XML 76 R60.htm IDEA: XBRL DOCUMENT
v3.25.2

Segment Disclosures Recon from Segment to Consolidated - Revenues, Modified EBITDA, and Significant Expenses (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | $ 2,781 | $ 2,336 | $ 5,829 | $ 5,107
Other financial information: |  |  |  |  |
Proportional Modified EBITDA Equity Method Investments |  | (231) | (238) | (467) | (466)
Depreciation, Depletion and Amortization |  | (605) | (540) | (1,190) | (1,088)
Income (Loss) from Equity Method Investments |  | 142 | 147 | 297 | 284
Other investing income (loss) - net |  | 4 | 18 | 12 | 42
Interest expense |  | (350) | (339) | (699) | (688)
Asset Retirement Obligation Accretion Expense For Nonregulated Operations |  | (24) | (21) | (48) | (39)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest |  | 757 | 555 | 1,679 | 1,410
Energy Related Derivative | Not Designated as Hedging Instrument [Member] | Cost of Sales |  |  |  |  |
Other financial information: |  |  |  |  |
Unrealized Gain (Loss) on Derivatives |  | 12 | (7) | 2 | (4)
Service [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 2,041 | 1,837 | 4,044 | 3,742
NonRegulated Service Commodity Consideration [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 47 | 18 | 96 | 48
Product [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 657 | 610 | 1,715 | 1,455
Energy Commodities and Service |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 36 | (129) | (26) | (138)
Operating Segments [Member] | Transmission And Gulf Of America [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 1,312 | 1,068 | 2,584 | 2,187
Other financial information: |  |  |  |  |
Product Costs And Net Realized Processing Commodity Expenses |  | (119) | (40) | (242) | (101)
Operating And Administrative Expenses | [1] | (286) | (260) | (556) | (515)
Recovery of Direct Costs | [2] | (55) | (62) | (125) | (126)
Other Segment Income (Expenses) - Net | [3] | 2 | 53 | 15 | 97
Proportional Modified EBITDA Equity Method Investments |  | 37 | 49 | 73 | 95
Modified EBITDA |  | 891 | 808 | 1,749 | 1,637
Operating Segments [Member] | Transmission And Gulf Of America [Member] | Energy Related Derivative | Not Designated as Hedging Instrument [Member] | Cost of Sales |  |  |  |  |
Other financial information: |  |  |  |  |
Unrealized Gain (Loss) on Derivatives |  | 0 | 0 | 0 | 0
Operating Segments [Member] | Transmission And Gulf Of America [Member] | Service [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 1,176 | 1,023 | 2,311 | 2,072
Operating Segments [Member] | Transmission And Gulf Of America [Member] | Service [Member] | External Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 1,150 | 999 | 2,263 | 2,028
Operating Segments [Member] | Transmission And Gulf Of America [Member] | Service [Member] | Internal Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 26 | 24 | 48 | 44
Operating Segments [Member] | Transmission And Gulf Of America [Member] | NonRegulated Service Commodity Consideration [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 28 | 5 | 51 | 14
Operating Segments [Member] | Transmission And Gulf Of America [Member] | Product [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 108 | 40 | 223 | 101
Operating Segments [Member] | Transmission And Gulf Of America [Member] | Product [Member] | External Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 31 | 25 | 57 | 55
Operating Segments [Member] | Transmission And Gulf Of America [Member] | Product [Member] | Internal Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 77 | 15 | 166 | 46
Operating Segments [Member] | Transmission And Gulf Of America [Member] | Energy Commodities and Service |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [4] | 0 | 0 | (1) | 0
Operating Segments [Member] | Transmission And Gulf Of America [Member] | Energy Commodities and Service | Realized Gain (Loss) |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 0 | 0 | (1) | 0
Operating Segments [Member] | Transmission And Gulf Of America [Member] | Energy Commodities and Service | Unrealized Gain (Loss) |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 0 | 0 | 0 | 0
Operating Segments [Member] | Northeast G And P [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 541 | 483 | 1,096 | 992
Other financial information: |  |  |  |  |
Product Costs And Net Realized Processing Commodity Expenses |  | (38) | (18) | (90) | (37)
Operating And Administrative Expenses | [1] | (113) | (108) | (219) | (216)
Recovery of Direct Costs | [2] | (41) | (32) | (83) | (66)
Other Segment Income (Expenses) - Net | [3] | (2) | 3 | (2) | 2
Proportional Modified EBITDA Equity Method Investments |  | 154 | 153 | 313 | 310
Modified EBITDA |  | 501 | 481 | 1,015 | 985
Operating Segments [Member] | Northeast G And P [Member] | Energy Related Derivative | Not Designated as Hedging Instrument [Member] | Cost of Sales |  |  |  |  |
Other financial information: |  |  |  |  |
Unrealized Gain (Loss) on Derivatives |  | 0 | 0 | 0 | 0
Operating Segments [Member] | Northeast G And P [Member] | Service [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 497 | 465 | 994 | 944
Operating Segments [Member] | Northeast G And P [Member] | Service [Member] | External Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 494 | 462 | 987 | 937
Operating Segments [Member] | Northeast G And P [Member] | Service [Member] | Internal Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 3 | 3 | 7 | 7
Operating Segments [Member] | Northeast G And P [Member] | NonRegulated Service Commodity Consideration [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 0 | (5) | 1 | 0
Operating Segments [Member] | Northeast G And P [Member] | Product [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 44 | 23 | 101 | 48
Operating Segments [Member] | Northeast G And P [Member] | Product [Member] | External Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 17 | 5 | 35 | 7
Operating Segments [Member] | Northeast G And P [Member] | Product [Member] | Internal Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 27 | 18 | 66 | 41
Operating Segments [Member] | Northeast G And P [Member] | Energy Commodities and Service |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [4] | 0 | 0 | 0 | 0
Operating Segments [Member] | Northeast G And P [Member] | Energy Commodities and Service | Realized Gain (Loss) |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 0 | 0 | 0 | 0
Operating Segments [Member] | Northeast G And P [Member] | Energy Commodities and Service | Unrealized Gain (Loss) |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 0 | 0 | 0 | 0
Operating Segments [Member] | West [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 676 | 621 | 1,401 | 1,322
Other financial information: |  |  |  |  |
Product Costs And Net Realized Processing Commodity Expenses |  | (201) | (177) | (455) | (426)
Operating And Administrative Expenses | [1] | (150) | (148) | (302) | (287)
Recovery of Direct Costs | [2] | (15) | (12) | (29) | (23)
Other Segment Income (Expenses) - Net | [3] | (1) | (2) | 10 | (2)
Proportional Modified EBITDA Equity Method Investments |  | 32 | 36 | 70 | 61
Modified EBITDA |  | 341 | 318 | 695 | 645
Operating Segments [Member] | West [Member] | Energy Related Derivative | Not Designated as Hedging Instrument [Member] | Cost of Sales |  |  |  |  |
Other financial information: |  |  |  |  |
Unrealized Gain (Loss) on Derivatives |  | 0 | 0 | 0 | 0
Operating Segments [Member] | West [Member] | Service [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 446 | 407 | 884 | 844
Operating Segments [Member] | West [Member] | Service [Member] | External Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 393 | 372 | 786 | 769
Operating Segments [Member] | West [Member] | Service [Member] | Internal Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 53 | 35 | 98 | 75
Operating Segments [Member] | West [Member] | NonRegulated Service Commodity Consideration [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 19 | 18 | 44 | 34
Operating Segments [Member] | West [Member] | Product [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 210 | 191 | 474 | 439
Operating Segments [Member] | West [Member] | Product [Member] | External Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 31 | 34 | 71 | 106
Operating Segments [Member] | West [Member] | Product [Member] | Internal Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 179 | 157 | 403 | 333
Operating Segments [Member] | West [Member] | Energy Commodities and Service |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [4] | 1 | 5 | (1) | 5
Operating Segments [Member] | West [Member] | Energy Commodities and Service | Realized Gain (Loss) |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 1 | 5 | (1) | 5
Operating Segments [Member] | West [Member] | Energy Commodities and Service | Unrealized Gain (Loss) |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 0 | 0 | 0 | 0
Operating Segments [Member] | Gas & NGL Marketing Services |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [5] | 389 | 291 | 1,100 | 861
Other financial information: |  |  |  |  |
Product Costs And Net Realized Processing Commodity Expenses |  | (421) | (387) | (934) | (819)
Operating And Administrative Expenses | [1] | (19) | (23) | (58) | (63)
Recovery of Direct Costs | [2] | 0 | 0 | 0 | 0
Other Segment Income (Expenses) - Net | [3] | 1 | 0 | 1 | 0
Proportional Modified EBITDA Equity Method Investments |  | 8 | 0 | 11 | 0
Modified EBITDA |  | (30) | (126) | 122 | (25)
Operating Segments [Member] | Gas & NGL Marketing Services | Energy Related Derivative | Not Designated as Hedging Instrument [Member] | Cost of Sales |  |  |  |  |
Other financial information: |  |  |  |  |
Unrealized Gain (Loss) on Derivatives |  | 12 | (7) | 2 | (4)
Operating Segments [Member] | Gas & NGL Marketing Services | Service [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [5] | 0 | 0 | 0 | 0
Operating Segments [Member] | Gas & NGL Marketing Services | Service [Member] | External Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [5] | 0 | 0 | 0 | 0
Operating Segments [Member] | Gas & NGL Marketing Services | Service [Member] | Internal Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [5] | 0 | 0 | 0 | 0
Operating Segments [Member] | Gas & NGL Marketing Services | NonRegulated Service Commodity Consideration [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [5] | 0 | 0 | 0 | 0
Operating Segments [Member] | Gas & NGL Marketing Services | Product [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [5] | 403 | 423 | 1,142 | 1,010
Operating Segments [Member] | Gas & NGL Marketing Services | Product [Member] | External Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [5] | 529 | 508 | 1,461 | 1,215
Operating Segments [Member] | Gas & NGL Marketing Services | Product [Member] | Internal Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [5] | (126) | (85) | (319) | (205)
Operating Segments [Member] | Gas & NGL Marketing Services | Energy Commodities and Service |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [4],[5] | (14) | (132) | (42) | (149)
Operating Segments [Member] | Gas & NGL Marketing Services | Energy Commodities and Service | Realized Gain (Loss) |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [5] | 2 | (33) | (33) | 48
Operating Segments [Member] | Gas & NGL Marketing Services | Energy Commodities and Service | Unrealized Gain (Loss) |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [5] | (16) | (99) | (9) | (197)
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 2,918 | 2,463 | 6,181 | 5,362
Other financial information: |  |  |  |  |
Modified EBITDA |  | 1,703 | 1,481 | 3,581 | 3,242
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment | Service [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 2,119 | 1,895 | 4,189 | 3,860
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment | Service [Member] | External Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 2,037 | 1,833 | 4,036 | 3,734
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment | Service [Member] | Internal Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 82 | 62 | 153 | 126
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment | NonRegulated Service Commodity Consideration [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 47 | 18 | 96 | 48
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment | Product [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 765 | 677 | 1,940 | 1,598
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment | Product [Member] | External Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 608 | 572 | 1,624 | 1,383
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment | Product [Member] | Internal Customer |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 157 | 105 | 316 | 215
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment | Energy Commodities and Service |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues | [4] | (13) | (127) | (44) | (144)
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment | Energy Commodities and Service | Realized Gain (Loss) |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 3 | (28) | (35) | 53
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment | Energy Commodities and Service | Unrealized Gain (Loss) |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | (16) | (99) | (9) | (197)
Corporate, Non-Segment | Other Operating Segment |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | 190 | 88 | 318 | 208
Other financial information: |  |  |  |  |
Modified EBITDA |  | 118 | 47 | 193 | 123
Intersegment Eliminations [Member] |  |  |  |  |
Segment revenues [Line Items] |  |  |  |  |
Revenues |  | $ (327) | $ (215) | $ (670) | $ (463)
[1] | 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.
[2] | Recoverable power, transportation and storage costs are charges incurred which are reimbursable pursuant to FERC stipulations or customer contracts.
[3] | Other segment income (expenses) primarily includes equity AFUDC and regulatory credits and charges related to Williams’ regulated operations.
[4] | 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.
[5] | 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.

X
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 49 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-49 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 + Details
Name: | us-gaap_DepreciationDepletionAndAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 7: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(11)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-31 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-05(b)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-1 Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(10)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(15)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
Name: | us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of income (loss) for proportionate share of equity method investee's income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(10)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481664/323-10-45-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(12)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)(f)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
Name: | us-gaap_IncomeLossFromEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of interest expense classified as nonoperating. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_InterestExpenseNonoperating
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The aggregate amount of income from investments (for example, dividends) not considered a component of the entity's core operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_InvestmentIncomeNonoperating
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Return of or reimbursements received in relation to direct costs and expenses previously paid or incurred. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_RecoveryOfDirectCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-41 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 6: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-42 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-40 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-05(b)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-1 Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingRevenueReconcilingItemLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(7)(c)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(7)(c)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(7)(c)(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(7)(c)(7)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 5A -Subparagraph (SX 210.12-13A(Column F)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5A + Details
Name: | us-gaap_UnrealizedGainLossOnDerivatives
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Asset Retirement Obligation Accretion Expense For Nonregulated Operations + References No definition available. + Details
Name: | wmb_AssetRetirementObligationAccretionExpenseForNonregulatedOperations
Namespace Prefix: | wmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of our segment operating performance measure, calculated as Net income (loss) before Provision (benefit) for income taxes; Interest incurred, net of interest capitalized; Equity earnings (losses); Impairment of equity-method investments; Other investing income (loss) – net; Impairment of goodwill; Depreciation and amortization expense; Accretion expense associated with asset retirement obligations for nonregulated operations. This measure is further adjusted to include our proportionate share (based on ownership interest) of Modified EBITDA from our equity-method investments calculated consistently with the definition described above. + References No definition available. + Details
Name: | wmb_ModifiedEBITDAEarningsLoss
Namespace Prefix: | wmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Operating and Administrative Expenses + References No definition available. + Details
Name: | wmb_OperatingAndAdministrativeExpenses
Namespace Prefix: | wmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Other financial information. + References No definition available. + Details
Name: | wmb_OtherFinancialInformationAbstract
Namespace Prefix: | wmb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other Segment Income (Expenses) - Net + References No definition available. + Details
Name: | wmb_OtherSegmentIncomeExpensesNet
Namespace Prefix: | wmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Product Costs and Net Realized Processing Commodity Expenses + References No definition available. + Details
Name: | wmb_ProductCostsAndNetRealizedProcessingCommodityExpenses
Namespace Prefix: | wmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Proportional Modified EBITDA Equity Method Investments + References No definition available. + Details
Name: | wmb_ProportionalModifiedEBITDAEquityMethodInvestments
Namespace Prefix: | wmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_EnergyRelatedDerivativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=wmb_NonRegulatedServiceCommodityConsiderationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ProductMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_EnergyCommoditiesAndServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=wmb_TransmissionAndGulfOfAmericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | wmb_CustomerAxisAxis=wmb_ExternalCustomerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | wmb_CustomerAxisAxis=wmb_InternalCustomerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | wmb_StatusOfGainLossAxis=wmb_RealizedGainLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | wmb_StatusOfGainLossAxis=wmb_UnrealizedGainLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=wmb_NortheastGAndPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=wmb_WestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=wmb_GasNGLMarketingServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_IntersegmentEliminationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |