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Accrued Liabilities (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
--- | --- | --- | ---
Accrued Liabilities |  |  |
Customer prepayments and billings | $ 686 | $ 387 |
Compensation | 468 | 403 |
Accrued vendor costs | 280 | 597 |
Warranty | 211 | 215 | 217
Taxes (non income) | 119 | 93 |
Insurance | 103 | 49 |
Fair value of derivatives | 83 | 22 |
Interest | 7 | 11 |
Other | 419 | 328 |
Total | $ 2,376 | $ 2,105 |

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