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	962		959		3
Other comprehensive income (loss)	(274)			(274)	0
Total comprehensive income	$ 688
Common Stock, Dividends, Per Share, Cash Paid	$ 0.67
Cash dividends paid	$ (379)		(379)
Stock compensation expense, shares	1
Stock compensation expense	$ 63	$ 63
Other, shares		1
Other	18	$ 28	0	0	(10)
Balance at Jun. 30, 2018	18,712	$ 2,489	18,132	(1,911)	2
Balance (shares) at Jun. 30, 2018		559
Balance at Mar. 31, 2018	18,737	$ 2,428	17,755	(1,451)	5
Balance (shares) at Mar. 31, 2018		559
Comprehensive income
Net earnings including noncontrolling interests	566		566		0
Other comprehensive income (loss)	(460)			(460)	0
Total comprehensive income	$ 106
Common Stock, Dividends, Per Share, Cash Paid	$ 0.335
Cash dividends paid	$ (189)		(189)
Stock compensation expense, shares	0
Stock compensation expense	$ 34	$ 34
Other, shares		0
Other	24	$ 27	0	0	(3)
Balance at Jun. 30, 2018	18,712	$ 2,489	18,132	(1,911)	2
Balance (shares) at Jun. 30, 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	472		468		4
Other comprehensive income (loss)	(24)			(24)	0
Total comprehensive income	$ 448
Common Stock, Dividends, Per Share, Cash Paid	$ 0.70
Cash dividends paid	$ (395)		(395)
Stock Repurchased During Period, Value	(94)		(94)
Stock Repurchased During Period, Shares		(2)
Stock compensation expense, shares		1
Stock compensation expense	45	$ 45
Other, shares
Other	(21)	$ (17)	(9)	0	5
Balance at Jun. 30, 2019	18,979	$ 2,588	18,497	(2,130)	24
Balance (shares) at Jun. 30, 2019		558
Balance at Mar. 31, 2019	18,910	$ 2,584	18,553	(2,242)	15
Balance (shares) at Mar. 31, 2019		560
Comprehensive income
Net earnings including noncontrolling interests	238		235		3
Other comprehensive income (loss)	112			112	0
Total comprehensive income	$ 350
Common Stock, Dividends, Per Share, Cash Paid	$ 0.35
Cash dividends paid	$ (197)		(197)
Stock Repurchased During Period, Value	$ (94)		(94)
Stock Repurchased During Period, Shares		(2)
Stock compensation expense, shares	0
Stock compensation expense	$ 2	$ 2
Other, shares		0
Other	8	$ 2	0	0	6
Balance at Jun. 30, 2019	$ 18,979	$ 2,588	$ 18,497	$ (2,130)	$ 24
Balance (shares) at Jun. 30, 2019		558