Condensed Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows — operating activities:
Net income	$ 100.4	$ 93.2
Depreciation and amortization	32.0	33.2
Net gains on investments	(45.7)	(70.0)
Amortization of share based compensation	4.3	5.9
Equity in earnings of unconsolidated affiliates	(5.4)	(5.6)
Dividends from unconsolidated affiliates	0.6	0.2
Deferred income taxes	(2.0)	(1.0)
Changes in accounts receivable	(29.3)	4.0
Changes in other assets	(3.7)	(10.3)
Changes in accounts payable and accrued liabilities	(0.5)	(5.8)
Changes in income taxes payable	51.9	25.4
Changes in deferred revenues and gains	5.7	11.1
Changes in accrued compensation and benefits	(50.8)	(43.9)
Other, net	13.8	5.8
Net cash provided from operating activities	71.3	42.2
Cash flows — investing activities:
Capital expenditures	(31.4)	(27.6)
Investments in securities	(27.9)	(31.7)
Proceeds from sales/maturities of investments	82.7	133.6
Net decrease in restricted cash and cash equivalents held to satisfy client funds obligations	12.9	44.8
Other, net	1.2	(14.7)
Net cash provided from investing activities	37.5	104.4
Cash flows — financing activities:
Proceeds from issuance of common stock	8.7	12.2
Principal payments on debt	(3.2)	(15.1)
Net borrowings (payments) on revolving credit facilities	(10.4)	40.5
Net decrease in client funds obligations	(12.9)	(65.5)
Common stock repurchased	(5.5)	(74.1)
Payment of cash dividends	(12.6)	(13.3)
Excess tax benefits from share based compensation	4.7	1.2
Net cash used for financing activities	(31.2)	(114.1)
Net increase in cash and cash equivalents	77.6	32.5
Cash and cash equivalents, beginning of period	62.5	88.3
Cash and cash equivalents, end of period	$ 140.1	$ 120.8