Consolidated Statements Of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Adjustments for New Accounting Principle, Early Adoption [Member]	Common Stock [Member]	Retained Earnings [Member]	Retained Earnings [Member] Adjustments for New Accounting Principle, Early Adoption [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ (7)	$ (7)			$ (7)
Adjusted Balance	17,174		$ 2,327	$ 17,437		$ (2,598)	$ 8
Balance (Scenario, Previously Reported [Member]) at Dec. 31, 2016	17,181		$ 2,327	17,444		(2,598)	8
Balance at Dec. 31, 2016	17,181
Balance (shares) (Scenario, Previously Reported [Member]) at Dec. 31, 2016			573
Balance (shares) at Dec. 31, 2016			573
Comprehensive income
Net earnings	810			807			3
Other comprehensive income (loss)	757					755	2
Total comprehensive income	1,567
Cash dividends paid - $0.96 per share	(544)			(544)
Stock Repurchased During Period, Value	$ (676)			(676)
Stock Repurchased During Period, Shares			(16)
Stock compensation expense, shares	1
Stock compensation expense	$ 63		$ 63
Other, shares			1
Other	(7)		$ 0	(1)		0	(6)
Balance at Sep. 30, 2017	$ 17,577		$ 2,390	$ 17,023		$ (1,843)	$ 7
Balance (shares) at Sep. 30, 2017			559