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Valero Energy Partners LP (Details) (USD $) | 3 Months Ended | 0 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 01, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Valero Energy Partners LP Transactions (Textual) |  |  |  |  |
Cash and temporary cash investments | $ 4,870,000,000 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 3,647,000,000 us-gaap_CashAndCashEquivalentsAtCarryingValue |  | $ 3,689,000,000 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 4,292,000,000 us-gaap_CashAndCashEquivalentsAtCarryingValue
Noncontrolling interests | 568,000,000 us-gaap_MinorityInterest |  |  | 567,000,000 us-gaap_MinorityInterest |
Line of Credit [Member] | VLP Revolver [Member] |  |  |  |  |
Valero Energy Partners LP Transactions (Textual) |  |  |  |  |
Cash consideration funded through borrowing by VLP under its revolving credit facility | 200,000,000 us-gaap_ProceedsFromLongTermLinesOfCredit / us-gaap_CreditFacilityAxis = vlo_VLPRevolverMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | 0 us-gaap_ProceedsFromLongTermLinesOfCredit / us-gaap_CreditFacilityAxis = vlo_VLPRevolverMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember |  |  |
Valero Energy Partners LP [Member] | General Partner [Member] |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |
Limited partnership, ownership percentage by parent | 2.00%us-gaap_MinorityInterestOwnershipPercentageByParent / dei_LegalEntityAxis = vlo_ValeroEnergyPartnersLPMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember |  |  | 2.00%us-gaap_MinorityInterestOwnershipPercentageByParent / dei_LegalEntityAxis = vlo_ValeroEnergyPartnersLPMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember |
Valero Energy Partners LP [Member] | Limited Partner [Member] |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |
Limited partnership, ownership percentage by parent | 69.60%us-gaap_MinorityInterestOwnershipPercentageByParent / dei_LegalEntityAxis = vlo_ValeroEnergyPartnersLPMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember |  |  | 68.60%us-gaap_MinorityInterestOwnershipPercentageByParent / dei_LegalEntityAxis = vlo_ValeroEnergyPartnersLPMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember |
Limited partnership, ownership percentage by noncontrolling owners | 28.40%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = vlo_ValeroEnergyPartnersLPMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember |  |  | 29.40%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = vlo_ValeroEnergyPartnersLPMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember |
Valero Energy Partners LP [Member] |  |  |  |  |
Valero Energy Partners LP Transactions (Textual) |  |  |  |  |
Cash and temporary cash investments | 28,000,000 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vlo_ValeroEnergyPartnersLPMember |  |  | 237,000,000 us-gaap_CashAndCashEquivalentsAtCarryingValue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vlo_ValeroEnergyPartnersLPMember |
Noncontrolling interests | 377,000,000 us-gaap_MinorityInterest / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vlo_ValeroEnergyPartnersLPMember |  |  | 375,000,000 us-gaap_MinorityInterest / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vlo_ValeroEnergyPartnersLPMember |
Houston and St. Charles Terminal Services Business [Member] | Valero Energy Partners LP [Member] |  |  |  |  |
Valero Energy Partners LP Transactions (Textual) |  |  |  |  |
Proceeds from the sale of property and equipment |  |  | 571,000,000 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment / us-gaap_RelatedPartyTransactionAxis = vlo_HoustonandSt.CharlesTerminalServicesBusinessMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vlo_ValeroEnergyPartnersLPMember |  |
Aggregate value of partnership interest received |  |  | 100,000,000 us-gaap_NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1 / us-gaap_RelatedPartyTransactionAxis = vlo_HoustonandSt.CharlesTerminalServicesBusinessMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vlo_ValeroEnergyPartnersLPMember |  |
Houston and St. Charles Terminal Services Business [Member] | Valero Energy Partners LP [Member] | Valero Energy Partners LP [Member] |  |  |  |  |
Valero Energy Partners LP Transactions (Textual) |  |  |  |  |
Cash consideration funded with VLP cash on hand |  |  | 211,000,000 us-gaap_PaymentsToAcquireBusinessesGross / dei_LegalEntityAxis = vlo_ValeroEnergyPartnersLPMember / us-gaap_RelatedPartyTransactionAxis = vlo_HoustonandSt.CharlesTerminalServicesBusinessMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vlo_ValeroEnergyPartnersLPMember |  |
Houston and St. Charles Terminal Services Business [Member] | Valero Energy Partners LP [Member] | Valero Energy Partners LP [Member] | Line of Credit [Member] | VLP Revolver [Member] |  |  |  |  |
Valero Energy Partners LP Transactions (Textual) |  |  |  |  |
Cash consideration funded through borrowing by VLP under its revolving credit facility |  |  | 200,000,000 us-gaap_ProceedsFromLongTermLinesOfCredit / us-gaap_CreditFacilityAxis = vlo_VLPRevolverMember / dei_LegalEntityAxis = vlo_ValeroEnergyPartnersLPMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_RelatedPartyTransactionAxis = vlo_HoustonandSt.CharlesTerminalServicesBusinessMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vlo_ValeroEnergyPartnersLPMember |  |
Houston and St. Charles Terminal Services Business [Member] | Valero Energy Partners LP [Member] | Valero Energy Partners LP [Member] | Subordinated Debt [Member] |  |  |  |  |
Valero Energy Partners LP Transactions (Textual) |  |  |  |  |
Cash consideration funded through borrowing by VLP under a subordinated credit agreement with Parent |  |  | $ 160,000,000 us-gaap_ProceedsFromRelatedPartyDebt / dei_LegalEntityAxis = vlo_ValeroEnergyPartnersLPMember / us-gaap_LongtermDebtTypeAxis = us-gaap_SubordinatedDebtMember / us-gaap_RelatedPartyTransactionAxis = vlo_HoustonandSt.CharlesTerminalServicesBusinessMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = vlo_ValeroEnergyPartnersLPMember |  |
Houston and St. Charles Terminal Services Business [Member] | General Partner [Member] |  |  |  |  |
Valero Energy Partners LP Transactions (Textual) |  |  |  |  |
Units received from sale of property and equipment |  |  | 38,941 vlo_NoncashorPartNoncashDivestitureTypeofConsiderationReceivedStock / us-gaap_RelatedPartyTransactionAxis = vlo_HoustonandSt.CharlesTerminalServicesBusinessMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_GeneralPartnerMember |  |
Houston and St. Charles Terminal Services Business [Member] | Limited Partner [Member] |  |  |  |  |
Valero Energy Partners LP Transactions (Textual) |  |  |  |  |
Units received from sale of property and equipment |  |  | 1,908,100 vlo_NoncashorPartNoncashDivestitureTypeofConsiderationReceivedStock / us-gaap_RelatedPartyTransactionAxis = vlo_HoustonandSt.CharlesTerminalServicesBusinessMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_LimitedPartnerMember |  |

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