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Accrued Expenses and Other Long-Term Liabilities (Details) (USD $) In Millions, unless otherwise specified |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 Aruba Refinery [Member] employees | Mar. 31, 2013 Aruba Refinery [Member] | Dec. 31, 2012 Aruba Refinery [Member] | Dec. 31, 2012 Aruba Refinery [Member] | Dec. 31, 2013 Income Taxes Payable [Member]
Accrued Expenses |  |  |  |  |  |  |  |  |
Defined benefit plan liabilities, current | $ 30 |  | $ 32 |  |  |  |  |  |
Wage and other employee-related liabilities, current | 257 |  | 282 |  |  |  |  |  |
Environmental liabilities, current | 24 |  | 27 |  |  |  |  |  |
Accrued interest expense, current | 90 |  | 96 |  |  |  |  |  |
Derivative liabilities, current | 13 |  | 14 |  |  |  |  |  |
Asset retirement obligations, current | 5 |  | 5 |  |  |  |  |  |
Other accrued liabilities, current | 103 |  | 134 |  |  |  |  |  |
Accrued expenses | 522 |  | 590 |  |  |  |  |  |
Other Long-Term Liabilities |  |  |  |  |  |  |  |  |
Defined benefit plan liabilities, noncurrent | 507 |  | 982 |  |  |  |  |  |
Wage and other employee-related liabilities, noncurrent | 97 |  | 91 |  |  |  |  |  |
Uncertain income tax position liabilities, including related penalties and interest | 205 | [1] | 391 | [1] |  |  |  |  |
Environmental liabilities, noncurrent | 277 |  | 242 |  |  |  |  |  |
Derivative liabilities, noncurrent | 0 |  | 0 |  |  |  |  |  |
Asset retirement obligations, noncurrent | 26 |  | 103 |  |  |  |  |  |
Other accrued liabilities, noncurrent | 217 |  | 321 |  |  |  |  |  |
Other long-term liabilities | 1,329 |  | 2,130 |  |  |  |  |  |
Uncertain tax position liabilities | 443 |  | 391 |  |  |  |  |  |
Uncertain tax position liabilities, current |  |  |  |  |  |  |  |  | 238
One-Time Severance Benefits (Textual) |  |  |  |  |  |  |  |  |
Number of employees notified of termination |  |  |  |  | 495 |  |  |  |
Termination date |  |  |  |  | Nov. 15, 2012 |  |  |  |
Severance liability |  |  |  |  | 41 |  |  |  |
Severance payments |  |  |  |  |  | 10 | 31 |  |
Severance costs |  |  |  |  |  |  |  | $ 41 |
[1] | As of December 31, 2013, our total liability for uncertain tax positions, including related penalties and interest, was $443 million, with $238 million classified as a current liability and reflected in “Income taxes payable” and the remaining $205 million classified as a long-term liability and reflected in “Other long-term liabilities” as detailed in this table. As of December 31, 2012, our total liability for uncertain tax positions, including related penalties and interest, was classified as a long-term liability and reflected in “Other long-term liabilities” as detailed in this table.

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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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