Consolidated Statements Of Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Stockholders' Equity [Abstract]
Other Comprehensive Income (loss), Tax	$ 425	$ (686)	$ 2,199
Cash dividends declared, per share	$ 4.69	$ 3.82	$ 3.10