Derivative Instruments (Details 2) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Derivatives, Fair Value
Total asset derivatives	$ 10	$ 4	$ 4
Total liability derivatives	6	7	13
Derivatives designated as hedging instruments | Commodity futures contracts | Receivables
Derivatives, Fair Value
Total asset derivatives		1
Derivatives designated as hedging instruments | Commodity futures contracts | Other liabilities (current)
Derivatives, Fair Value
Total liability derivatives			1
Derivatives not designated as hedging instruments | Forward exchange contracts | Receivables
Derivatives, Fair Value
Total asset derivatives	10	3	4
Derivatives not designated as hedging instruments | Forward exchange contracts | Other liabilities (current)
Derivatives, Fair Value
Total liability derivatives	$ 6	$ 7	$ 12