CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Millions, unless otherwise specified	Total	Total Stockholders' Equity	Common Stock	Treasury Stock	Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interest	Comprehensive Income
Balance at Dec. 31, 2010	$ 4,433.4	$ 4,050.4	$ 0.7		$ 2,732.2	$ 1,370.8	$ (53.3)	$ 383.0
Increase (decrease) in equity
Net earnings	332.6	282.0				282.0		50.6	332.6
Other comprehensive income
Foreign currency translation adjustment - net of taxes	25.2	24.5					24.5	0.7	25.2
Unrealized gain on securities - net of taxes	1.2	1.2					1.2		1.2
Defined benefit plan - net of taxes	0.8	0.8					0.8		0.8
Comprehensive income	359.8	308.5						51.3	359.8
Issuance of $0.01 par value common stock under employee stock plans	2.9	2.9			2.9
Stock-based compensation expense	2.4	2.4			2.4
Excess tax benefit from stock-based compensation	6.0	6.0			6.0
Cash dividends ($0.40 per share and $0.10 per share for the three months ended March 31, 2012 and 2011, respectively)	(7.1)	(7.1)				(7.1)
Declaration of distribution payable	(6.3)							(6.3)
Effect of exchange rates changes	0.5							0.5
Balance at Mar. 31, 2011	4,791.6	4,363.1	0.7		2,743.5	1,645.7	(26.8)	428.5
Balance at Dec. 31, 2011	4,932.9	4,547.0	0.7	(1,000.2)	2,804.8	2,841.0	(99.3)	385.9
Increase (decrease) in equity
Net earnings	431.7	368.4				368.4		63.3	431.7
Other comprehensive income
Foreign currency translation adjustment - net of taxes	26.1	25.6					25.6	0.5	26.1
Unrealized gain on securities - net of taxes	0.7	0.7					0.7		0.7
Defined benefit plan - net of taxes	1.0	1.0					1.0		1.0
Comprehensive income	459.5	395.7						63.8	459.5
Issuance of $0.01 par value common stock under employee stock plans	3.5	3.5			3.5
Stock-based compensation expense	2.5	2.5			2.5
Excess tax benefit from stock-based compensation	9.4	9.4			9.4
Cash dividends ($0.40 per share and $0.10 per share for the three months ended March 31, 2012 and 2011, respectively)	(26.2)	(26.2)				(26.2)
Declaration of distribution payable	(20.9)							(20.9)
Effect of exchange rates changes	0.2							0.2
Balance at Mar. 31, 2012	$ 5,360.9	$ 4,931.9	$ 0.7	$ (1,000.2)	$ 2,820.2	$ 3,183.2	$ (72.0)	$ 429.0