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 |