Condensed Consolidated Statements of Stockholders' Investment - USD ($) shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)		129,186			129,186
Beginning balance	$ 2,095,502	$ 2,021,934	$ 1,868,187	$ 1,879,933	$ 2,021,934	$ 1,879,933
Net income	348,185	270,348	193,789	173,305	$ 618,533	367,094
Foreign currency adjustments	(33,596)	6,870	(162)	(7,286)
Dividends declared	(71,506)	(72,542)	(69,094)	(69,606)
Stock issued for employee benefit plans	20,886	8,904	16,594	(3,003)
Issuance of restricted stock, net of forfeitures				0
Stock-based compensation expense	27,929	24,606	29,161	23,989
Repurchase of common stock	$ (334,985)	(164,618)	(132,305)	(129,145)
Ending balance (in shares)	125,116				125,116
Ending balance	$ 2,052,415	$ 2,095,502	$ 1,906,170	$ 1,868,187	$ 2,052,415	$ 1,906,170
Dividends declared, per share (in dollars per share)	$ 0.55	$ 0.55	$ 0.51	$ 0.51
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	128,011	129,186	133,243	134,298	129,186	134,298
Beginning balance	$ 12,801	$ 12,919	$ 13,324	$ 13,430	$ 12,919	$ 13,430
Stock issued for employee benefit plans (in shares)	316	418	250	357
Stock issued for employee benefit plans	$ 31	$ 42	$ 25	$ 36
Issuance of restricted stock, net of forfeitures (in shares)				(26)
Issuance of restricted stock, net of forfeitures				$ (3)
Stock-based compensation expense (in shares)	0	0	0	0
Stock-based compensation expense	$ 0	$ 0	$ 0	$ 0
Repurchase of common stock (in shares)	(3,211)	(1,593)	(1,358)	(1,386)
Repurchase of common stock	$ (320)	$ (160)	$ (136)	$ (139)
Ending balance (in shares)	125,116	128,011	132,135	133,243	125,116	132,135
Ending balance	$ 12,512	$ 12,801	$ 13,213	$ 13,324	$ 12,512	$ 13,213
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	680,857	673,628	568,209	566,022	673,628	566,022
Stock issued for employee benefit plans	377	(17,377)	418	(21,805)
Issuance of restricted stock, net of forfeitures				3
Stock-based compensation expense	27,929	24,606	29,161	23,989
Ending balance	709,163	680,857	597,788	568,209	709,163	597,788
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	5,134,667	4,936,861	4,476,532	4,372,833	4,936,861	4,372,833
Net income	348,185	270,348	193,789	173,305
Dividends declared	(71,506)	(72,542)	(69,094)	(69,606)
Ending balance	5,411,346	5,134,667	4,601,227	4,476,532	5,411,346	4,601,227
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(54,264)	(61,134)	(53,284)	(45,998)	(61,134)	(45,998)
Foreign currency adjustments	(33,596)	6,870	(162)	(7,286)
Ending balance	(87,860)	(54,264)	(53,446)	(53,284)	(87,860)	(53,446)
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(3,678,559)	(3,540,340)	(3,136,594)	(3,026,354)	(3,540,340)	(3,026,354)
Stock issued for employee benefit plans	20,478	26,239	16,151	18,766
Stock-based compensation expense	0	0	0	0
Repurchase of common stock	(334,665)	(164,458)	(132,169)	(129,006)
Ending balance	$ (3,992,746)	$ (3,678,559)	$ (3,252,612)	$ (3,136,594)	$ (3,992,746)	$ (3,252,612)