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]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Retained Earnings [Member]
Balance (shares) at Dec. 31, 2019		557
Balance at Dec. 31, 2019	$ 19,225	$ 2,655	$ 18,958	$ (2,405)	$ 17		$ (8)	$ 19,217	$ 18,950
Balance (Accounting Standards Update 2019-05) at Dec. 31, 2019						$ (8)	$ (8)
Comprehensive income
Net earnings including noncontrolling interests	391		391		0
Other comprehensive income (loss)	(355)			(359)	4
Total comprehensive income	$ 36
Common Stock, Dividends, Per Share, Cash Paid	$ 0.36
Cash dividends paid	$ (203)		(203)
Stock Repurchased During Period, Value	$ (112)		(112)
Stock Repurchased During Period, Shares		(3)
Stock compensation expense, shares	1
Stock compensation expense	$ 51	$ 51
Other, shares		0
Other	(13)	$ (16)	0	0	3
Balance (shares) at Mar. 31, 2020		555
Balance at Mar. 31, 2020	18,976	$ 2,690	19,026	(2,764)	24
Balance (shares) at Dec. 31, 2020		556
Balance at Dec. 31, 2020	20,022	$ 2,824	19,780	(2,604)	22
Comprehensive income
Net earnings including noncontrolling interests	693		689		4
Other comprehensive income (loss)	326			326	0
Total comprehensive income	$ 1,019
Common Stock, Dividends, Per Share, Cash Paid	$ 0.37
Cash dividends paid	$ (208)		(208)
Stock compensation expense, shares		3
Stock compensation expense	76	$ 76
Other, shares		0
Other	(48)	$ (42)	0		(6)
Balance (shares) at Mar. 31, 2021		559
Balance at Mar. 31, 2021	$ 20,861	$ 2,858	$ 20,261	$ (2,278)	$ 20