Derivative Instruments (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Fair values of derivative instruments on the consolidated balance sheets
Derivative Assets	$ 3	$ 4
Fair values of derivative instruments on the consolidated balance sheets
Derivative liabilities	9	8
Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative Assets	3	4
Fair values of derivative instruments on the consolidated balance sheets
Derivative liabilities	9	8
Not Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative Assets
Fair values of derivative instruments on the consolidated balance sheets
Derivative liabilities
Commodity contracts [Member] | Other assets [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative Assets
Commodity contracts [Member] | Other liabilities [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative liabilities
Commodity contracts [Member] | Other Current Assets [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative Assets		1
Commodity contracts [Member] | Other Current Assets [Member] | Not Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative Assets
Commodity contracts [Member] | Accrued Expenses [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative liabilities	9	8
Commodity contracts [Member] | Accrued Expenses [Member] | Not Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative liabilities
Foreign exchange contracts [Member] | Other assets [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative Assets
Foreign exchange contracts [Member] | Other liabilities [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative liabilities
Foreign exchange contracts [Member] | Other Current Assets [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative Assets	3	3
Foreign exchange contracts [Member] | Other Current Assets [Member] | Not Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative Assets
Foreign exchange contracts [Member] | Accrued Expenses [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative liabilities
Foreign exchange contracts [Member] | Accrued Expenses [Member] | Not Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative liabilities