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Equity-based Awards, Profits Interest Awards (Details) - Profits Interests Awards [Member]
$ in Millions
 3 Months Ended
Mar. 31, 2016
USD ($)
shares
EPD PubCo I [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 30 days
Common units owned by Employee Partnership (in units) | shares 2,723,052
Class A Capital Base $ 63.5 [1]
Class A Partner Preferred Return Rate (in hundredths) 0.066638 [2]
Expected Liquidation Date Feb. 01, 2020
Aggregate grant date fair value $ 13.2 [3]
Unrecognized Compensation Expense [Abstract]  
Unrecognized compensation cost $ 12.7 [4]
Recognition period for total unrecognized compensation cost (in years) 3 years 10 months 24 days
Estimated Grant Date Fair Value Assumptions [Abstract]  
Expected Life of Award (in years) 4 years
Risk-Free Interest Rate (in hundredths) 1.09%
Expected Distribution Yield (in hundredths) 6.68%
Expected Unit Price Volatility (in hundredths) 40.00%
EPD PubCo II [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 30 days
Common units owned by Employee Partnership (in units) | shares 2,834,198
Class A Capital Base $ 66.1 [1]
Class A Partner Preferred Return Rate (in hundredths) 0.066638 [2]
Expected Liquidation Date Feb. 01, 2021
Aggregate grant date fair value $ 14.8 [3]
Unrecognized Compensation Expense [Abstract]  
Unrecognized compensation cost $ 14.3 [4]
Recognition period for total unrecognized compensation cost (in years) 4 years 10 months 24 days
Estimated Grant Date Fair Value Assumptions [Abstract]  
Expected Life of Award (in years) 5 years
Risk-Free Interest Rate (in hundredths) 1.25%
Expected Distribution Yield (in hundredths) 6.68%
Expected Unit Price Volatility (in hundredths) 40.00%
EPD PrivCo I [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 30 days
Common units owned by Employee Partnership (in units) | shares 1,111,438
Class A Capital Base $ 25.9 [1]
Class A Partner Preferred Return Rate (in hundredths) 0.066638 [2]
Expected Liquidation Date Feb. 01, 2021
Aggregate grant date fair value $ 5.8 [3]
Unrecognized Compensation Expense [Abstract]  
Unrecognized compensation cost $ 1.2 [4]
Recognition period for total unrecognized compensation cost (in years) 4 years 10 months 24 days
Estimated Grant Date Fair Value Assumptions [Abstract]  
Expected Life of Award (in years) 5 years
Risk-Free Interest Rate (in hundredths) 1.25%
Expected Distribution Yield (in hundredths) 6.68%
Expected Unit Price Volatility (in hundredths) 40.00%
[1] Represents the fair market value of the Enterprise common units contributed at the contribution date.
[2] For each period, the Class A Preference Return equals the Class A Capital Base, after adjusting for certain retained cash distributions and other amounts as defined in the underlying agreements, multiplied by 6.6638% divided by 365 or 366 days, as the case may be during such calendar year, multiplied by the number of days in the applicable period.
[3] Represents the total grant date fair value of the profits interest awards irrespective of how such costs will be allocated between us and EPCO and its privately held affiliates.
[4] Represents our expected share of the unrecognized compensation cost at March 31, 2016. We expect to recognize our share of the unrecognized compensation cost for EPD PubCo I, EPD PubCo II and EPD PrivCo I over a weighted-average period of 3.9 years, 4.9 years and 4.9 years, respectively.