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Equity-based Awards, Restricted Unit Awards (Details) (Restricted Common Unit Awards [Member], USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting rate of restricted common unit awards (in hundredths) 25.00%epd_PercentageOfVestingRateOfEquityBasedAwards    
Summary of awards activity, equity instruments other than options [Roll Forward]      
Beginning of period (in units) 7,221,214us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber 7,786,972us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber 7,736,432us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Granted (in units)   3,549,052us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod [1] 3,177,476us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod [2]
Vested (in units) (2,634,074)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod (3,770,696)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod (2,633,206)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Forfeited (in units) (357,350)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod (344,114)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod (493,730)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
End of period (in units) 4,229,790us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber 7,221,214us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber 7,786,972us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Restricted units outstanding, weighted-average grant date fair value [Roll Forward]      
Weighted-average grant date fair value per unit, at beginning of period (in dollars per unit) $ 25.83us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue [3] $ 20.43us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue [3] $ 17.11us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue [3]
Granted weighted-average grant date fair value per unit (in dollars per unit)   $ 28.61us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue [1],[3] $ 25.98us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue [2],[3]
Vested weighted-average grant date fair value per unit (in dollars per unit) $ 23.94us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue [3] $ 17.48us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue [3] $ 17.40us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue [3]
Forfeited weighted-average grant date fair value per unit (in dollars per unit) $ 26.38us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue [3] $ 23.82us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue [3] $ 20.21us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue [3]
Weighted-average grant date fair value per unit, at end of period (in dollars per unit) $ 26.96us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue [3] $ 25.83us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue [3] $ 20.43us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue [3]
Summary of awards activity, equity instruments other than options, additional disclosures [Abstract]      
Aggregate grant date fair value   $ 101.5epd_GrantDateFairValueOfEquityAwardsIssuedDuringPeriod $ 82.5epd_GrantDateFairValueOfEquityAwardsIssuedDuringPeriod
Estimated forfeiture rate (in hundredths)   3.90%epd_GrantDateEstimatedForfeitureRateEquityAwards 3.25%epd_GrantDateEstimatedForfeitureRateEquityAwards
Cash distributions paid to restricted common unitholders 7.3epd_DistributionMadeToRestrictedCommonUnitholdersCashDistributionsPaid 10.6epd_DistributionMadeToRestrictedCommonUnitholdersCashDistributionsPaid 10.5epd_DistributionMadeToRestrictedCommonUnitholdersCashDistributionsPaid
Total intrinsic value of restricted common unit awards that vested during period 87.1us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue 109.9us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue 67.0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Unrecognized Compensation Expense [Abstract]      
Unrecognized compensation cost 28.3us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized    
Recognition period for total unrecognized compensation cost 1 year 6 months    
Minimum [Member]
      
Summary of awards activity, equity instruments other than options, additional disclosures [Abstract]      
Grant date market price of common units (in dollars per unit)   $ 28.56epd_GrantDateFairValueOfEquityAwardsIssuedPrice
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 $ 25.96epd_GrantDateFairValueOfEquityAwardsIssuedPrice
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum [Member]
      
Summary of awards activity, equity instruments other than options, additional disclosures [Abstract]      
Grant date market price of common units (in dollars per unit)   $ 31.74epd_GrantDateFairValueOfEquityAwardsIssuedPrice
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 $ 26.77epd_GrantDateFairValueOfEquityAwardsIssuedPrice
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Enterprise [Member]
      
Unrecognized Compensation Expense [Abstract]      
Unrecognized compensation cost $ 24.9us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= epd_EnterpriseMember		    
[1] The aggregate grant date fair value of restricted common unit awards issued during 2013 was $101.5 million based on a grant date market price of our common units ranging from $28.56 to $31.74 per unit. An estimated annual forfeiture rate of 3.9% was applied to these awards.
[2] The aggregate grant date fair value of restricted common unit awards issued during 2012 was $82.5 million based on a grant date market price of our common units ranging from $25.96 to $26.77 per unit. An estimated annual forfeiture rate of 3.25% was applied to these awards.
[3] Determined by dividing the aggregate grant date fair value of awards (before an allowance for forfeitures) by the number of awards issued.