Segment Disclosures (Tables)

3 Months Ended

Mar. 31, 2025

Segment Reporting [Abstract]

Reconciliation of revenue from segment to consolidated [Table Text Block]

The following tables present revenues, Modified EBITDA, significant expenses, and certain segment assets measures, as well as reconciliations to the consolidated totals for Modified EBITDA:

	Transmission & Gulf of America		Northeast G&P		West		Gas & NGL Marketing Services (1)		Total
	(Millions)
Three Months Ended March 31, 2025
Segment revenues:
Service revenues
External	$	1,113	$	493	$	393	$	—	$	1,999
Internal	22		4		45		—		71
Total service revenues	1,135		497		438		—		2,070
Total service revenues – commodity consideration	23		1		25		—		49
Product sales
External	26		18		40		932		1,016
Internal	89		39		224		(193)		159
Total product sales	115		57		264		739		1,175
Net gain (loss) from commodity derivatives
Realized	(1)		—		(2)		(35)		(38)
Unrealized	—		—		—		7		7
Total net gain (loss) from commodity derivatives (2)	(1)		—		(2)		(28)		(31)
Total revenues of reportable segments	$	1,272	$	555	$	725	$	711	$	3,263
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses	(123)		(52)		(254)		(513)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses	—		—		—		(10)
Operating and administrative expenses (3)	(270)		(106)		(152)		(39)
Recoverable power, transportation, and storage costs (4)	(70)		(42)		(14)		—
Other segment income (expenses) - net (5)	13		—		11		—
Proportional Modified EBITDA of equity-method investments	36		159		38		3
Modified EBITDA of reportable segments	$	858	$	514	$	354	$	152	$	1,878
Modified EBITDA from upstream operations, corporate, and other business activities									75
Total consolidated Modified EBITDA									$	1,953
Reconciliation of Modified EBITDA:
Depreciation, depletion, and amortization expenses									$	(585)
Equity earnings (losses)									155
Other investing income (loss) - net									8
Interest expense									(349)
Accretion expense associated with AROs for nonregulated operations									(24)
Proportional Modified EBITDA of equity-method investments									(236)
Income (loss) before income taxes									$	922
Additions to long-lived segment assets	$	302	$	59	$	557	$	—	$	918

	Transmission & Gulf of America		Northeast G&P		West		Gas & NGL Marketing Services (1)		Total
	(Millions)
Three Months Ended March 31, 2024
Segment revenues:
Service revenues
External	$	1,029	$	475	$	397	$	—	$	1,901
Internal	20		4		40		—		64
Total service revenues	1,049		479		437		—		1,965
Total service revenues – commodity consideration	9		5		16		—		30
Product sales
External	30		2		72		707		811
Internal	31		23		176		(120)		110
Total product sales	61		25		248		587		921
Net gain (loss) from commodity derivatives
Realized	—		—		—		81		81
Unrealized	—		—		—		(98)		(98)
Total net gain (loss) from commodity derivatives (2)	—		—		—		(17)		(17)
Total revenues of reportable segments	$	1,119	$	509	$	701	$	570	$	2,899
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses	(61)		(19)		(249)		(432)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses	—		—		—		3
Operating and administrative expenses (3)	(255)		(108)		(139)		(40)
Recoverable power, transportation, and storage costs (4)	(64)		(34)		(11)		—
Other segment income (expenses) - net (5)	44		(1)		—		—
Proportional Modified EBITDA of equity-method investments	46		157		25		—
Modified EBITDA of reportable segments	$	829	$	504	$	327	$	101	$	1,761
Modified EBITDA from upstream operations, corporate, and other business activities									76
Total consolidated Modified EBITDA									$	1,837
Reconciliation of Modified EBITDA:
Depreciation, depletion, and amortization expenses									$	(548)
Equity earnings (losses)									137
Other investing income (loss) - net									24
Interest expense									(349)
Accretion expense associated with AROs for nonregulated operations									(18)
Proportional Modified EBITDA of equity-method investments									(228)
Income (loss) before income taxes									$	855
Additions to long-lived segment assets	$	2,487	$	64	$	91	$	—	$	2,642
As of March 31, 2025
Equity-method investments by reportable segment	$	271	$	3,367	$	463	$	153	$	4,254
Segment assets	$	23,275	$	12,878	$	12,533	$	193	$	48,879
As of December 31, 2024
Equity-method investments by reportable segment	$	272	$	3,346	$	476	$	—	$	4,094
Segment assets	$	23,149	$	12,918	$	12,144	$	46	$	48,257

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(1)    As Williams is acting as agent for natural gas marketing customers or engages in energy trading activities, the resulting revenues are presented net of the related costs of those activities.

(2)    Williams records transactions that qualify as commodity derivatives at fair value with changes in fair value recognized in earnings in the period of change and characterized as unrealized gains or losses. Gains and losses from commodity derivatives held for energy trading purposes are presented on a net basis in revenue.

(3)     Segment operating and administrative expenses primarily include payroll, maintenance and operating costs and taxes, and general and administrative expenses, including acquisition and transition-related expenses. It also includes project execution, information technology, finance and accounting, real estate and aviation, central engineering services, safety and operational discipline, supply chain and digital transformation, corporate strategic development, human resources, legal and government affairs, and executive and audit support services costs which are centrally managed and allocated to segments.

(4)     Recoverable power, transportation and storage costs are charges incurred which are reimbursable pursuant to FERC stipulations or customer contracts.

(5)    Other segment income (expenses) primarily includes equity AFUDC and regulatory credits and charges related to Williams’ regulated operations.