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Property, Plant and Equipment (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross $ 38,842.1us-gaap_PropertyPlantAndEquipmentGross   $ 38,046.7us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation 8,474.5us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment   8,165.1us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property, plant and equipment, net 30,367.6us-gaap_PropertyPlantAndEquipmentNet   29,881.6us-gaap_PropertyPlantAndEquipmentNet
Summary of depreciation expense and capitalized interest [Abstract]      
Depreciation expense 291.3us-gaap_Depreciation [1] 267.9us-gaap_Depreciation [1]  
Capitalized interest 29.6us-gaap_InterestCostsCapitalized [2] 18.5us-gaap_InterestCostsCapitalized [2]  
Asset Retirement Obligations [Roll Forward]      
Balance at beginning of period 98.3us-gaap_AssetRetirementObligation    
Liabilities incurred 0us-gaap_AssetRetirementObligationLiabilitiesIncurred    
Liabilities settled (3.3)us-gaap_AssetRetirementObligationLiabilitiesSettled    
Revisions in estimated cash flows 11.0us-gaap_AssetRetirementObligationRevisionOfEstimate    
Accretion expense 1.6us-gaap_AssetRetirementObligationAccretionExpense    
Balance at end of period 107.6us-gaap_AssetRetirementObligation    
Capitalized costs, asset retirement costs 32.9us-gaap_CapitalizedCostsAssetRetirementCosts   31.3us-gaap_CapitalizedCostsAssetRetirementCosts
Forecasted accretion expense [Abstract]      
Remainder of 2015 4.7epd_AccretionExpenseForecastRemainderOfCurrentFiscalYear    
2016 6.4epd_AccretionExpenseForecastSecondFullFiscalYearAfterEndOfCurrentFiscalYear    
2017 6.8epd_AccretionExpenseForecastThirdFullFiscalYearAfterEndOfCurrentFiscalYear    
2018 7.3epd_AccretionExpenseForecastFourthFullFiscalYearAfterEndOfCurrentFiscalYear    
2019 7.9epd_AccretionExpenseForecastFifthFullFiscalYearAfterEndOfCurrentFiscalYear    
Plants, pipelines and facilities [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross 31,153.8us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= epd_PlantsPipelinesAndFacilitiesMember		 [3]   30,834.9us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= epd_PlantsPipelinesAndFacilitiesMember		 [3]
Plants, pipelines and facilities [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 3 years [3],[4]    
Plants, pipelines and facilities [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 45 years [3],[4]    
Underground and other storage facilities [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross 2,609.3us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= epd_UndergroundAndOtherStorageFacilitiesMember		 [5]   2,584.2us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= epd_UndergroundAndOtherStorageFacilitiesMember		 [5]
Underground and other storage facilities [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 5 years [5],[6]    
Underground and other storage facilities [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 40 years [5],[6]    
Platforms and facilities [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross 659.7us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= epd_PlatformsAndFacilitiesMember		 [7]   659.7us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= epd_PlatformsAndFacilitiesMember		 [7]
Platforms and facilities [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 20 years [7]    
Platforms and facilities [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 31 years [7]    
Transportation equipment [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross 158.7us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_TransportationEquipmentMember		 [8]   154.2us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_TransportationEquipmentMember		 [8]
Transportation equipment [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 3 years [8]    
Transportation equipment [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 10 years [8]    
Marine vessels [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross 803.1us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MarineServicesEquipmentMember		 [9]   796.4us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MarineServicesEquipmentMember		 [9]
Marine vessels [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 15 years [9]    
Marine vessels [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 30 years [9]    
Land [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross 260.9us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember		   262.6us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
Construction in progress [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Property, plant and equipment, gross $ 3,196.6us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember		   $ 2,754.7us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember
Processing plants [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 20 years    
Processing plants [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 35 years    
Pipelines and related equipment [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 5 years    
Pipelines and related equipment [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 45 years    
Terminal facilities [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 10 years    
Terminal facilities [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 35 years    
Office furniture and equipment [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 3 years    
Office furniture and equipment [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 20 years    
Buildings [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 20 years    
Buildings [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 40 years    
Laboratory and shop equipment [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 5 years    
Laboratory and shop equipment [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 35 years    
Underground storage facilities [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 5 years    
Underground storage facilities [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 35 years    
Storage tanks [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 10 years    
Storage tanks [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 40 years    
Water wells [Member] | Minimum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 5 years    
Water wells [Member] | Maximum [Member]      
Property, plant and equipment and accumulated depreciation [Abstract]      
Estimated useful life 35 years    
[1] Depreciation expense is a component of "Costs and expenses" as presented on our Unaudited Condensed Statements of Consolidated Operations.
[2] We capitalize interest costs incurred on funds used to construct property, plant and equipment while the asset is in its construction phase. The capitalized interest is recorded as part of the asset to which it relates and is amortized over the asset's estimated useful life as a component of depreciation expense. When capitalized interest is recorded, it reduces interest expense from what it would be otherwise.
[3] Plants, pipelines and facilities include processing plants; NGL, natural gas, crude oil and petrochemical and refined products pipelines; terminal loading and unloading facilities; office furniture and equipment; buildings; laboratory and shop equipment and related assets.
[4] In general, the estimated useful lives of major assets within this category are: processing plants, 20-35 years; pipelines and related equipment, 5-45 years; terminal facilities, 10-35 years; office furniture and equipment, 3-20 years; buildings, 20-40 years; and laboratory and shop equipment, 5-35 years.
[5] Underground and other storage facilities include underground product storage caverns; above ground storage tanks; water wells and related assets.
[6] In general, the estimated useful lives of assets within this category are: underground storage facilities, 5-35 years; storage tanks, 10-40 years; and water wells, 5-35 years.
[7] Platforms and facilities include offshore platforms and related facilities and other associated assets located in the Gulf of Mexico.
[8] Transportation equipment includes tractor-trailer tank trucks and other vehicles and similar assets used in our operations.
[9] Marine vessels include tow boats, barges and related equipment used in our marine transportation business.