CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Cash flows from operating activities
Net income	$ 537.7		$ 479.9
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	69.7		58.5
Stock-based compensation expense	46.3		43.2
Deferred income taxes	29.8		12.8
Excess tax benefits from stock-based compensation plans	(11.8)		(6.0)
Legacy Tax Matters	(12.8)	[1]	(6.4)	[1]
Changes in assets and liabilities:
Accounts receivable	(57.0)		97.5
Other current assets	8.9		77.5
Other assets	2.5		8.7
Accounts payable and accrued liabilities	(48.5)		(71.0)
Restructuring	(0.1)		(0.1)
Deferred revenue	(2.7)		(26.3)
Unrecognized tax benefits	(61.5)		(0.1)
Other liabilities	(4.5)		(1.9)
Net cash provided by operating activities	496.0		666.3
Cash flows from investing activities
Capital additions	(35.2)		(53.6)
Purchases of short-term investments	(47.8)		(28.9)
Sales and maturities of short-term investments	40.4		27.3
Acquisitions	(3.5)		(10.1)
Net cash used in investing activities	(46.1)		(65.3)
Cash flows from financing activities
Issuance of notes	496.1
Repayments of notes	(39.4)		(7.5)
Net proceeds from stock-based compensation plans	71.9		37.6
Cost of treasury shares repurchased	(125.1)		(333.8)
Excess tax benefits from stock-based compensation plans	11.8		6.0
Payment of dividends	(107.3)		(89.9)
Payment of dividends to noncontrolling interests	(6.8)		(4.8)
Contingent consideration paid	(0.5)
Debt issuance costs and related fees	(6.3)
Net cash provided by (used in) financing activities	294.4		(392.4)
Effect of exchange rate changes on cash and cash equivalents	14.2		(14.0)
Net increase in cash and cash equivalents	758.5		194.6
Cash and cash equivalents, beginning of the period	760.0		659.6
Cash and cash equivalents, end of the period	$ 1,518.5		$ 854.2

[1] The 2012 amount represents a reversal of a liability of $12.8 million relating to the favorable resolution of a Legacy Tax Matter for the 2005 and 2006 tax years. The 2011 amounts represent a reversal of a liability relating to the lapse of the statute of limitations for a Legacy Tax Matter.