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 of New Accounting Principle in Period of Adoption | Restatement Adjustment [Member]		$ (53)	$ 53
Balance (Scenario, Previously Reported [Member]) at Dec. 31, 2015	$ 17,915	3,180	16,865	$ (2,146)	$ 16
Balance at Dec. 31, 2015	17,915	$ 3,127	16,918	(2,146)	16
Balance (shares) (Scenario, Previously Reported [Member]) at Dec. 31, 2015		595
Balance (shares) at Dec. 31, 2015		595
Comprehensive income
Net earnings	518		514		4
Other comprehensive income (loss)	8			8	0
Total comprehensive income	526
Cash dividends paid - $0.60 per share	(353)		(353)
Treasury stock purchases, shares		(13)
Treasury stock purchases	$ (487)	$ (487)
Stock compensation expense, shares	1
Stock compensation expense	$ 45	$ 45
Other, shares		0
Other	23	$ 29	0	0	(6)
Balance at Jun. 30, 2016	$ 17,669	$ 2,714	$ 17,079	$ (2,138)	$ 14
Balance (shares) at Jun. 30, 2016		583