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	1,498		1,495		3
Other comprehensive income (loss)	(395)			(395)	0
Total comprehensive income	$ 1,103
Common Stock, Dividends, Per Share, Cash Paid	$ 1.005
Cash dividends paid	$ (568)		(568)
Stock compensation expense, shares	1
Stock compensation expense	$ 88	$ 88
Other, shares		2
Other	55	$ 55	(1)	0	1
Balance at Sep. 30, 2018	19,000	$ 2,541	18,478	(2,032)	13
Balance (shares) at Sep. 30, 2018		560
Balance at Jun. 30, 2018	18,712	$ 2,489	18,132	(1,911)	2
Balance (shares) at Jun. 30, 2018		559
Comprehensive income
Net earnings including noncontrolling interests	536		536		0
Other comprehensive income (loss)	(121)			(121)	0
Total comprehensive income	$ 415
Common Stock, Dividends, Per Share, Cash Paid	$ 0.335
Cash dividends paid	$ (189)		(189)
Stock compensation expense, shares	0
Stock compensation expense	$ 25	$ 25
Other, shares		1
Other	37	$ 27	(1)	0	11
Balance at Sep. 30, 2018	19,000	$ 2,541	18,478	(2,032)	13
Balance (shares) at Sep. 30, 2018		560
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	880		875		5
Other comprehensive income (loss)	(290)			(289)	(1)
Total comprehensive income	$ 590
Common Stock, Dividends, Per Share, Cash Paid	$ 1.05
Cash dividends paid	$ (592)		(592)
Stock Repurchased During Period, Value	(150)		(150)
Stock Repurchased During Period, Shares		(4)
Stock compensation expense, shares		2
Stock compensation expense	66	$ 66
Other, shares
Other	(15)	$ (9)	(9)		3
Balance at Sep. 30, 2019	18,895	$ 2,617	18,651	(2,395)	22
Balance (shares) at Sep. 30, 2019		557
Balance at Jun. 30, 2019	18,979	$ 2,588	18,497	(2,130)	24
Balance (shares) at Jun. 30, 2019		558
Comprehensive income
Net earnings including noncontrolling interests	408		407		1
Other comprehensive income (loss)	(266)			(265)	(1)
Total comprehensive income	$ 142
Common Stock, Dividends, Per Share, Cash Paid	$ 0.35
Cash dividends paid	$ (197)		(197)
Stock Repurchased During Period, Value	$ (56)		(56)
Stock Repurchased During Period, Shares		(2)
Stock compensation expense, shares	1
Stock compensation expense	$ 21	$ 21
Other, shares		0
Other	6	$ 8	0	0	(2)
Balance at Sep. 30, 2019	$ 18,895	$ 2,617	$ 18,651	$ (2,395)	$ 22
Balance (shares) at Sep. 30, 2019		557