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]	Previously Reported [Member]	Previously Reported [Member] Retained Earnings [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] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Accumulated Other Comprehensive Income (Loss) [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Noncontrolling Interests [Member]
Balance (shares) at Dec. 31, 2018		559
Balance at Dec. 31, 2018	$ 18,996	$ 2,560	$ 18,527	$ (2,106)	$ 15
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		0
Other	(15)	$ (9)	(9)	0	3
Balance (shares) at Sep. 30, 2019		557
Balance at Sep. 30, 2019	18,895	$ 2,617	18,651	(2,395)	22
Balance (shares) at Jun. 30, 2019		558
Balance at Jun. 30, 2019	18,979	$ 2,588	18,497	(2,130)	24
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 (shares) at Sep. 30, 2019		557
Balance at Sep. 30, 2019	18,895	$ 2,617	18,651	(2,395)	22
Balance (shares) at Dec. 31, 2019		557
Balance at Dec. 31, 2019	19,225	$ 2,655		(2,405)	17	$ 19,225	$ 18,958	$ (8)	$ (8)	$ 19,217	$ 2,655	$ 18,950	$ (2,405)	$ 17
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		(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