Derivative Instruments (Details 1) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Fair values of derivative instruments on the condensed consolidated balance sheets
Derivative Assets	$ 7	$ 1
Derivative liabilities	11	25
Commodity contracts [Member] | Other assets [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the condensed consolidated balance sheets
Derivative Assets	0	0
Commodity contracts [Member] | Other liabilities [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the condensed consolidated balance sheets
Derivative liabilities	1	5
Commodity contracts [Member] | Other current assets [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the condensed consolidated balance sheets
Derivative Assets	1	0
Commodity contracts [Member] | Other current assets [Member] | Not Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the condensed consolidated balance sheets
Derivative Assets	1	1
Commodity contracts [Member] | Accrued expenses [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the condensed consolidated balance sheets
Derivative liabilities	10	16
Commodity contracts [Member] | Accrued expenses [Member] | Not Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the condensed consolidated balance sheets
Derivative liabilities	0	0
Foreign exchange contracts [Member] | Other assets [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the condensed consolidated balance sheets
Derivative Assets	1	0
Foreign exchange contracts [Member] | Other liabilities [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the condensed consolidated balance sheets
Derivative liabilities	0	1
Foreign exchange contracts [Member] | Other current assets [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the condensed consolidated balance sheets
Derivative Assets	4	0
Foreign exchange contracts [Member] | Accrued expenses [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the condensed consolidated balance sheets
Derivative liabilities	0	3
Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the condensed consolidated balance sheets
Derivative Assets	6	0
Derivative liabilities	11	25
Not Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the condensed consolidated balance sheets
Derivative Assets	1	1
Derivative liabilities	$ 0	$ 0