Condensed Consolidated Income Statements (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Sales of physical commodities	$ 10,918.9	$ 17,201.0	$ 36,506.5	$ 51,238.5
Trading gains	61.7	94.8	200.5	206.2
Commission and clearing fees	46.8	45.4	130.2	118.9
Consulting and management fees	9.4	7.1	25.4	20.6
Interest income	2.6	2.7	9.0	7.7
Other income	0.1	0.1	0.5	0.6
Total revenues	11,039.5	17,351.1	36,872.1	51,592.5
Cost of sales of physical commodities	10,917.4	17,227.3	36,507.0	51,252.8
Operating revenues	122.1	123.8	365.1	339.7
Interest expense	3.2	2.6	9.6	8.3
Net revenues	118.9	121.2	355.5	331.4
Non-interest expenses:
Compensation and benefits	52.2	54.6	150.9	155.5
Clearing and related expenses	29.4	30.6	83.5	80.4
Introducing broker commissions	11.0	7.9	29.0	21.7
Communication and data services	5.9	6.3	17.0	16.5
Occupancy and equipment rental	2.9	2.7	9.0	8.2
Professional fees	2.9	3.3	10.1	9.6
Depreciation and amortization	2.0	1.9	6.1	5.3
Bad debts and impairments	0.1	0.6	0.2	0.6
Other	8.4	7.4	25.4	24.8
Total non-interest expenses	114.8	115.3	331.2	322.6
Income from continuing operations, before tax	4.1	5.9	24.3	8.8
Income tax expense	1.3	1.2	6.7	2.2
Net income (loss)	2.8	4.7	17.6	6.6
Add: Net loss attributable to noncontrolling interests	0	0	0	0.1
Net income attributable to INTL FCStone Inc. common stockholders	$ 2.8	$ 4.7	$ 17.6	$ 6.7
Basic earnings per share:
Net income attributable to INTL FCStone Inc. common stockholders	$ 0.15	$ 0.24	$ 0.92	$ 0.35
Diluted earnings per share:
Net income attributable to INTL FCStone Inc. common stockholders	$ 0.15	$ 0.23	$ 0.90	$ 0.33
Weighted-average number of common shares outstanding:
Basic	18,480,644	18,392,823	18,377,965	18,286,308
Diluted	18,864,040	19,098,667	18,862,872	19,156,471