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Equity and Distributions, Issuances of Equity (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |
Net cash proceeds from the issuance of common units | $ 468,400,000 us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits | $ 83,000,000 us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits |
Oiltanking Partners L.P. [Member] |  |  |
Completion of Oiltanking acquisition |  |  |
Limited partner interests acquired (in hundredths) |  |  | 65.90%us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeIncludingSubsequentAcquisitionPercentage / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember
Oiltanking Acquisition [Member] |  |  |
Completion of Oiltanking acquisition |  |  |
Total consideration for acquisition | 5,900,000,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = epd_OiltankingAcquisitionMember |  |
Oiltanking Partners L.P. - Step 1 [Member] |  |  |
Completion of Oiltanking acquisition |  |  |
Total consideration for acquisition |  |  | 4,410,000,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member
Oiltanking Partners L.P. - Step 2 [Member] |  |  |
Completion of Oiltanking acquisition |  |  |
Common units exchanged for each Oiltanking unit (in units) | 1.3 epd_BusinessCombinationCommonUnitsExchanged / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep2Member |  |
Common units issued in connection with acquisition of Oiltanking (in units) | 36,827,517 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep2Member |  |
Distribution Reinvestment Plan [Member] |  |  |
Registration Statements and Equity Offerings [Line Items] |  |  |
Maximum common units authorized for issuance (in units) | 140,000,000 us-gaap_LimitedPartnersCapitalAccountUnitsAuthorized / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_DistributionReinvestmentPlanMember |  |
Remaining units available for issuance (in units) | 25,612,270 epd_LimitedPartnersCapitalAccountRemainingUnitsAvailableForIssuance / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_DistributionReinvestmentPlanMember |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |
Number of common units issued (in units) | 1,869,079 us-gaap_PartnersCapitalAccountUnitsSaleOfUnits / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_DistributionReinvestmentPlanMember | 2,614,370 us-gaap_PartnersCapitalAccountUnitsSaleOfUnits / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_DistributionReinvestmentPlanMember |
Net cash proceeds from the issuance of common units | 61,700,000 us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_DistributionReinvestmentPlanMember | 81,000,000 us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_DistributionReinvestmentPlanMember |
Employee Unit Purchase Plan [Member] |  |  |
Registration Statements and Equity Offerings [Line Items] |  |  |
Maximum common units authorized for issuance (in units) | 8,000,000 us-gaap_LimitedPartnersCapitalAccountUnitsAuthorized / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_EmployeeUnitPurchasePlanMember |  |
Remaining units available for issuance (in units) | 7,081,315 epd_LimitedPartnersCapitalAccountRemainingUnitsAvailableForIssuance / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_EmployeeUnitPurchasePlanMember |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |
Number of common units issued (in units) | 71,753 us-gaap_PartnersCapitalAccountUnitsSaleOfUnits / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_EmployeeUnitPurchasePlanMember | 62,560 us-gaap_PartnersCapitalAccountUnitsSaleOfUnits / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_EmployeeUnitPurchasePlanMember |
Net cash proceeds from the issuance of common units | 2,500,000 us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_EmployeeUnitPurchasePlanMember | 2,000,000 us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_EmployeeUnitPurchasePlanMember |
2013 At-the-Market Registration [Member] |  |  |
Registration Statements and Equity Offerings [Line Items] |  |  |
Maximum common units authorized for issuance | 1,250,000,000 epd_LimitedPartnersCapitalAccountUnitsAuthorizedDollars / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_RegistrationAtm2013Member |  |
Remaining units available for issuance | 783,900,000 epd_LimitedPartnersCapitalAccountRemainingUnitsAvailableForIssuanceInDollars / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_RegistrationAtm2013Member |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |
Number of common units issued (in units) | 12,350,761 us-gaap_PartnersCapitalAccountUnitsSaleOfUnits / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_RegistrationAtm2013Member |  |
Gross proceeds from the sale of common units | 407,800,000 epd_GrossProceedsFromSaleOfCommonUnits / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_RegistrationAtm2013Member |  |
Net cash proceeds from the issuance of common units | 404,200,000 us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_RegistrationAtm2013Member |  |
2013 At-the-Market Registration [Member] | EPCO and affiliates [Member] |  |  |
Net Cash Proceeds from Sale of Common Units [Abstract] |  |  |
Number of common units issued (in units) | 3,225,057 us-gaap_PartnersCapitalAccountUnitsSaleOfUnits / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_RegistrationAtm2013Member / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember |  |
Net cash proceeds from the issuance of common units | $ 100,000,000 us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits / epd_RegistrationStatementsAndEquityOfferingsAxis = epd_RegistrationAtm2013Member / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember |  |

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