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Debt Obligations (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Feb. 29, 2024 | Jan. 31, 2024 | Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 29,721 |  | $ 29,021
Other, non-principal amounts |  |  |  | (287) |  | (273)
Less current maturities of debt |  |  |  | (1,149) |  | (1,300)
Total long-term debt |  |  |  | 28,285 |  | 27,448
Debt Obligations Terms: |  |  |  |  |  |
Repayment of debt obligations |  |  |  | 13,632 | $ 8,018 |
Letters of credit outstanding |  |  |  | 131 |  |
Senior Debt Obligations [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | 27,425 |  | 26,725
Debt Obligations Terms: |  |  |  |  |  |
Aggregate debt principal issued |  |  | $ 2,000 |  |  |
Senior Debt Obligations [Member] | Commercial Paper Notes [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 0 |  | 450
Information regarding variable interest rates paid: |  |  |  |  |  |
Weighted-average interest rate paid |  |  |  | 5.45% |  |
Senior Debt Obligations [Member] | Commercial Paper Notes [Member] | Minimum [Member] |  |  |  |  |  |
Information regarding variable interest rates paid: |  |  |  |  |  |
Variable interest rates paid |  |  |  | 5.45% |  |
Senior Debt Obligations [Member] | Commercial Paper Notes [Member] | Maximum [Member] |  |  |  |  |  |
Information regarding variable interest rates paid: |  |  |  |  |  |
Variable interest rates paid |  |  |  | 5.50% |  |
Senior Debt Obligations [Member] | EPO Senior Notes JJ, due February 2024 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 0 |  | 850
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 3.90% |  |
Repayment of debt obligations |  | $ 850 |  |  |  |
Senior Debt Obligations [Member] | EPO Senior Notes MM, due February 2025 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,150 |  | 1,150
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 3.75% |  |
Senior Debt Obligations [Member] | March 2024 $1.5 Billion EPO 364-Day Revolving Credit Agreement, due March 2025 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding | [1] |  |  | $ 0 |  | 0
Debt Obligations Terms: |  |  |  |  |  |
Credit facility interest rate description |  |  |  | SOFR, plus an additional variable spread; or (ii) an alternate base rate, which is the greatest of (a) the Prime Rate in effect on such day, (b) the Federal Funds Effective Rate in effect on such day plus 0.5%, or (c) Adjusted Term SOFR, for an interest period of one month in effect on such day plus 1%, and a variable spread. The applicable spreads are determined based on EPO's debt ratings. |  |
Maximum borrowing capacity |  |  |  | $ 1,500 |  |
Maximum bank commitments increase |  |  |  | 200 |  |
Total maximum borrowing capacity |  |  |  | 1,700 |  |
Senior Debt Obligations [Member] | EPO Senior Notes FFF, due January 2026 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 750 |  | 750
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 5.05% |  |
Senior Debt Obligations [Member] | EPO Senior Notes PP, due February 2026 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 875 |  | 875
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 3.70% |  |
Senior Debt Obligations [Member] | EPO Senior Notes HHH, due January 2027 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,000 |  | 0
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 4.60% |  |
Aggregate debt principal issued |  |  | $ 1,000 |  |  |
Debt issued as percent of principal amount |  |  | 99.897% |  |  |
Senior Debt Obligations [Member] | EPO Senior Notes SS, due February 2027[Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 575 |  | 575
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 3.95% |  |
Senior Debt Obligations [Member] | March 2023 $2.7 Billion EPO Multi-Year Revolving Credit Agreement, due March 2028 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding | [2] |  |  | $ 0 |  | 0
Debt Obligations Terms: |  |  |  |  |  |
Credit facility interest rate description |  |  |  | SOFR, plus an additional variable spread; or (ii) an alternate base rate, which is the greatest of (a) the Prime Rate in effect on such day, (b) the Federal Funds Effective Rate in effect on such day plus 0.5%, or (c) Adjusted Term SOFR, for an interest period of one month in effect on such day plus 1%, and a variable spread. The applicable spreads are determined based on EPO's debt ratings. |  |
Maximum borrowing capacity |  |  |  | $ 2,700 |  |
Maximum bank commitments increase |  |  |  | 500 |  |
Total maximum borrowing capacity |  |  |  | 3,200 |  |
Senior Debt Obligations [Member] | EPO Senior Notes WW, due October 2028 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,000 |  | 1,000
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 4.15% |  |
Senior Debt Obligations [Member] | EPO Senior Notes YY, due July 2029 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,250 |  | 1,250
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 3.125% |  |
Senior Debt Obligations [Member] | EPO Senior Notes AAA, due January 2030 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,250 |  | 1,250
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 2.80% |  |
Senior Debt Obligations [Member] | EPO Senior Notes GGG, due January 2033 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,000 |  | 1,000
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 5.35% |  |
Senior Debt Obligations [Member] | EPO Senior Notes D, due March 2033 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 500 |  | 500
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 6.875% |  |
Senior Debt Obligations [Member] | EPO Senior Notes III, due January 2034 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,000 |  | 0
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 4.85% |  |
Aggregate debt principal issued |  |  | $ 1,000 |  |  |
Debt issued as percent of principal amount |  |  | 99.705% |  |  |
Senior Debt Obligations [Member] | EPO Senior Notes H, due October 2034 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 350 |  | 350
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 6.65% |  |
Senior Debt Obligations [Member] | EPO Senior Notes J, due March 2035 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 250 |  | 250
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 5.75% |  |
Senior Debt Obligations [Member] | EPO Senior Notes W, due April 2038 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 400 |  | 400
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 7.55% |  |
Senior Debt Obligations [Member] | EPO Senior Notes R, due October 2039 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 600 |  | 600
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 6.125% |  |
Senior Debt Obligations [Member] | EPO Senior Notes Z, due September 2040 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 600 |  | 600
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 6.45% |  |
Senior Debt Obligations [Member] | EPO Senior Notes BB, due February 2041 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 750 |  | 750
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 5.95% |  |
Senior Debt Obligations [Member] | EPO Senior Notes DD, due February 2042 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 600 |  | 600
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 5.70% |  |
Senior Debt Obligations [Member] | EPO Senior Notes EE, due August 2042 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 750 |  | 750
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 4.85% |  |
Senior Debt Obligations [Member] | EPO Senior Notes GG, due February 2043 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,100 |  | 1,100
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 4.45% |  |
Senior Debt Obligations [Member] | EPO Senior Notes II, due March 2044 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,400 |  | 1,400
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 4.85% |  |
Senior Debt Obligations [Member] | EPO Senior Notes KK, due February 2045 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,150 |  | 1,150
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 5.10% |  |
Senior Debt Obligations [Member] | EPO Senior Notes QQ, due May 2046 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 975 |  | 975
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 4.90% |  |
Senior Debt Obligations [Member] | EPO Senior Notes UU, due February 2048 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,250 |  | 1,250
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 4.25% |  |
Senior Debt Obligations [Member] | EPO Senior Notes XX, due February 2049 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,250 |  | 1,250
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 4.80% |  |
Senior Debt Obligations [Member] | EPO Senior Notes ZZ, due January 2050 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,250 |  | 1,250
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 4.20% |  |
Senior Debt Obligations [Member] | EPO Senior Notes BBB, due January 2051 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,000 |  | 1,000
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 3.70% |  |
Senior Debt Obligations [Member] | EPO Senior Notes DDD, due February 2052 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,000 |  | 1,000
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 3.20% |  |
Senior Debt Obligations [Member] | EPO Senior Notes EEE, due February 2053 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,000 |  | 1,000
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 3.30% |  |
Senior Debt Obligations [Member] | EPO Senior Notes NN, due October 2054 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 400 |  | 400
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 4.95% |  |
Senior Debt Obligations [Member] | EPO Senior Notes CCC, due January 2060 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding |  |  |  | $ 1,000 |  | 1,000
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 3.95% |  |
Junior Debt Obligations [Member] |  |  |  |  |  |
Debt Obligations Terms: |  |  |  |  |  |
Variable rate, Interest rate terms |  |  |  | Effective July 1, 2023 and in accordance with the Adjustable Interest Rate (LIBOR) Act, all series of our junior subordinated notes subject to a variable interest rate replaced the 3-month London Interbank Offered Rate (“LIBOR”) with 3-month CME Term SOFR plus a 0.26161% tenor spread adjustment. |  |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes C, due June 2067 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding | [3],[4] |  |  | $ 232 |  | 232
Debt Obligations Terms: |  |  |  |  |  |
Variable annual interest rate thereafter, variable rate basis |  |  |  | 3-month Chicago Mercantile Exchange (“CME”) Term Secured Overnight Financing Rate (“SOFR”) plus (a) a 0.26161% tenor spread adjustment |  |
Variable interest rate |  |  |  | 2.778% |  |
Information regarding variable interest rates paid: |  |  |  |  |  |
Weighted-average interest rate paid |  |  |  | 8.40% |  |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes C, due June 2067 [Member] | Minimum [Member] |  |  |  |  |  |
Information regarding variable interest rates paid: |  |  |  |  |  |
Variable interest rates paid |  |  |  | 8.38% |  |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes C, due June 2067 [Member] | Maximum [Member] |  |  |  |  |  |
Information regarding variable interest rates paid: |  |  |  |  |  |
Variable interest rates paid |  |  |  | 8.42% |  |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes D, due August 2077 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding | [3],[5] |  |  | $ 350 |  | 350
Debt Obligations Terms: |  |  |  |  |  |
Variable annual interest rate thereafter, variable rate basis |  |  |  | 3-month CME Term SOFR plus (a) a 0.26161% tenor spread adjustment |  |
Variable interest rate |  |  |  | 2.986% |  |
Information regarding variable interest rates paid: |  |  |  |  |  |
Weighted-average interest rate paid |  |  |  | 8.61% |  |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes D, due August 2077 [Member] | Minimum [Member] |  |  |  |  |  |
Information regarding variable interest rates paid: |  |  |  |  |  |
Variable interest rates paid |  |  |  | 8.57% |  |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes D, due August 2077 [Member] | Maximum [Member] |  |  |  |  |  |
Information regarding variable interest rates paid: |  |  |  |  |  |
Variable interest rates paid |  |  |  | 8.64% |  |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes E, due August 2077 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding | [3],[6] |  |  | $ 1,000 |  | 1,000
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 5.25% |  |
Variable annual interest rate thereafter, variable rate basis |  |  |  | 3-month CME Term SOFR plus (a) a 0.26161% tenor spread adjustment |  |
Variable interest rate |  |  |  | 3.033% |  |
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes F, due February 2078 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding | [3],[7] |  |  | $ 700 |  | 700
Debt Obligations Terms: |  |  |  |  |  |
Interest rate, stated percentage |  |  |  | 5.375% |  |
Variable annual interest rate thereafter, variable rate basis |  |  |  | 3-month CME Term SOFR plus (a) a 0.26161% tenor spread adjustment |  |
Variable interest rate |  |  |  | 2.57% |  |
Junior Debt Obligations [Member] | TEPPCO Junior Subordinated Notes, due June 2067 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal outstanding | [3],[4] |  |  | $ 14 |  | $ 14
Debt Obligations Terms: |  |  |  |  |  |
Variable annual interest rate thereafter, variable rate basis |  |  |  | 3-month Chicago Mercantile Exchange (“CME”) Term Secured Overnight Financing Rate (“SOFR”) plus (a) a 0.26161% tenor spread adjustment |  |
Variable interest rate |  |  |  | 2.778% |  |
Information regarding variable interest rates paid: |  |  |  |  |  |
Weighted-average interest rate paid |  |  |  | 8.40% |  |
Junior Debt Obligations [Member] | TEPPCO Junior Subordinated Notes, due June 2067 [Member] | Minimum [Member] |  |  |  |  |  |
Information regarding variable interest rates paid: |  |  |  |  |  |
Variable interest rates paid |  |  |  | 8.38% |  |
Junior Debt Obligations [Member] | TEPPCO Junior Subordinated Notes, due June 2067 [Member] | Maximum [Member] |  |  |  |  |  |
Information regarding variable interest rates paid: |  |  |  |  |  |
Variable interest rates paid |  |  |  | 8.42% |  |
[1] | Under the terms of the agreement, EPO may borrow up to $1.5 billion (which may be increased by up to $200 million to $1.7 billion at EPO’s election provided certain conditions are met).
[2] | Under the terms of the agreement, EPO may borrow up to $2.7 billion (which may be increased by up to $500 million to $3.2 billion at EPO’s election provided certain conditions are met).
[3] | Effective July 1, 2023 and in accordance with the Adjustable Interest Rate (LIBOR) Act, all series of our junior subordinated notes subject to a variable interest rate replaced the 3-month London Interbank Offered Rate (“LIBOR”) with 3-month CME Term SOFR plus a 0.26161% tenor spread adjustment.
[4] | Variable rate is reset quarterly and based on 3-month Chicago Mercantile Exchange (“CME”) Term Secured Overnight Financing Rate (“SOFR”) plus (a) a 0.26161% tenor spread adjustment and (b) 2.778%.
[5] | Variable rate is reset quarterly and based on 3-month CME Term SOFR plus (a) a 0.26161% tenor spread adjustment and (b) 2.986%.
[6] | Fixed rate of 5.250% through August 15, 2027; thereafter, a variable rate reset quarterly and based on 3-month CME Term SOFR plus (a) a 0.26161% tenor spread adjustment and (b) 3.033%.
[7] | Fixed rate of 5.375% through February 14, 2028; thereafter, a variable rate reset quarterly and based on 3-month CME Term SOFR plus (a) a 0.26161% tenor spread adjustment and (b) 2.57%.

X
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