Segment and Geographic Information (Tables)

12 Months Ended

Sep. 30, 2012

Segment Analysis [Abstract]

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

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

	Year Ended September 30,
(in millions)	2012			2011		2010
Total revenues:
Commodity and Risk Management Services	$	68,928.3		$	75,274.1	$	46,785.2
Foreign Exchange	62.6			59.3		47.5
Securities	39.9			30.5		20.8
Clearing and Execution Services	93.8			66.1		61.8
Other	136.2			67.2		24.8
Corporate unallocated	(0.2		)	0.4		0.2
Total	$	69,260.6		$	75,497.6	$	46,940.3
Operating revenues (loss):
Commodity and Risk Management Services	$	246.0		$	252.6	$	129.8
Foreign Exchange	62.6			59.3		47.5
Securities	39.9			30.5		20.8
Clearing and Execution Services	93.8			66.1		61.8
Other	15.6			14.3		8.9
Corporate unallocated	(0.2		)	0.4		0.2
Total	$	457.7		$	423.2	$	269.0
Net contribution:
(Revenues less cost of sales, clearing and related expenses, variable bonus compensation, introducing broker commissions and interest expense):
Commodity and Risk Management Services	$	143.0		$	151.6	$	70.9
Foreign Exchange	41.3			37.1		28.0
Securities	19.8			16.5		11.4
Clearing and Execution Services	14.3			14.3		10.7
Other	10.3			10.0		7.1
Total	$	228.7		$	229.5	$	128.1
Net segment income:
(Net contribution less non-variable direct segment costs):
Commodity and Risk Management Services	$	69.7		$	93.5	$	32.8
Foreign Exchange	28.3			28.0		21.8
Securities	4.5			1.9		5.6
Clearing and Execution Services	2.2			4.9		1.1
Other	5.4			5.6		3.7
Total	$	110.1		$	133.9	$	65.0
Reconciliation of segment income to income from continuing operations, before tax:
Net segment income	$	110.1		$	133.9	$	65.0
Costs not allocated to operating segments	90.8			74.4		47.1
Income from continuing operations, before tax	$	19.3		$	59.5	$	17.9
(in millions)	As of September 30, 2012			As of September 30, 2011
Total assets:
Commodity and Risk Management Services	$	1,449.2		$	1,540.8
Foreign Exchange	124.5			146.1
Securities	88.7			104.8
Clearing and Execution Services	1,090.9			734.4
Other	110.8			43.4
Corporate unallocated	94.8			66.2
Total	$	2,958.9		$	2,635.7

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

Information regarding revenues and operating revenues for the years ended September 30, 2012, 2011 and 2010, and information regarding long-lived assets (defined as property, equipment, leasehold improvements and software) as of September 30, 2012 and 2011 in geographic areas were as follows:

	Year Ended September 30,
(in millions)	2012		2011		2010
Total revenues:
United States	$	55,564.8	$	53,660.2	$	31,962.7
Europe	69.9		35.1		20.4
South America	58.2		53.3		17.8
Asia	13,555.3		21,738.4		14,926.6
Other	12.4		10.6		12.8
Total	$	69,260.6	$	75,497.6	$	46,940.3
Operating revenues:
United States	$	297.3	$	302.1	$	213.4
Europe	69.9		35.1		20.4
South America	58.2		53.3		17.8
Asia	19.9		27.6		14.4
Other	12.4		5.1		3.0
Total	$	457.7	$	423.2	$	269.0
(in millions)	As of September 30, 2012		As of September 30, 2011
Long-lived assets, as defined:
United States	$	11.5	$	10.7
Europe	3.8		2.0
South America	2.8		1.6
Asia	0.7		0.6
Other	0.1		0.1
Total	$	18.9	$	15.0