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Investments in Unconsolidated Affiliates (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
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Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Investments in unconsolidated affiliates | $ 3,064.9 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures |  |  | $ 3,042.0 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures |
Equity in income (loss) of unconsolidated affiliates by business segment [Abstract] |  |  |  |  |
Equity in income of unconsolidated affiliates | 89.2 us-gaap_IncomeLossFromEquityMethodInvestments |  | 56.5 us-gaap_IncomeLossFromEquityMethodInvestments |  |
Unamortized excess cost amounts by business segment [Abstract] |  |  |  |  |
Unamortized excess cost amounts | 103.1 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity |  |  | 59.6 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity |
Equity method investment amortization of excess cost | 2.6 epd_EquityMethodInvestmentTangibleAndIntangibleAssetAmortizationExpense |  | 0.7 epd_EquityMethodInvestmentTangibleAndIntangibleAssetAmortizationExpense |  |
NGL Pipelines & Services [Member] |  |  |  |  |
Equity in income (loss) of unconsolidated affiliates by business segment [Abstract] |  |  |  |  |
Equity in income of unconsolidated affiliates | 11.6 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  | 1.4 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |
Unamortized excess cost amounts by business segment [Abstract] |  |  |  |  |
Unamortized excess cost amounts | 26.2 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  | 26.5 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |
Equity method investment amortization of excess cost | 0.3 epd_EquityMethodInvestmentTangibleAndIntangibleAssetAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  | 0.3 epd_EquityMethodInvestmentTangibleAndIntangibleAssetAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |
NGL Pipelines & Services [Member] | Venice Energy Service Company LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 13.10%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_VeniceEnergyServiceCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 27.0 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_VeniceEnergyServiceCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  | 27.7 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_VeniceEnergyServiceCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |
NGL Pipelines & Services [Member] | K/D/S Promix, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_KDSPromixLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 37.6 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_KDSPromixLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  | 38.5 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_KDSPromixLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |
NGL Pipelines & Services [Member] | Baton Rouge Fractionators LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 32.20%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_BatonRougeFractionatorsLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 18.6 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_BatonRougeFractionatorsLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  | 18.8 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_BatonRougeFractionatorsLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |
NGL Pipelines & Services [Member] | Skelly-Belvieu Pipeline Company, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_SkellyBelvieuPipelineCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 39.5 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_SkellyBelvieuPipelineCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  | 40.1 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_SkellyBelvieuPipelineCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |
NGL Pipelines & Services [Member] | Texas Express Pipeline LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 35.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_TexasExpressPipelineLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 349.6 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_TexasExpressPipelineLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  | 349.3 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_TexasExpressPipelineLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |
NGL Pipelines & Services [Member] | Texas Express Gathering LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 45.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_TexasExpressGatheringLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 37.6 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_TexasExpressGatheringLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  | 37.9 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_TexasExpressGatheringLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |
NGL Pipelines & Services [Member] | Front Range Pipeline LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 33.30%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_FrontRangePipelineLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 171.7 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_FrontRangePipelineLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |  |  | 170.0 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_FrontRangePipelineLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_NglPipelinesAndServicesMember |
Onshore Natural Gas Pipelines & Services [Member] |  |  |  |  |
Equity in income (loss) of unconsolidated affiliates by business segment [Abstract] |  |  |  |  |
Equity in income of unconsolidated affiliates | 0.9 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreNaturalGasPipelinesAndServicesMember |  | 0.9 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreNaturalGasPipelinesAndServicesMember |  |
Onshore Natural Gas Pipelines & Services [Member] | White River Hub, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_WhiteRiverHubLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreNaturalGasPipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 23.1 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_WhiteRiverHubLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreNaturalGasPipelinesAndServicesMember |  |  | 23.2 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_WhiteRiverHubLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreNaturalGasPipelinesAndServicesMember |
Onshore Crude Oil Pipelines & Services [Member] |  |  |  |  |
Equity in income (loss) of unconsolidated affiliates by business segment [Abstract] |  |  |  |  |
Equity in income of unconsolidated affiliates | 59.9 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember |  | 42.7 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember |  |
Unamortized excess cost amounts by business segment [Abstract] |  |  |  |  |
Unamortized excess cost amounts | 21.4 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember |  |  | 21.7 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember |
Equity method investment amortization of excess cost | 0.3 epd_EquityMethodInvestmentTangibleAndIntangibleAssetAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember |  | 0.2 epd_EquityMethodInvestmentTangibleAndIntangibleAssetAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember |  |
Onshore Crude Oil Pipelines & Services [Member] | Seaway Crude Pipeline Company LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_SeawayCrudePipelineCompanyMember / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 1,430.1 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_SeawayCrudePipelineCompanyMember / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember |  |  | 1,431.2 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_SeawayCrudePipelineCompanyMember / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember |
Onshore Crude Oil Pipelines & Services [Member] | Eagle Ford Pipeline LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_EagleFordPipelineMember / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 350.5 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_EagleFordPipelineMember / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember |  |  | 336.5 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_EagleFordPipelineMember / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember |
Onshore Crude Oil Pipelines & Services [Member] | Eagle Ford Terminals Corpus Christi LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_EagleFordTerminalsCorpusChristiLLCMember / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 17.3 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_EagleFordTerminalsCorpusChristiLLCMember / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember | [1] |  | 0 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_EagleFordTerminalsCorpusChristiLLCMember / us-gaap_StatementBusinessSegmentsAxis = epd_OnshoreCrudeOilPipelinesAndServicesMember | [1]
Offshore Pipelines & Services [Member] |  |  |  |  |
Equity in income (loss) of unconsolidated affiliates by business segment [Abstract] |  |  |  |  |
Equity in income of unconsolidated affiliates | 20.2 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  | 11.1 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  |
Unamortized excess cost amounts by business segment [Abstract] |  |  |  |  |
Unamortized excess cost amounts | 53.1 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  |  | 9.0 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |
Equity method investment amortization of excess cost | 2.0 epd_EquityMethodInvestmentTangibleAndIntangibleAssetAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  | 0.2 epd_EquityMethodInvestmentTangibleAndIntangibleAssetAmortizationExpense / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  |
Offshore Pipelines & Services [Member] | Poseidon Oil Pipeline Company, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 36.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_PoseidonOilPipelineCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 29.2 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_PoseidonOilPipelineCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  |  | 31.8 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_PoseidonOilPipelineCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |
Offshore Pipelines & Services [Member] | Cameron Highway Oil Pipeline Company [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_CameronHighwayOilPipelineCompanyMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 198.1 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_CameronHighwayOilPipelineCompanyMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  |  | 201.3 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_CameronHighwayOilPipelineCompanyMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |
Offshore Pipelines & Services [Member] | Deepwater Gateway LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_DeepwaterGatewayLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 78.9 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_DeepwaterGatewayLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  |  | 79.6 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_DeepwaterGatewayLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |
Offshore Pipelines & Services [Member] | Neptune Pipeline Company, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 25.70%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_NeptunePipelineCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 33.7 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_NeptunePipelineCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  |  | 34.9 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_NeptunePipelineCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |
Offshore Pipelines & Services [Member] | Southeast Keathley Canyon Pipeline Company, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_SoutheastKeathleyCanyonPipelineCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  |  |  |
Investments in unconsolidated affiliates | 147.6 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_SoutheastKeathleyCanyonPipelineCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |  |  | 146.1 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_SoutheastKeathleyCanyonPipelineCompanyLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_OffshorePipelinesAndServicesMember |
Petrochemical & Refined Products Services [Member] |  |  |  |  |
Equity in income (loss) of unconsolidated affiliates by business segment [Abstract] |  |  |  |  |
Equity in income of unconsolidated affiliates | (3.4)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = epd_PetrochemicalAndRefinedProductsServicesMember |  | 0.4 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = epd_PetrochemicalAndRefinedProductsServicesMember |  |
Unamortized excess cost amounts by business segment [Abstract] |  |  |  |  |
Unamortized excess cost amounts | 2.4 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_StatementBusinessSegmentsAxis = epd_PetrochemicalAndRefinedProductsServicesMember |  |  | 2.4 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_StatementBusinessSegmentsAxis = epd_PetrochemicalAndRefinedProductsServicesMember |
Petrochemical & Refined Products Services [Member] | Baton Rouge Propylene Concentrator, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 30.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_BatonRougePropyleneConcentratorLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_PetrochemicalAndRefinedProductsServicesMember |  |  |  |
Investments in unconsolidated affiliates | 6.1 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_BatonRougePropyleneConcentratorLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_PetrochemicalAndRefinedProductsServicesMember |  |  | 6.5 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_BatonRougePropyleneConcentratorLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_PetrochemicalAndRefinedProductsServicesMember |
Petrochemical & Refined Products Services [Member] | Centennial Pipeline LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership Interest (in hundredths) | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_CentennialPipelineLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_PetrochemicalAndRefinedProductsServicesMember |  |  |  |
Investments in unconsolidated affiliates | 66.3 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_CentennialPipelineLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_PetrochemicalAndRefinedProductsServicesMember |  |  | 66.1 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_CentennialPipelineLlcMember / us-gaap_StatementBusinessSegmentsAxis = epd_PetrochemicalAndRefinedProductsServicesMember |
Petrochemical & Refined Products Services [Member] | Other Unconsolidated Affiliates [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Investments in unconsolidated affiliates | $ 2.4 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_OtherUnconsolidatedAffiliatesMember / us-gaap_StatementBusinessSegmentsAxis = epd_PetrochemicalAndRefinedProductsServicesMember |  |  | $ 2.5 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = epd_OtherUnconsolidatedAffiliatesMember / us-gaap_StatementBusinessSegmentsAxis = epd_PetrochemicalAndRefinedProductsServicesMember |
[1] | New joint venture formed with Plains Marketing, L.P. in March 2015 to construct and operate a marine terminal that will handle crude oil delivered by Eagle Ford Pipeline LLC.

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- Definition If the price paid to acquire an ownership interest exceeded the underlying book value of the capital accounts acquired, such excess cost amounts are included within the carrying values of the investments. These costs were attributable to the underlying tangible and amortizable intangible assets of certain unconsolidated affiliates, and are amortized as a reduction in equity earnings in a manner similar to depreciation. This represents the amortization of such excess cost amounts for the period. + References No definition available. + Details
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- Definition Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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- Definition Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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