Consolidated Cash Flows Statements (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income	$ 19.3	$ 19.3	$ 12.7
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	7.3	8.0	7.2
Provision for bad debts and impairments	5.5	0.8	1.7
Deferred income taxes	(6.8)	(7.8)	(0.3)
Amortization of debt issuance costs and debt discount	1.0	1.2	1.7
Amortization of share-based compensation expense	4.3	9.3	5.9
Loss on sale of property and equipment	0.3	0.4	0
Gain on disposal of affiliate	0	(0.4)	0
Gain on sale of exchange memberships and common stock	0	(9.1)	0
Changes in operating assets and liabilities, net:
Cash, securities and other assets segregated under federal and other regulations	(1.3)	(95.1)	(199.9)
Deposits and receivables from exchange-clearing organizations	(159.2)	42.3	(97.7)
Deposits and receivables from broker-dealers, clearing organizations, and counterparties	1.1	(53.4)	46.2
Receivable from customers, net	32.0	(23.7)	46.4
Notes receivable, net	(27.9)	66.6	(77.9)
Income taxes receivable	4.2	(0.2)	(3.1)
Financial instruments owned, at fair value	(42.6)	3.1	58.3
Physical commodities inventory	17.8	72.7	29.0
Other assets	0.1	4.3	(1.6)
Accounts payable and other accrued liabilities	1.9	(0.2)	10.6
Payable to customers	191.5	24.0	248.0
Payable to broker-dealers, clearing organizations and counterparties	(5.2)	(22.3)	35.9
Income taxes payable	5.2	0.5	0.3
Financial instruments sold, not yet purchased, at fair value	84.1	4.6	(215.5)
Net cash provided by (used in) operating activities	132.6	44.9	(92.1)
Cash flows from investing activities:
Disposal and deconsolidation of affiliates	0	0.2	0.4
Cash paid for acquisitions, net	0	0	(11.7)
Purchase of exchange memberships and common stock	0	(0.3)	0
Sale of exchange memberships and common stock	0	10.1	0
Purchase of property and equipment	(4.3)	(4.9)	(8.7)
Net cash (used in) provided by investing activities	(4.3)	5.1	(20.0)
Cash flows from financing activities:
Net change in payable to lenders under loans	(38.5)	(157.2)	140.8
Payments related to earn-outs on acquisitions	(1.6)	(12.0)	(9.6)
Proceeds from issuance of senior unsecured notes	0	45.5	0
Share repurchase	(9.7)	(3.9)	(4.0)
Debt issuance costs	(0.3)	(3.7)	(0.3)
Exercise of stock options	1.4	1.5	1.9
Income tax benefit on stock options and awards	(0.1)	0.1	0.2
Net cash (used in) provided by financing activities	(48.8)	(129.7)	129.0
Effect of exchange rates on cash and cash equivalents	(4.3)	(0.5)	(1.2)
Net increase (decrease) in cash and cash equivalents	75.2	(80.2)	15.7
Cash and cash equivalents at beginning of period	156.1	236.3	220.6
Cash and cash equivalents at end of period	231.3	156.1	236.3
Supplemental disclosure of cash flow information:
Cash paid for interest	9.6	8.9	7.9
Income taxes paid, net of cash refunds	3.0	10.2	6.1
Supplemental disclosure of non-cash investing and financing activities:
Identified intangible assets and goodwill on acquisitions	0.5	5.6	1.8
Additional consideration payable related to acquisitions	$ (1.8)	$ 8.2	$ 2.1