Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax	$ (22)	$ (30)	$ 7
Net Unrealized gains (losses) on available-for-sale securities, tax	1	0	0
Net unrealized holding losses arising during period,tax	4	4	1
Cash flow hedges reclassified to earnings, tax	(3)	(3)	0
Pension and post retirement benefits, tax	(1)	25	(19)
Pension and post retirement benefits reclassified to earnings, tax	$ (2)	$ (1)	$ (6)