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Accrued Liabilities (Tables) | 3 Months Ended
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Mar. 31, 2013
Payables And Accruals [Abstract] |
Accrued Liabilities | Accrued liabilities consist of (in millions):
|  | March 31, |  |  | December 31, |
|  | 2013 |  |  | 2012 |
Customer prepayments and billings |  | $ | 687 |  |  | $ | 699 |
Accrued vendor costs |  |  | 493 |  |  |  | 444 |
Compensation |  |  | 321 |  |  |  | 511 |
Warranty |  |  | 188 |  |  |  | 194 |
Insurance |  |  | 108 |  |  |  | 108 |
Taxes (non income) |  |  | 105 |  |  |  | 150 |
Fair value of derivatives |  |  | 47 |  |  |  | 18 |
Interest |  |  | 35 |  |  |  | 14 |
Other |  |  | 484 |  |  |  | 433 |
Total |  | $ | 2,468 |  |  | $ | 2,571 |
Changes in Carrying Amount of Service and Product Warranties | The changes in the carrying amount of service and product warranties are as follows (in millions):
Balance at December 31, 2012 |  | $ | 194 |
Net provisions for warranties issued during the year |  |  | 18 |
Amounts incurred |  |  | (23 | )
Currency translation adjustments and other |  |  | (1 | )
Balance at March 31, 2013 |  | $ | 188 |

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