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Earnings Per Unit (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Numerator:                      
Net income attributable to limited partners $ 659.8us-gaap_NetIncomeLoss $ 691.1us-gaap_NetIncomeLoss $ 637.7us-gaap_NetIncomeLoss $ 798.8us-gaap_NetIncomeLoss $ 698.9us-gaap_NetIncomeLoss $ 592.0us-gaap_NetIncomeLoss $ 552.5us-gaap_NetIncomeLoss $ 753.5us-gaap_NetIncomeLoss $ 2,787.4us-gaap_NetIncomeLoss $ 2,596.9us-gaap_NetIncomeLoss $ 2,419.9us-gaap_NetIncomeLoss
Undistributed earnings allocated and cash payments on phantom unit awards                 (5.2)us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic [1] 0us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic [1] 0us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic [1]
Net income available to common unitholders                 2,782.2epd_NetIncomeAvailableToCommonUnitholders 2,596.9epd_NetIncomeAvailableToCommonUnitholders 2,419.9epd_NetIncomeAvailableToCommonUnitholders
Denominator:                      
Basic weighted-average number of common units outstanding (in units)                 1,848.7us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding 1,788.0us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding 1,723.6us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding
Basic earnings per unit:                      
Basic earnings per unit (in dollars per unit) $ 0.35us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax $ 0.38us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax $ 0.35us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax $ 0.44us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax $ 0.38us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax $ 0.33us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax $ 0.31us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax $ 0.43us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax $ 1.51us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax $ 1.45us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax $ 1.40us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax
Numerator:                      
Net income attributable to limited partners $ 659.8us-gaap_NetIncomeLoss $ 691.1us-gaap_NetIncomeLoss $ 637.7us-gaap_NetIncomeLoss $ 798.8us-gaap_NetIncomeLoss $ 698.9us-gaap_NetIncomeLoss $ 592.0us-gaap_NetIncomeLoss $ 552.5us-gaap_NetIncomeLoss $ 753.5us-gaap_NetIncomeLoss $ 2,787.4us-gaap_NetIncomeLoss $ 2,596.9us-gaap_NetIncomeLoss $ 2,419.9us-gaap_NetIncomeLoss
Denominator:                      
Distribution-bearing common units (in units)                 1,848.7us-gaap_WeightedAverageLimitedPartnershipUnitsOutstandingDiluted 1,788.0us-gaap_WeightedAverageLimitedPartnershipUnitsOutstandingDiluted 1,723.6us-gaap_WeightedAverageLimitedPartnershipUnitsOutstandingDiluted
Designated Units (in units)                 42.7epd_IncrementalCommonSharesTemporarilyWaiveCashDistributions 46.8epd_IncrementalCommonSharesTemporarilyWaiveCashDistributions 51.0epd_IncrementalCommonSharesTemporarilyWaiveCashDistributions
Class B units (in units)                 0epd_WeightedAverageNumberOfSharesClassBUnits [2] 5.4epd_WeightedAverageNumberOfSharesClassBUnits [2] 9.0epd_WeightedAverageNumberOfSharesClassBUnits [2]
Phantom units (in units)                 2.9us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights [1] 0us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights [1] 0us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights [1]
Incremental option units (in units)                 0.9us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants 2.4us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants 2.8us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants
Total (in units)                 1,895.2us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 1,842.6us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 1,786.4us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Diluted earnings per unit:                      
Diluted earnings per unit (in dollars per unit) $ 0.34us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted $ 0.37us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted $ 0.34us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted $ 0.43us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted $ 0.37us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted $ 0.32us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted $ 0.30us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted $ 0.41us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted $ 1.47us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted $ 1.41us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted $ 1.35us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted
[1] Each phantom unit award includes a DER, which entitles the recipient to receive cash payments equal to the product of the number of phantom unit awards and the cash distribution per unit paid to Enterprise's common unitholders. Cash payments made in connection with DERs are nonforfeitable. As a result, the phantom units are considered participating securities for purposes of computing basic earnings per unit. Phantom unit awards were first issued in February 2014.
[2] The Class B units automatically converted into an equal number of distribution-bearing common units in August 2013.