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Acquisition of Oiltanking Partners, L.P., Pro Forma Earnings Data (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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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
Basic earnings per unit [Abstract] |  |  |  |  |  |  |  |  |  |  |
As reported basic units outstanding (in units) |  |  |  |  |  |  |  |  | 1,848.7 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding | 1,788.0 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding | 1,723.6 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding
As reported basic earnings per unit (in dollars per unit) | $ 0.35 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax | $ 0.38 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax | $ 0.35 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax | $ 0.44 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax | $ 0.38 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax | $ 0.33 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax | $ 0.31 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax | $ 0.43 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax | $ 1.51 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax | $ 1.45 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax | $ 1.40 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax
Diluted earnings per unit [Abstract] |  |  |  |  |  |  |  |  |  |  |
As reported diluted units outstanding (in units) |  |  |  |  |  |  |  |  | 1,895.2 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 1,842.6 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 1,786.4 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
As reported diluted earnings per unit (in dollars per unit) | $ 0.34 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | $ 0.37 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | $ 0.34 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | $ 0.43 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | $ 0.37 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | $ 0.32 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | $ 0.30 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | $ 0.41 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | $ 1.47 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | $ 1.41 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | $ 1.35 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted
Oiltanking Partners L.P. [Member] |  |  |  |  |  |  |  |  |  |  |
Pro forma earnings data [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 48,087.5 us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | $ 47,875.7 us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |
Costs and expenses |  |  |  |  |  |  |  |  | 44,509.0 epd_BusinessAcquisitionsProFormaCostsAndExpenses / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | 44,522.3 epd_BusinessAcquisitionsProFormaCostsAndExpenses / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |
Operating income |  |  |  |  |  |  |  |  | 3,838.0 epd_BusinessAcquisitionsProFormaOperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | 3,520.7 epd_BusinessAcquisitionsProFormaOperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |
Net income |  |  |  |  |  |  |  |  | 2,877.5 epd_BusinessAcquisitionProFormaProfitLoss / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | 2,632.8 epd_BusinessAcquisitionProFormaProfitLoss / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |
Net income attributable to noncontrolling interest |  |  |  |  |  |  |  |  | 75.0 epd_BusinessAcquisitionProFormaNetIncomeLossAttributableToNoncontrollingInterest / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | 39.5 epd_BusinessAcquisitionProFormaNetIncomeLossAttributableToNoncontrollingInterest / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |
Net income attributable to limited partners |  |  |  |  |  |  |  |  | $ 2,802.5 us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | $ 2,593.3 us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |
Basic earnings per unit [Abstract] |  |  |  |  |  |  |  |  |  |  |
As reported basic units outstanding (in units) |  |  |  |  |  |  |  |  | 1,848.7 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | 1,788.0 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |
Pro forma basic units outstanding (in units) |  |  |  |  |  |  |  |  | 1,903.5 epd_BusinessAcquisitionProFormaSharesOutstandingBasic / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | 1,842.8 epd_BusinessAcquisitionProFormaSharesOutstandingBasic / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |
As reported basic earnings per unit (in dollars per unit) |  |  |  |  |  |  |  |  | $ 1.51 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | $ 1.45 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |
Pro forma basic earnings per unit (in dollars per unit) |  |  |  |  |  |  |  |  | $ 1.47 us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | $ 1.41 us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |
Diluted earnings per unit [Abstract] |  |  |  |  |  |  |  |  |  |  |
As reported diluted units outstanding (in units) |  |  |  |  |  |  |  |  | 1,895.2 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | 1,842.6 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |
Pro forma diluted units outstanding (in units) |  |  |  |  |  |  |  |  | 1,950.0 epd_BusinessAcquisitionProFormaSharesOutstandingDiluted / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | 1,897.4 epd_BusinessAcquisitionProFormaSharesOutstandingDiluted / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |
As reported diluted earnings per unit (in dollars per unit) |  |  |  |  |  |  |  |  | $ 1.47 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | $ 1.41 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |
Pro forma diluted earnings per unit (in dollars per unit) |  |  |  |  |  |  |  |  | $ 1.44 us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember | $ 1.37 us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPMember |

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