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Revenue Recognition (Tables) | 6 Months Ended
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Jun. 30, 2025
Revenue Recognition [Abstract] |
Disaggregation of Revenue [Table Text Block] | The following tables present Williams’ revenue disaggregated by major service line:
| Transmission & Gulf of America |  | Northeast G&P |  | West |  | Gas & NGL Marketing Services |  | Other |  | Eliminations |  | Total
| (Millions)
Three Months Ended June 30, 2025 |  |
Revenues from contracts with customers: |  |  |  |  |  |  |  |  |  |  |  |  |
Service revenues: |  |  |  |  |  |  |  |  |  |  |  |  |
Regulated interstate natural gas transportation and storage | $ | 927 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (21) |  |  | $ | 906 |
Gathering, processing, transportation, fractionation, and storage: |  |  |  |  |  |  |  |  |  |  |  |  |
Monetary consideration | 226 |  |  | 460 |  |  | 441 |  |  | — |  |  | — |  |  | (55) |  |  | 1,072 |
Commodity consideration | 28 |  |  | — |  |  | 19 |  |  | — |  |  | — |  |  | — |  |  | 47 |
Other | 13 |  |  | 25 |  |  | 5 |  |  | — |  |  | — |  |  | (5) |  |  | 38 |
Total service revenues | 1,194 |  |  | 485 |  |  | 465 |  |  | — |  |  | — |  |  | (81) |  |  | 2,063 |
Product sales | 108 |  |  | 44 |  |  | 210 |  |  | 1,213 |  |  | 137 |  |  | (397) |  |  | 1,315 |
Total revenues from contracts with customers | 1,302 |  |  | 529 |  |  | 675 |  |  | 1,213 |  |  | 137 |  |  | (478) |  |  | 3,378 |
Other revenues (1) | 10 |  |  | 12 |  |  | 1 |  |  | 596 |  |  | 53 |  |  | (1) |  |  | 671 |
Other adjustments (2) | — |  |  | — |  |  | — |  |  | (1,420) |  |  | — |  |  | 152 |  |  | (1,268) |
Total revenues | $ | 1,312 |  |  | $ | 541 |  |  | $ | 676 |  |  | $ | 389 |  |  | $ | 190 |  |  | $ | (327) |  |  | $ | 2,781 |
Three Months Ended June 30, 2024 |  |
Revenues from contracts with customers: |  |  |  |  |  |  |  |  |  |  |  |  |
Service revenues: |  |  |  |  |  |  |  |  |  |  |  |  |
Regulated interstate natural gas transportation and storage | $ | 846 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (20) |  |  | $ | 826 |
Gathering, processing, transportation, fractionation, and storage: |  |  |  |  |  |  |  |  |  |  |  |  |
Monetary consideration | 158 |  |  | 431 |  |  | 401 |  |  | — |  |  | — |  |  | (37) |  |  | 953 |
Commodity consideration | 5 |  |  | (5) |  |  | 18 |  |  | — |  |  | — |  |  | — |  |  | 18 |
Other | 11 |  |  | 23 |  |  | 5 |  |  | — |  |  | — |  |  | (4) |  |  | 35 |
Total service revenues | 1,020 |  |  | 449 |  |  | 424 |  |  | — |  |  | — |  |  | (61) |  |  | 1,832 |
Product sales | 40 |  |  | 23 |  |  | 191 |  |  | 922 |  |  | 86 |  |  | (247) |  |  | 1,015 |
Total revenues from contracts with customers | 1,060 |  |  | 472 |  |  | 615 |  |  | 922 |  |  | 86 |  |  | (308) |  |  | 2,847 |
Other revenues (1) | 8 |  |  | 11 |  |  | 6 |  |  | 337 |  |  | 2 |  |  | (1) |  |  | 363 |
Other adjustments (2) | — |  |  | — |  |  | — |  |  | (968) |  |  | — |  |  | 94 |  |  | (874) |
Total revenues | $ | 1,068 |  |  | $ | 483 |  |  | $ | 621 |  |  | $ | 291 |  |  | $ | 88 |  |  | $ | (215) |  |  | $ | 2,336 |
| Transmission & Gulf of America |  | Northeast G&P |  | West |  | Gas & NGL Marketing Services |  | Other |  | Eliminations |  | Total
| (Millions)
Six Months Ended June 30, 2025 |  |
Revenues from contracts with customers: |  |  |  |  |  |  |  |  |  |  |  |
Service revenues: |  |  |  |  |  |  |  |  |  |  |  |  |
Regulated interstate natural gas transportation and storage | $ | 1,847 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (41) |  |  | $ | 1,806 |
Gathering, processing, transportation, fractionation, and storage: |  |  |  |  |  |  |  |  |  |  |  |  |
Monetary consideration | 418 |  |  | 922 |  |  | 871 |  |  | — |  |  | — |  |  | (100) |  |  | 2,111 |
Commodity consideration | 51 |  |  | 1 |  |  | 44 |  |  | — |  |  | — |  |  | — |  |  | 96 |
Other | 30 |  |  | 49 |  |  | 12 |  |  | — |  |  | — |  |  | (10) |  |  | 81 |
Total service revenues | 2,346 |  |  | 972 |  |  | 927 |  |  | — |  |  | — |  |  | (151) |  |  | 4,094 |
Product sales | 223 |  |  | 101 |  |  | 474 |  |  | 3,269 |  |  | 292 |  |  | (888) |  |  | 3,471 |
Total revenues from contracts with customers | 2,569 |  |  | 1,073 |  |  | 1,401 |  |  | 3,269 |  |  | 292 |  |  | (1,039) |  |  | 7,565 |
Other revenues (1) | 15 |  |  | 23 |  |  | — |  |  | 1,696 |  |  | 26 |  |  | (2) |  |  | 1,758 |
Other adjustments (2) | — |  |  | — |  |  | — |  |  | (3,865) |  |  | — |  |  | 371 |  |  | (3,494) |
Total revenues | $ | 2,584 |  |  | $ | 1,096 |  |  | $ | 1,401 |  |  | $ | 1,100 |  |  | $ | 318 |  |  | $ | (670) |  |  | $ | 5,829 |
Six Months Ended June 30, 2024 |  |
Revenues from contracts with customers: |  |  |  |  |  |  |  |  |  |  |  |
Service revenues: |  |  |  |  |  |  |  |  |  |  |  |  |
Regulated interstate natural gas transportation and storage | $ | 1,726 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (41) |  |  | $ | 1,685 |
Gathering, processing, transportation, fractionation, and storage: |  |  |  |  |  |  |  |  |  |  |  |  |
Monetary consideration | 303 |  |  | 875 |  |  | 831 |  |  | — |  |  | — |  |  | (75) |  |  | 1,934 |
Commodity consideration | 14 |  |  | — |  |  | 34 |  |  | — |  |  | — |  |  | — |  |  | 48 |
Other | 24 |  |  | 47 |  |  | 11 |  |  | — |  |  | — |  |  | (9) |  |  | 73 |
Total service revenues | 2,067 |  |  | 922 |  |  | 876 |  |  | — |  |  | — |  |  | (125) |  |  | 3,740 |
Product sales | 101 |  |  | 48 |  |  | 439 |  |  | 2,228 |  |  | 194 |  |  | (564) |  |  | 2,446 |
Total revenues from contracts with customers | 2,168 |  |  | 970 |  |  | 1,315 |  |  | 2,228 |  |  | 194 |  |  | (689) |  |  | 6,186 |
Other revenues (1) | 19 |  |  | 22 |  |  | 7 |  |  | 1,170 |  |  | 14 |  |  | (1) |  |  | 1,231 |
Other adjustments (2) | — |  |  | — |  |  | — |  |  | (2,537) |  |  | — |  |  | 227 |  |  | (2,310) |
Total revenues | $ | 2,187 |  |  | $ | 992 |  |  | $ | 1,322 |  |  | $ | 861 |  |  | $ | 208 |  |  | $ | (463) |  |  | $ | 5,107 |
______________ (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:
| Three Months Ended June 30,
| Williams |  | Transco |  | NWP
| 2025 |  | 2024 |  | 2025 |  | 2024 |  | 2025 |  | 2024
| (Millions)
Balance at beginning of period | $ | 104 |  |  | $ | 50 |  |  | $ | 14 |  |  | $ | — |  |  | $ | 22 |  |  | $ | 18 |
Revenue recognized in excess of amounts invoiced | 28 |  |  | 40 |  |  | — |  |  | 3 |  |  | 1 |  |  | 1 |
Minimum volume commitments invoiced | (30) |  |  | (23) |  |  | (1) |  |  | — |  |  | — |  |  | — |
Balance at end of period | $ | 102 |  |  | $ | 67 |  |  | $ | 13 |  |  | $ | 3 |  |  | $ | 23 |  |  | $ | 19 |
| Six Months Ended June 30,
| Williams |  | Transco |  | NWP
| 2025 |  | 2024 |  | 2025 |  | 2024 |  | 2025 |  | 2024
| (Millions)
Balance at beginning of period | $ | 98 |  |  | $ | 36 |  |  | $ | 10 |  |  | $ | — |  |  | $ | 21 |  |  | $ | 17 |
Revenue recognized in excess of amounts invoiced | 58 |  |  | 81 |  |  | 4 |  |  | 3 |  |  | 3 |  |  | 2 |
Minimum volume commitments invoiced | (53) |  |  | (50) |  |  | (1) |  |  | — |  |  | — |  |  | — |
Amortization of contract assets | (1) |  |  | — |  |  | — |  |  | — |  |  | (1) |  |  | — |
Balance at end of period | $ | 102 |  |  | $ | 67 |  |  | $ | 13 |  |  | $ | 3 |  |  | $ | 23 |  |  | $ | 19 |
Contract Liabilities The following tables present a reconciliation of contract liabilities:
| Three Months Ended June 30,
| Williams |  | Transco |  | NWP
| 2025 |  | 2024 |  | 2025 |  | 2024 |  | 2025 |  | 2024
| (Millions)
Balance at beginning of period | $ | 1,016 |  |  | $ | 1,053 |  |  | $ | 171 |  |  | $ | 181 |  |  | $ | — |  |  | $ | 1 |
Payments received and deferred | 86 |  |  | 75 |  |  | — |  |  | — |  |  | — |  |  | — |
Other additions | 23 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Significant financing component | 2 |  |  | 2 |  |  | — |  |  | — |  |  | — |  |  | — |
Recognized in revenue | (73) |  |  | (66) |  |  | (3) |  |  | (2) |  |  | — |  |  | — |
Balance at end of period | $ | 1,054 |  |  | $ | 1,064 |  |  | $ | 168 |  |  | $ | 179 |  |  | $ | — |  |  | $ | 1 |
| Six Months Ended June 30,
| Williams |  | Transco |  | NWP
| 2025 |  | 2024 |  | 2025 |  | 2024 |  | 2025 |  | 2024
| (Millions)
Balance at beginning of period | $ | 1,046 |  |  | $ | 1,081 |  |  | $ | 173 |  |  | $ | 184 |  |  | $ | — |  |  | $ | 2 |
Payments received and deferred | 120 |  |  | 117 |  |  | — |  |  | — |  |  | — |  |  | — |
Other additions | 23 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Significant financing component | 4 |  |  | 4 |  |  | — |  |  | — |  |  | — |  |  | — |
Recognized in revenue | (139) |  |  | (138) |  |  | (5) |  |  | (5) |  |  | — |  |  | (1) |
Balance at end of period | $ | 1,054 |  |  | $ | 1,064 |  |  | $ | 168 |  |  | $ | 179 |  |  | $ | — |  |  | $ | 1 |
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 June 30, 2025.
| Contract Liabilities
| Williams |  | Transco |  | NWP
| (Millions)
2025 (six months) | $ | 120 |  |  | $ | 5 |  |  | $ | — |
2026 (one year) | 171 |  |  | 10 |  |  | — |
2027 (one year) | 152 |  |  | 11 |  |  | — |
2028 (one year) | 130 |  |  | 11 |  |  | — |
2029 (one year) | 93 |  |  | 11 |  |  | — |
Thereafter | 388 |  |  | 120 |  |  | — |
Total | $ | 1,054 |  |  | $ | 168 |  |  | $ | — |
| Remaining Performance Obligations
| Williams |  | Transco |  | NWP
| (Millions)
2025 (six months) | $ | 2,184 |  |  | $ | 1,483 |  |  | $ | 197 |
2026 (one year) | 4,348 |  |  | 2,819 |  |  | 399 |
2027 (one year) | 4,069 |  |  | 2,655 |  |  | 380 |
2028 (one year) | 3,368 |  |  | 2,170 |  |  | 367 |
2029 (one year) | 2,796 |  |  | 1,764 |  |  | 348 |
Thereafter | 15,295 |  |  | 11,160 |  |  | 2,246 |
Total | $ | 32,060 |  |  | $ | 22,051 |  |  | $ | 3,937 |
Contract With Customer Accounts Receivable | The following is a summary of Williams’ Trade accounts and other receivables:
| June 30, 2025 |  | December 31, 2024
| (Millions)
Accounts receivable related to revenues from contracts with customers | $ | 1,295 |  |  | $ | 1,494 |
Receivables from derivatives | 209 |  |  | 294 |
Other accounts receivable | 59 |  |  | 75 |
Trade accounts and other receivables | $ | 1,563 |  |  | $ | 1,863 |

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