CONDENSED CONSOLIDATED STATEMENT OF SHAREDHOLDERS' EQUITY CONDENSED CONSOLIDATED STATEMENT OF SHAREDHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Contributed Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Earnings (Losses)	Treasury Stock [Member]	Noncontrolling Interest [Member]
Beginning balance at Dec. 31, 2018	$ 2,093	$ 55	$ 1,134	$ 7,869	$ (171)	$ (6,966)	$ 172
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation	6		3			3
Purchases of treasury stock	(135)					(135)
Net earnings	262			253			9
Other comprehensive (losses) earnings	1				3		(2)
Capital contribution	2						2
Cash dividends paid	(77)			(77)
Ending balance at Mar. 31, 2019	2,152	55	1,137	8,045	(168)	(7,098)	181
Beginning balance at Dec. 31, 2018	2,093	55	1,134	7,869	(171)	(6,966)	172
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	534
Other comprehensive (losses) earnings	18
Ending balance at Jun. 30, 2019	2,114	55	1,152	8,226	(156)	(7,354)	191
Beginning balance at Mar. 31, 2019	2,152	55	1,137	8,045	(168)	(7,098)	181
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation	24		15			9
Purchases of treasury stock	(265)					(265)
Net earnings	272			260			12
Other comprehensive (losses) earnings	17				12		5
Cash dividends paid	(86)			(79)			(7)
Ending balance at Jun. 30, 2019	2,114	55	1,152	8,226	(156)	(7,354)	191
Beginning balance at Dec. 31, 2019	2,060	55	1,182	8,405	(154)	(7,633)	205
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation	23		10			13
Purchases of treasury stock	(100)					(100)
Net earnings	185			173			12
Other comprehensive (losses) earnings	(60)				(63)		3
Cash dividends paid	(78)			(78)
Ending balance at Mar. 31, 2020	2,030	55	1,192	8,500	(217)	(7,720)	220
Beginning balance at Dec. 31, 2019	2,060	55	1,182	8,405	(154)	(7,633)	205
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	314
Other comprehensive (losses) earnings	4
Ending balance at Jun. 30, 2020	2,152	55	1,198	8,536	(151)	(7,709)	223
Beginning balance at Mar. 31, 2020	2,030	55	1,192	8,500	(217)	(7,720)	220
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation	17		6			11
Purchases of treasury stock	(1)						(1)
Net earnings	129			114			15
Other comprehensive (losses) earnings	64				66		(2)
Cash dividends paid	(87)			(78)			(9)
Ending balance at Jun. 30, 2020	$ 2,152	$ 55	$ 1,198	$ 8,536	$ (151)	$ (7,709)	$ 223