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Debt Obligations (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2017 | Dec. 31, 2016
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 23,579.6 | $ 23,901.6
Other, non-principal amounts |  | (198.3) | (203.9)
Less current maturities of debt |  | (3,354.8) | (2,576.8)
Total long-term debt |  | 20,026.5 | 21,120.9
Debt Obligations Terms: |  |  |
Letters of credit outstanding |  | 66.4 |
Senior Debt Obligations [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | 22,105.2 | 22,427.2
Senior Debt Obligations [Member] | Commercial Paper Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 1,455.2 | 1,777.2
Debt Obligations Terms: |  |  |
Interest rate terms |  | variable |
Information regarding variable interest rates paid: |  |  |
Weighted-average interest rate paid |  | 1.20% |
Senior Debt Obligations [Member] | Commercial Paper Notes [Member] | Minimum [Member] |  |  |
Information regarding variable interest rates paid: |  |  |
Variable interest rates paid |  | 0.90% |
Senior Debt Obligations [Member] | Commercial Paper Notes [Member] | Maximum [Member] |  |  |
Information regarding variable interest rates paid: |  |  |
Variable interest rates paid |  | 1.53% |
Senior Debt Obligations [Member] | EPO Senior Notes L [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 800.0 | 800.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 6.30% |
Maturity date |  | Sep. 01, 2017 |
Senior Debt Obligations [Member] | EPO 364-Day Credit Agreement [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 0.0 | 0.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | variable |
Maturity date |  | Sep. 14, 2017 |
Senior Debt Obligations [Member] | EPO Senior Notes V [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 349.7 | 349.7
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 6.65% |
Maturity date |  | Apr. 15, 2018 |
Senior Debt Obligations [Member] | EPO Senior Notes OO [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 750.0 | 750.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 1.65% |
Maturity date |  | May 07, 2018 |
Senior Debt Obligations [Member] | EPO Senior Notes N [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 700.0 | 700.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 6.50% |
Maturity date |  | Jan. 31, 2019 |
Senior Debt Obligations [Member] | EPO Senior Notes LL [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 800.0 | 800.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 2.55% |
Maturity date |  | Oct. 15, 2019 |
Senior Debt Obligations [Member] | EPO Senior Notes Q [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 500.0 | 500.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 5.25% |
Maturity date |  | Jan. 31, 2020 |
Senior Debt Obligations [Member] | EPO Senior Notes Y [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 1,000.0 | 1,000.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 5.20% |
Maturity date |  | Sep. 01, 2020 |
Senior Debt Obligations [Member] | EPO Multi-Year Revolving Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 0.0 | 0.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | variable |
Maturity date |  | Sep. 15, 2020 |
Senior Debt Obligations [Member] | EPO Senior Notes RR [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 575.0 | 575.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 2.85% |
Maturity date |  | Apr. 15, 2021 |
Senior Debt Obligations [Member] | EPO Senior Notes CC [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 650.0 | 650.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 4.05% |
Maturity date |  | Feb. 15, 2022 |
Senior Debt Obligations [Member] | EPO Senior Notes HH [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 1,250.0 | 1,250.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 3.35% |
Maturity date |  | Mar. 15, 2023 |
Senior Debt Obligations [Member] | EPO Senior Notes JJ [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 850.0 | 850.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 3.90% |
Maturity date |  | Feb. 15, 2024 |
Senior Debt Obligations [Member] | EPO Senior Notes MM [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 1,150.0 | 1,150.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 3.75% |
Maturity date |  | Feb. 15, 2025 |
Senior Debt Obligations [Member] | EPO Senior Notes PP [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 875.0 | 875.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 3.70% |
Maturity date |  | Feb. 15, 2026 |
Senior Debt Obligations [Member] | EPO Senior Notes SS [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 575.0 | 575.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 3.95% |
Maturity date |  | Feb. 15, 2027 |
Senior Debt Obligations [Member] | EPO Senior Notes D [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 500.0 | 500.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 6.875% |
Maturity date |  | Mar. 01, 2033 |
Senior Debt Obligations [Member] | EPO Senior Notes H [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 350.0 | 350.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 6.65% |
Maturity date |  | Oct. 15, 2034 |
Senior Debt Obligations [Member] | EPO Senior Notes J [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 250.0 | 250.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 5.75% |
Maturity date |  | Mar. 01, 2035 |
Senior Debt Obligations [Member] | EPO Senior Notes W [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 399.6 | 399.6
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 7.55% |
Maturity date |  | Apr. 15, 2038 |
Senior Debt Obligations [Member] | EPO Senior Notes R [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 600.0 | 600.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 6.125% |
Maturity date |  | Oct. 15, 2039 |
Senior Debt Obligations [Member] | EPO Senior Notes Z [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 600.0 | 600.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 6.45% |
Maturity date |  | Sep. 01, 2040 |
Senior Debt Obligations [Member] | EPO Senior Notes BB [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 750.0 | 750.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 5.95% |
Maturity date |  | Feb. 01, 2041 |
Senior Debt Obligations [Member] | EPO Senior Notes DD [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 600.0 | 600.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 5.70% |
Maturity date |  | Feb. 15, 2042 |
Senior Debt Obligations [Member] | EPO Senior Notes EE [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 750.0 | 750.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 4.85% |
Maturity date |  | Aug. 15, 2042 |
Senior Debt Obligations [Member] | EPO Senior Notes GG [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 1,100.0 | 1,100.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 4.45% |
Maturity date |  | Feb. 15, 2043 |
Senior Debt Obligations [Member] | EPO Senior Notes II [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 1,400.0 | 1,400.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 4.85% |
Maturity date |  | Mar. 15, 2044 |
Senior Debt Obligations [Member] | EPO Senior Notes KK [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 1,150.0 | 1,150.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 5.10% |
Maturity date |  | Feb. 15, 2045 |
Senior Debt Obligations [Member] | EPO Senior Notes QQ [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 975.0 | 975.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 4.90% |
Maturity date |  | May 15, 2046 |
Senior Debt Obligations [Member] | EPO Senior Notes NN [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 400.0 | 400.0
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 4.95% |
Maturity date |  | Oct. 15, 2054 |
Senior Debt Obligations [Member] | TEPPCO Senior Notes 4 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 0.3 | 0.3
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 6.65% |
Maturity date |  | Apr. 15, 2018 |
Senior Debt Obligations [Member] | TEPPCO Senior Notes 5 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 0.4 | 0.4
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed |
Interest rate, stated percentage |  | 7.55% |
Maturity date |  | Apr. 15, 2038 |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes A [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding | [1] | $ 521.1 | 521.1
Debt Obligations Terms: |  |  |
Interest rate terms | [1] | variable |
Maturity date | [1] | Aug. 31, 2066 |
Variable annual interest rate thereafter, variable rate basis |  | 3-month LIBOR |
Variable interest rate |  | 3.708% |
Information regarding variable interest rates paid: |  |  |
Weighted-average interest rate paid |  | 4.76% |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes A [Member] | Minimum [Member] |  |  |
Information regarding variable interest rates paid: |  |  |
Variable interest rates paid |  | 4.59% |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes A [Member] | Maximum [Member] |  |  |
Information regarding variable interest rates paid: |  |  |
Variable interest rates paid |  | 4.88% |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes C [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding | [2] | $ 256.4 | 256.4
Debt Obligations Terms: |  |  |
Interest rate terms | [2] | fixed/variable |
Interest rate, stated percentage |  | 7.00% |
Maturity date | [2] | Jun. 01, 2067 |
Variable annual interest rate thereafter, variable rate basis |  | 3-month LIBOR |
Variable interest rate |  | 2.778% |
Information regarding variable interest rates paid: |  |  |
Weighted-average interest rate paid |  | 3.98% |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes C [Member] | Maximum [Member] |  |  |
Information regarding variable interest rates paid: |  |  |
Variable interest rates paid |  | 3.98% |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes B [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding | [3] | $ 682.7 | 682.7
Debt Obligations Terms: |  |  |
Interest rate terms | [3] | fixed/variable |
Interest rate, stated percentage |  | 7.034% |
Maturity date | [3] | Jan. 15, 2068 |
Variable annual interest rate thereafter, variable rate basis |  | 3-month LIBOR |
Variable interest rate |  | 2.68% |
Minimum variable annual interest rate |  | 7.034% |
Junior Debt Obligations [Member] | TEPPCO Junior Subordinated Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal outstanding |  | $ 14.2 | $ 14.2
Debt Obligations Terms: |  |  |
Interest rate terms |  | fixed/variable |
Maturity date |  | Jun. 01, 2067 |
[1] | Variable rate is reset quarterly and based on 3-month LIBOR plus 3.708%.
[2] | Fixed rate of 7.000% through May 31, 2017 (i.e., first call date without a make-whole redemption premium); thereafter, a variable rate reset quarterly and based on 3-month LIBOR plus 2.778%.
[3] | Fixed rate of 7.034% through January 15, 2018 (i.e., first call date without a make-whole redemption premium); thereafter, the rate will be the greater of 7.034% or a variable rate based on 3-month LIBOR plus 2.680%.

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- Definition The amount outstanding on a letter of credit related to operations at our facilities and motor fuel tax obligations . These letters of credit reduce the amount available for borrowing under EPO's Multi-Year Revolving Credit Facility. + References No definition available. + Details
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