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Derivative Instruments, Hedging Activities and Fair Value Measurements (Details) (Commodity derivatives [Member]) | Mar. 31, 2015 ft3
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Derivatives in cash flow hedging relationships [Member] | Natural gas processing: Forecasted natural gas purchases for plant thermal reduction (PTR) [Member] |  |
Derivative [Line Items] |  |
Current Volume | 12,800,000,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_NaturalGasProcessingForecastedNaturalGasPurchasesForPlantThermalReductionPtrMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | [1],[2]
Derivatives in cash flow hedging relationships [Member] | Natural gas processing: Forecasted sales of NGLs [Member] |  |
Derivative [Line Items] |  |
Current Volume | 4,200,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_NaturalGasProcessingForecastedSalesOfNglsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | [1],[2],[3]
Forecasted NGL sales designated as normal sales agreements | 1,300,000 epd_NglInventoryManagementExecutedAsNormalSalesAgreements / us-gaap_DerivativeByNatureAxis = epd_NaturalGasProcessingForecastedSalesOfNglsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember |
Derivatives in cash flow hedging relationships [Member] | Natural gas marketing: Forecasted purchases of natural gas [Member] |  |
Derivative [Line Items] |  |
Current Volume | 11,100,000,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_NaturalGasMarketingForecastedPurchasesOfNaturalGasMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | [1],[2]
Derivatives in cash flow hedging relationships [Member] | Natural gas marketing: Forecasted sales of natural gas [Member] |  |
Derivative [Line Items] |  |
Current Volume | 2,100,000,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_NaturalGasMarketingForecastedSalesOfNaturalGasMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | [1],[2]
Derivatives in cash flow hedging relationships [Member] | NGL marketing: Forecasted purchases of NGLs and related hydrocarbon products [Member] |  |
Derivative [Line Items] |  |
Current Volume | 18,500,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_NglMarketingForecastedPurchasesOfNglsAndRelatedHydrocarbonProductsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | [1],[2]
Derivatives in cash flow hedging relationships [Member] | NGL marketing: Forecasted sales of NGLs and related hydrocarbon products [Member] |  |
Derivative [Line Items] |  |
Current Volume | 18,600,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_NglMarketingForecastedSalesOfNglsAndRelatedHydrocarbonProductsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | [1],[2]
Derivatives in cash flow hedging relationships [Member] | Refined products marketing: Forecasted purchases of refined products [Member] |  |
Derivative [Line Items] |  |
Current Volume | 1,200,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_RefinedProductsMarketingForecastedPurchasesOfRefinedProductsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | [1],[2]
Derivatives in cash flow hedging relationships [Member] | Refined products marketing: Forecasted sales of refined products [Member] |  |
Derivative [Line Items] |  |
Current Volume | 1,800,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_RefinedProductsMarketingForecastedSalesOfRefinedProductsMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | [1],[2]
Derivatives in cash flow hedging relationships [Member] | Crude oil marketing: Forecasted purchases of crude oil [Member] |  |
Derivative [Line Items] |  |
Current Volume | 9,300,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_CrudeOilMarketingForecastedPurchasesOfCrudeOilMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | [1],[2]
Long Term Volume | 400,000 epd_LongTermVolume / us-gaap_DerivativeByNatureAxis = epd_CrudeOilMarketingForecastedPurchasesOfCrudeOilMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | [1],[2]
Derivatives in cash flow hedging relationships [Member] | Crude oil marketing: Forecasted sales of crude oil [Member] |  |
Derivative [Line Items] |  |
Current Volume | 11,500,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_CrudeOilMarketingForecastedSalesOfCrudeOilMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | [1],[2]
Long Term Volume | 400,000 epd_LongTermVolume / us-gaap_DerivativeByNatureAxis = epd_CrudeOilMarketingForecastedSalesOfCrudeOilMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_CashFlowHedgingMember | [1],[2]
Derivatives in fair value hedging relationships [Member] | Natural gas marketing: Natural gas storage inventory management activities [Member] |  |
Derivative [Line Items] |  |
Current Volume | 3,500,000,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_NaturalGasMarketingNaturalGasStorageInventoryManagementActivitiesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_FairValueHedgingMember | [1],[2]
Derivatives in fair value hedging relationships [Member] | Refined products marketing: Refined products inventory management activities [Member] |  |
Derivative [Line Items] |  |
Current Volume | 1,100,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_RefinedProductsMarketingRefinedProductsInventoryManagementActivitiesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = us-gaap_FairValueHedgingMember | [1],[2]
Derivatives in mark-to-market relationships [Member] | Natural gas risk management activities [Member] |  |
Derivative [Line Items] |  |
Current Volume | 89,500,000,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_NaturalGasRiskManagementActivitiesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = epd_MarkToMarketMember | [1],[2],[4],[5]
Long Term Volume | 10,000,000,000 epd_LongTermVolume / us-gaap_DerivativeByNatureAxis = epd_NaturalGasRiskManagementActivitiesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = epd_MarkToMarketMember | [1],[2],[4],[5]
Current natural gas hedging volumes designated as an index plus or minus a discount | 56,200,000,000 epd_ShortTermNaturalGasRiskManagementDerivativesDesignatedAsHedgingActivitiesPricedBasedOnIndex / us-gaap_DerivativeByNatureAxis = epd_NaturalGasRiskManagementActivitiesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = epd_MarkToMarketMember |
Derivatives in mark-to-market relationships [Member] | NGL risk management activities [Member] |  |
Derivative [Line Items] |  |
Current Volume | 1,800,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_NGLRiskManagementActivitiesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = epd_MarkToMarketMember | [1],[2],[4]
Derivatives in mark-to-market relationships [Member] | Crude oil risk management activities [Member] |  |
Derivative [Line Items] |  |
Current Volume | 5,500,000 epd_CurrentVolume / us-gaap_DerivativeByNatureAxis = epd_CrudeOilRiskManagementActivitiesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember / us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis = epd_MarkToMarketMember | [1],[2],[4]
[1] | The maximum term for derivatives designated as cash flow hedges, derivatives designated as fair value hedges and derivatives not designated as hedging instruments is June 2016, February 2016 and March 2018, respectively.
[2] | Volume for derivatives designated as hedging instruments reflects the total amount of volumes hedged whereas volume for derivatives not designated as hedging instruments reflects the absolute value of derivative notional volumes.
[3] | Forecasted sales of NGL volumes under natural gas processing exclude 1.3 MMBbls of additional hedges executed under contracts that have been designated as normal sales agreements.
[4] | Reflects the use of derivative instruments to manage risks associated with transportation, processing and storage assets.
[5] | Current volumes include 56.2 Bcf of physical derivative instruments that are predominantly priced at a marked-based index plus a premium or minus a discount related to location differences.

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- Definition The volumes expected to be settled within one year after the date indicated in accordance with derivative instruments. + References No definition available. + Details
Name: | epd_CurrentVolume
Namespace Prefix: | epd_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- Definition The volumes expected to be settled at least one year after the date indicated in accordance with derivative instruments. + References No definition available. + Details
Name: | epd_LongTermVolume
Namespace Prefix: | epd_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

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- Definition The amount of normal sales agreements related to forecasted NGL sales. + References No definition available. + Details
Name: | epd_NglInventoryManagementExecutedAsNormalSalesAgreements
Namespace Prefix: | epd_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- Definition The derivative instruments entered into in connection with natural gas risk management activities by the entity. Represents the short term contracts that are priced as an index plus a premium or minus a discount. + References No definition available. + Details
Name: | epd_ShortTermNaturalGasRiskManagementDerivativesDesignatedAsHedgingActivitiesPricedBasedOnIndex
Namespace Prefix: | epd_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration