CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member] Scenario, Previously Reported [Member]	Common Stock [Member] Revision of Prior Period, Accounting Standards Update, Adjustment [Member]	Common Stock [Member]	Capital In Excess Of Par Value [Member] Scenario, Previously Reported [Member]	Capital In Excess Of Par Value [Member] Revision of Prior Period, Accounting Standards Update, Adjustment [Member]	Capital In Excess Of Par Value [Member]	Retained Earnings [Member] Scenario, Previously Reported [Member]	Retained Earnings [Member] Revision of Prior Period, Accounting Standards Update, Adjustment [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Scenario, Previously Reported [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Revision of Prior Period, Accounting Standards Update, Adjustment [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Scenario, Previously Reported [Member]	Revision of Prior Period, Accounting Standards Update, Adjustment [Member]	Total
Beginning balance, shares at Dec. 31, 2017	132,324	0	132,324
Balance at beginning of period at Dec. 31, 2017	$ 132,324	$ 0	$ 132,324	$ 2,805,587	$ 0	$ 2,805,587	$ 2,180,448	$ 29,629	$ 2,210,077	$ (149,466)	$ (29,629)	$ (179,095)	$ 4,968,893	$ 0	$ 4,968,893
Net earnings			$ 0			0			515,805			0			515,805
Share-based compensation plans, net of shares withheld for taxes, shares			630
Share-based compensation plans, net of shares withheld for taxes			$ 630			(32,428)			0			0			(31,798)
Purchase and retirement of common stock, shares			(1,192)
Purchase and retirement of common stock			$ (1,192)			0			(132,791)			0			(133,983)
Share-based compensation expense			0			25,215			0			0			25,215
Cash dividends on common stock			0			0			(148,109)			0			(148,109)
Other comprehensive income (loss)			0			0			0			6,880			6,880
Other			$ 0			112			(112)			0			0
Ending balance, shares at Dec. 31, 2018			131,762
Balance at end of period at Dec. 31, 2018			$ 131,762			2,798,486			2,444,870			(172,215)			5,202,903
Net earnings			$ 0			0			617,662			0			617,662
Share-based compensation plans, net of shares withheld for taxes, shares			628
Share-based compensation plans, net of shares withheld for taxes			$ 628			(39,080)			0			0			(38,452)
Purchase and retirement of common stock, shares			(19)
Purchase and retirement of common stock			$ (19)			0			(2,583)			0			(2,602)
Share-based compensation expense			0			31,843			0			0			31,843
Cash dividends on common stock			0			0			(163,973)			0			(163,973)
Other comprehensive income (loss)			0			0			0			(25,523)			(25,523)
Other			$ 0			104			(105)			0			(1)
Ending balance, shares at Dec. 31, 2019			132,371
Balance at end of period at Dec. 31, 2019			$ 132,371			2,791,353			2,895,871			(197,738)			5,621,857
Net earnings			$ 0			0			584,480			0			584,480
Share-based compensation plans, net of shares withheld for taxes, shares			359
Share-based compensation plans, net of shares withheld for taxes			$ 359			(22,442)			0			0			(22,083)
Purchase and retirement of common stock, shares			(214)
Purchase and retirement of common stock			$ (214)			0			(25,918)			0			(26,132)
Share-based compensation expense			0			32,991			0			0			32,991
Cash dividends on common stock			0			0			(180,216)			0			(180,216)
Other comprehensive income (loss)			0			0			0			16,433			16,433
Other			$ 0			110			(110)			0			0
Ending balance, shares at Dec. 31, 2020			132,516
Balance at end of period at Dec. 31, 2020			$ 132,516			$ 2,802,012			$ 3,274,107			$ (181,305)			$ 6,027,330