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v2.4.1.9

Price Risk Management Activities (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 1 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jan. 31, 2015
Price Risk Management Activities (Textual) |  |  |  |
Compliance program costs | $ 372 us-gaap_CostOfGoodsSoldOverhead | $ 517 us-gaap_CostOfGoodsSoldOverhead | $ 250 us-gaap_CostOfGoodsSoldOverhead |
Foreign Currency Contract [Member] |  |  |  |
Price Risk Management Activities (Textual) |  |  |  |
Monetary notional amount of derivative liabilities | 377 us-gaap_DerivativeLiabilityNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember |  |  |
Foreign Currency Contract [Member] | Subsequent Event [Member] |  |  |  |
Price Risk Management Activities (Textual) |  |  |  |
Foreign currency commitments maturity date |  |  |  | Jan. 31, 2015
Gain (loss) recognized in income on derivatives |  |  |  | $ 12 us-gaap_DerivativeGainLossOnDerivativeNet / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Fair Value Hedging [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_FairValueHedgingMember |  |  |
Cash Flow Hedging [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember |  |  |
Economic Hedging [Member] | Swap [Member] | Long (Purchases) [Member] | Maturity Year Two [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 7,532 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_SwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Economic Hedging [Member] | Swap [Member] | Long (Purchases) [Member] | Maturity Year Three [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_SwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Economic Hedging [Member] | Swap [Member] | Short (Sales) [Member] | Maturity Year Two [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 5,676 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_SwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Economic Hedging [Member] | Swap [Member] | Short (Sales) [Member] | Maturity Year Three [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_SwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Economic Hedging [Member] | Future [Member] | Long (Purchases) [Member] | Maturity Year Two [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 46,886 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Economic Hedging [Member] | Future [Member] | Long (Purchases) [Member] | Maturity Year Two [Member] | Grain (In bushels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 20,815,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = vlo_GrainInBushelsMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Economic Hedging [Member] | Future [Member] | Long (Purchases) [Member] | Maturity Year Two [Member] | Soybean Oil (in pounds) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 94,920,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = vlo_SoybeanOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Economic Hedging [Member] | Future [Member] | Long (Purchases) [Member] | Maturity Year Three [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Economic Hedging [Member] | Future [Member] | Long (Purchases) [Member] | Maturity Year Three [Member] | Grain (In bushels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 80,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = vlo_GrainInBushelsMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Economic Hedging [Member] | Future [Member] | Long (Purchases) [Member] | Maturity Year Three [Member] | Soybean Oil (in pounds) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = vlo_SoybeanOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Economic Hedging [Member] | Future [Member] | Short (Sales) [Member] | Maturity Year Two [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 67,600 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Economic Hedging [Member] | Future [Member] | Short (Sales) [Member] | Maturity Year Two [Member] | Grain (In bushels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 46,585,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = vlo_GrainInBushelsMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Economic Hedging [Member] | Future [Member] | Short (Sales) [Member] | Maturity Year Two [Member] | Soybean Oil (in pounds) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 178,920,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = vlo_SoybeanOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Economic Hedging [Member] | Future [Member] | Short (Sales) [Member] | Maturity Year Three [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Economic Hedging [Member] | Future [Member] | Short (Sales) [Member] | Maturity Year Three [Member] | Grain (In bushels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 1,155,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = vlo_GrainInBushelsMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Economic Hedging [Member] | Future [Member] | Short (Sales) [Member] | Maturity Year Three [Member] | Soybean Oil (in pounds) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = vlo_SoybeanOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Economic Hedging [Member] | Options Held [Member] | Long (Purchases) [Member] | Maturity Year Two [Member] | Natural Gas (In millions of btus) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 1,250,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_OptionMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = vlo_NaturalGasInBtusMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Economic Hedging [Member] | Options Held [Member] | Long (Purchases) [Member] | Maturity Year Three [Member] | Natural Gas (In millions of btus) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_OptionMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = vlo_NaturalGasInBtusMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Economic Hedging [Member] | Forward Contracts [Member] | Long (Purchases) [Member] | Maturity Year Two [Member] | Grain (In bushels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 25,327,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = vlo_GrainInBushelsMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Economic Hedging [Member] | Forward Contracts [Member] | Long (Purchases) [Member] | Maturity Year Three [Member] | Grain (In bushels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 1,081,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_ForwardContractsMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = vlo_EconomicHedgingMember / us-gaap_EnergyAxis = vlo_GrainInBushelsMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Trading Derivatives [Member] | Swap [Member] | Long (Purchases) [Member] | Maturity Year Two [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 645 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_SwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Trading Derivatives [Member] | Swap [Member] | Long (Purchases) [Member] | Maturity Year Three [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_SwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Trading Derivatives [Member] | Swap [Member] | Short (Sales) [Member] | Maturity Year Two [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 645 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_SwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Trading Derivatives [Member] | Swap [Member] | Short (Sales) [Member] | Maturity Year Three [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_SwapMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Trading Derivatives [Member] | Future [Member] | Long (Purchases) [Member] | Maturity Year Two [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 95,709 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Trading Derivatives [Member] | Future [Member] | Long (Purchases) [Member] | Maturity Year Two [Member] | Natural Gas (In millions of btus) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 6,200,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = vlo_NaturalGasInBtusMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Trading Derivatives [Member] | Future [Member] | Long (Purchases) [Member] | Maturity Year Three [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 5,116 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Trading Derivatives [Member] | Future [Member] | Long (Purchases) [Member] | Maturity Year Three [Member] | Natural Gas (In millions of btus) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = vlo_NaturalGasInBtusMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Trading Derivatives [Member] | Future [Member] | Short (Sales) [Member] | Maturity Year Two [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 96,897 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Trading Derivatives [Member] | Future [Member] | Short (Sales) [Member] | Maturity Year Two [Member] | Natural Gas (In millions of btus) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 4,200,000 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = vlo_NaturalGasInBtusMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Trading Derivatives [Member] | Future [Member] | Short (Sales) [Member] | Maturity Year Three [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 4,341 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Trading Derivatives [Member] | Future [Member] | Short (Sales) [Member] | Maturity Year Three [Member] | Natural Gas (In millions of btus) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_FutureMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = vlo_NaturalGasInBtusMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Trading Derivatives [Member] | Options Held [Member] | Long (Purchases) [Member] | Maturity Year Two [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 1,900 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_OptionMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Trading Derivatives [Member] | Options Held [Member] | Long (Purchases) [Member] | Maturity Year Three [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_OptionMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_LongMember |  |  |
Trading Derivatives [Member] | Options Held [Member] | Short (Sales) [Member] | Maturity Year Two [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 1,200 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_OptionMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearTwoMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |
Trading Derivatives [Member] | Options Held [Member] | Short (Sales) [Member] | Maturity Year Three [Member] | Crude Oil (In thousands of barrels) [Member] |  |  |  |
Volume of Outstanding Contracts |  |  |  |
Nonmonetary notional amount of price risk derivatives | 0 invest_DerivativeNonmonetaryNotionalAmount / us-gaap_DerivativeByNatureAxis = us-gaap_OptionMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CommodityMember / us-gaap_EnergyAxis = us-gaap_CrudeOilMember / vlo_MaturityTimePeriodAxis = vlo_MaturityYearThreeMember / us-gaap_PositionAxis = us-gaap_ShortMember |  |  |

X
- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNonmonetaryNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:decimalItemType
Balance Type: | na
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