Other Income (Loss), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Other Income (Loss), Net (Details) - USD ($) $ in Millions	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Component of Other Income (Loss), Net [Line Items]
Other income, net	$ 58	$ 14	$ 60	$ 43
Realized and unrealized loss on derivatives, net (Note 6)
Component of Other Income (Loss), Net [Line Items]
Other income, net	(17)	(2)	(5)	(5)
Other derivative loss
Component of Other Income (Loss), Net [Line Items]
Other income, net	0	0	(41)	0
Dividend expense
Component of Other Income (Loss), Net [Line Items]
Other income, net	(9)	(1)	(9)	(4)
Loss on extinguishment of debt (Note 9)
Component of Other Income (Loss), Net [Line Items]
Other income, net	0	0	(4)	(5)
Equity earnings from non-consolidated affiliates
Component of Other Income (Loss), Net [Line Items]
Other income, net	17	12	53	48
Foreign currency transaction loss
Component of Other Income (Loss), Net [Line Items]
Other income, net	0	(2)	(8)	(4)
Tax settlement gain
Component of Other Income (Loss), Net [Line Items]
Other income, net	61	0	61	0
Other
Component of Other Income (Loss), Net [Line Items]
Other income, net	$ 6	$ 7	$ 13	$ 13