Consolidated Statements Of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjusted Balance	Previously Reported	Common Stock [Member]	Reinvested Earnings [Member]	Reinvested Earnings [Member] Cumulative Effect, Period of Adoption, Adjusted Balance	Reinvested Earnings [Member] Previously Reported	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [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	1,815				1,810				5
Other comprehensive income (loss)	(469)							(469)
Total comprehensive income	$ 1,346
Common Stock, Dividends, Per Share, Cash Paid	$ 1.34
Cash dividends paid	$ (758)				(758)
Treasury stock purchases, shares				(2)
Treasury stock purchases	(77)				(77)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture				2
Stock compensation expense	109			$ 109
Other	54			$ 53					1
Other, shares				2
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	1,379				1,379
Other comprehensive income (loss)	(297)							(299)	2
Total comprehensive income	$ 1,082
Common Stock, Dividends, Per Share, Cash Paid	$ 1.40
Cash dividends paid	$ (789)				(789)
Stock Repurchased During Period, Shares				(4)
Stock Repurchased During Period, Value	(150)				(150)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture				2
Stock compensation expense	89			$ 89
Other	(3)			$ 6	(9)
Other, shares
Balance at Dec. 31, 2019	19,225	$ 19,217	$ 19,225	$ 2,655		$ 18,950	$ 18,958	(2,405)	17
Balance (Accounting Standards Update 2019-05) at Dec. 31, 2019	(8)				(8)
Balance, shares at Dec. 31, 2019				557
Comprehensive income
Net earnings	1,782				1,772				10
Other comprehensive income (loss)	(192)							(199)	7
Total comprehensive income	$ 1,590
Common Stock, Dividends, Per Share, Cash Paid	$ 1.44
Cash dividends paid	$ (809)				(809)
Stock Repurchased During Period, Shares				(4)
Stock Repurchased During Period, Value	(133)				(133)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture				2
Stock compensation expense	151			$ 151
Other	6			$ 18					(12)
Other, shares				1
Balance at Dec. 31, 2020	$ 20,022			$ 2,824	$ 19,780			$ (2,604)	$ 22
Balance, shares at Dec. 31, 2020				556