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	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		0
Other	(21)	$ (17)	(9)	0	5
Balance (shares) at Jun. 30, 2019		558
Balance at Jun. 30, 2019	18,979	$ 2,588	18,497	(2,130)	24
Balance (shares) at Mar. 31, 2019		560
Balance at Mar. 31, 2019	18,910	$ 2,584	18,553	(2,242)	15
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 (shares) at Jun. 30, 2019		558
Balance at Jun. 30, 2019	18,979	$ 2,588	18,497	(2,130)	24
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	863		860		3
Other comprehensive income (loss)	(296)			(300)	4
Total comprehensive income	$ 567
Common Stock, Dividends, Per Share, Cash Paid	$ 0.72
Cash dividends paid	$ (405)		(405)
Stock Repurchased During Period, Value	(112)		(112)
Stock Repurchased During Period, Shares		(3)
Stock compensation expense, shares		2
Stock compensation expense	75	$ 75
Other, shares
Other	(31)	$ (25)	0		(6)
Balance (shares) at Jun. 30, 2020		556
Balance at Jun. 30, 2020	19,311	$ 2,705	19,293	(2,705)	18
Balance (shares) at Mar. 31, 2020		555
Balance at Mar. 31, 2020	18,976	$ 2,690	19,026	(2,764)	24
Comprehensive income
Net earnings including noncontrolling interests	472		469		3
Other comprehensive income (loss)	59			59	0
Total comprehensive income	$ 531
Common Stock, Dividends, Per Share, Cash Paid	$ 0.36
Cash dividends paid	$ (202)		(202)
Stock Repurchased During Period, Value	$ 0		0
Stock Repurchased During Period, Shares		0
Stock compensation expense, shares	1
Stock compensation expense	$ 24	$ 24
Other, shares		0
Other	(18)	$ (9)	0	0	(9)
Balance (shares) at Jun. 30, 2020		556
Balance at Jun. 30, 2020	$ 19,311	$ 2,705	$ 19,293	$ (2,705)	$ 18