Income Taxes (Schedule of Earnings Before Income Taxes and Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Earnings before income taxes	$ 9,924	$ 9,615	$ 10,650
United States federal and state:
Current	(39)	(56)	(56)
Deferred	293	117	162
Total United States	254	61	106
Outside United States:
Current	2,625	2,762	3,215
Deferred	(111)	(135)	(224)
Total outside United States	2,514	2,627	2,991
Total provision for income taxes	$ 2,768	$ 2,688	$ 3,097