Other Income (Loss), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Other Income (Loss), Net (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Component of Other Income (Loss), Net [Line Items]
Other income (loss), net	$ 17	$ 19	$ 83	$ (11)
Realized and unrealized gain (loss) on derivatives, net (Note 6)
Component of Other Income (Loss), Net [Line Items]
Other income (loss), net	5	(17)	75	(5)
Other derivative loss
Component of Other Income (Loss), Net [Line Items]
Other income (loss), net	0	0	0	(41)
Dividend expense
Component of Other Income (Loss), Net [Line Items]
Other income (loss), net	(1)	(9)	(1)	(9)
Equity earnings from non-consolidated affiliates
Component of Other Income (Loss), Net [Line Items]
Other income (loss), net	3	1	8	2
Foreign currency transaction (loss) gain
Component of Other Income (Loss), Net [Line Items]
Other income (loss), net	(5)	2	0	1
Tax settlement gain
Component of Other Income (Loss), Net [Line Items]
Other income (loss), net	0	38	0	38
Non-service pension and other post-retirement benefits expense
Component of Other Income (Loss), Net [Line Items]
Other income (loss), net	0	(1)	(8)	(3)
Gain on early railcar lease termination
Component of Other Income (Loss), Net [Line Items]
Other income (loss), net	10	0	10	0
Other
Component of Other Income (Loss), Net [Line Items]
Other income (loss), net	$ 5	$ 5	$ (1)	$ 6