CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock, par value $1	Additional Paid-In Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Earnings (Loss)	Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU No. 2016-13- CECL		$ (2,112)				$ (2,112)
Balance at beginning of year at Dec. 31, 2019	$ 3,032,660		$ 258,552	$ 869,719	$ 8,211,257		$ (216,026)	$ (6,090,842)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	683,451				683,451
Dividends paid	(284,312)				(284,312)
Common stock issued for the exercise of share-based awards	(28,476)		430	(28,906)
Stock-based compensation expense	25,026			25,026
Common stock acquired	(106,279)							(106,279)
Other comprehensive (loss) earnings, net of tax	62,772						62,772
Other	3,043			3,043	0
Balance at end of year at Dec. 31, 2020	3,385,773		258,982	868,882	8,608,284		(153,254)	(6,197,121)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	1,123,818				1,123,818
Dividends paid	(286,896)				(286,896)
Common stock issued for the exercise of share-based awards	(41,924)		475	(42,399)
Stock-based compensation expense	31,111			31,111
Common stock acquired	(21,637)							(21,637)
Other comprehensive (loss) earnings, net of tax	(798)						(798)
Other	81			42	39
Balance at end of year at Dec. 31, 2021	4,189,528		259,457	857,636	9,445,245		(154,052)	(6,218,758)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU No. 2016-13- CECL	4,189,528						(154,052)
Net earnings	1,065,376				1,065,376
Dividends paid	(287,551)				(287,551)
Common stock issued for the exercise of share-based awards	(14,637)		187	(14,824)
Stock-based compensation expense	30,821			30,821
Common stock acquired	(585,000)			(6,073)				(578,927)
Other comprehensive (loss) earnings, net of tax	(112,171)						(112,171)
Balance at end of year at Dec. 31, 2022	4,286,366		$ 259,644	$ 867,560	$ 10,223,070		(266,223)	$ (6,797,685)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU No. 2016-13- CECL	$ 4,286,366						$ (266,223)