Derivative Instruments - Balance Sheet Classification (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Derivatives, Fair Value
Total asset derivatives	$ 2	$ 15	$ 9
Total liability derivatives	7	5	3
Derivatives not designated as hedging instruments | Foreign exchange contracts | Other assets.
Derivatives, Fair Value
Total asset derivatives	2	9	6
Derivatives not designated as hedging instruments | Forward exchange contracts | Other liabilities (current)
Derivatives, Fair Value
Total liability derivatives	3	5	3
Derivatives designated as hedging instruments | Commodity futures contracts | Other assets.
Derivatives, Fair Value
Total asset derivatives		$ 6	$ 3
Derivatives designated as hedging instruments | Commodity futures contracts | Other liabilities (current)
Derivatives, Fair Value
Total liability derivatives	1
Derivatives designated as hedging instruments | Cross-currency interest rate swap | Other liabilities (current)
Derivatives, Fair Value
Total liability derivatives	$ 3