Condensed Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional paid-in capital	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive loss	Total shareholders' equity	Total shareholders' equity Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling interest
Balance at Dec. 31, 2019	$ 2,197,219	$ 6,074	$ 1,696	$ 3,203	$ 2,321,316	$ 6,074	$ (131,187)	$ 2,195,028	$ 6,074	$ 2,191
Balance (in shares) at Dec. 31, 2019			169,622
Increase (Decrease) in Equity [Roll Forward]
Shares issued under employee stock plans	163,450		$ 40	163,410				163,450
Shares issued under employee stock plans (in shares)			4,009
Shares repurchased under provisions of stock repurchase plan	(314,225)		$ (44)	(66,780)	(247,401)			(314,225)
Shares repurchased under provisions of stock repurchase plan (in shares)			(4,400)
Stock compensation expense	45,091			45,091				45,091
Net earnings	498,689				497,520			497,520		1,169
Other comprehensive income loss	(5,010)						(4,094)	(4,094)		(916)
Dividends paid	(86,815)			1,000	(87,815)			(86,815)
Balance at Sep. 30, 2020	2,504,473		$ 1,692	145,924	2,489,694		(135,281)	2,502,029		2,444
Balance (in shares) at Sep. 30, 2020			169,231
Balance at Jun. 30, 2020	2,161,598		$ 1,668	12,221	2,298,387		(153,158)	2,159,118		2,480
Balance (in shares) at Jun. 30, 2020			166,816
Increase (Decrease) in Equity [Roll Forward]
Shares issued under employee stock plans	121,430		$ 24	121,406				121,430
Shares issued under employee stock plans (in shares)			2,415
Stock compensation expense	12,297			12,297				12,297
Net earnings	191,719				191,307			191,307		412
Other comprehensive income loss	17,429						17,877	17,877		(448)
Balance at Sep. 30, 2020	2,504,473		$ 1,692	145,924	2,489,694		(135,281)	2,502,029		2,444
Balance (in shares) at Sep. 30, 2020			169,231
Balance at Dec. 31, 2020	$ 2,663,227		$ 1,693	157,496	2,600,201		(99,753)	2,659,637		3,590
Balance (in shares) at Dec. 31, 2020	169,294		169,294
Increase (Decrease) in Equity [Roll Forward]
Shares issued under employee stock plans	$ 84,261		$ 21	84,240				84,261
Shares issued under employee stock plans (in shares)			2,136
Shares repurchased under provisions of stock repurchase plan	(225,064)		$ (20)	(225,044)				(225,064)
Shares repurchased under provisions of stock repurchase plan (in shares)			(2,038)
Stock compensation expense	57,298			57,298				57,298
Net earnings	964,834				962,660			962,660		2,174
Other comprehensive income loss	(23,946)						(23,047)	(23,047)		(899)
Dividends paid	(98,387)			935	(99,322)			(98,387)
Distribution to noncontrolling interest	(1,631)									(1,631)
Balance at Sep. 30, 2021	$ 3,420,592		$ 1,694	74,925	3,463,539		(122,800)	3,417,358		3,234
Balance (in shares) at Sep. 30, 2021	169,392		169,392
Balance at Jun. 30, 2021	$ 3,083,651		$ 1,692	79,357	3,104,471		(106,066)	3,079,454		4,197
Balance (in shares) at Jun. 30, 2021			169,169
Increase (Decrease) in Equity [Roll Forward]
Shares issued under employee stock plans	56,961		$ 8	56,953				56,961
Shares issued under employee stock plans (in shares)			836
Shares repurchased under provisions of stock repurchase plan	(76,595)		$ (6)	(76,589)				(76,595)
Shares repurchased under provisions of stock repurchase plan (in shares)			(613)
Stock compensation expense	15,204			15,204				15,204
Net earnings	359,910				359,068			359,068		842
Other comprehensive income loss	(16,908)						(16,734)	(16,734)		(174)
Distribution to noncontrolling interest	(1,631)									(1,631)
Balance at Sep. 30, 2021	$ 3,420,592		$ 1,694	$ 74,925	$ 3,463,539		$ (122,800)	$ 3,417,358		$ 3,234
Balance (in shares) at Sep. 30, 2021	169,392		169,392