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Revenue Recognition (Tables)
 12 Months Ended
Dec. 31, 2024
Revenue Recognition [Abstract]  
Disaggregation of Revenue [Table Text Block]
The following table presents Williams’ revenue disaggregated by major service line:
Transmission & Gulf of AmericaNortheast G&PWestGas & NGL Marketing ServicesOtherEliminationsTotal
(Millions)
2024
Revenues from contracts with customers:
Service revenues:
Regulated interstate natural gas transportation and storage$3,500 $— $— $— $— $(81)$3,419 
Gathering, processing, transportation, fractionation, and storage:
Monetary consideration661 1,778 1,693 — — (162)3,970 
Commodity consideration54 2 78 — — — 134 
Other46 92 21 — — (19)140 
Total service revenues4,261 1,872 1,792 — — (262)7,663 
Product sales328 110 869 4,530 420 (1,288)4,969 
Total revenues from contracts with customers4,589 1,982 2,661 4,530 420 (1,550)12,632 
Other revenues (1)39 43 8 2,236 24 (2)2,348 
Other adjustments (2)— — — (4,977)— 500 (4,477)
Total revenues$4,628 $2,025 $2,669 $1,789 $444 $(1,052)$10,503 
2023
Revenues from contracts with customers:
Service revenues:
Regulated interstate natural gas transportation and storage$3,334 $— $— $— $— $(60)$3,274 
Gathering, processing, transportation, fractionation, and storage:
Monetary consideration
443 1,782 1,478 — — (170)3,533 
Commodity consideration38 5 103 — — — 146 
Other
30 87 12 1 — (15)115 
Total service revenues3,845 1,874 1,593 1 — (245)7,068 
Product sales252 132 441 4,615 442 (954)4,928 
Total revenues from contracts with customers4,097 2,006 2,034 4,616 442 (1,199)11,996 
Other revenues (1)53 27 101 4,294 64 (2)4,537 
Other adjustments (2)— — — (6,032)— 406 (5,626)
Total revenues$4,150 $2,033 $2,135 $2,878 $506 $(795)$10,907 
Transmission & Gulf of AmericaNortheast G&PWestGas & NGL Marketing ServicesOtherEliminationsTotal
(Millions)
2022
Revenues from contracts with customers:
Service revenues:
Regulated interstate natural gas transportation and storage$3,139 $— $— $— $— $(72)$3,067 
Gathering, processing, transportation, fractionation, and storage:
Monetary consideration
381 1,526 1,518 — — (167)3,258 
Commodity consideration64 14 182 — — — 260 
Other
21 102 12 3 — (16)122 
Total service revenues3,605 1,642 1,712 3 — (255)6,707 
Product sales404 134 841 10,768 706 (1,787)11,066 
Total revenues from contracts with customers4,009 1,776 2,553 10,771 706 (2,042)17,773 
Other revenues (1)38 26 8 7,929 (55)(11)7,935 
Other adjustments (2)— — — (15,467)— 724 (14,743)
Total revenues$4,047 $1,802 $2,561 $3,233 $651 $(1,329)$10,965 
______________________________
(1)Revenues not derived from contracts with customers primarily consist of physical product sales related to commodity derivative contracts, realized and unrealized gains and losses associated with Williams’ commodity derivative contracts, which are reported in Net gain (loss) from commodity derivatives in the Consolidated Statement of Income, management fees received for certain services provided to operated equity-method investments, and leasing revenues associated with the Williams headquarters building.
(2)Other adjustments reflect certain costs of Gas & NGL Marketing Services’ risk management activities. 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 in the Consolidated Statement of Income.
Contract with Customer, Asset and Liability [Table Text Block]
The following tables present a reconciliation of contract assets:
Williams
Year Ended December 31,
20242023
(Millions)
Balance at beginning of year$36 $29 
Revenue recognized in excess of amounts invoiced170 183 
Minimum volume commitments invoiced(144)(176)
Contract assets acquired36 — 
Balance at end of year$98 $36 
Transco
Year Ended December 31,
20242023
(Millions)
Balance at beginning of year$— $— 
Revenue recognized in excess of amounts invoiced10 — 
Balance at end of year$10 $— 

NWP
Year Ended December 31,
20242023
(Millions)
Balance at beginning of year$17 $13 
Revenue recognized in excess of amounts invoiced6 6 
Amortization of contract assets(2)(2)
Balance at end of year$21 $17 

Contract Liabilities
The following tables present a reconciliation of contract liabilities:
Williams
Year Ended December 31,
20242023
(Millions)
Balance at beginning of year$1,081 $1,043 
Payments received and deferred183 190 
Significant financing component8 9 
Contract liability acquired (disposed) – net53 115 
Recognized in revenue(279)(276)
Balance at end of year$1,046 $1,081 
Transco
Year Ended December 31,
20242023
(Millions)
Balance at beginning of year$184 $194 
Recognized in revenue(11)(10)
Balance at end of year$173 $184 
NWP
Year Ended December 31,
20242023
(Millions)
Balance at beginning of year$2 $3 
Recognized in revenue(2)(1)
Balance at end of year$— $2 
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]
The following tables present the amount of the contract liabilities balance expected to be recognized as revenue when performance obligations are satisfied and the transaction price allocated to the remaining performance obligations under certain contracts as of December 31, 2024.

Williams
Contract LiabilitiesRemaining Performance Obligations
(Millions)
2025 (one year)
$173 $4,132 
2026 (one year)
146 3,860 
2027 (one year)
141 3,623 
2028 (one year)
118 2,778 
2029 (one year)
100 2,564 
Thereafter
368 14,102 
   Total$1,046 $31,059 
Transco
Contract LiabilitiesRemaining Performance Obligations
(Millions)
2025 (one year)
$10 $2,726 
2026 (one year)
10 2,536 
2027 (one year)
11 2,438 
2028 (one year)
11 1,784 
2029 (one year)
11 1,693 
Thereafter
120 10,421 
   Total$173 $21,598 

NWP
Contract LiabilitiesRemaining Performance Obligations
(Millions)
2025 (one year)
$— $391 
2026 (one year)
— 386 
2027 (one year)
— 373 
2028 (one year)
— 368 
2029 (one year)
— 349 
Thereafter
— 2,234 
   Total$— $4,101