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, 2017	$ 1,828	$ 55	$ 1,041	$ 7,405	$ (135)	$ (6,676)	$ 138
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation	68		24			44
Purchase of treasury stock	(160)					(160)
Net earnings	241			232			9
Other comprehensive (losses) earnings	21				12		9
Cash dividends paid	(73)			(73)
Ending balance at Mar. 31, 2018	1,925	55	1,065	7,564	(123)	(6,792)	156
Beginning balance at Dec. 31, 2017	1,828	55	1,041	7,405	(135)	(6,676)	138
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	489
Other comprehensive (losses) earnings	(31)
Ending balance at Jun. 30, 2018	2,050	55	1,079	7,725	(168)	(6,797)	156
Beginning balance at Mar. 31, 2018	1,925	55	1,065	7,564	(123)	(6,792)	156
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation	37		14			23
Purchase of treasury stock	(28)					(28)
Net earnings	248			237			11
Other comprehensive (losses) earnings	(52)				(45)		(7)
Capital contribution	2						2
Cash dividends paid	(82)			(76)			(6)
Ending balance at Jun. 30, 2018	2,050	55	1,079	7,725	(168)	(6,797)	156
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
Purchase 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
Purchase 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