Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions		12 Months Ended
	Nov. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Feb. 14, 2023
Finite-Lived Intangible Assets [Line Items]
Goodwill		$ 466	$ 463	$ 0
Finite-Lived Intangible Assets, Gross		10,512	10,510
Finite-Lived Intangible Assets, Accumulated Amortization		(3,769)	(3,380)
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		10,239	10,237
Finite-Lived Intangible Assets, Accumulated Amortization		$ (3,523)	(3,155)
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		30 years
Amortization of Intangible Assets		$ 368	360	353
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		368
Finite-Lived Intangible Assets, Amortization Expense, Year Two		364
Finite-Lived Intangible Assets, Amortization Expense, Year Three		360
Finite-Lived Intangible Assets, Amortization Expense, Year Four		360
Finite-Lived Intangible Assets, Amortization Expense, Year Five		360
Transportation and Storage Capacity [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		267	267
Finite-Lived Intangible Assets, Accumulated Amortization		(244)	(223)
Amortization of Intangible Assets		21	51	158
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		10
Finite-Lived Intangible Assets, Amortization Expense, Year Two		7
Finite-Lived Intangible Assets, Amortization Expense, Year Three		4
Finite-Lived Intangible Assets, Amortization Expense, Year Four		2
Finite-Lived Intangible Assets, Amortization Expense, Year Five		0
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		6	6
Finite-Lived Intangible Assets, Accumulated Amortization		(2)	(2)
MountainWest Acquisition
Finite-Lived Intangible Assets [Line Items]
Goodwill, Period Increase (Decrease)			400
Cureton Acquisition
Finite-Lived Intangible Assets [Line Items]
Goodwill, Period Increase (Decrease)		5	6
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	20 years
RMM Acquisition
Finite-Lived Intangible Assets [Line Items]
Goodwill, Period Increase (Decrease)		(2)	57
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	20 years
Transmission And Gulf Of America [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill		400	400	0
Transmission And Gulf Of America [Member] | MountainWest Acquisition
Finite-Lived Intangible Assets [Line Items]
Goodwill					$ 400
Goodwill, Period Increase (Decrease)			400
West [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill		66	63	$ 0
West [Member] | Cureton Acquisition
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 11
Goodwill, Period Increase (Decrease)		5	6
West [Member] | RMM Acquisition
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 55
Goodwill, Period Increase (Decrease)		$ (2)	$ 57