Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Net Income	$ 596.0	$ 504.7
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred sales commissions	34.2	32.9
Depreciation and other amortization	25.1	21.0
Stock-based compensation	30.9	27.6
Excess tax benefit from stock-based compensation	(2.8)	(5.7)
Gains on sale of assets	(20.2)	(20.6)
Income from investments in equity method investees	(24.9)	(21.8)
Net (gains) losses on other investments of consolidated sponsored investment products	16.2	(14.1)
Net (gains) losses of consolidated variable interest entities	(6.6)	17.5
Other	(2.2)	3.6
Changes in operating assets and liabilities:
Increase in receivables, prepaid expenses and other	(126.2)	(56.1)
Increase in trading securities, net	(36.8)	(66.4)
Increase in trading securities of consolidated sponsored investment products, net	(230.4)	(10.5)
Decrease in accrued compensation and benefits	(193.9)	(162.7)
Increase (decrease) in commissions payable	16.4	(109.3)
Increase in income taxes payable	194.5	149.4
Increase (decrease) in other liabilities	55.4	(3.1)
Net cash provided by operating activities	324.7	286.4
Net cash provided by investing activities
Purchase of investments	(80.1)	(78.4)
Liquidation of investments	194.1	237.5
Purchase of investments by consolidated sponsored investment products	(95.2)	(41.8)
Liquidation of investments by consolidated sponsored investment products	32.1	48.6
Purchase of investments by consolidated variable interest entities	(45.0)	(243.1)
Liquidation of investments by consolidated variable interest entities	128.0	140.6
Decrease (increase) in loans receivable, net	30.9	(24.9)
Additions of property and equipment, net	(15.0)	(12.3)
Acquisition of subsidiary, net of cash acquired	0	5.7
Increase (decrease) in cash from net consolidation (deconsolidation) of sponsored investment products	(34.0)	2.6
Net cash provided by investing activities	115.8	34.5
Net cash provided by (used in) financing activities
Increase in deposits	66.5	213.5
Issuance of common stock	7.2	11.4
Dividends paid on common stock	(64.1)	(757.9)
Repurchase of common stock	(137.1)	(98.0)
Excess tax benefit from stock-based compensation	2.8	5.7
Payments on debt	0	(479.4)
Proceeds from issuance of debt by consolidated sponsored investment products	190.3	133.5
Payments on debt by consolidated sponsored investment products	(176.8)	(146.7)
Payments on debt by consolidated variable interest entities	(60.0)	(40.4)
Payments on contingent consideration liability	(2.7)	0
Noncontrolling interests	101.4	17.9
Net cash used in financing activities	(72.5)	(1,140.4)
Effect of exchange rate changes on cash and cash equivalents	8.6	10.8
Increase (decrease) in cash and cash equivalents	376.6	(808.7)
Cash and cash equivalents, beginning of period	6,323.1	6,051.4
Cash and Cash Equivalents, End of Period	6,699.7	5,242.7
Supplemental Disclosure of Non-Cash Activities
Transfer of loans receivable, net to loans held for sale	189.2	0
Contingent consideration liability recognized due to acquisition	0	90.6
Increase in noncontrolling interests due to acquisition	0	38.2
Increase in noncontrolling interests due to net consolidation of sponsored investment products	0	4.1
Supplemental Disclosure of Cash Flow Information
Cash paid for income taxes	68.0	61.6
Cash paid for interest	14.2	19.4
Cash paid for interest by consolidated sponsored investment products and consolidated variable interest entities	$ 11.9	$ 11.4