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Supplemental Cash Flow Information (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Decrease (increase) in:      
Accounts receivable - trade $ 837.5us-gaap_IncreaseDecreaseInAccountsReceivable $ 483.3us-gaap_IncreaseDecreaseInAccountsReceivable  
Accounts receivable - related parties (0.6)us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties 1.3us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties  
Inventories 161.0us-gaap_IncreaseDecreaseInInventories 65.7us-gaap_IncreaseDecreaseInInventories  
Prepaid and other current assets (3.2)us-gaap_IncreaseDecreaseInOtherCurrentAssets 5.6us-gaap_IncreaseDecreaseInOtherCurrentAssets  
Other assets 0.5us-gaap_IncreaseDecreaseInOtherNoncurrentAssets 23.5us-gaap_IncreaseDecreaseInOtherNoncurrentAssets  
Increase (decrease) in:      
Accounts payable - trade (61.6)us-gaap_IncreaseDecreaseInAccountsPayableTrade 106.9us-gaap_IncreaseDecreaseInAccountsPayableTrade  
Accounts payable - related parties (69.6)us-gaap_IncreaseDecreaseInAccountsPayableRelatedParties (59.5)us-gaap_IncreaseDecreaseInAccountsPayableRelatedParties  
Accrued product payables (768.7)epd_IncreaseDecreaseInAccruedProductPayable (149.1)epd_IncreaseDecreaseInAccruedProductPayable  
Accrued interest (155.6)us-gaap_IncreaseDecreaseInInterestPayableNet (132.2)us-gaap_IncreaseDecreaseInInterestPayableNet  
Other current liabilities (71.9)us-gaap_IncreaseDecreaseInOtherCurrentLiabilities (9.6)us-gaap_IncreaseDecreaseInOtherCurrentLiabilities  
Other liabilities (6.8)us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities 6.6us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities  
Net effect of changes in operating accounts (139.0)us-gaap_IncreaseDecreaseInOperatingCapital 342.5us-gaap_IncreaseDecreaseInOperatingCapital  
Liability for construction in progress expenditures 386.6us-gaap_ConstructionInProgressExpendituresIncurredButNotYetPaid   372.8us-gaap_ConstructionInProgressExpendituresIncurredButNotYetPaid
Significant Acquisitions and Disposals [Line Items]      
Proceeds from asset sales and insurance recoveries 0.5us-gaap_ProceedsFromSaleOfProductiveAssets 96.3us-gaap_ProceedsFromSaleOfProductiveAssets  
Net gains (losses) attributable to asset sales and insurance recoveries 0.1us-gaap_GainLossOnDispositionOfAssets 89.6us-gaap_GainLossOnDispositionOfAssets  
West Storage Facilities [Member]      
Significant Acquisitions and Disposals [Line Items]      
Proceeds from asset sales and insurance recoveries 0us-gaap_ProceedsFromSaleOfProductiveAssets
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= epd_WestStorageFacilitiesMember
95.0us-gaap_ProceedsFromSaleOfProductiveAssets
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= epd_WestStorageFacilitiesMember
 
Net gains (losses) attributable to asset sales and insurance recoveries 0us-gaap_GainLossOnDispositionOfAssets
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= epd_WestStorageFacilitiesMember
95.0us-gaap_GainLossOnDispositionOfAssets
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= epd_WestStorageFacilitiesMember
 
Other Disposal of Assets [Member]      
Significant Acquisitions and Disposals [Line Items]      
Proceeds from asset sales and insurance recoveries 0.5us-gaap_ProceedsFromSaleOfProductiveAssets
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= epd_OtherAssetSalesMember
1.3us-gaap_ProceedsFromSaleOfProductiveAssets
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= epd_OtherAssetSalesMember
 
Net gains (losses) attributable to asset sales and insurance recoveries $ 0.1us-gaap_GainLossOnDispositionOfAssets
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= epd_OtherAssetSalesMember
$ (5.4)us-gaap_GainLossOnDispositionOfAssets
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= epd_OtherAssetSalesMember