Condensed Consolidated Income Statements Statement (USD $) In Millions, except Share data	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues:
Sales of physical commodities	$ 20,464.7	$ 14,122.0	$ 51,179.9	$ 31,067.4
Trading gains	70.0	33.5	117.9	61.0
Commission and clearing fees	31.1	30.3	105.6	87.8
Consulting and management fees	5.2	4.7	15.2	12.7
Interest income	2.3	1.6	7.8	4.7
Other income	0.1	0.3	0.8	0.4
Total revenues	20,573.4	14,192.4	51,427.2	31,234.0
Cost of sales of physical commodities	20,468.0	14,114.2	51,112.1	31,030.9
Operating revenues	105.4	78.2	315.1	203.1
Interest expense	2.0	2.7	9.1	7.5
Net revenues	103.4	75.5	306.0	195.6
Non-interest expenses:
Compensation and benefits	44.0	25.9	129.6	73.0
Clearing and related expenses	18.0	17.9	58.4	51.7
Communication and data services	4.2	2.6	11.1	7.9
Introducing broker commissions	6.3	5.2	17.7	14.1
Occupancy and equipment rental	2.1	1.5	6.1	4.5
Professional fees	2.9	1.9	6.9	5.6
Depreciation and amortization	1.3	0.4	3.4	0.8
Bad debts and impairments	1.2	2.1	5.7	2.3
Other	6.1	4.6	20.6	13.1
Total non-interest expenses	86.1	62.1	259.5	173.0
Income from continuing operations, before tax	17.3	13.4	46.5	22.6
Income tax expense	7.0	4.8	17.1	8.1
Income from continuing operations	10.3	8.6	29.4	14.5
Income from discontinued operations, net of tax	0	(1.1)	0.2	(0.7)
Income before extraordinary loss	10.3	7.5	29.6	13.8
Extraordinary loss	0	(0.8)	0	(4.2)
Net income	10.3	6.7	29.6	9.6
Add: Net loss attributable to noncontrolling interests	0.1	0	0.2	0.3
Net income attributable to INTL FCStone Inc. common stockholders	10.4	6.7	29.8	9.9
Basic earnings per share:
Income from continuing operations attributable to INTL FCStone Inc. common stockholders	$ 0.58	$ 0.5	$ 1.67	$ 0.85
Income from discontinued operations attributable to INTL FCStone Inc. common stockholders	$ 0.00	$ (0.06)	$ 0.01	$ (0.04)
Extraordinary loss attributable to INTL FCStone Inc. common stockholders	$ 0.00	$ (0.05)	$ 0.00	$ (0.24)
Net income attributable to INTL FCStone Inc. common stockholders	$ 0.58	$ 0.39	$ 1.68	$ 0.57
Diluted earnings per share:
Income from continuing operations attributable to INTL FCStone Inc. common stockholders	$ 0.55	$ 0.48	$ 1.56	$ 0.83
Income from discontinued operations attributable to INTL FCStone Inc. common stockholders	$ 0.00	$ (0.06)	$ 0.01	$ (0.04)
Extraordinary loss attributable to INTL FCStone Inc. common stockholders	$ 0.00	$ (0.04)	$ 0.00	$ (0.24)
Net income attributable to INTL FCStone Inc. common stockholders	$ 0.55	$ 0.38	$ 1.57	$ 0.55
Weighted-average number of common shares outstanding:
Basic	17,901,613	17,335,362	17,714,916	17,293,058
Diluted	19,280,696	18,527,376	19,308,661	17,841,999
Amounts attributable to INTL FCStone Inc. common stockholders:
Income from continuing operations, net of tax	10.4	8.6	29.6	14.8
Income from discontinued operations, net of tax	0	(1.1)	0.2	(0.7)
Extraordinary loss	0	(0.8)	0	(4.2)
Net Income	$ 10.4	$ 6.7	$ 29.8	$ 9.9