Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Redeemable Noncontrolling Interest	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Nonredeemable Noncontrolling Interests
Beginning balance at Dec. 31, 2017	$ 7,067,009		$ 29,463	$ 818	$ 1,828,131	$ 6,004,506		$ (558,527)	$ (215,766)	$ 7,847
Beginning balance (in shares) at Dec. 31, 2017				81,771					(7,350)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under employee and director stock plans	(8,377)			$ 2	(8,400)				$ 21
Shares issued under employee and director stock plans (in shares)				191					1
Stock-based compensation expense	31,382				31,382
Repurchases of common stock	(274,144)			$ (23)		(274,121)
Repurchases of common stock (in shares)				(2,306)
Accretion of redeemable noncontrolling interest	(3,892)		3,892			(3,892)
Net earnings attributable to noncontrolling interests	677		2,474							677
Purchase of redeemable noncontrolling interest and noncontrolling interest, net of taxes	0		(33,884)		1,060					(1,060)
Currency translation adjustment on noncontrolling interests	(1,219)		(1,945)							(1,219)
Currency translation adjustment	(234,175)							(234,175)
Prior pension and post-retirement benefit service cost and actuarial gain (loss)	1,094							1,094
Net earnings	861,704					861,704
Ending balance at Dec. 31, 2018	7,440,059		0	$ 797	1,852,173	6,588,197		(791,608)	$ (215,745)	6,245
Ending balance (in shares) at Dec. 31, 2018				79,656					(7,349)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under employee and director stock plans	(7,509)			$ 1	(7,543)				$ 33
Shares issued under employee and director stock plans (in shares)				130					1
Stock-based compensation expense	23,620				23,620
Repurchases of common stock	(100,079)			$ (8)		(100,071)
Repurchases of common stock (in shares)				(806)
Net earnings attributable to noncontrolling interests	360									360
Currency translation adjustment on noncontrolling interests	2									2
Currency translation adjustment	28,994							28,994
Prior pension and post-retirement benefit service cost and actuarial gain (loss)	(3,210)							(3,210)
Net earnings	744,211					744,211
Ending balance at Dec. 31, 2019	8,126,448	$ (131)	0	$ 790	1,868,250	7,232,337	$ (131)	(765,824)	$ (215,712)	6,607
Ending balance (in shares) at Dec. 31, 2019				78,980					(7,348)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under employee and director stock plans	(2,740)			$ 1	(2,805)				$ 64
Shares issued under employee and director stock plans (in shares)				152					2
Stock-based compensation expense	19,697				19,697
Repurchases of common stock	(188,625)			$ (15)		(188,610)
Repurchases of common stock (in shares)				(1,508)
Net earnings attributable to noncontrolling interests	132									132
Currency translation adjustment on noncontrolling interests	103									103
Currency translation adjustment	72,853							72,853
Prior pension and post-retirement benefit service cost and actuarial gain (loss)	(2,174)							(2,174)
Net earnings	515,595					515,595
Ending balance at Dec. 31, 2020	$ 8,541,158		$ 0	$ 776	$ 1,885,142	$ 7,559,191		$ (695,145)	$ (215,648)	$ 6,842
Ending balance (in shares) at Dec. 31, 2020				77,624					(7,346)