Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities
Net income	$ 473.4	$ 428.9
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	30.4	30.1
Amortization	60.9	55.5
Stock compensation expense	15.3	20.6
Gain on revaluation of equity interest (Note 3)	(29.4)	0
Other non-cash items, net	(11.7)	(4.9)
Increase/(decrease) in cash, excluding the effects of acquisitions, resulting from changes in:
Other assets	(3.4)	64.2
Accounts payable and accrued liabilities	(48.4)	(36.3)
Income taxes payable (Note 13)	42.4	(213.5)
Other liabilities	(23.2)	(18.5)
Net cash provided by operating activities	506.3	326.1
Cash flows from investing activities
Capitalization of contract costs	(44.8)	(13.0)
Capitalization of purchased and developed software	(4.0)	(9.8)
Purchases of property and equipment	(26.6)	(20.8)
Acquisition of business	(135.7)	0
Repayments of notes receivable issued to agents	0	16.9
Net cash used in investing activities	(211.1)	(26.7)
Cash flows from financing activities
Proceeds from exercise of options	91.6	11.9
Cash dividends paid	(95.0)	(80.1)
Common stock repurchased	(658.5)	(417.1)
Net proceeds from issuance of borrowings	299.0	247.5
Net cash used in financing activities	(362.9)	(237.8)
Net change in cash and cash equivalents	(67.7)	61.6
Cash and cash equivalents at beginning of period	2,157.4	1,685.2
Cash and cash equivalents at end of period	2,089.7	1,746.8
Supplemental cash flow information:
Interest paid	101.0	77.8
Income taxes paid (Note 13)	94.3	341.4
Non-cash exchange of 5.400% notes due 2011 for 5.253% notes due 2020	$ 0	$ 303.7