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	1,089		1,085		4
Other comprehensive income (loss)	(339)			(344)	5
Total comprehensive income	$ 750
Common Stock, Dividends, Per Share, Cash Paid	$ 1.08
Cash dividends paid	$ (607)		(607)
Stock Repurchased During Period, Value	$ (117)		(117)
Stock Repurchased During Period, Shares		(3)
Stock compensation expense, shares	2
Stock compensation expense	$ 114	$ 114
Other, shares		0
Other	(16)	$ (9)	0	0	(7)
Balance (shares) at Sep. 30, 2020		556
Balance at Sep. 30, 2020	19,341	$ 2,760	19,311	(2,749)	19
Balance (shares) at Jun. 30, 2020		556
Balance at Jun. 30, 2020	19,311	$ 2,705	19,293	(2,705)	18
Comprehensive income
Net earnings including noncontrolling interests	226		225		1
Other comprehensive income (loss)	(43)			(44)	1
Total comprehensive income	$ 183
Common Stock, Dividends, Per Share, Cash Paid	$ 0.36
Cash dividends paid	$ (202)		(202)
Stock Repurchased During Period, Value	$ (5)		(5)
Stock Repurchased During Period, Shares		0
Stock compensation expense, shares	0
Stock compensation expense	$ 39	$ 39
Other, shares		0
Other	15	$ 16	0	0	(1)
Balance (shares) at Sep. 30, 2020		556
Balance at Sep. 30, 2020	19,341	$ 2,760	19,311	(2,749)	19
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	1,938		1,927		11
Other comprehensive income (loss)	527			528	(1)
Total comprehensive income	$ 2,465
Common Stock, Dividends, Per Share, Cash Paid	$ 1.11
Cash dividends paid	$ (626)		(626)
Stock compensation expense, shares		3
Stock compensation expense	135	$ 135
Other, shares		0
Other	(6)	$ 5	0		(11)
Balance (shares) at Sep. 30, 2021		559
Balance at Sep. 30, 2021	21,990	$ 2,964	21,081	(2,076)	21
Balance (shares) at Jun. 30, 2021		559
Balance at Jun. 30, 2021	21,603	$ 2,941	20,762	(2,121)	21
Comprehensive income
Net earnings including noncontrolling interests	533		526		7
Other comprehensive income (loss)	44			45	(1)
Total comprehensive income	$ 577
Common Stock, Dividends, Per Share, Cash Paid	$ 0.37
Cash dividends paid	$ (209)		(209)
Stock compensation expense, shares	0
Stock compensation expense	$ 21	$ 21
Other, shares		0
Other	(2)	$ 2	2	0	(6)
Balance (shares) at Sep. 30, 2021		559
Balance at Sep. 30, 2021	$ 21,990	$ 2,964	$ 21,081	$ (2,076)	$ 21