Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

Changes in the carrying amount of goodwill, included in Intangible assets – net of accumulated amortization in Williams’ Consolidated Balance Sheet, by reportable segment for the years indicated are as follows:

	Transmission & Gulf of America		West		Total
	(Millions)
December 31, 2022	$	—	$	—	$	—
MountainWest Acquisition (Note 3)	400		—		400
Cureton Acquisition (Note 3)	—		6		6
RMM Acquisition (Note 3)	—		57		57
December 31, 2023	400		63		463
Cureton Acquisition (Note 3)	—		5		5
RMM Acquisition (Note 3)	—		(2)		(2)
December 31, 2024	$	400	$	66	$	466

Schedule of Finite-Lived Intangible Assets [Table Text Block]

The gross carrying amount and accumulated amortization of other intangible assets, included in Intangible assets – net of accumulated amortization in Williams’ Consolidated Balance Sheet, at December 31 are as follows:

	2024				2023
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
	(Millions)
Customer relationships	$	10,239	$	(3,523)	$	10,237	$	(3,155)
Transportation and storage capacity contracts	267		(244)		267		(223)
Other	6		(2)		6		(2)
Other intangible assets	$	10,512	$	(3,769)	$	10,510	$	(3,380)