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Initial Public Offering of Valero Energy Partners LP (Details) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended |  |  |  | 0 Months Ended |  | 0 Months Ended |
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Aug. 01, 2011 | Dec. 31, 2010 | Dec. 31, 2013 Valero Energy Partners LP [Member] | Dec. 16, 2013 Subsidiary Issuer [Member] Valero Energy Partners LP [Member] | Dec. 31, 2013 Subsidiary Issuer [Member] Valero Energy Partners LP [Member] | Dec. 16, 2013 Subsidiary Issuer [Member] Valero Energy Partners LP [Member] Offering [Member] | Dec. 16, 2013 Subsidiary Issuer [Member] Valero Energy Partners LP [Member] Over-Allotment Option [Member] | Dec. 31, 2013 Subsidiary Issuer [Member] Limited Partner [Member] | Dec. 31, 2013 Subsidiary Issuer [Member] General Partner [Member]
Reconciliation of Net Proceeds from the Offering |  |  |  |  |  |  |  |  |  |  |  |
Total proceeds from the Offering |  |  |  |  |  |  | $ 397 |  |  |  |  |
Less offering costs |  |  |  |  |  |  | (28) |  |  |  |  |
Net proceeds from the Offering | 369 | 0 | 0 |  |  |  | 369 |  |  |  |  |
Noncontrolling Interest Transactions Textual [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Common units sold in the Offering |  |  |  |  |  |  |  |  | 17,250,000 | 2,250,000 |  |
Common unit price per unit |  |  |  |  |  |  |  |  | $ 23.00 |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 15.00% | 85.00% |  | 70.60% |  |  |  |  | 68.60% | 2.00%
Noncontrolling interest, ownership percentage by public |  |  |  |  |  |  |  |  |  |  | 29.40% |
Cash and temporary cash investments | 4,292 | 1,723 | 1,024 |  | 3,334 |  |  | 375 |  |  |  |
Noncontrolling interests | $ 486 | $ 63 |  |  |  |  |  | $ 370 |  |  |  |

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