Debt Obligations (Details) - USD ($) $ in Millions		1 Months Ended					12 Months Ended
		Feb. 28, 2025	Dec. 31, 2024	Aug. 31, 2024	Feb. 29, 2024	Jan. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Principal outstanding			$ 32,207				$ 32,207	$ 29,021
Other, non-principal amounts			(311)				(311)	(273)
Less current maturities of debt			(1,150)				(1,150)	(1,300)
Total long-term debt			30,746				30,746	27,448
Debt Obligations Terms:
Repayment of debt obligations							50,546	89,447	$ 97,395
Letter of credit outstanding			28				28
Senior Debt Obligations [Member]
Debt Instrument [Line Items]
Principal outstanding			29,925				29,925	26,725
Senior Debt Obligations [Member] | Commercial Paper Notes [Member]
Debt Instrument [Line Items]
Principal outstanding			0				0	450
Debt Obligations Terms:
Maximum borrowing capacity			$ 3,000				$ 3,000
Information regarding variable interest rates paid:
Weighted-average interest rate paid							5.44%
Senior Debt Obligations [Member] | Commercial Paper Notes [Member] | Minimum [Member]
Information regarding variable interest rates paid:
Variable interest rates paid			4.68%				4.68%
Senior Debt Obligations [Member] | Commercial Paper Notes [Member] | Maximum [Member]
Information regarding variable interest rates paid:
Variable interest rates paid			5.50%				5.50%
Senior Debt Obligations [Member] | EPO Senior Notes JJ, due February 2024 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 0				$ 0	850
Debt Obligations Terms:
Interest rate, stated percentage			3.90%				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	1,150
Debt Obligations Terms:
Interest rate, stated percentage			3.75%				3.75%
Senior Debt Obligations [Member] | EPO Senior Notes MM, due February 2025 [Member] | Subsequent Event [Member]
Debt Obligations Terms:
Repayment of debt obligations		$ 1,150
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	0
Debt Obligations Terms:
Maximum borrowing capacity			1,500				1,500
Maximum bank commitments increase			200				200
Total maximum borrowing capacity			1,700				$ 1,700
Information regarding variable interest rates paid:
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.
Senior Debt Obligations [Member] | EPO Senior Notes FFF, due January 2026 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 750				$ 750	750
Debt Obligations Terms:
Interest rate, stated percentage			5.05%				5.05%
Senior Debt Obligations [Member] | EPO Senior Notes PP, due February 2026 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 875				$ 875	875
Debt Obligations Terms:
Interest rate, stated percentage			3.70%				3.70%
Senior Debt Obligations [Member] | EPO Senior Notes HHH, due January 2027 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,000				$ 1,000	0
Debt Obligations Terms:
Interest rate, stated percentage			4.60%				4.60%
Aggregate debt principal issued						$ 1,000
Senior Debt Obligations [Member] | EPO Senior Notes SS, due February 2027[Member]
Debt Instrument [Line Items]
Principal outstanding			$ 575				$ 575	575
Debt Obligations Terms:
Interest rate, stated percentage			3.95%				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	0
Debt Obligations Terms:
Maximum borrowing capacity			2,700				2,700
Maximum bank commitments increase			500				500
Total maximum borrowing capacity			3,200				$ 3,200
Information regarding variable interest rates paid:
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.
Senior Debt Obligations [Member] | EPO Senior Notes WW, due October 2028 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,000				$ 1,000	1,000
Debt Obligations Terms:
Interest rate, stated percentage			4.15%				4.15%
Senior Debt Obligations [Member] | EPO Senior Notes YY, due July 2029 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,250				$ 1,250	1,250
Debt Obligations Terms:
Interest rate, stated percentage			3.125%				3.125%
Senior Debt Obligations [Member] | EPO Senior Notes AAA, due January 2030 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,250				$ 1,250	1,250
Debt Obligations Terms:
Interest rate, stated percentage			2.80%				2.80%
Senior Debt Obligations [Member] | EPO Senior Notes GGG, due January 2033 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,000				$ 1,000	1,000
Debt Obligations Terms:
Interest rate, stated percentage			5.35%				5.35%
Senior Debt Obligations [Member] | EPO Senior Notes D, due March 2033 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 500				$ 500	500
Debt Obligations Terms:
Interest rate, stated percentage			6.875%				6.875%
Senior Debt Obligations [Member] | EPO Senior Notes III, due January 2034 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,000				$ 1,000	0
Debt Obligations Terms:
Interest rate, stated percentage			4.85%				4.85%
Aggregate debt principal issued						1,000
Senior Debt Obligations [Member] | EPO Senior Notes H, due October 2034 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 350				$ 350	350
Debt Obligations Terms:
Interest rate, stated percentage			6.65%				6.65%
Senior Debt Obligations [Member] | EPO Senior Notes JJJ, due February 2035 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,100				$ 1,100	0
Debt Obligations Terms:
Interest rate, stated percentage			4.95%				4.95%
Aggregate debt principal issued				$ 1,100
Senior Debt Obligations [Member] | EPO Senior Notes J, due March 2035 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 250				$ 250	250
Debt Obligations Terms:
Interest rate, stated percentage			5.75%				5.75%
Senior Debt Obligations [Member] | EPO Senior Notes W, due April 2038 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 400				$ 400	400
Debt Obligations Terms:
Interest rate, stated percentage			7.55%				7.55%
Senior Debt Obligations [Member] | EPO Senior Notes R, due October 2039 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 600				$ 600	600
Debt Obligations Terms:
Interest rate, stated percentage			6.125%				6.125%
Senior Debt Obligations [Member] | EPO Senior Notes Z, due September 2040 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 600				$ 600	600
Debt Obligations Terms:
Interest rate, stated percentage			6.45%				6.45%
Senior Debt Obligations [Member] | EPO Senior Notes BB, due February 2041 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 750				$ 750	750
Debt Obligations Terms:
Interest rate, stated percentage			5.95%				5.95%
Senior Debt Obligations [Member] | EPO Senior Notes DD, due February 2042 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 600				$ 600	600
Debt Obligations Terms:
Interest rate, stated percentage			5.70%				5.70%
Senior Debt Obligations [Member] | EPO Senior Notes EE, due August 2042 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 750				$ 750	750
Debt Obligations Terms:
Interest rate, stated percentage			4.85%				4.85%
Senior Debt Obligations [Member] | EPO Senior Notes GG, due February 2043 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,100				$ 1,100	1,100
Debt Obligations Terms:
Interest rate, stated percentage			4.45%				4.45%
Senior Debt Obligations [Member] | EPO Senior Notes II, due March 2044 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,400				$ 1,400	1,400
Debt Obligations Terms:
Interest rate, stated percentage			4.85%				4.85%
Senior Debt Obligations [Member] | EPO Senior Notes KK, due February 2045 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,150				$ 1,150	1,150
Debt Obligations Terms:
Interest rate, stated percentage			5.10%				5.10%
Senior Debt Obligations [Member] | EPO Senior Notes QQ, due May 2046 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 975				$ 975	975
Debt Obligations Terms:
Interest rate, stated percentage			4.90%				4.90%
Senior Debt Obligations [Member] | EPO Senior Notes UU, due February 2048 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,250				$ 1,250	1,250
Debt Obligations Terms:
Interest rate, stated percentage			4.25%				4.25%
Senior Debt Obligations [Member] | EPO Senior Notes XX, due February 2049 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,250				$ 1,250	1,250
Debt Obligations Terms:
Interest rate, stated percentage			4.80%				4.80%
Senior Debt Obligations [Member] | EPO Senior Notes ZZ, due January 2050 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,250				$ 1,250	1,250
Debt Obligations Terms:
Interest rate, stated percentage			4.20%				4.20%
Senior Debt Obligations [Member] | EPO Senior Notes BBB, due January 2051 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,000				$ 1,000	1,000
Debt Obligations Terms:
Interest rate, stated percentage			3.70%				3.70%
Senior Debt Obligations [Member] | EPO Senior Notes DDD, due February 2052 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,000				$ 1,000	1,000
Debt Obligations Terms:
Interest rate, stated percentage			3.20%				3.20%
Senior Debt Obligations [Member] | EPO Senior Notes EEE, due February 2053 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,000				$ 1,000	1,000
Debt Obligations Terms:
Interest rate, stated percentage			3.30%				3.30%
Senior Debt Obligations [Member] | EPO Senior Notes NN, due October 2054 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 400				$ 400	400
Debt Obligations Terms:
Interest rate, stated percentage			4.95%				4.95%
Senior Debt Obligations [Member] | EPO Senior Notes KKK, due February 2055 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,400				$ 1,400	0
Debt Obligations Terms:
Interest rate, stated percentage			5.55%				5.55%
Aggregate debt principal issued				1,400
Senior Debt Obligations [Member] | EPO Senior Notes CCC, due January 2060 [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 1,000				$ 1,000	1,000
Debt Obligations Terms:
Interest rate, stated percentage			3.95%				3.95%
Junior Debt Obligations [Member]
Debt Obligations Terms:
Variable rate, Interest rate terms							Effective July 1, 2023, 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	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							8.23%
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			7.51%				7.51%
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%				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	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							8.42%
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			7.73%				7.73%
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%				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	1,000
Debt Obligations Terms:
Interest rate, stated percentage			5.25%				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	700
Debt Obligations Terms:
Interest rate, stated percentage			5.375%				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],[8]		$ 0				$ 0	14
Debt Obligations Terms:
Repayment of debt obligations			$ 14
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							8.23%
Junior Debt Obligations [Member] | TEPPCO Junior Subordinated Notes, due June 2067 [Member] | Minimum [Member]
Information regarding variable interest rates paid:
Variable interest rates paid			7.51%				7.51%
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%				8.42%
Senior Notes [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 29,925				$ 29,925
Debt Obligations Terms:
Aggregate debt principal issued				$ 2,500		$ 2,000	$ 4,500	$ 1,750

[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, 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%.

[8] In December 2024, an affiliate of Enterprise redeemed all of the $14 million outstanding principal amount of TEPPCO Junior Subordinated Notes at par (i.e. at a redemption price equal to the outstanding principal amount of such notes to be redeemed, plus accrued and unpaid interest thereon) using cash on hand.