Derivative Instruments (Details 3) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Derivatives, Fair Value
Total asset derivatives	$ 5	$ 8	$ 26
Total liability derivatives	11	24	9
Commodity futures contracts | Derivatives designated as hedging instruments | Other liabilities (current)
Derivatives, Fair Value
Total liability derivatives	2	3	3
Derivatives not designated as hedging instruments
Derivatives, Fair Value
Total asset derivatives	5	8	26
Derivatives not designated as hedging instruments | Foreign exchange contracts | Receivables
Derivatives, Fair Value
Total asset derivatives	4	5	24
Derivatives not designated as hedging instruments | Foreign exchange contracts | Deposits, receivables, and other assets
Derivatives, Fair Value
Total asset derivatives		2	2
Derivatives not designated as hedging instruments | Foreign exchange contracts | Other liabilities (current)
Derivatives, Fair Value
Total asset derivatives	1	1
Total liability derivatives	$ 9	$ 21	$ 6