Consolidated Statements Of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]
Balance at Dec. 31, 2017	$ 18,322	$ 2,398	$ 17,552	$ (1,637)	$ 9
Balance (shares) at Dec. 31, 2017		557
Comprehensive income
Net earnings including noncontrolling interests	396		393		3
Other comprehensive income (loss)	186			186	0
Total comprehensive income	582
Cash dividends paid	$ (190)		(190)
Stock compensation expense, shares	2
Stock compensation expense	$ 29	$ 29
Other, shares		0
Other	(6)	$ 1	0	0	(7)
Balance at Mar. 31, 2018	18,737	$ 2,428	17,755	(1,451)	5
Balance (shares) at Mar. 31, 2018		559
Balance at Dec. 31, 2018	18,996	$ 2,560	18,527	(2,106)	15
Balance (shares) at Dec. 31, 2018		559
Comprehensive income
Net earnings including noncontrolling interests	234		233		1
Other comprehensive income (loss)	(136)			(136)	0
Total comprehensive income	98
Cash dividends paid	(198)		(198)
Stock compensation expense, shares		1
Stock compensation expense	43	$ 43
Other, shares		0
Other	(29)	$ (19)	(9)	0	(1)
Balance at Mar. 31, 2019	$ 18,910	$ 2,584	$ 18,553	$ (2,242)	$ 15
Balance (shares) at Mar. 31, 2019		560