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Debt Obligations (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 30, 2016 | Mar. 31, 2016 | Apr. 13, 2016 | Dec. 31, 2015
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding |  |  | $ 22,946.4 |  | $ 22,738.5
Other, non-principal amounts |  |  | (190.7) |  | (197.7)
Less current maturities of debt |  |  | (835.9) |  | (1,863.9)
Total long-term debt |  |  | 21,919.8 |  | 20,676.9
Debt Obligations Terms [Abstract] |  |  |  |  |
Letters of credit outstanding for facilities and motor fuel tax obligations |  |  | 2.5 |  |
Total unamortized debt issuance costs |  |  |  |  | 149.8
Senior Debt Obligations [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding |  |  | 21,472.0 |  | 21,264.1
Debt Obligations Terms [Abstract] |  |  |  |  |
Aggregate debt principal issued |  | $ 1,250.0 |  |  |
Senior Debt Obligations [Member] | Commercial Paper Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding |  |  | $ 2,072.0 |  | 1,114.1
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | variable |  |
Information regarding variable interest rates paid [Abstract] |  |  |  |  |
Variable Interest Rates Paid, Minimum (in hundredths) |  |  | 0.56% |  |
Variable Interest Rates Paid, Maximum (in hundredths) |  |  | 1.18% |  |
Weighted-Average Interest Rate Paid (in hundredths) |  |  | 0.89% |  |
Senior Debt Obligations [Member] | EPO Senior Notes AA [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding |  |  | $ 0.0 |  | 750.0
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 3.20% |  |
Maturity Date |  |  | Feb. 01, 2016 |  |
Repayment of debt obligations |  |  | $ 750.0 |  |
Senior Debt Obligations [Member] | EPO 364-Day Credit Agreement [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding |  |  | $ 0.0 |  | 0.0
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | variable |  |
Maturity Date |  |  | Sep. 14, 2016 |  |
Senior Debt Obligations [Member] | EPO Senior Notes L [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding |  |  | $ 800.0 |  | 800.0
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 6.30% |  |
Maturity Date |  |  | Sep. 01, 2017 |  |
Senior Debt Obligations [Member] | EPO Senior Notes V [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding |  |  | $ 349.7 |  | 349.7
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | variable |  |
Maturity Date |  |  | Sep. 15, 2020 |  |
Information regarding variable interest rates paid [Abstract] |  |  |  |  |
Variable Interest Rates Paid, Minimum (in hundredths) |  |  | 1.43% |  |
Variable Interest Rates Paid, Maximum (in hundredths) |  |  | 1.43% |  |
Weighted-Average Interest Rate Paid (in hundredths) |  |  | 1.43% |  |
Senior Debt Obligations [Member] | EPO Senior Notes CC [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding |  |  | $ 650.0 |  | 650.0
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 3.70% |  |
Maturity Date |  |  | Feb. 15, 2026 |  |
Senior Debt Obligations [Member] | EPO Senior Notes D [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding |  |  | $ 500.0 |  | 500.0
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 5.10% |  |
Maturity Date |  |  | Feb. 15, 2045 |  |
Senior Debt Obligations [Member] | EPO Senior Notes QQ [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding |  |  | $ 875.0 |  | 875.0
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 4.90% |  |
Maturity Date |  |  | May 15, 2046 |  |
Aggregate debt principal issued |  | $ 100.0 |  |  |
Debt issued as percent of principal amount (in hundredths) |  | 95.516% |  |  |
Senior Debt Obligations [Member] | EPO Senior Notes NN [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding |  |  | $ 400.0 |  | 400.0
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 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 [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed |  |
Interest Rate, stated percentage (in hundredths) |  |  | 7.55% |  |
Maturity Date |  |  | Apr. 15, 2038 |  |
Senior Debt Obligations [Member] | EPO Senior Notes RR [Member] |  |  |  |  |
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate, stated percentage (in hundredths) |  |  |  | 2.85% |
Maturity Date |  | Apr. 21, 2021 |  |  |
Aggregate debt principal issued |  | $ 575.0 |  |  |
Debt issued as percent of principal amount (in hundredths) |  | 99.898% |  |  |
Senior Debt Obligations [Member] | EPO Senior Notes SS [Member] |  |  |  |  |
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate, stated percentage (in hundredths) |  |  |  | 3.95% |
Maturity Date |  | Feb. 15, 2027 |  |  |
Aggregate debt principal issued |  | $ 575.0 |  |  |
Debt issued as percent of principal amount (in hundredths) |  | 99.76% |  |  |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes A [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding | [1] |  | $ 521.1 |  | 521.1
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate Terms | [1] |  | fixed/variable |  |
Interest Rate, stated percentage (in hundredths) | [1] |  | 8.375% |  |
Maturity Date | [1] |  | Aug. 31, 2066 |  |
Date through which interest rate is fixed |  |  | 8/1/2016 |  |
Variable annual interest rate thereafter, variable rate basis |  |  | 3-month LIBOR |  |
Variable interest rate (in hundredths) |  |  | 3.708% |  |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes C [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding | [2] |  | $ 256.4 |  | 256.4
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate Terms | [2] |  | fixed/variable |  |
Interest Rate, stated percentage (in hundredths) | [2] |  | 7.00% |  |
Maturity Date | [2] |  | Jun. 01, 2067 |  |
Date through which interest rate is fixed |  |  | 9/1/2017 |  |
Variable annual interest rate thereafter, variable rate basis |  |  | 3-month LIBOR |  |
Variable interest rate (in hundredths) |  |  | 2.778% |  |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes B [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding | [3] |  | $ 682.7 |  | 682.7
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate Terms | [3] |  | fixed/variable |  |
Interest Rate, stated percentage (in hundredths) | [3] |  | 7.034% |  |
Maturity Date | [3] |  | Jan. 15, 2068 |  |
Date through which interest rate is fixed |  |  | 1/15/2018 |  |
Variable annual interest rate thereafter, variable rate basis |  |  | 3-month LIBOR |  |
Variable interest rate (in hundredths) |  |  | 2.68% |  |
Minimum variable annual interest rate (in hundredths) |  |  | 7.034% |  |
Junior Debt Obligations [Member] | TEPPCO Junior Subordinated Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal Outstanding |  |  | $ 14.2 |  | $ 14.2
Debt Obligations Terms [Abstract] |  |  |  |  |
Interest Rate Terms |  |  | fixed/variable |  |
Maturity Date |  |  | Jun. 01, 2067 |  |
[1] | Fixed rate of 8.375% through August 1, 2016 (i.e., first call date without a make-whole redemption premium); thereafter, variable rate based on 3-month LIBOR plus 3.708%.
[2] | Fixed rate of 7.000% through September 1, 2017 (i.e., first call date without a make-whole redemption premium); thereafter, variable rate 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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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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