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Acquisition of Oiltanking Partners, L.P., Purchase Price Allocation (Details) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Oct. 02, 2014
Liabilities assumed in business combination: |  |  |  |  |  |  |
Goodwill | $ 4,199.9 us-gaap_Goodwill |  | $ 2,080.0 us-gaap_Goodwill | $ 2,086.8 us-gaap_Goodwill | $ 2,092.3 us-gaap_Goodwill |  |
Oiltanking Partners L.P. - Step 1 [Member] |  |  |  |  |  |  |
Consideration: |  |  |  |  |  |  |
Cash | 2,438.3 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |  |  |  |  |  |
Equity instruments (54,807,352 common units of Enterprise) | 2,171.5 us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member | [1] |  |  |  |  |
Fair value of total consideration transferred in Step 1 | 4,609.8 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |  |  |  |  |  |
Indentifiable assets acquired in business combination: |  |  |  |  |  |  |
Current assets, including cash of $21.5 million |  |  |  |  |  | 68.0 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Property, plant, and equipment |  |  |  |  |  | 1,080.1 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Identifiable intangible assets: |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 2,949.1 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Other assets |  |  |  |  |  | 227.6 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Total assets acquired |  |  |  |  |  | 4,324.8 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Liabilities assumed in business combination: |  |  |  |  |  |  |
Current liabilities |  |  |  |  |  | (84.8)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Long-term debt |  |  |  |  |  | (223.3)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Other long-term liabilities |  |  |  |  |  | (129.7)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member | [2]
Total liabilities assumed |  |  |  |  |  | (437.8)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Noncontrolling interest in Oiltanking |  |  |  |  |  | (1,397.2)us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member | [3]
Total assets acquired less liabilities assumed and noncontrolling interest |  |  |  |  |  | 2,489.8 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Total consideration given for ownership interests in Oiltanking in Step 1 | 4,609.8 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |  |  |  |  |  |
Goodwill |  |  |  |  |  | 2,120.0 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Oiltanking Acquisition: |  |  |  |  |  |  |
Cash acquired |  |  |  |  |  | 21.5 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Common units issued in connection with acquisition of Oiltanking (in units) | 54,807,352 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |  |  |  |  |  |
Common unit price (in dollars per share) |  |  |  |  |  | $ 39.62 us-gaap_SharesIssuedPricePerShare / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Liquidity Option Agreement |  |  |  |  |  | 119.4 epd_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiquidityOption / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Noncontrolling interests: |  |  |  |  |  |  |
Inputs to calculate noncontrolling interests | 28,328,890 Oiltanking common units at $49.32 per unit |  |  |  |  |  |
Total related party notes receivable |  |  |  |  |  | 228.3 epd_BusinessCombinationRecognizedCurrentAndNoncurrentNotesReceivableRelatedParty / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Current portion of related party notes receivable |  |  |  |  |  | 5 epd_BusinessCombinationRecognizedCurrentNotesReceivableRelatedParty / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Long-term portion of related party notes receivable |  |  |  |  |  | 223.3 epd_BusinessCombinationRecognizedNoncurrentNotesReceivableRelatedParty / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Accrued interest |  |  |  |  |  | 2.5 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member |
Oiltanking Partners L.P. - Step 1 [Member] | Minimum [Member] |  |  |  |  |  |  |
Noncontrolling interests: |  |  |  |  |  |  |
Cash flow projections discount rate (in hundredths) | 5.50%us-gaap_FairValueInputsDiscountRate / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |
Oiltanking Partners L.P. - Step 1 [Member] | Maximum [Member] |  |  |  |  |  |  |
Noncontrolling interests: |  |  |  |  |  |  |
Cash flow projections discount rate (in hundredths) | 8.50%us-gaap_FairValueInputsDiscountRate / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |
Oiltanking Partners L.P. - Step 1 [Member] | Real Property [Member] |  |  |  |  |  |  |
Indentifiable assets acquired in business combination: |  |  |  |  |  |  |
Property, plant, and equipment |  |  |  |  |  | 95.4 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_RealEstateMember |
Oiltanking Partners L.P. - Step 1 [Member] | Personal Property [Member] |  |  |  |  |  |  |
Indentifiable assets acquired in business combination: |  |  |  |  |  |  |
Property, plant, and equipment |  |  |  |  |  | 984.7 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member / us-gaap_PropertyPlantAndEquipmentByTypeAxis = epd_PersonalPropertyMember |
Oiltanking Partners L.P. - Step 1 [Member] | Customer relationship intangibles [Member] |  |  |  |  |  |  |
Identifiable intangible assets: |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 1,192.4 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember | [4]
Oiltanking Acquisition: |  |  |  |  |  |  |
Weighted-average amortization period (in years) | 29 years |  |  |  |  |  |
Oiltanking Partners L.P. - Step 1 [Member] | Contract-based intangibles [Member] |  |  |  |  |  |  |
Identifiable intangible assets: |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 297.5 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ContractualRightsMember | [4]
Oiltanking Acquisition: |  |  |  |  |  |  |
Weighted-average amortization period (in years) | 6 years |  |  |  |  |  |
Oiltanking Partners L.P. - Step 1 [Member] | Incentive distribution rights [Member] |  |  |  |  |  |  |
Identifiable intangible assets: |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | $ 1,459.2 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = epd_OiltankingPartnersLPStep1Member / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember |
[1] | The fair value of the equity-based consideration paid in connection with Step 1 of the Oiltanking acquisition was based on the closing market price of Enterprise's common units of $39.62 per unit on the acquisition date.
[2] | Other long-term liabilities includes $119.4 million for the Liquidity Option Agreement. The fair value assigned to the Liquidity Option Agreement is provisional pending completion of certain tax-related computations. See Note 18 for information regarding this agreement.
[3] | From an accounting perspective, Enterprise acquired control of Oiltanking as a result of completing Step 1. In accordance with ASC 805, Business Combinations, the estimated fair value of Oiltanking's common units held by parties other than Enterprise following Step 1 (i.e., the "noncontrolling interest") is based on 28,328,890 common units held by third parties on October 1, 2014 multiplied by the closing unit price for Oiltanking common units on that date of $49.32 per unit.
[4] | The weighted-average amortization period for the customer relationship intangible assets is 29 years and for the contract-based intangible assets is six years.

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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition Amount per share or per unit of equity securities issued by non-development stage entity. + References No definition available. + Details
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