Derivative Instruments - Balance Sheet Classification (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Derivatives, Fair Value
Total asset derivatives	$ 15	$ 14	$ 21
Total liability derivatives	6	5	2
Derivatives not designated as hedging instruments | Forward exchange contracts | Receivables.
Derivatives, Fair Value
Total asset derivatives	15	14	21
Derivatives not designated as hedging instruments | Forward exchange contracts | Other accrued liabilities or other liabilities (current)
Derivatives, Fair Value
Total liability derivatives	2	2	$ 2
Derivatives designated as hedging instruments | Commodity forward contracts | Other accrued liabilities or other liabilities (current)
Derivatives, Fair Value
Total liability derivatives	$ 4	$ 3