Derivative Instruments (Details 1) (USD $) In Millions, unless otherwise specified	Jun. 30, 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	5	8
Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative Assets	2	4
Fair values of derivative instruments on the consolidated balance sheets
Derivative Liabilities	4	8
Not Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative Assets	1
Fair values of derivative instruments on the consolidated balance sheets
Derivative Liabilities	1
Other liabilities [Member] | Designated as Hedging Instrument [Member]
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	1
Commodity contracts [Member] | Accrued expenses [Member] | Designated as Hedging Instrument [Member]
Fair values of derivative instruments on the consolidated balance sheets
Derivative Liabilities	4	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	2	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	$ 1