Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Unrealized loss on cash flow hedge, Balance at beginning of period	$ (4)	$ 0	$ 0	$ 0
Change in value of cash flow hedge, net of tax	(1)	0	(5)	0
Unrealized loss on cash flow hedge, Balance at end of period	(5)	0	(5)	0
Defined benefit plans, net: Balance at beginning of period	(13)	(10)	(13)	(11)
Unrealized gain on subsidiary pension, net of tax	0	0	0	1
Defined benefit plans, net: Balance at end of period	(13)	(10)	(13)	(10)
Foreign currency translation adjustment: Balance at beginning of period	(1,021)	(664)	(1,091)	(422)
Translation (loss) income	(10)	(282)	60	(524)
Foreign currency translation adjustment: Balance at end of period	(1,031)	(946)	(1,031)	(946)
Total accumulated other comprehensive loss	$ (1,049)	$ (956)	$ (1,049)	$ (956)	$ (1,104)