Derivative Instruments - Balance Sheet Classification (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Derivatives, Fair Value
Total asset derivatives	$ 9	$ 14	$ 8
Total liability derivatives	3	5	5
Derivatives not designated as hedging instruments | Forward exchange contracts | Receivables.
Derivatives, Fair Value
Total asset derivatives	6	14	8
Derivatives not designated as hedging instruments | Forward exchange contracts | Other accrued liabilities or other liabilities (current)
Derivatives, Fair Value
Total liability derivatives	3	2	$ 5
Derivatives designated as hedging instruments | Commodity forward contracts | Receivables.
Derivatives, Fair Value
Total asset derivatives	$ 3
Derivatives designated as hedging instruments | Commodity forward contracts | Other accrued liabilities or other liabilities (current)
Derivatives, Fair Value
Total liability derivatives		$ 3