Debt Obligations (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Principal outstanding		$ 31,887	$ 32,207
Other, non-principal amounts		(307)	(311)
Less current maturities of debt		(2,453)	(1,150)
Total long-term debt		29,127	30,746
Debt Obligations Terms:
Letters of credit outstanding		28
Senior Debt Obligations [Member]
Debt Instrument [Line Items]
Principal outstanding		29,605	29,925
Senior Debt Obligations [Member] | Commercial Paper Notes [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 830	0
Information regarding variable interest rates paid:
Weighted-average interest rate paid		4.54%
Senior Debt Obligations [Member] | Commercial Paper Notes [Member] | Minimum [Member]
Information regarding variable interest rates paid:
Variable interest rates paid		4.50%
Senior Debt Obligations [Member] | Commercial Paper Notes [Member] | Maximum [Member]
Information regarding variable interest rates paid:
Variable interest rates paid		4.65%
Senior Debt Obligations [Member] | EPO Senior Notes MM, due February 2025 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 0	1,150
Debt Obligations Terms:
Interest rate, stated percentage		3.75%
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] | March 2025 $1.5 Billion EPO 364-Day Revolving Credit Agreement, due March 2026 [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 HHH, due January 2027 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 1,000	1,000
Debt Obligations Terms:
Interest rate, stated percentage		4.60%
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] | 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] | March 2023 $2.7 Billion EPO Multi-Year Revolving Credit Agreement, due March 2030 [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 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	1,000
Debt Obligations Terms:
Interest rate, stated percentage		4.85%
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 JJJ, due February 2035 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 1,100	1,100
Debt Obligations Terms:
Interest rate, stated percentage		4.95%
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 KKK, due February 2055 [Member]
Debt Instrument [Line Items]
Principal outstanding		$ 1,400	1,400
Debt Obligations Terms:
Interest rate, stated percentage		5.55%
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] | EPO Junior Subordinated Notes C, due June 2067 [Member]
Debt Instrument [Line Items]
Principal outstanding	[3]	$ 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		7.45%
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		7.36%
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		7.51%
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes D, due August 2077 [Member]
Debt Instrument [Line Items]
Principal outstanding	[4]	$ 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		7.65%
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		7.57%
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		7.73%
Junior Debt Obligations [Member] | EPO Junior Subordinated Notes E, due August 2077 [Member]
Debt Instrument [Line Items]
Principal outstanding	[5]	$ 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	[6]	$ 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%

[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] 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%.

[4] 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%.

[5] 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%.

[6] 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%.