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Accrued Expenses and Other Long-Term Liabilities (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2012 Aruba Refinery [Member] employees | Dec. 31, 2012 Aruba Refinery [Member]
Accrued Expenses |  |  |  |
Defined benefit plan liabilities, current | $ 32 | $ 37 |  |
Wage and other employee-related liabilities, current | 282 | 259 |  |
Uncertain income tax position liabilities, current | 0 | 0 |  |
Environmental liabilities, current | 27 | 39 |  |
Accrued interest expense, current | 96 | 108 |  |
Derivative liabilities, current | 14 | 25 |  |
Asset retirement obligations, current | 5 | 6 |  |
Other accrued liabilities, current | 134 | 121 |  |
Accrued expenses | 590 | 595 |  |
Other Long-Term Liabilities |  |  |  |
Defined benefit plan liabilities, noncurrent | 982 | 795 |  |
Wage and other employee-related liabilities, noncurrent | 91 | 79 |  |
Uncertain income tax position liabilities, noncurrent | 391 | 337 |  |
Environmental liabilities, noncurrent | 242 | 235 |  |
Derivative liabilities, noncurrent | 0 | 0 |  |
Asset retirement obligations, noncurrent | 103 | 81 |  |
Other accrued liabilities, noncurrent | 321 | 354 |  |
Other long-term liabilities | 2,130 | 1,881 |  |
One-Time Severance Benefits (Textual) |  |  |  |
Number of employees notified of termination |  |  | 495 |
Termination date |  |  | Nov. 15, 2012 |
Severance liability |  |  | 41 | 10
Severance payments | (31) |  |  |
Severance costs |  |  |  | $ 41

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