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Income Taxes (Details) (USD $) | 12 Months Ended |  | 12 Months Ended | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 Foreign Tax Authority [Member] | Dec. 31, 2012 State and Local Jurisdiction [Member] | Dec. 31, 2012 State and Local Jurisdiction [Member] U S State Income Tax Credits Limited [Member] | Dec. 31, 2012 State and Local Jurisdiction [Member] U S State Income Tax Credits Unlimited [Member] | Dec. 31, 2012 Consolidated Statement Of Income [Member] | Dec. 31, 2012 Additional Paid-in Capital [Member] | Dec. 31, 2012 Minimum [Member] State and Local Jurisdiction [Member] | Dec. 31, 2012 Minimum [Member] State and Local Jurisdiction [Member] U S State Income Tax Credits Limited [Member] | Dec. 31, 2012 Maximum [Member] State and Local Jurisdiction [Member] | Dec. 31, 2012 Maximum [Member] State and Local Jurisdiction [Member] U S State Income Tax Credits Limited [Member] | Sep. 30, 2012 Aruba Refinery [Member] | Mar. 31, 2012 Aruba Refinery [Member] | Dec. 31, 2012 Aruba Refinery [Member]
Income (Loss) from Continuing Operations Before Income Tax Expense (Benefit) from Domestic and Foreign Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. operations | $ 4,015,000,000 | $ 3,190,000,000 | $ 1,436,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
International operations | (309,000,000) | 132,000,000 | 62,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations before income tax expense | 3,706,000,000 | 3,322,000,000 | 1,498,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Reconciliation of Income Tax Expense (Benefit) Related to Income (Loss) from Continuing Operations Before Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal income tax expense at the U.S. statutory rate | 1,297,000,000 | 1,163,000,000 | 524,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. state income tax expense (benefit), net of U.S. federal income tax effect | 64,000,000 | 29,000,000 | (21,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. manufacturing deduction | (33,000,000) | (28,000,000) | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
International operations | 266,000,000 | 46,000,000 | 27,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Permanent differences | 20,000,000 | 8,000,000 | 8,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Change in tax law | 0 | 0 | 16,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Other, net | 12,000,000 | 8,000,000 | 16,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax expense | 1,626,000,000 | 1,226,000,000 | 575,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Current: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. federal | 515,000,000 | 562,000,000 | (75,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. state | 22,000,000 | 13,000,000 | (13,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |
International | 126,000,000 | 186,000,000 | 22,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Total current | 663,000,000 | 761,000,000 | (66,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. federal | 854,000,000 | 527,000,000 | 634,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. state | 77,000,000 | 32,000,000 | (19,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |
International | 32,000,000 | (94,000,000) | 26,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Total deferred | 963,000,000 | 465,000,000 | 641,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax expense | 1,626,000,000 | 1,226,000,000 | 575,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Credit and Loss Carryforwards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax credits |  |  |  |  |  | 79,000,000 | 12,000,000 |  |  |  |  |  |  |  |  |
Income tax credits, expiration |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2013 |  | Dec. 31, 2027 |  |  |
NOL |  |  |  | 518,000,000 | 4,806,000,000 |  |  |  |  |  |  |  |  |  |  |
NOL, expiration |  |  |  |  |  |  |  |  |  | 2013 |  | 2032 |  |  |  |
Deferred income tax assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax credit carryforwards | 61,000,000 | 158,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net operating losses (NOL) | 247,000,000 | 300,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation and employee benefit liabilities | 383,000,000 | 324,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Environmental liabilities | 83,000,000 | 78,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories | 258,000,000 | 273,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment | 78,000,000 | 14,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other | 157,000,000 | 160,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total deferred income tax assets | 1,267,000,000 | 1,307,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Less: valuation allowance | (304,000,000) | (295,000,000) |  |  |  |  |  | (297,000,000) | (7,000,000) |  |  |  |  |  |  |
Net deferred income tax assets | 963,000,000 | 1,012,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred income tax liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Turnarounds | (300,000,000) | (310,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment | (6,143,000,000) | (5,292,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories | (381,000,000) | (274,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other | (103,000,000) | (119,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total deferred income tax liabilities | (6,927,000,000) | (5,995,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net deferred income tax liabilities | (5,964,000,000) | (4,983,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valuation Allowance Allocation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax assets valuation allowance | 304,000,000 | 295,000,000 |  |  |  |  |  | 297,000,000 | 7,000,000 |  |  |  |  |  |  |
Reconciliation of the Change in Unrecognized Tax Benefits RollForward |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance as of beginning of year | 326,000,000 | 330,000,000 | 484,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Additions based on tax positions related to the current year | 11,000,000 | 14,000,000 | 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Additions for tax positions related to prior years | 40,000,000 | 55,000,000 | 49,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Reductions for tax positions related to prior years | (36,000,000) | (66,000,000) | (203,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |
Reductions for tax positions related to the lapse of applicable statute of limitations | 0 | (3,000,000) | (4,000,000) |  |  |  |  |  |  |  |  |  |  |  |  |
Settlements | 0 | (4,000,000) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Balance as of end of year | 341,000,000 | 326,000,000 | 330,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statutory federal income tax rate | 35.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset impairment loss |  |  |  |  |  |  |  |  |  |  |  |  |  | 333,000,000 | 595,000,000 | 928,000,000
Income tax benefit related to discontinued operations |  | 4,000,000 | 370,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative undistributed earnings of foreign subsidiaries | 3,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax benefits if recognized that would impact the effective tax rate | 144,000,000 | 135,000,000 | 153,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense and penalties recognized | 23,000,000 | 1,000,000 | 19,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense and penalties accrued | $ 133,000,000 | $ 110,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(3) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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