Changes in Accumulated Other Comprehensive Income (Loss) (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Comprehensive Income (Loss), Tax [Abstract]
Foreign currency translation adjustment	$ 49	$ 0	$ 30
Net investment hedges	48	140	96
Total tax impact	$ 97	$ 140	$ 126