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Segment Disclosures
 9 Months Ended
Sep. 30, 2025
Segment Reporting [Abstract]  
Segment Disclosures [Text Block]
Note 11 – Segment Disclosures
Williams
Williams’ reportable segments are Transmission, Power & Gulf, Northeast G&P, West, and Gas & NGL Marketing Services. All remaining business activities are included in Other. (See Note 1 – General, Description of Business, and Basis of Presentation.)
Performance Measurement
Williams’ CODM is the Chief Executive Officer. Williams’ CODM primarily utilizes Modified EBITDA, its measure of segment profit and loss, to evaluate performance and make decisions on capital allocation and human resources. Such evaluation includes periodic comparisons of actual performance versus historical and budget, as well as projections of Modified EBITDA.
Williams defines Modified EBITDA of reportable segments as follows:
•Income (loss) before income taxes excluding:
◦Contributions from upstream operations, corporate, and other business activities;
◦Depreciation, depletion, and amortization expenses;
◦Equity earnings (losses);
◦Other investing income (loss) – net;
◦Interest expense; and
◦Accretion expense associated with AROs for nonregulated operations.
•This measure is further adjusted to include Williams’ proportionate share (based on ownership interest) of Modified EBITDA from its equity-method investments, including its indirect share from interests owned by equity-method investees, calculated consistently with the definition described above.
Significant noncash items which are components of Modified EBITDA may include net unrealized gain (loss) from commodity derivatives within Total revenues, net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses for Williams’ Gas & NGL Marketing Services segment, charges associated with lower of cost or net realizable value adjustments to the Gas & NGL Marketing Services segment inventory within Product sales (for natural gas marketing inventory as these sales are presented net of the related costs) and Product costs (for NGL marketing inventory), and impairments or write-offs of certain assets within Other (income) expense – net within Operating income (loss).
Intersegment Service revenues primarily represent transportation services provided to Williams’ marketing business and gathering services provided to its upstream oil and gas properties. Intersegment Product sales primarily represent the sale of natural gas and NGLs from Williams’ natural gas processing plants and its oil and gas properties to its marketing business.
Segment assets include Investments, Property, plant, and equipment – net, and Intangible assets – net.
The following tables present revenues, Modified EBITDA, significant expenses, and certain segment assets measures:
Transmission, Power & GulfNortheast G&PWest
Gas & NGL Marketing Services (1)
Total
(Millions)
Three Months Ended September 30, 2025
Segment revenues:
Service revenues
External$1,213 $495 $409 $— $2,117 
Internal24 4 61 — 89 
Total service revenues1,237 499 470 — 2,206 
Total service revenues – commodity consideration24 — 21 — 45 
Product sales
External42 7 38 576 663 
Internal88 24 181 (161)132 
Total product sales130 31 219 415 795 
Net gain (loss) from commodity derivatives
Realized1 — 2 (11)(8)
Unrealized— — — 44 44 
Total net gain (loss) from commodity derivatives (2)1 — 2 33 36 
Total revenues of reportable segments
$1,392 $530 $712 $448 $3,082 
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses(139)(25)(211)(398)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses— — — 2 
Operating and administrative expenses (3)(290)(114)(150)(14)
Recoverable power, transportation, and storage costs (4)(64)(42)(17)— 
Other segment income (expenses) - net (5)37 (5)(28)— 
Proportional Modified EBITDA of equity-method investments37 161 36 16 
Total Modified EBITDA of reportable segments$973 $505 $342 $54 $1,874 
Reconciliation of Modified EBITDA:
Contribution from upstream operations, corporate, and other business activities93 
Depreciation, depletion, and amortization expenses(564)
Equity earnings (losses)152 
Other investing income (loss) - net19 
Interest expense(372)
Accretion expense associated with AROs for nonregulated operations
(23)
Proportional Modified EBITDA of equity-method investments(250)
Income (loss) before income taxes$929 
Additions to long-lived segment assets
$754 $53 $167 $— $974 
Transmission, Power & GulfNortheast G&PWest
Gas & NGL Marketing Services (1)
Total
(Millions)
Three Months Ended September 30, 2024
Segment revenues:
Service revenues
External$1,049 $473 $385 $— $1,907 
Internal23 2 41 — 66 
Total service revenues1,072 475 426 — 1,973 
Total service revenues – commodity consideration14 1 19 — 34 
Product sales
External30 8 47 585 670 
Internal54 18 171 (104)139 
Total product sales84 26 218 481 809 
Net gain (loss) from commodity derivatives
Realized— — — (8)(8)
Unrealized— — — 9 9 
Total net gain (loss) from commodity derivatives (2)— — — 1 1 
Total revenues of reportable segments$1,170 $502 $663 $482 $2,817 
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses(87)(19)(210)(450)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses— — — 1 
Operating and administrative expenses (3)(294)(120)(157)(22)
Recoverable power, transportation, and storage costs (4)(65)(35)(13)— 
Other segment income (expenses) - net (5)46 (1)5 — 
Proportional Modified EBITDA of equity-method investments41 149 35 — 
Total Modified EBITDA of reportable segments$811 $476 $323 $11 $1,621 
Reconciliation of Modified EBITDA:
Contribution from upstream operations, corporate, and other business activities58 
Depreciation, depletion, and amortization expenses(566)
Equity earnings (losses)147 
Other investing income (loss) - net290 
Interest expense(338)
Accretion expense associated with AROs for nonregulated operations
(17)
Proportional Modified EBITDA of equity-method investments(227)
Income (loss) before income taxes$968 
Additions to long-lived segment assets
$761 $56 $126 $1 $944 
Transmission, Power & GulfNortheast G&PWest
Gas & NGL Marketing Services (1)
Total
(Millions)
Nine Months Ended September 30, 2025
Segment revenues:
Service revenues
External$3,476 $1,482 $1,195 $— $6,153 
Internal72 11 159 — 242 
Total service revenues3,548 1,493 1,354 — 6,395 
Total service revenues – commodity consideration75 1 65 — 141 
Product sales
External99 42 109 2,037 2,287 
Internal254 90 584 (480)448 
Total product sales353 132 693 1,557 2,735 
Net gain (loss) from commodity derivatives
Realized— — 1 (44)(43)
Unrealized— — — 35 35 
Total net gain (loss) from commodity derivatives (2)— — 1 (9)(8)
Total revenues of reportable segments$3,976 $1,626 $2,113 $1,548 $9,263 
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses(381)(115)(666)(1,332)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses— — — 4 
Operating and administrative expenses (3)(846)(333)(452)(72)
Recoverable power, transportation, and storage costs (4)(189)(125)(46)— 
Other segment income (expenses) - net (5)52 (7)(18)1 
Proportional Modified EBITDA of equity-method investments110 474 106 27 
Total Modified EBITDA of reportable segments
$2,722 $1,520 $1,037 $176 $5,455 
Reconciliation of Modified EBITDA:
Contribution from upstream operations, corporate, and other business activities
286 
Depreciation, depletion, and amortization expenses(1,754)
Equity earnings (losses)449 
Other investing income (loss) - net31 
Interest expense(1,071)
Accretion expense associated with AROs for nonregulated operations
(71)
Proportional Modified EBITDA of equity-method investments(717)
Income (loss) before income taxes$2,608 
Additions to long-lived segment assets$1,781 $166 $962 $1 $2,910 
Transmission, Power & GulfNortheast G&PWest
Gas & NGL Marketing Services (1)
Total
(Millions)
Nine Months Ended September 30, 2024
Segment revenues:
Service revenues
External$3,077 $1,410 $1,154 $— $5,641 
Internal67 9 116 — 192 
Total service revenues3,144 1,419 1,270 — 5,833 
Total service revenues – commodity consideration28 1 53 — 82 
Product sales
External85 15 153 1,800 2,053 
Internal100 59 504 (309)354 
Total product sales185 74 657 1,491 2,407 
Net gain (loss) from commodity derivatives
Realized— — 5 40 45 
Unrealized— — — (188)(188)
Total net gain (loss) from commodity derivatives (2)— — 5 (148)(143)
Total revenues of reportable segments
$3,357 $1,494 $1,985 $1,343 $8,179 
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses(188)(56)(636)(1,269)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses— — — (3)
Operating and administrative expenses (3)
(809)(336)(444)(85)
Recoverable power, transportation, and storage costs (4)
(191)(101)(36)— 
Other segment income (expenses) - net (5)
143 1 3 — 
Proportional Modified EBITDA of equity-method investments136 459 96 — 
Total Modified EBITDA of reportable segments
$2,448 $1,461 $968 $(14)$4,863 
Reconciliation of Modified EBITDA:
Contribution from upstream operations, corporate, and other business activities
181 
Depreciation, depletion, and amortization expenses
(1,654)
Equity earnings (losses)431 
Other investing income (loss) - net332 
Interest expense(1,026)
Accretion expense associated with AROs for nonregulated operations
(56)
Proportional Modified EBITDA of equity-method investments(693)
Income (loss) before income taxes
$2,378 
Additions to long-lived segment assets
$3,763 $163 $288 $1 $4,215 
As of September 30, 2025
Equity-method investments by reportable segment$262 $3,255 $460 $153 $4,130 
Segment assets$24,329 $12,631 $12,735 $183 $49,878 
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 
_______________________
(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, as well as the write-off of certain compression assets in the West segment in the third quarter of 2025 (Note 8 – Fair Value Measurements and Guarantees).
Transco
Transco manages and evaluates its business as a single reportable segment. Transco’s CODM is the Senior Vice President, Transmission, Power & Gulf. Transco’s CODM determines resource allocation, measures and evaluates segment operating performance based upon Net income (loss) as reported on the Statement of Net Income.
Significant expenses within net income include Operating and maintenance expenses and Selling, general, and administrative expenses, which are each separately presented on Transco’s Statement of Net Income. Other segment items within net income include natural gas product costs, depreciation and amortization expenses, taxes, other than income taxes, interest expense, interest income, other income (expense) – net, and AFUDC.
Transco’s segment assets include Property, plant, and equipment – net as presented on the Balance Sheet.
NWP
NWP manages and evaluates its business as a single reportable segment. NWP’s CODM is the Senior Vice President, Transmission, Power & Gulf. NWP’s CODM determines resource allocation, measures and evaluates segment operating performance based upon Net income (loss) as reported on the Statement of Net Income.
Significant expenses within net income include Operating and maintenance expenses and Selling, general, and administrative expenses, which are each separately presented on NWP’s Statement of Net Income. Other segment items within net income include depreciation and amortization expenses, taxes, other than income taxes, interest expense, other income (expense) – net, and AFUDC.
NWP’s segment assets include Property, plant, and equipment – net as presented on the Balance Sheet.