Regulatory Requirements and Subsidiary Dividend Restrictions (Tables)

12 Months Ended

Sep. 30, 2012

Capital and Other Regulatory Requirements [Abstract]

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

Excluding INTL FCStone DTVM, all other subsidiaries of the Company are in compliance with all of their regulatory requirements as of September 30, 2012, as follows:

(in millions)			As of September 30, 2012
Subsidiary	Regulatory Authority	Requirement Type	Actual		Minimum Requirement
FCStone, LLC	CFTC	Net capital	$	124.3	$	86.3
FCStone, LLC	CFTC	Segregated funds	$	1,665.5	$	1,620.5
FCStone, LLC	CFTC	Secured funds	$	89.3	$	77.6
INTL FCStone (Europe)	FSA	Net capital	$	35.0	$	18.8
INTL FCStone (Europe)	FSA	Segregated funds	$	26.4	$	26.4
INTL Global Currencies Limited	FSA	Net capital	$	7.6	$	1.2
TRX Futures Limited	FSA	Capital adequacy	$	8.5	$	4.3
INTL FCStone Securities Inc.	SEC	Net capital	$	2.0	$	1.0
FCC Investments, Inc.	SEC	Net capital	$	0.4	$	0.3
FCStone Australia	Australian Securities and Investment Commission	Net capital	$	1.9	$	1.0
FCStone Australia	New Zealand Clearing Ltd	Capital adequacy	$	11.5	$	1.3
FCStone Europe	Central Bank of Ireland	Net capital	$	1.8	$	0.4

Schedule of Regulatory Assets [Table Text Block]

(in millions)	September 30, 2012		September 30, 2011
Cash, at banks - segregated	$	225.6	$	71.3
Securities - customer segregated	—		5.5
Securities held for customers in lieu of cash, at banks	47.2		3.7
Deposits with and receivables from:
Exchange-clearing organizations, including securities, net of omnibus eliminations	1,370.4		1,358.0
Securities held for customers in lieu of cash	22.3		19.0
Total customer-segregated funds	1,665.5		1,457.5
Amount required to be segregated	1,620.5		1,406.6
Excess funds in segregation	$	45.0	$	50.9

Funds deposited by customers and other assets, which are held in separate accounts for customers trading foreign futures and foreign options customers, as of September 30, 2012 and 2011 are as follows:

(in millions)	September 30, 2012		September 30, 2011
Cash - secured	$	25.2	$	6.4
Securities	3.3		—
Equities with futures commission merchants	9.9		30.3
Amounts held by clearing organizations of foreign boards of trade	20.8		—
Amounts held by members of foreign boards of trade	30.1		2.1
Total customer-secured funds	89.3		38.8
Amount required to be secured	77.6		27.2
Excess secured funds	$	11.7	$	11.6