Financial Instrument Derivative Fair Value (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Foreign Currency Exchange Contracts [Member] | Accounts Notes And Other Receivables [Member] | Designated as Hedging Instrument [Member]
Derivative, Fair Value [Line Items]
Derivative Asset, Fair Value, Net	$ 15	$ 10
Foreign Currency Exchange Contracts [Member] | Accounts Notes And Other Receivables [Member] | Not Designated as Hedging Instrument [Member]
Derivative, Fair Value [Line Items]
Derivative Asset, Fair Value, Net	1	6
Foreign Currency Exchange Contracts [Member] | Accrued Liability [Member] | Designated as Hedging Instrument [Member]
Derivative, Fair Value [Line Items]
Derivative Liability, Fair Value, Net	36	9
Foreign Currency Exchange Contracts [Member] | Accrued Liability [Member] | Not Designated as Hedging Instrument [Member]
Derivative, Fair Value [Line Items]
Derivative Liability, Fair Value, Net	4	5
Interest Rate Swap Agreements [Member] | Other Assets [Member] | Designated as Hedging Instrument [Member]
Derivative, Fair Value [Line Items]
Derivative Asset, Fair Value, Net	135	22
Commodity Contracts [Member] | Accounts Notes And Other Receivables [Member] | Designated as Hedging Instrument [Member]
Derivative, Fair Value [Line Items]
Derivative Asset, Fair Value, Net	1	2
Commodity Contracts [Member] | Accrued Liability [Member] | Designated as Hedging Instrument [Member]
Derivative, Fair Value [Line Items]
Derivative Liability, Fair Value, Net	$ 3	$ 2