—	$	—
Expired	—	(39,389	)	$	23.41	$	11.60
Balances as of December 31, 2014	913,500	1,348,269		$	27.96	$	12.74	4.58	$	0.7
Exercisable as of December 31, 2014		459,620		$	33.98	$	13.42	1.48	$	0.5

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

The following is a summary of restricted stock activity for the three months ended December 31, 2014:



	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, 2014	1,096,325		229,851		$	20.03	1.79	$	4.0
Granted	(83,923	)	83,923		$	18.37
Vested	—		(72,268	)	$	22.23
Forfeited	328		(328	)	$	18.12
Balances as of December 31, 2014	1,012,730		241,178		$	18.80	2.49	$	5.0

Other Expenses (Tables)

3 Months Ended

Dec. 31, 2014

Other Expenses [Abstract]

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

Other expenses for the three months ended December 31, 2014 and 2013 consisted of the following:



	Three Months Ended December 31,
(in millions)	2014		2013
Contingent consideration, net	$	0.1	$	0.2
Insurance	0.5		0.5
Advertising, meetings and conferences	0.6		0.4
Non-trading hardware and software maintenance and software licensing	1.2		0.7
Office supplies and printing	0.3		0.3
Other clearing related expenses	0.4		0.4
Other non-income taxes	1.0		1.0
Other	1.3		1.2
Total other expenses	$	5.4	$	4.7

Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Dec. 31, 2014

Accumulated Other Comprehensive Income (Loss) [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following table summarizes the changes in accumulated other comprehensive income (loss) for the three months ended December 31, 2014.



(in millions)	Foreign Currency Translation Adjustment			Pension Benefits Adjustment			Unrealized Gain or Loss on Available-for-Sale Securities			Accumulated Other Comprehensive Loss
Balances as of September 30, 2014	$	(8.7	)	$	(3.5	)	$	0.6		$	(11.6	)
Other comprehensive income (loss), net of tax before reclassifications	(0.3		)	—			1.1			0.8
Amounts reclassified from AOCI, net of tax	—			—			—		⁽¹⁾	—
Net current period other comprehensive income (loss), net of tax	(0.3		)	—			1.1			0.8
Balances as of December 31, 2014	$	(9.0	)	$	(3.5	)	$	1.7		$	(10.8	)

(1) Amounts reclassified from OCI for the three months ended December 31, 2014 were less than $0.1 million.

Discontinued Operations (Tables)

3 Months Ended

Dec. 31, 2014

Discontinued Operations [Abstract]

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]

Summarized below are the components of the Company’s income from discontinued operations for the three months ended December 31, 2014 and 2013:



	Three Months Ended December 31,
(in millions)	2014		2013
Total revenues from discontinued operations	$	—	$	29.3
Total cost of sales of physical commodities from discontinued operations	—		28.8
Operating revenues	$	—	$	0.5

Income from discontinued operations before income taxes	$	—	$	0.1
Income tax benefit (expense)	—		—
Income from discontinued operations, net of tax	$	—	$	0.1

- Definition

Tabular disclosure of disposal groups, which may include the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the classification and carrying value of the assets and liabilities comprising the disposal group, and the segment in which the disposal group was reported. Also may include the amount of adjustments to amounts previously reported in discontinued operations such as resolution of contingencies arising from the disposal transaction or the operations of the component prior to disposal.

+ References + Details

Segment Analysis (Tables)

3 Months Ended

Dec. 31, 2014

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)	2014			2013
Total revenues:
Commercial Hedging	$	68.4		$	45.6
Global Payments	15.2			13.6
Securities	17.2			21.4
Physical Commodities	13,496.7			7,801.0
Clearing and Execution Services	31.2			27.5
Corporate unallocated	(1.0		)	(0.4		)
Total	$	13,627.7		$	7,908.7
Operating revenues (loss):
Commercial Hedging	$	68.4		$	45.6
Global Payments	15.2			13.6
Securities	17.2			21.4
Physical Commodities	6.5			5.2
Clearing and Execution Services	31.2			27.5
Corporate unallocated	(1.0		)	(0.4		)
Total	$	137.5		$	112.9
Net operating revenues (loss):
Commercial Hedging	$	57.0		$	36.2
Global Payments	13.5			11.8
Securities	10.0			15.6
Physical Commodities	5.6			4.5
Clearing and Execution Services	9.5			7.1
Corporate unallocated	(2.4		)	(1.8		)
Total	$	93.2		$	73.4
Net contribution:
(Revenues less cost of sales, transaction-based clearing expenses, variable bonus compensation, introducing broker commissions and interest expense)
Commercial Hedging	$	40.6		$	26.8
Global Payments	10.8			9.2
Securities	6.6			11.9
Physical Commodities	4.4			3.6
Clearing and Execution Services	7.5			5.7
Total	$	69.9		$	57.2
Segment income:
(Net contribution less non-variable direct segment costs)
Commercial Hedging	$	24.9		$	12.1
Global Payments	8.2			7.0
Securities	1.7			7.2
Physical Commodities	2.5			1.8
Clearing and Execution Services	3.6			1.3
Total	$	40.9		$	29.4
Reconciliation of segment income to income from continuing operations, before tax:
Segment income	$	40.9		$	29.4
Net costs not allocated to operating segments	27.3			25.5
Income from continuing operations, before tax	$	13.6		$	3.9



(continued)
(in millions)	As of December 31, 2014		As of September 30, 2014
Total assets:
Commercial Hedging	$	1,398.7	$	1,400.9
Global Payments	56.7		51.9
Securities	220.3		235.5
Physical Commodities	136.4		116.8
Clearing and Execution Services	1,192.7		1,136.2
Corporate unallocated	122.4		98.4
Total	$	3,127.2	$	3,039.7

Basis of Presentation and Consolidation and Recently Issued Accounting Standards (Details)	3 Months Ended
	Dec. 31, 2014
Basis of Presentation and Consolidation [Abstract]
Number of different types of foreign currencies	150
Number of accounts for customers company-wide	20,000
Number of customers company-wide	11,000

Earnings per Share - EPS Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Income from continuing operations	$ 9.4	$ 2.4
Undistributed Earnings Allocated to Participating Securities - Continuing Operations	(0.2)	(0.1)
Income from continuing operations allocated to common shareholders	9.2	2.3
(Loss) Income from discontinued operations, net of tax	0.0	0.1
Undistributed Earnings Allocated to Participating Securities - Discontinued Operations	0.0	0.0
Income from discontinued operations allocated to common shareholders	0.0	0.1
Diluted net income	9.4	2.5
Less: Allocation to participating securities	(0.2)	(0.1)
Diluted net income allocated to common shareholders	$ 9.2	$ 2.4
Weighted average number of common shares outstanding	18,515,528	18,657,678
Weighted average number of dilutive potential common shares outstanding:
Share-based awards	246,501	700,764
Diluted weighted-average shares	18,762,029	19,358,442

Earnings per Share - Antidulitive Securities (Details) - shares	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,264,770	1,126,282

Assets and Liabilities, at Fair Value Assets and Liabilities, at Fair Value - Financial Instruments at Fair Value Disclosure (Details) - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Assets and Liabilities, at Fair Value [Abstract]
Long-term Debt, Fair Value	$ 46.4
Senior unsecured notes	$ 45.5	$ 45.5

Assets and Liabilities, at Fair Value - Details of Level 3 Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Assets and Liabilities, at Fair Value [Abstract]
Total Level 3 Assets	$ 4.1	$ 4.3
Level 3 assets for which the company bears economic exposure	4.1	4.3
Assets	3,127.2	3,039.7
Assets, Fair Value Disclosure	$ 1,530.1	$ 1,469.0
Total level 3 assets as a percentage of total assets	0.10%	0.10%
Level 3 assets for which the company bears economic exposure as a percertange of total assets	0.10%	0.10%
Total level 3 assets as a percentage of total financial assets at fair value	0.30%	0.30%
Suriwongse Debt Investment Balance	$ 3.5

Assets and Liabilities, at Fair Value - Rollforward of Level 3 (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Rollforward of Level 3 Securities [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 4.3	$ 4.2
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)	(0.2)	(0.1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0.0	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	4.1	4.1
Contingent Consideration [Member]
Rollforward of Level 3 Liabilities [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	5.5	9.6
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)	0.1	0.2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	0.0	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	(3.4)	(0.7)
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	2.2	9.1
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	0.7	0.7
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)	(0.1)	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0.0	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	0.6	0.7
Corporate Debt Securities [Member]
Rollforward of Level 3 Securities [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	3.6	3.5
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)	(0.1)	(0.1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0.0	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	$ 3.5	$ 3.4

Assets and Liabilities, at Fair Value - Contingent Consideration (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Payments to Acquire Businesses, Gross	$ (3.4)
Change in fair value of contingent consideration for acquisitions	0.1	$ 0.2
Contingent Consideration [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in fair value of contingent consideration for acquisitions	$ 0.1	$ 0.2

Assets and Liabilities, at Fair Value - Available for Sale Securities in OCI (Details) - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Assets and Liabilities, at Fair Value [Abstract]
Equity Investments in Exchange Stock - Cost	$ 3.7	$ 3.7
Equity Investments in Exchange Stock - Fair Value	5.3	4.8
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	1.7	0.7
Deferred Income Taxes, Accumulated Other Comprehensive Income - AFS	$ (1.0)	$ (0.4)

Assets and Liabilities, at Fair Value - Available for Sale Securities - Dep and Rec (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014
US Government Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	$ 967.8	$ 666.8
Available-for-sale Securities, Gross Unrealized Gains	1.2	0.0
Available-for-sale Securities, Gross Unrealized Losses	0.0	0.0
Available-for-sale Securities, Debt Securities	$ 969.0	666.8
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

Assets and Liabilities, at Fair Value - Available for Sale Securities (Maturities) (Details) - US Government Debt Securities [Member] - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	$ 389.7	$ 287.6
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	579.3	379.2
Available-for-sale Securities, Debt Securities	$ 969.0	$ 666.8

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, 2014	Sep. 30, 2014
Financial Instruments Sold, Not yet Purchased, at Fair Value	$ 227.0	$ 264.0
Financial instrument sold, not yet purchased [Member]
Derivative, Fair Value, Net	$ 80.3	$ 84.4

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, 2014	Sep. 30, 2014
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 8,958.5	$ 6,606.8
Derivative Liability, Fair Value, Gross Liability	8,817.9	6,054.5
Derivative Asset, Fair Value, Amount Offset Against Collateral	(9,262.8)	(6,837.5)
Derivative Liability, Fair Value, Amount Offset Against Collateral	(8,737.6)	(5,970.1)
Exchange-traded Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	6,546.2	3,777.7
Derivative Liability, Fair Value, Gross Liability	6,401.7	3,255.4
Over the Counter (OTC) Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1,291.3	1,852.3
Derivative Liability, Fair Value, Gross Liability	1,191.5	1,842.9
Foreign Exchange Forward [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	28.4	93.5
Derivative Liability, Fair Value, Gross Liability	23.3	90.2
Over the Counter (OTC) Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	969.4	808.0
Derivative Liability, Fair Value, Gross Liability	1,010.5	741.8
Exchange-traded interest rate contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	100.7	13.4
Derivative Liability, Fair Value, Gross Liability	115.2	10.2
Equity Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	22.5	61.9
Derivative Liability, Fair Value, Gross Liability	75.7	114.0
Deposits and Receivables from Exchange Clearing Organizations [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	(334.6)	(273.9)
Deposits and receivables from broker-dealers, clearing organizations and counterparties [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	(5.6)	(1.1)
Financial instruments owned [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	35.9	44.3
Financial instrument sold, not yet purchased [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	$ 80.3	$ 84.4

Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk - Derivatives Volume (Details) number in Millions	Dec. 31, 2014	Sep. 30, 2014
Financial Instruments with Off-Balance Sheet Risk and Concentrations of Credit Risk [Abstract]
Derivative, Number of Instruments Held	4.0	4.5

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, 2014	Dec. 31, 2013
Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ 25.2	$ 8.7
Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	2.2	2.1
Derivative [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ 27.4	$ 10.8

Receivables From Customers, Net and Notes Receivable, Net - Allowance for Customer Receivables (Details) - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Receivables from customers and notes receivable, net [Abstract]
Allowance for Doubtful Accounts Receivable	$ 5.7	$ 5.7

Receivables From Customers, Net and Notes Receivable, Net - Allowance for Notes Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Receivables from customers and notes receivable, net [Abstract]
Allowance Notes Receivable	$ 0.1	$ 0.1

Receivables From Customers, Net and Notes Receivable, Net - Exim Bank Notes Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Insured short-term notes receivable	$ 37.7	$ 33.8
Obligations for participation rights	$ 32.6	$ 25.8
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 by CIP and Finished (Details) - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Physical Commodities Inventory [Abstract]
Finished commodities	$ 45.1	$ 40.0

Physical Commodities Inventory - LCM Adjustments (Details) - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Physical Commodities Inventory [Abstract]
Inventory Adjustments	$ 0.8	$ 1.0

Goodwill - Goodwill by Segment (Details) - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Goodwill [Line Items]
Goodwill	$ 47.5	$ 47.5
Commercial Hedging [Member]
Goodwill [Line Items]
Goodwill	30.7	30.7
Global Payments [Member]
Goodwill [Line Items]
Goodwill	6.3	6.3
Physical Commodities [Member]
Goodwill [Line Items]
Goodwill	2.4	2.4
Securities [Member]
Goodwill [Line Items]
Goodwill	$ 8.1	$ 8.1

Intangible Assets - Gross and Net Intangible Assets by Major Class (Details) - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 15.1	$ 15.1
Finite-Lived Intangible Assets, Accumulated Amortization	(6.1)	(5.7)
Finite-Lived Intangible Assets, Net	9.0	9.4
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	(2.0)	(1.9)
Finite-Lived Intangible Assets, Net	0.2	0.3
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Customer Lists, Gross	12.9	12.9
Finite-Lived Intangible Assets, Accumulated Amortization	(4.1)	(3.8)
Finite-Lived Intangible Assets, Net	$ 8.8	$ 9.1

Intangible Assets - Indefinite-Lived Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014
Indefinite-lived Intangible Assets [Line Items]
Gross Finite and Indefinite-Lived Intangible Assets	$ 16.2	$ 16.2
Finite and Indefinited-Lived Accumulated Amortization and Impairment Charges	(6.1)	(5.7)
Intangible Assets, Net (Excluding Goodwill)	10.1	10.5
Trade Names [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Trade Names	1.1	1.1
Indefinite-lived Intangible Assets, Impairment Losses	$ 0.0	$ 0.0

Intangible Assets - Finite-Lived Intangible Assets Future Amortization Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Intangible Assets [Abstract]
Amortization of Intangible Assets	$ 0.4	$ 0.3
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Fiscal 2015 (remaining nine months)	0.9
Fiscal 2016	0.7
Fiscal 2017	0.7
Fiscal 2018	0.7
Fiscal 2019 and thereafter	6.0
Finite-Lived Intangible Assets, Net	$ 9.0		$ 9.4

Credit Facilities - Number of Credit Facilities (Details)	Dec. 31, 2014
Credit Facilities [Abstract]
Number of credit facilities	4

Credit Facilities - Credit Facilities (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2014	Sep. 30, 2014
Line of Credit Facility [Line Items]
Line of Credit Facility, Amount Outstanding		$ 49.1	$ 22.5
Senior unsecured notes		45.5	45.5
Debt and Capital Lease Obligations		$ 94.6	68.0
Debt Instrument, Interest Rate, Stated Percentage		8.50%
Debt Instrument, Call Feature, Redemption Price Percentage of Principal		100.00%
Debt Issuance Cost	$ 1.7
Main line of credit facilities [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 270.0
Line of Credit Facility, Current Borrowing Capacity		130.0
HCO Syndicated 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		31.0	15.0
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	0.0
FMS Sub-note commodity line of credit facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		30.0
Line of Credit Facility, Amount Outstanding		18.1	7.5
INTL FCStone Ltd [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		25.0
Line of Credit Facility, Amount Outstanding		$ 0.0	$ 0.0

Commodity and Other Repurchase Agreements Commodity and Other Repurchase Agreements (Details) - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Commodity and Other Repurchase Agreements [Abstract]
Financing Receivables, net - Sales/Repurchase Agreements	$ 31.0	$ 20.6
Obligations outstanding related to commodities sold under repurchase agreements	$ 18.1	$ 7.5

Commitments and Contingencies - Contingencies and Litigation (Details) $ in Millions	3 Months Ended
	Dec. 31, 2014 USD ($)
Commitments and Contingencies [Abstract]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	$ 0.5
Excess segregated funds returned	15.5
Excess segregated funds invested	21.9
Pre and Post Transfers of Funds related to Sentinel	$ 15.5

Commitments and Contingencies - Contigent Consideration for Acquisitions (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Business Acquisition, Contingent Consideration [Line Items]
Business Combination, Contingent Consideration, Liability	$ 2.2		$ 5.5
Change in fair value of contingent consideration for acquisitions	0.1	$ 0.2
Tradewire Acquisition [Member] [Member]
Business Acquisition, Contingent Consideration [Line Items]
Business Combination, Contingent Consideration, Liability	1.9
Present Value of Estimated Total Purchase Price	3.4
Forward Insight Commodities Acquisition [Member]
Business Acquisition, Contingent Consideration [Line Items]
Business Combination, Contingent Consideration, Liability	0.3
Present Value of Estimated Total Purchase Price	0.5
Contingent Consideration [Member]
Business Acquisition, Contingent Consideration [Line Items]
Change in fair value of contingent consideration for acquisitions	$ 0.1	$ 0.2

Commitments and Contingencies Commitments and Contingencies - Self Insurance (Details) $ in Millions	Dec. 31, 2014 USD ($)
Commitments and Contingencies [Abstract]
Self Insurance Reserve	$ 0.6

Capital and Other Regulatory Requirements - Regulatory Capital Requirements (Details) $ in Millions	Dec. 31, 2014 USD ($)
FCStone LLC [Member]
Net Capital under Commodity Exchange Act Computation	$ 121.3
Required Net Capital under Commodity Exchange Act	67.0
Cash and Securities Segregated under Commodity Exchange Act Regulation	1,824.5
Cash and Securities Segregated under Commodity Exchange Act Regulation, Amount Required to be Segregated	1,783.9
Secured Funds	83.6
Secured Funds Required Under Commodity Exchange Act	64.8
INTL FCStone Ltd [Member]
Net Capital under Commodity Exchange Act Computation	83.4
Required Net Capital under Commodity Exchange Act	56.6
Cash and Securities Segregated under Commodity Exchange Act Regulation	117.9
Cash and Securities Segregated under Commodity Exchange Act Regulation, Amount Required to be Segregated	117.9
INTL Trading [Member]
Net Capital	3.4
Minimum Net Capital Required for Entity	1.0
FCC Investments [Member]
Net Capital	0.3
Minimum Net Capital Required for Entity	0.3
FCStone Australia [Member]
Net Capital under Commodity Exchange Act Computation	1.5
Required Net Capital under Commodity Exchange Act	0.8
Net Capital	11.4
Cash and Securities Segregated under Commodity Exchange Act Regulation	25.2
Cash and Securities Segregated under Commodity Exchange Act Regulation, Amount Required to be Segregated	21.4
Capital Required for Capital Adequacy	3.9
INTL FCStone DTVM Ltda [Member]
Net Capital	3.1
Capital Required for Capital Adequacy	0.6
Gainvest S.A. Sociedad Gerente de FCI - Comision Nacional de Valores [Member]
Net Capital under Commodity Exchange Act Computation	0.7
Required Net Capital under Commodity Exchange Act	0.1
Net Capital	4.7
Capital Required for Capital Adequacy	0.2
INTL Capital S.A – Rosario Futures Exchanges [Member] [Domain]
Net Capital	10.6
Capital Required for Capital Adequacy	7.0
INTL Capital S.A. – General Inspector of Justice [Member] [Domain]
Net Capital under Commodity Exchange Act Computation	3.3
Required Net Capital under Commodity Exchange Act	1.8
INTL Capital S.A. – Superintendence of Securities Markets of Buenos Aires [Member] [Domain]
Net Capital under Commodity Exchange Act Computation	3.9
Required Net Capital under Commodity Exchange Act	$ 0.9

Share-Based Compensation - Share-Based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Allocated Share-based Compensation Expense	$ 0.9	$ 1.1

Share-Based Compensation - Stock Option Plan (Details) - shares	Dec. 31, 2014	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	1,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	913,500	913,500

Share-Based Compensation - Share-Based Compensation Table (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
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	913,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1,578,056
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease)	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	(190,398)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period, Net	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	(39,389)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	913,500		913,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1,348,269		1,578,056
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	459,620
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 27.96		$ 25.38
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	0.00
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	7.52
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	0.00
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price	23.41
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	33.98
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Grant Date Fair Value	12.74		$ 11.58
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	0.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Excrecises in Period, Weighted Average Grant Date Fair Value	3.40
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeited in Period, Weighted Average Grant Date Fair Value	0.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expired in Period, Weighted Average Grant Date Fair Value	11.60
Share-based Compensation Arrangement by Share-based Payment Award, Options, Excercisable, Weighted Average Grant Date Fair Value	$ 13.42
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	4 years 6 months 29 days		4 years 1 month 28 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	1 year 5 months 23 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 0.7		$ 1.9
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	0.5
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options	$ 7.4
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	5 years 2 months 9 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	$ 2.2	$ 0.6

Share-Based Compensation - Restricted Stock Plan (Details) - shares	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	1,012,730	1,096,325

Share-Based Compensation - Restricted Stock Plan Table (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted	1,012,730	1,096,325
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	229,851
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Period Increase (Decrease)	(83,923)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	83,923
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	(72,268)
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures	328
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(328)
ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted	1,012,730	1,096,325
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	241,178	229,851
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 18.80	$ 20.03
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	18.37
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	22.23
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 18.12
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	2 years 5 months 27 days	1 year 9 months 15 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value	$ 5.0	$ 4.0
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 3.6
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition - Restricted Stock	2 years 5 months 27 days

Other Expenses - Other Expenses Breakout (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Other Expenses [Abstract]
Accretion Expense	$ 0.1	$ 0.2
General Insurance Expense	0.5	0.5
Advertising Expense	0.6	0.4
Technology Services Costs	1.2	0.7
Supplies and Postage Expense	0.3	0.3
Clearance Fees	0.4	0.4
Taxes, Miscellaneous	1.0	1.0
Other Expenses	1.3	1.2
Other Cost and Expense, Operating	$ 5.4	$ 4.7

Accumulated Other Comprehensive Income (Loss) Rollforward (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, net	$ (10.8)		$ (11.6)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax	0.0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	0.0
Other comprehensive loss	0.8	$ (0.9)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, net	(9.0)		(8.7)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(0.3)
Other comprehensive loss	(0.3)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, net	(3.5)		(3.5)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0.0
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax	0.0
Other comprehensive loss	0.0
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, net	1.7		0.6
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	1.1
Other comprehensive loss	1.1
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, net	(10.8)		$ (11.6)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0.8
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.0
Other comprehensive loss	$ 0.8

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Income Taxes [Abstract]
Deferred Tax Assets, Valuation Allowance	$ 2.8		$ 2.8
Income (Loss) from Continuing Operations before Income Taxes, Domestic			$ 17.3	$ 24.5	$ 21.9
Deferred Tax Liabilities, Gross	3.9
Deferred Tax Liabilities, Unrealized Gains on Trading Securities	1.3
Income Tax Expense (Benefit)	$ 4.2	$ 1.5
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	31.00%	38.00%

Acquisitions Acquisitions (Details) - G.X. Clarke (INTL FCStone Partners) [Member] $ in Millions	Dec. 31, 2014 USD ($)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ 26.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	1.5
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 1.5

Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended
Discontinued Operations (Details) - USD ($) $ in Millions	Dec. 31, 2014	Dec. 31, 2013
Discontinued Operations [Abstract]
Disposal Group, Including Discontinued Operation, Revenue	$ 0.0	$ 29.3
Disposal Group, Including Discontinued Operation, Costs of Goods Sold	0.0	28.8
Disposal Group, Including Discontinued Operation, Gross Profit (Loss)	0.0	0.5
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	0.0	0.1
Discontinued Operation, Tax Effect of Discontinued Operation	0.0	0.0
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 0.0	$ 0.1

Segment Analysis - Reportable Segments (Details)	3 Months Ended
Segment Analysis - Reportable Segments (Details)	Dec. 31, 2014
Segment Analysis [Abstract]
Number of different types of foreign currencies	150

Segment Analysis (Details) - USD ($) $ in Millions	3 Months Ended
Segment Analysis (Details) - USD ($) $ in Millions	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Segment Reporting Information [Line Items]
Revenues	$ 13,627.7	$ 7,908.7
Operating revenues	137.5	112.9
Net operating revenues	93.2	73.4
Net Segment Contribution	69.9	57.2
Segment Income	40.9	29.4
Costs not allocated to operating segments	27.3	25.5
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	13.6	3.9
Assets	3,127.2		$ 3,039.7
Commercial Hedging [Member]
Segment Reporting Information [Line Items]
Revenues	68.4	45.6
Operating revenues	68.4	45.6
Net operating revenues	57.0	36.2
Net Segment Contribution	40.6	26.8
Segment Income	24.9	12.1
Assets	1,398.7		1,400.9
Global Payments [Member]
Segment Reporting Information [Line Items]
Revenues	15.2	13.6
Operating revenues	15.2	13.6
Net operating revenues	13.5	11.8
Net Segment Contribution	10.8	9.2
Segment Income	8.2	7.0
Assets	56.7		51.9
Securities Segment [Member]
Segment Reporting Information [Line Items]
Revenues	17.2	21.4
Operating revenues	17.2	21.4
Net operating revenues	10.0	15.6
Net Segment Contribution	6.6	11.9
Segment Income	1.7	7.2
Assets	220.3		235.5
Physical Commodities [Member]
Segment Reporting Information [Line Items]
Revenues	13,496.7	7,801.0
Operating revenues	6.5	5.2
Net operating revenues	5.6	4.5
Net Segment Contribution	4.4	3.6
Segment Income	2.5	1.8
Assets	136.4		116.8
Clearing and Execution Services Segment [Member]
Segment Reporting Information [Line Items]
Revenues	31.2	27.5
Operating revenues	31.2	27.5
Net operating revenues	9.5	7.1
Net Segment Contribution	7.5	5.7
Segment Income	3.6	1.3
Assets	1,192.7		1,136.2
Corporate [Member]
Segment Reporting Information [Line Items]
Revenues	(1.0)	(0.4)
Operating revenues	(1.0)	(0.4)
Net operating revenues	(2.4)	$ (1.8)
Assets	$ 122.4		$ 98.4