Accounts and Other Receivables, Net, Current Accounts and Other Receivables, Net, Current Schedule of Subsidiary of Limited Liability Company or Limited Partnership [Table] Subsidiary of LLC or LP [Table] Commingled investment funds - equities Commingled investment funds - equities [Member] Commingled investment funds - equities Business Combination Step Acquisition Equity Interest In Acquiree After Acquisition Percentage Business Combination Step Acquisition Equity Interest In Acquiree After Acquisition Percentage Percentage of equity in the acquiree held by the acquirer after the acquisition date in a business combination. Cash distributions to parent Cash distributions to parent Payments of Distributions to Affiliates 2026 Defined Benefit Plan, Expected Future Benefit Payment, Year Two Adjustments to reconcile to net cash provided (used) by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Disallowed business interest expense carryforward Deferred Tax Asset, Interest Carryforward Related Party Transactions [Text Block] Related Party Transactions Disclosure [Text Block] Payments of long-term debt Repayments of Long-Term Debt Unrealized Gain (Loss) Unrealized Gain (Loss) [Member] Unrealized Gain (Loss) Provision (benefit) at statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Cover [Abstract] Cover [Abstract] Lessee, Operating Lease, Liability, Payments, Due after Year Five Lessee, Operating Lease, Liability, to be Paid, after Year Five Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Redemption notification periods for commingled investment funds Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Investment Redemption, Notice Period Lessee, Operating Lease, Liability, Maturity [Table Text Block] Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Business Acquisition, Percentage of Voting Interests Acquired Business Acquisition, Percentage of Voting Interests Acquired Marketing Of Natural Gas And NGLs Marketing Of Natural Gas And NGLs [Member] Marketing Of Natural Gas And NGLs Trading Symbol Trading Symbol 5.75% Senior Unsecured Notes Due 2044 [Member] 5.75 Percent Senior Unsecured Notes Due 2044 [Member] 5.75% Senior Unsecured Notes Due 2044 [Member] Equity Method Investment, Ownership Percentage Equity Method Investment, Ownership Percentage Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Long-term debt Long-Term Debt and Lease Obligation Derivative Asset, Fair Value, Gross Asset Derivative Asset, Subject to Master Netting Arrangement, before Offset Non-NEOs Non-NEOs [Member] Tax benefit from equity-based compensation expense Share-Based Payment Arrangement, Expense, Tax Benefit Brazos Permian II, LLC [Member] Brazos Permian II LLC [Member] Brazos Permian II LLC [Member] Regulatory Liability [Line Items] Regulatory Liability [Line Items] Common Stock, Dividends, Per Share, Declared Common Stock, Dividends, Per Share, Declared 5.4% Senior Unsecured Notes Due 2044 [Member] 5.4 Percent Senior Unsecured Notes Due 2044 [Member] 5.4% Senior Unsecured Notes Due 2044 [Member] Operating income Equity Method Investment Summarized Financial Information Operating Income Equity method investment summarized financial information operating income. Aux Sable Liquid Products LP [Member] Aux Sable Liquid Products LP [Member] Aux Sable Liquid Products LP [Member] Goodwill [Policy Text Block] Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] 2027 Defined Benefit Plan, Expected Future Benefit Payment, Year Three Accounts Receivable, Allowance for Credit Loss, Current Accounts Receivable, Allowance for Credit Loss, Current Other Segment Income (Expenses) - Net Other Segment Income (Expenses) - Net Other Segment Income (Expenses) - Net Dividends and distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Disposal Group Name [Domain] Disposal Group Name [Domain] Removal Costs Removal Costs [Member] Line of Credit Facility [Table] Line of Credit Facility [Table] Regulatory credit (charge) resulting from tax rate changes Regulatory credit (charge) resulting from tax rate changes Regulatory credit (charge) resulting from tax rate changes Changes in current and noncurrent commodity derivative assets and liabilities Increase (Decrease) in Derivative Assets and Liabilities Earnings (loss) per common share [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Inventories [Policy Text Block] Inventory, Policy [Policy Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Proceeds from Stock Options Exercised Proceeds from Stock Options Exercised Fair Value Measurements, Guarantees, and Concentration of Credit Risk [Text Block] Fair Value Disclosures [Text Block] Award Timing Disclosures [Line Items] Realized Derivative, Gain (Loss) on Derivative, Net Equity Method Investee, Name [Domain] Investment, Name [Domain] Investment, Name [Domain] Crude Oil Crude Oil [Member] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Trace Midstream Acquisition Trace Midstream Acquisition [Member] Trace Midstream Acquisition Gas & NGL Marketing Services Gas & NGL Marketing Services [Member] Gas & NGL Marketing Services Range of vested shares based on extent to which certain financial targets are achieved Range Of Vested Shares Based On Extent To Which Certain Financial Targets Range Of Vested Shares Based On Extent To Which Certain Financial Targets Are Achieved Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] Plan Name [Domain] Plan Name [Domain] Laurel Mountain Midstream, LLC [Member] Laurel Mountain Midstream, LLC [Member] Laurel Mountain Midstream, LLC [Member] Regulatory assets, deferred charges, and other Other Assets, Noncurrent Other Assets, Noncurrent Leases [Abstract] Leases [Abstract] Regulatory Assets Total regulatory assets Regulatory Asset Finite-Lived Intangible Assets, Gross Finite-Lived Intangible Assets, Gross Variable Interest Entities [Text Block] Variable Interest Entity Disclosure [Text Block] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Operating Segments [Member] Operating Segments [Member] Pension Cost (Reversal of Cost) Pension Cost (Reversal of Cost) Net cash provided (used) by operating activities Net cash provided (used) by operating activities Net Cash Provided by (Used in) Operating Activities OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] (1)  Increases to property, plant, and equipment Property, Plant and Equipment, Additions Property, Plant and Equipment, Additions Accretion Asset Retirement Obligation, Accretion Expense State losses and credits Deferred Tax Assets, Operating Loss Carryforwards, State and Local Other Stockholders' Equity, Other Allowance for Funds Used During Construction, Capitalized Interest Allowance for Funds Used During Construction, Capitalized Interest Loss Contingency Accrual, Period Increase (Decrease) Loss Contingency Accrual, Period Increase (Decrease) Award Timing Method Award Timing Method [Text Block] Net periodic benefit cost (credit) (1) Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Public Utilities, Inventory, Natural Gas Public Utilities, Inventory, Natural Gas [Member] West [Member] West [Member] -- None. No documentation exists for this element. -- Measurement Frequency [Axis] Measurement Frequency [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Business Combination, Transition Related Costs Business Combination, Transition Related Costs This element represents transition-related costs incurred as the result of a business combination which costs have been expensed during the period. 3.7% Senior Unsecured Notes Due 2023 [Member] 3.7 Percent Senior Unsecured Notes Due 2023 [Member] 3.7% Senior Unsecured Notes Due 2023 [Member] Environmental Costs, Policy Environmental Costs, Policy [Policy Text Block] Insider Trading Policies and Procedures [Line Items] Fair value of plan assets Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets Use of estimates [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Adjustment to Compensation, Amount Adjustment to Compensation Amount Capital in excess of par value Additional Paid in Capital, Common Stock Compensation Amount Outstanding Recovery Compensation Amount Accounts receivable Increase (Decrease) in Accounts and Notes Receivable Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Entity Small Business Entity Small Business Other Current Liabilities [Text Block] Accounts Payable and Accrued Liabilities Disclosure [Text Block] Company Selected Measure Amount Company Selected Measure Amount Payments for debt issuance costs Payments of Debt Issuance Costs Tabular List, Table Tabular List [Table Text Block] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Deductions SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Discovery Acquisition Discovery Acquisition [Member] Discovery Acquisition Accrued environmental loss liabilities Accrual for Environmental Loss Contingencies Expected long-term rate of return on plan assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets Unrealized Unrealized Gain (Loss) on Derivatives Unrealized Gain (Loss) on Derivatives Dominion Energy, Inc Dominion Energy, Inc [Member] Dominion Energy, Inc Operating And Administrative Expenses Operating And Administrative Expenses Operating and Administrative Expenses Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Impairment of property, plant, and equipment, intangible assets, and investments [Policy Text Block] Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Asset Acquisition [Axis] Asset Acquisition [Axis] Credit Facility [Domain] Credit Facility [Domain] Taxes, Miscellaneous Taxes, Miscellaneous Exchange Gas Due To Others Exchange Gas Due To Others Carrying value as of the balance sheet date of exchange gas due to others related to gas imbalances created when providing transportation services to customers as the entity may receive or deliver different quantities of gas from shippers than the quantities delivered or received on behalf of those shippers. Goodwill Goodwill Contract With Customer, Asset [Line Items] Contract With Customer, Asset [Line Items] Contract With Customer, Asset Private Equity Funds, US Private Equity Funds, US [Member] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Proceeds from Income Tax Refunds Proceeds from Income Tax Refunds Stock Repurchase Program, Authorized Amount Share Repurchase Program, Authorized, Amount Equity-method investment basis differences [Policy Text Block] Equity Method Investment Basis Difference Policy [Policy Text Block] The policy for recognizing differences between the cost of an equity method investment and the underlying equity in the net assets of the investee. Natural Gas, Gathering, Transportation, Marketing and Processing Natural Gas, Gathering, Transportation, Marketing and Processing [Member] Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Investments Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Investments The amount of investments recognized as of the acquisition date. Fair Value Measurements, Nonrecurring [Table Text Block] Fair Value Measurements, Nonrecurring [Table Text Block] Fixed income securities Fixed Income Securities [Member] Reconciliation of Revenue from Segments to Consolidated [Table] Reconciliation of Revenue from Segments to Consolidated [Table] Stock options [Member] Share-Based Payment Arrangement, Option [Member] Depreciation and amortization expenses Depreciation Average price of shares purchased Employee Stock Ownership Plan (ESOP), Weighted Average Purchase Price of Shares Purchased Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months Lessee, Operating Lease, Liability, to be Paid, Year One Other – net Proceeds from (Payments for) Other Financing Activities Regulated Service [Member] Regulated Service [Member] Regulated Service [Member] Comprehensive income (loss) attributable to The Williams Companies, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent 7.25% Debentures Due 2026 [Member] 7.25 Percent Debentures Due 2026 [Member] 7.25% Debentures Due 2026 [Member] Pension Benefits [Member] Pension Plan [Member] Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Municipal Bonds Municipal Bonds [Member] Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type [Axis] Award Type [Axis] Award Type [Axis] Corporate debt securities Corporate Debt Securities [Member] Deferred income tax liabilities Deferred Tax Liabilities, Net Basic earnings (loss) per common share: Earnings Per Share, Basic [Abstract] Onshore Transmission Facilities Onshore Transmission Facilities [Member] Onshore transmission facilities 7.7 Percent Senior Unsecured Notes Due 2027 7.7 Percent Senior Unsecured Notes Due 2027 [Member] 7.7% Senior Unsecured Notes Due 2027 Property, Plant and Equipment, Net Property, plant, and equipment - net Property, Plant and Equipment, Net ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Noncontrolling interests in consolidated subsidiaries Equity, Attributable to Noncontrolling Interest Additional disclosures: Additional Fair Value Elements [Abstract] Derivative, Additional Notional Amount Additional Derivative Notional Amount Nominal or face amount used to calculate payment on derivatives for agreements added during the period. Deferred Tax Assets, Tax Credit Carryforwards, Foreign, Expired Deferred Tax Assets, Tax Credit Carryforwards, Foreign, Expired Amount of deferred tax asset attributable to deductible foreign tax credit carryforwards that expired in the current year. Options, Weighted Average Exercise Price, Exercisable at Period End Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Common Stock, Par or Stated Value Per Share Common Stock, Par or Stated Value Per Share Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Expiration Date Trading Arrangement Expiration Date Transportation of natural gas and related products [Member] Transportation of natural gas and related products [member] -- None. No documentation exists for this element. -- Cureton Acquisition Cureton Acquisition [Member] Cureton Acquisition INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Net Cash Provided by (Used in) Investing Activities [Abstract] 3.25 Percent Senior Unsecured Notes Due 2030 [Member] 3.25 Percent Senior Unsecured Notes Due 2030 [Member] 3.25 Percent Senior Unsecured Notes Due 2030 [Member] Operating lease liabilities (Note 14) Operating Lease, Liability, Current Operating Lease, Liability, Current Contract with Customer, Asset, Reclassified to Receivable Contract with Customer, Asset, Reclassified to Receivable Revenue Not from Contract with Customer Revenue Not from Contract with Customer Total Shareholder Return Amount Total Shareholder Return Amount Effective Income Tax Rate Reconciliation [Abstract] Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Asset Retirement Obligation, Liabilities Incurred Liabilities incurred (1) Asset Retirement Obligation, Liabilities Incurred Other – net Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Pre-tax amounts not yet recognized in Net periodic benefit cost (credit): Pre Tax Amounts Not Yet Recognized In Net Periodic Benefit Expense [Abstract] Pre-tax amounts not yet recognized in net periodic benefit expense. Pre-tax amounts recognized in Accumulated other comprehensive income (loss)[Table Text Block] Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block] Subsequent Event [Line Items] Subsequent Event [Line Items] Property, plant, and equipment, at cost Property, Plant and Equipment, Gross Members' Capital Members' Capital Natural Gas Liquids Natural Gas Liquids (NGL) [Member] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt Gain (Loss) on Derivative Instruments Gain (Loss) on Derivative Instruments [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Plan participants’ contributions Defined Benefit Plan, Plan Assets, Contributions by Plan Participant Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted Amounts attributable to The Williams Companies, Inc. available to common stockholders: Income Amounts Attributable to Parent, Disclosures [Abstract] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Washington State Climate Commitment Act Washington State Climate Commitment Act [Member] Washington State Climate Commitment Act Total stockholders’ equity Equity, Attributable to Parent 5.65 Percent Senior Unsecured Notes Due 2033 5.65 Percent Senior Unsecured Notes Due 2033 [Member] 5.65 Percent Senior Unsecured Notes Due 2033 Total gross deferred income tax assets Deferred Tax Assets, Gross Treasury stock, at cost (39 million shares at December 31, 2024 and December 31, 2023 of common stock) Treasury Stock, Value Environmental Remediation Contingency [Axis] Environmental Remediation Contingency [Axis] Remaining Performance Obligations [Member] Remaining Performance Obligations [Member] Remaining Performance Obligations [Member] Regulatory Liability, Amortization Period Regulatory Liability, Amortization Period Business Combinations [Abstract] Business Combinations [Abstract] Maximum ratio of debt to EBITDA Maximum Ratio Of Debt To EBITDA Maximum Ratio Of Debt To EBITDA Schedule of Goodwill [Table Text Block] Schedule of Goodwill [Table Text Block] Derivative assets Derivative Asset, Current Deferred Taxes On Equity Funds Used During Construction Deferred Taxes On Equity Funds Used During Construction [Member] Deferred taxes on equity funds used during construction Increase (Decrease) in Accounts Payable, Related Parties Increase (Decrease) in Accounts Payable, Related Parties Credit facility, letters of credit outstanding Letters of Credit Outstanding, Amount Additions Other SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account Selling, general, and administrative expenses Selling, General and Administrative Expense Deferred Fuel Costs Deferred Fuel Costs [Member] Plans with a projected benefit obligation in excess of plan assets: Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract] Employer's contributions charged to expense under defined contribution plan Defined Contribution Plan, Cost Schedule of Change in Asset Retirement Obligation Schedule of Change in Asset Retirement Obligation [Table Text Block] Utility Plant [Domain] Utility Plant [Domain] Cost of Sales Cost of Sales [Member] Product [Member] Product [Member] Auditor [Table] Auditor [Table] Pro Forma [Member] Pro Forma [Member] Shares authorized for issuance Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Document Fiscal Period Focus Document Fiscal Period Focus Net unrealized (gain) loss from commodity derivative instruments Unrealized Gain (Loss) on Derivatives and Commodity Contracts 2028 Long-Term Debt, Maturity, Year Four Alaska refinery contamination litigation (Note 1) Estimated Litigation Liability, Current Business Combination, Acquisition Related Costs Business Combination, Acquisition Related Costs All Executive Categories All Executive Categories [Member] Balance Sheet Location [Domain] Statement of Financial Position Location, Balance [Domain] Pension Costs Pension Costs [Member] Equity securities Equity Securities [Member] Finite-Lived Intangible Assets, Amortization Expense, Year Two Finite-Lived Intangible Asset, Expected Amortization, Year Two Energy Related Derivative Energy Related Derivative [Member] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Business Acquisition, Goodwill, Expected Tax Deductible Amount Business Acquisition, Goodwill, Expected Tax Deductible Amount ASSETS Assets [Abstract] Assets [Abstract] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Other comprehensive income (loss) Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Document Type Document Type Derivative Contract [Domain] Derivative Contract [Domain] Regulatory Assets and Liabilities [Table Text Block] Schedule of Regulatory Assets and Liabilities [Text Block] Net actuarial loss (gain) (1) Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Proceeds from (payments of) commercial paper – net Proceeds from (Repayments of) Commercial Paper Reconciliation of revenue from segment to consolidated [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Nonrelated Party Nonrelated Party [Member] Electric Power Cost Electric Power Cost [Member] Electric power cost Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress 4.85 Percent Senior Unsecured Notes Due 2048 [Member] 4.85 Percent Senior Unsecured Notes Due 2048 [Member] 4.85% Senior Unsecured Notes Due 2048 [Member] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plan [Table] Public Utilities General Disclosures Public Utilities General Disclosures [Table Text Block] Contract with Customer, Asset and Liability [Table Text Block] Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Regulatory Assets and Liabilities [Line Items] Regulatory Asset [Line Items] Subsequent Event [Table] Subsequent Event [Table] Maximum [Member] Maximum [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Maximum ratio of debt to EBITDA after acquisition Maximum Ratio Of Debt To EBITDA After Acquisition Maximum Ratio Of Debt To EBITDA permitted under covenants for the fiscal quarter and the two following fiscal quarters after an acquisition. Northwest Natural Gas Company Northwest Natural Gas Company [Member] Northwest Natural Gas Company Accounts payable Accounts payable Accounts payable Accounts Payable, Current Potentially Responsible Party At Various Superfund And State Waste Disposal Sites Potentially Responsible Party At Various Superfund And State Waste Disposal Sites [Member] Potentially Responsible Party At Various Superfund And State Waste Disposal Sites Gain (Loss) Related to Litigation Settlement Gain (Loss) from Litigation Settlement Lease, Cost Lease, Cost Statistical Measurement [Axis] Statistical Measurement [Axis] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value Property, plant and equipment Deferred Tax Liabilities, Property, Plant and Equipment Comprehensive income (loss): Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Name Outstanding Recovery, Individual Name 5.8 Percent Senior Unsecured Notes Due 2054 5.8 Percent Senior Unsecured Notes Due 2054 [Member] 5.8 Percent Senior Unsecured Notes Due 2054 Appalachia Midstream Services, LLC [Member] Appalachia Midstream Services, LLC [Member] Appalachia Midstream Services, LLC [Member] Reportable Segment, Aggregation before Other Operating Segment Reportable Segment, Aggregation before Other Operating Segment [Member] Unusual or Infrequent Item [Line Items] Unusual or Infrequent Item, or Both [Line Items] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Variable Lease, Cost Variable Lease, Cost Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net RMM Acquisition RMM Acquisition [Member] RMM Acquisition Increase (Decrease) in Allowance for Equity Funds Used During Construction Increase (Decrease) in Allowance for Equity Funds Used During Construction Award Timing Predetermined Award Timing Predetermined [Flag] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Cash contributions from parent Cash contributions from parent Proceeds from Contributions from Parent Common dividends paid Payments of Ordinary Dividends, Common Stock Former Alaska Refinery [Member] Former Alaska Refinery [Member] Schedule of Equity Method Investment, Equity Method Investee, Name [Axis] Investment, Name [Axis] Investment, Name [Axis] Customer relationships [Member] Customer Relationships [Member] Net income (loss) available to common stockholders - Diluted Earnings Per Share, Diluted Goodwill, Period Increase (Decrease) Goodwill, Period Increase (Decrease) Expected benefit payments Defined Benefit Plan, Expected Future Benefit Payment [Abstract] Dec21 And Subsequent Quarters [Member] Dec21 And Subsequent Quarters [Member] Dec21 And Subsequent Quarters Stock Repurchase Program Cumulative Amount Purchased Stock Repurchase Program Cumulative Amount Purchased Cumulative amount of stock repurchased under the repurchase plan. Regulatory Liability [Domain] Regulatory Liability [Domain] Total Current Income Tax Expense (Benefit) Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Ownership [Axis] Ownership [Axis] Retirement Benefits [Abstract] Retirement Benefits [Abstract] Gross deferred income tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Preferred Stock, Shares Issued Preferred Stock, Shares Issued Customer [Axis] Customer Axis [Axis] Customer Axis Customer [Axis] Customer [Axis] Leidy South Leidy South [Member] Leidy South Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Other Deferred Tax Liabilities, Other Net income (loss) Net income (loss) Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Indemnification Agreement [Member] Indemnification Agreement [Member] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Less: Provision (benefit) for income taxes Less: Provision (benefit) for income taxes Income Tax Expense (Benefit) Interest cost Interest cost Defined Benefit Plan, Interest Cost Summarized Financial Position and Results of Operations of Equity Method Investments [Table Text Block] Equity Method Investment Summarized Financial Position And Results Of Operations [Table Text Block] Tabular disclosure of summarized financial position and results of operations of equity method investments. Derivative, Notional Amount Derivative, Notional Amount Derivative Asset Derivative Asset Components of net periodic benefit cost (credit): Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] 5.15 Percent Senior Unsecured Notes Due 2034 5.15 Percent Senior Unsecured Notes Due 2034 [Member] 5.15 Percent Senior Unsecured Notes Due 2034 Unrecognized equity-based compensation expense, Weighted-average period of recognition in years Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Increase (Decrease) in Accounts Payable And Accrued Liabilities Related To Capital Expenditures Increase (Decrease) in Accounts Payable And Accrued Liabilities Related To Capital Expenditures The increase (decrease) during the reporting period in future cash outflows for liabilities incurred associated with capital expenditures. Revenue from Contract with Customer, Excluding Assessed Tax Revenue from Contract with Customer, Excluding Assessed Tax Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Pension and other postretirement benefits: Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract] Inventory write-downs Inventory Write-down 4.3% Senior Unsecured Notes Due 2024 [Member] 4.3 Percent Senior Unsecured Notes Due 2024 [Member] 4.3% Senior Unsecured Notes Due 2024 [Member] Net cash provided (used) by investing activities Net cash provided (used) by investing activities Net Cash Provided by (Used in) Investing Activities Business Acquisition [Line Items] Business Acquisition [Line Items] Net increase (decrease) in equity Stockholders' Equity, Period Increase (Decrease) Site Contingency, Loss Exposure Not Accrued, Best Estimate Site Contingency, Loss Exposure Not Accrued, Best Estimate Other, including changes in noncurrent assets and liabilities Other Operating Activities, Cash Flow Statement Other Operating Activities, Cash Flow Statement All Adjustments to Compensation All Adjustments to Compensation [Member] Employee costs Employee-related Liabilities, Current Investments [Table Text Block] Equity Method Investments [Table Text Block] 5.6 Percent Senior Unsecured Notes Due 2035 5.6 Percent Senior Unsecured Notes Due 2035 [Member] 5.6 Percent Senior Unsecured Notes Due 2035 Guarantor Obligations, Maximum Exposure, Undiscounted Guarantor Obligations, Maximum Exposure, Undiscounted Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Legal Entity [Axis] Legal Entity [Axis] Gas Pipeline [Member] Gas Pipeline [Member] Status Of Gain (Loss) [Axis] Status Of Gain (Loss) [Axis] Status of Gain (Loss) Regulatory Asset [Axis] Regulatory Asset [Axis] Defined Contribution Plan Defined Contribution Plan Disclosure [Line Items] Scenario [Domain] Scenario [Domain] Swing Line Loan [Member] Swing Line Loan [Member] Swing line loan [Member] Certain Gulf Coast Liquids Pipelines Certain Gulf Coast Liquids Pipelines [Member] Certain Gulf Coast Liquids Pipelines Debt Securities, Trading, and Equity Securities, FV-NI Debt Securities, Trading, and Equity Securities, FV-NI Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Corporate alternative minimum tax credits Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax Entity Address, State or Province Entity Address, State or Province Derivative Instruments and Hedging Activities Disclosure [Abstract] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Accounts Payable, Trade, Current Accounts Payable, Trade, Current Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] IncreaseDecreaseInAdvancesToAffiliates IncreaseDecreaseInAdvancesToAffiliates The increase (decrease) during the reporting period in the amount owed to the reporting entry (during the current year or operating cycle) in the form of demand notes. Net increase (decrease) in benefit obligation Defined Benefit Plan, Benefit Obligation, Period Increase (Decrease) Disposal Group, Consideration Disposal Group, Including Discontinued Operation, Consideration Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Financial Instruments [Domain] Financial Instruments [Domain] NGLs, natural gas, and related products and services [Member] Sale Of NGL And Related Products And Services [Member] Sale of NGL and Related Products and Services [Member] 4.65 Percent Senior Unsecured Notes Due 2032 4.65 Percent Senior Unsecured Notes Due 2032 [Member] 4.65 Percent Senior Unsecured Notes Due 2032 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Liabilities and Equity [Abstract] Liabilities and Equity [Abstract] Schedule of Net Benefit Cost (Credit) [Table Text Block] Schedule of Net Benefit Costs [Table Text Block] NonRegulated Service Monetary Consideration [Member] NonRegulated Service Monetary Consideration [Member] NonRegulated Service Monetary Consideration [Member] Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Related Party Transaction, Rate Related Party Transaction, Rate Restatement Determination Date Restatement Determination Date Fair Value [Member] Estimate of Fair Value Measurement [Member] Additions Charged (Credited) To Cost and Expenses SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Natural gas gathering and processing facilities [Member] Gas Gathering and Processing Equipment [Member] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] NonRegulated Service Commodity Consideration [Member] NonRegulated Service Commodity Consideration [Member] NonRegulated Service Commodity Consideration [Member] Options, Weighted Average Exercise Price, Ending Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Cash balance interest crediting rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted-Average Interest Crediting Rate Concentration Risk [Table] Concentration Risk [Table] Operating Lease, Right-of-Use Asset Operating Lease, Right-of-Use Asset Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Options Outstanding, Ending Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Issuances and Retirements [Abstract] Debt Instruments [Abstract] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Purchases of and contributions to equity-method investments (Note 8) Equity-method investment, payments to purchase or contributions Payments to Acquire Equity Method Investments Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Transco's annual funding commitment for ARO Other Commitment, to be Paid, Year One Financial Liabilities Fair Value Disclosure Financial Liabilities Fair Value Disclosure Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Other Regulatory Assets (Liabilities) Other Regulatory Assets (Liabilities) [Member] Subsequent Event [Member] Subsequent Event [Member] Costs and expenses: Costs and Expenses [Abstract] Costs and Expenses [Abstract] 3.95 Percent Senior Unsecured Notes Due 2050 [Member] 3.95 Percent Senior Unsecured Notes Due 2050 [Member] 3.95 Percent Senior Unsecured Notes Due 2050 [Member] Net unrealized gain (loss) from derivative instruments, net of taxes of $(2), $(8), and $1 in 2024, 2023, and 2022, respectively Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Income taxes [Policy Text Block] Income Tax, Policy [Policy Text Block] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Segments [Domain] Segments [Domain] Regulatory liabilities, deferred income, and other Other Liabilities and Deferred Revenue, Noncurrent Other Liabilities and Deferred Revenue, Noncurrent Noncurrent liabilities Liability, Other Postretirement Defined Benefit Plan, Noncurrent Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share PEO PEO [Member] Name Trading Arrangement, Individual Name Funded status — overfunded (underfunded) Funded status - overfunded (underfunded) Defined Benefit Plan, Funded (Unfunded) Status of Plan Property, Plant and Equipment by Type [Axis] Long-Lived Tangible Asset [Axis] Entity Public Float Entity Public Float Disposal Group Name [Axis] Disposal Group Name [Axis] Investee Investee [Member] Appalachia Midstream Investments [Member] Appalachia Midstream Investments [Member] Appalachia Midstream Investments [Member] Equity earnings (losses) Equity (earnings) losses Income (Loss) from Equity Method Investments Income (Loss) from Equity Method Investments Benefit obligation at beginning of year Benefit obligation at end of year Defined Benefit Plan, Benefit Obligation Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Conway Fractionator [Member] Conway Fractionator [Member] Conway Fractionator [Member] Other [Member] Other Equity Method Investment [Member] Total equity method investments not separately disclosed. Other investing income (loss) – net Other investing income (loss) - net Investment Income, Nonoperating Shares reserved for future issuance Common Stock, Capital Shares Reserved for Future Issuance SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount IncreaseDecreaseInOtherRegulatoryLiabilities IncreaseDecreaseInOtherRegulatoryLiabilities The (increase) decrease during the reporting period in the value of other regulatory liabilities that are created when regulatory agencies permits public utilities to defer revenues to the balance sheet. 8.75% Senior Unsecured Notes Due 2032 [Member] 8.75 Percent Senior Unsecured Notes Due 2032 [Member] 8.75% Senior Unsecured Notes Due 2032 [Member] Gathering Facilities Gathering Facilities [Member] Gathering facilities Local Phone Number Local Phone Number Less valuation allowance Deferred Tax Assets, Valuation Allowance Audit Information [Abstract] Audit Information [Abstract] Audit Information Debt, Long-Term and Short-Term, Combined Amount Debt, Long-Term and Short-Term, Combined Amount Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Operating Expenses Operating Expenses Operating Expenses Schedule of Equity Method Investments [Table] Equity Method Investment [Table] Cash provided (used) by changes in current assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Increase (Decrease) in Operating Capital [Abstract] Document Financial Statement Restatement Recovery Analysis [Flag] Document Financial Statement Restatement Recovery Analysis [Flag] PEO Total Compensation Amount PEO Total Compensation Amount Derivative Liability, Fair Value, Gross Liability Derivative Liability, Subject to Master Netting Arrangement, before Offset Deferred Cash Out Deferred Cash Out [Member] Deferred cash out Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Interest on debt Interest Payable, Current Income Statement Location [Axis] Statement of Income Location, Balance [Axis] Unusual or Infrequent Item [Axis] Unusual or Infrequent Item, or Both [Axis] Defined Benefit Plan by Plan Asset Categories [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Oil and Gas, Purchased [Member] Oil and Gas, Purchased [Member] Common Stock Common Stock [Member] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Total Members' Equity Balance at beginning of year Balance at end of year Total Members' Equity Members' Equity Property, Plant, and Equipment, Depreciation Rate Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service Segment Reporting [Abstract] Segment Reporting [Abstract] Intangible assets [Policy Text Block] Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Entity Central Index Key Entity Central Index Key Scenario [Axis] Scenario [Axis] Total interest and penalties accrued as uncertain tax positions Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Oil and Gas, Exploration and Production Oil and Gas, Exploration and Production [Member] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Recovery of Direct Costs Recovery of Direct Costs Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Financial Instrument [Axis] Financial Instrument [Axis] Segment Disclosures [Text Block] Segment Reporting Disclosure [Text Block] Long-Term Debt, Current Maturities Long-Term Debt, Current Maturities 7.125% Debentures Due 2025 [Member] 7.125 Percent Debentures Due 2025 [Member] 7.125% Debentures Due 2025 [Member] Asset Retirement Obligation [Abstract] Asset Retirement Obligation [Abstract] Fair Value, Inputs, Level 1, 2 and 3 [Member] Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Fuel Cost Fuel Cost [Member] Amount represents the difference between gas retained from customers and the gas consumed in operations. Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Measurement Basis [Axis] Measurement Basis [Axis] Title Trading Arrangement, Individual Title Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Axis] Defined Contribution Plan [Table] Defined Contribution Plan [Table] Other financial information: Other Financial Information [Abstract] Other financial information. Other Comprehensive Income Loss, Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Included In Net Periodic Benefit Cost (Credit), Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax Less: Comprehensive income (loss) attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Internal Revenue Service (IRS) [Member] Internal Revenue Service (IRS) [Member] City Area Code City Area Code Current liabilities: Liabilities, Current [Abstract] Liabilities, Current [Abstract] Auditor Location Auditor Location Accrued liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Former Operations [Member] Former Operations [Member] Former Operations. Revenue recognition [Policy Text Block] Revenue [Policy Text Block] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Interest Income and Interest Expense Disclosure Interest Income and Interest Expense Disclosure [Table Text Block] Preferred Stock Preferred Stock [Member] Purchases of treasury stock Payments for Repurchase of Common Stock Deferred Tax Asset Valuation Allowance [Member] SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] Investment Income Investment Income [Table Text Block] Document Information [Line Items] Document Information [Line Items] Pension and other postretirement benefits [Policy Text Block] Pension and Other Postretirement Plans, Policy [Policy Text Block] Long-Term Debt, Excluding Current Maturities Long-Term Debt, Excluding Current Maturities Transcontinental Gas Pipe Line Company, LLC [Member] Transcontinental Gas Pipe Line Company, LLC [Member] Transcontinental Gas Pipe Line Company, LLC [Member] 6.3% Senior Unsecured Notes Due 2040 [Member] 6.3 Percent Senior Unsecured Notes Due 2040 [Member] 6.3% Senior Unsecured Notes Due 2040 [Member] Accounts receivable [Policy Text Block] Receivable [Policy Text Block] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] State deferred income tax rate change Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Increases (decreases) in taxes resulting from: Increases Decreases In Taxes Resulting From [Abstract] Increases (decreases) in taxes resulting from. Subsequent Event Type [Axis] Subsequent Event Type [Axis] General, Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies [Text Block] Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Quarters Ending Time [Domain] Quarters Ending Time [Domain] [Domain] for Quarters Ending Time [Axis] Natural Gas, Storage Natural Gas, Storage [Member] Retained deficit Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit) Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] Class of Stock [Domain] Class of Stock [Domain] Asset Retirement Obligation Costs [Member] Asset Retirement Obligation Costs [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Inventories Increase (Decrease) in Inventories Increase (Decrease) in Inventories Schedule of Debt Issuances Schedule of Debt [Table Text Block] General and Administrative Expense General and Administrative Expense 2026 Long-Term Debt, Maturity, Year Two Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Equity Awards Adjustments Equity Awards Adjustments [Member] Operating Lease, Liability Operating Lease, Liability MountainWest [Member] MountainWest [Member] MountainWest Underlying Securities Award Underlying Securities Amount Performance Shares [Member] Performance Shares [Member] Contract liabilities (Note 5) Deferred Revenue, Current Increase (Decrease) in Regulatory Liabilities Noncurrent Increase (Decrease) in Regulatory Liabilities Noncurrent The increase (decrease) during the reporting period in noncurrent regulatory liabilities. Noncurrent regulated liabilities are created when regulatory agency permits an entity to defer revenues to the balance sheet. Regulatory Assets, Current Regulatory Asset, Current Cash flow hedging activities: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax [Abstract] Weighted average assumptions utilized to determine net periodic benefit cost (credit) Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Public Utilities, Allowance For Funds Used During Construction, Capitalized Cost of Debt Public Utilities, Allowance For Funds Used During Construction, Capitalized Cost Of Debt The component of the allowance for funds used during construction during the period based on an assumed interest rate on borrowed funds used in financing the construction of regulated assets. Increase (Decrease) in Other Regulatory Assets Increase (Decrease) in Other Regulatory Assets Interest Income, Other Interest Income, Other Dividends, Common Stock, Cash Dividends, Common Stock, Cash Amendment Flag Amendment Flag Carrying Amount [Member] Reported Value Measurement [Member] Commercial paper Commercial paper, outstanding Commercial Paper Plan participants’ contributions Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] 7.08% Debentures Due 2026 [Member] 7.08 Percent Debentures Due 2026 [Member] 7.08% Debentures Due 2026 [Member] Government debt securities Defined Benefit Plan, Debt Security [Member] Subsequent Events [Abstract] Subsequent Events [Abstract] Actual return on plan assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Debt and Banking Arrangements [Text Block] Debt Disclosure [Text Block] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Long-term debt face amount Debt Instrument, Face Amount Debt Instrument, Face Amount Construction Project Construction Project [Member] Construction Project Entity Address, Postal Zip Code Entity Address, Postal Zip Code Northwest Pipeline LLC [Member] Northwest Pipeline LLC [Member] Northwest Pipeline LLC [Member] 3.6% Senior Unsecured Notes Due 2022 [Member] 3.6 Percent Senior Unsecured Notes Due 2022 [Member] 3.6% Senior Unsecured Notes Due 2022 [Member] Balance at beginning of period Balance at end of period Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Other Postretirement Benefits Cost (Reversal of Cost) Other Postretirement Benefits Cost (Reversal of Cost) Asset Retirement Obligations, Net Asset Retirement Obligations, Net [Member] Asset retirement obligations, net Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized [Abstract] Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount [Abstract] General and Description Of Business [Abstract] Description Of Business [Abstract] Description Of Business [Abstract] Blue Racer Midstream LLC [Member] Blue Racer Midstream LLC [Member] Blue Racer Midstream LLC Retirement Benefits, Description [Abstract] Retirement Benefits, Description [Abstract] Other – net Payments for (Proceeds from) Other Investing Activities Regulatory assets, deferred charges, and other [Member] Other Noncurrent Assets [Member] Other current liabilities Increase (Decrease) in Other Current Liabilities Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Auditor Name Auditor Name Internal Customer Internal Customer [Member] Internal Customer Other Current Liabilities Other Current Liabilities [Member] Current : Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Property, Plant and Equipment, Useful Life Property, Plant and Equipment, Useful Life Variable Interest Entity, Not Primary Beneficiary [Member] Variable Interest Entity, Not Primary Beneficiary [Member] Rollforward of stock option activity and related information Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Accounts payable Increase (Decrease) in Accounts Payable Environmental Remediation Contingency [Domain] Environmental Remediation Contingency [Domain] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Williams Companies Inc [Member] The Williams Companies, Inc. [Member] Williams Companies Inc [Member] -- None. No documentation exists for this element. -- Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage Net income (loss) available to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Accrued Liabilities [Table] Accrued Liabilities [Table] Accrued Liabilities [Table] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Total assets Total assets Assets Asset Retirement Obligation Accretion Expense For Nonregulated Operations Asset Retirement Obligation Accretion Expense For Nonregulated Operations Asset Retirement Obligation Accretion Expense For Nonregulated Operations Auditor [Line Items] Auditor [Line Items] Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Capital expenditures (1) Capital expenditures Payments to Acquire Property, Plant, and Equipment Other Liabilities, Noncurrent Other Liabilities, Noncurrent Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Contingent liabilities and commitments (Note 18) Contingent liabilities and commitments Commitments and Contingencies Provision for income taxes at federal statutory rate [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Revenues Adjustments For Certain Risk Management Activities Costs Revenues Adjustments For Certain Risk Management Activities Costs Revenues Adjustments for Certain Risk Management Activities Costs Postretirement Benefit Costs Postretirement Benefit Costs [Member] Termination Date Trading Arrangement Termination Date Accounts Payable and Accrued Liabilities Accounts Payable and Accrued Liabilities [Member] Pension and other postretirement benefits: Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Lessee, Operating Lease, Liability, Payments, Due Year Two Lessee, Operating Lease, Liability, to be Paid, Year Two Regulated [Member] Regulated Operation [Member] Provision (Benefit) for Income Taxes (Textuals) [Abstract] Provision (Benefit) for Income Taxes (Textuals) [Abstract] ProvisionBenefitForIncomeTaxesTextualsAbstract 2025 Long-Term Debt, Maturity, Year One Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Credit To Expenses From Affiliates Credit To Expenses From Affiliates Credit to Expenses from Affiliates Debt Instrument [Axis] Debt Instrument [Axis] Revenue Recognition [Abstract] Revenue Recognition [Abstract] Net income (loss) attributable to The Williams Companies, Inc. Net income Net Income (Loss) Attributable to Parent Other (income) expense – net Other Operating Income (Expense), Net Other Operating Income (Expense), Net Trading Arrangement: Trading Arrangement [Axis] Regulated and Unregulated Operation [Domain] Regulated and Unregulated Operation [Domain] 2030-2034 Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] External Customer External Customer [Member] External Customer Fair values of plan assets [Table Text Block] Schedule of Allocation of Plan Assets [Table Text Block] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Entity File Number Entity File Number Defined Benefit Plan, Assumptions [Table Text Block] Defined Benefit Plan, Assumptions [Table Text Block] Consolidated Entities [Domain] Consolidated Entities [Domain] Noncontrolling Interests Noncontrolling Interest [Member] Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Federal Current Federal Tax Expense (Benefit) Extinguishment of Debt, Amount Extinguishment of Debt, Amount Transfers into Level 3 Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 Lessee, Operating Lease, Term of Contract Lessee, Operating Lease, Term of Contract Name Forgone Recovery, Individual Name Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Debt Securities, Trading, and Equity Securities, FV-NI, Cost Debt Securities, Trading, and Equity Securities, FV-NI, Cost Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Expected benefit payments [Table Text Block] Schedule of Expected Benefit Payments [Table Text Block] Credit Facility and Commercial Paper [Line Items] Line of Credit Facility [Line Items] Contract with Customer, Asset, Net - Beginning of Period Contract with Customer, Asset, Net - End of Period Contract with Customer, Asset, after Allowance for Credit Loss Slug Catcher Slug Catcher [Member] Slug catcher Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Public Utility [Axis] Public Utility [Axis] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Income (Loss) from Continuing Operations, Per Diluted Share Income (Loss) from Continuing Operations, Per Diluted Share Cost of Revenue Cost of Revenue Adjustment to Compensation: Adjustment to Compensation [Axis] Less: Net income (loss) attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Document Quarterly Report Document Quarterly Report Investments Deferred Tax Liabilities, Investment in Noncontrolled Affiliates Reclassifications into earnings of net derivative instruments (gain) loss, net of taxes of $1, $1 and $— in 2024, 2023, and 2022, respectively Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax 3.9% Senior Unsecured Notes Due 2025 [Member] 3.9 Percent Senior Unsecured Notes Due 2025 [Member] 3.9% Senior Unsecured Notes Due 2025 [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Quarters Ending Time [Axis] Quarters Ending Time [Axis] Quarters Ending Time [Axis] Related Party [Axis] Related and Nonrelated Parties [Axis] Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Natural gas transmission facilities [Member] Gas, Transmission and Distribution Equipment [Member] Document Information [Table] Document Information [Table] Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Cardinal Pipeline Company, LLC Cardinal Pipeline Company, LLC [Member] Cardinal Pipeline Company, LLC - equity-method investment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Plan asset target allocation Defined Benefit Plan, Plan Assets, Target Allocation, Percentage Name Awards Close in Time to MNPI Disclosures, Individual Name Year that rate reaches ultimate trend rate Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate Construction in Progress [Member] Construction in Progress [Member] Contract with Customer, Duration [Axis] Contract with Customer, Duration [Axis] 3.75% Senior Unsecured Notes Due 2027 [Member] 3.75 Percent Senior Unsecured Notes Due 2027 [Member] 3.75% Senior Unsecured Notes Due 2027 [Member] Entity Filer Category Entity Filer Category Collateral Already Posted, Aggregate Fair Value Collateral Already Posted, Aggregate Fair Value Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Amount Share Repurchase Program [Abstract] Share Repurchase Program [Abstract] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Natural Gas Purchased For Shrink [Member] Natural Gas Purchased For Shrink [Member] Natural Gas Purchased For Shrink Liabilities settled Asset Retirement Obligation, Liabilities Settled Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Wiltel Guarantee [Member] Wiltel Guarantee [Member] Guarantee provided in the event of nonpayment by previously owned communications subsidiary, Williams Communications Group (WilTel) Private Equity Funds, Non-US Private Equity Funds, Non-US [Member] Regulatory accounting [Policy Text Block] Public Utilities, Policy [Policy Text Block] Unusual or Infrequent Item [Table] Unusual or Infrequent Item, or Both [Table] Statistical Measurement [Domain] Statistical Measurement [Domain] Natural Gas, US Regulated Natural Gas, US Regulated [Member] Lease, Cost [Table Text Block] Lease, Cost [Table Text Block] Director Director [Member] Other current liabilities Other current liabilities Other current liabilities Other Liabilities, Current Treasury stock [Policy Text Block] Treasury stock [Policy Text Block] Disclosure of accounting policy for treasury stock. Revisions (2) Asset Retirement Obligation, Revision of Estimate All Trading Arrangements All Trading Arrangements [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Variable Interest Entity, Primary Beneficiary [Member] Variable Interest Entity, Primary Beneficiary [Member] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Offshore Transmission Facilities Offshore Transmission Facilities [Member] Offshore transmission facilities SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Net increase (decrease) in fair value of plan assets Defined Benefit Plan, Plan Assets, Period Increase (Decrease) 4.55% Senior Unsecured Notes Due 2024 [Member] 4.55 Percent Senior Unsecured Notes Due 2024 [Member] 4.55% Senior Unsecured Notes Due 2024 [Member] Amounts included in regulatory liabilities associated with Transco and Northwest Pipeline: Net Regulatory Assets [Abstract] Customer [Domain] Customer Domain [Domain] Customer [Domain] Regulatory Assets And Liabilities [Line Items] Regulatory Assets And Liabilities [Line Items] Regulatory Assets And Liabilities Equity-method investments Equity Method Investments Pay vs Performance Disclosure [Line Items] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Direction and pattern of change for assumed health care cost trend rate Defined Benefit Plan, Assumed Health Care Cost Trend Rate, Description Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Realized Gain (Loss) Realized Gain (Loss) [Member] Realized Gain (Loss) Amortization Period Of Difference Between Expected And Actual Return On Plan Assets Amortization Period Of Difference Between Expected And Actual Return On Plan Assets Amortization Period Of Difference Between Expected And Actual Return On Plan Assets for calculation of market-related value of plan assets Income Tax Contingency [Table] Income Tax Contingency [Table] Other Receivable [Member] Other Receivable [Member] Other receivables. Intangible assets – net of accumulated amortization Intangible Assets, Net (Including Goodwill) Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Cash balance interest crediting rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate Other Performance Measure, Amount Other Performance Measure, Amount Finite-Lived Intangible Assets, Amortization Expense, Year Three Finite-Lived Intangible Asset, Expected Amortization, Year Three Rate of compensation increase Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Leases [Text Block] Lessee, Operating Leases [Text Block] Subsidiary of Limited Liability Company or Limited Partnership [Line Items] Subsidiary of Limited Liability Company or Limited Partnership [Line Items] Documents Incorporated by Reference [Text Block] Documents Incorporated by Reference [Text Block] Operating Lease, Cost Operating Lease, Cost Short-Term Debt, Weighted Average Interest Rate, at Point in Time Short-Term Debt, Weighted Average Interest Rate, at Point in Time Total long-term debt, including current portion Debt and Lease Obligation Shares available for future grants Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Operating Lease, Liability, Noncurrent Operating Lease, Liability, Noncurrent Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid 4.9 Percent Senior Unsecured Notes Due 2029 4.9 Percent Senior Unsecured Notes Due 2029 [Member] 4.9 Percent Senior Unsecured Notes Due 2029 Regulated Operation, Regulatory Liability [Table] Regulated Operation, Regulatory Liability [Table] Noncurrent assets Assets, Noncurrent Product and Service, Other Product and Service, Other [Member] OperatingFeesAndCostsBilledToThirdParty OperatingFeesAndCostsBilledToThirdParty OperatingFeesAndCostsBilledToThirdParty-include operational management fees and expenses billed/rebilled to third party (usually an operated EMI) Schedule of Regulatory Assets [Table] Regulated Operation, Regulatory Asset [Table] 5.40 Percent Senior Unsecured Notes Due 2026 5.40 Percent Senior Unsecured Notes Due 2026 [Member] 5.40 Percent Senior Unsecured Notes Due 2026 Schedule of Regulatory Liabilities Schedule of Regulatory Liabilities [Table Text Block] Changes in Projected Benefit Obligations, Fair Value of Plan Assets, Funded Status, and Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Changes in Projected Benefit Obligations, Fair Value of Plan Assets, Funded Status, and Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Changes in Projected Benefit Obligations, Fair Value of Plan Assets, Funded Status, and Schedule of Amounts Recognized in Balance Sheet Service cost Defined Benefit Plan, Service Cost Northeast G And P [Member] Northeast G And P [Member] -- None. No documentation exists for this element. -- Entity Tax Identification Number Entity Tax Identification Number Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Long-Term Debt Instruments [Table Text Block] Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Measured on a recurring basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Cash management funds Money Market Funds [Member] Ultimate health care cost trend rate Defined Benefit Plan, Ultimate Health Care Cost Trend Rate Other Service [Member] Other Service [Member] Other Service [Member] Tax Adjustments, Settlements, and Unusual Provisions Tax Adjustments, Settlements, and Unusual Provisions Selling, general and administrative expenses [Member] Selling, General and Administrative Expenses [Member] Rate of compensation increase Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Other Comprehensive Income (Loss), Defined Benefit Plan, Net Actuarial Gain (Loss) Arising During Period, Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax Treasury Stock Treasury Stock, Common [Member] Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Gross deferred income tax assets: Deferred Tax Assets, Net [Abstract] Intersegment Eliminations [Member] Intersegment Eliminations [Member] Asset Retirement Obligations, Noncurrent Asset Retirement Obligations, Noncurrent Plan Name [Axis] Plan Name [Axis] Statement, Equity Components [Axis] Equity Components [Axis] Interest capitalized [Policy Text Block] Interest Capitalization, Policy [Policy Text Block] Other current assets and deferred charges Other current assets and deferred charges Other Assets, Current Business Acquisition, Pro Forma Net Income (Loss) Business Acquisition, Pro Forma Net Income (Loss) Variable Interest Entity Disclosures [Abstract] Variable Interest Entity Disclosures [Abstract] -- None. No documentation exists for this element. -- Customer Deposits Customer Deposits The current portion of money or property received from customers which is either to be returned upon satisfactory contract completion or applied to customer receivables in accordance with the terms of the contract or the understandings. 4.45% Senior Unsecured Notes Due 2042 [Member] 4.45 Percent Senior Unsecured Notes Due 2042 [Member] 4.45% Senior Unsecured Notes Due 2042 [Member] Letters Of Credit Under Certain Bilateral Bank Agreements [Member] Letters Of Credit Under Certain Bilateral Bank Agreements [Member] Letters of Credit Under Certain Bilateral Bank Agreements [Member] Proceeds from sale of business (Note 3) Proceeds from Divestiture of Businesses, Net of Cash Divested Total costs and expenses Total costs and expenses Costs and Expenses Net actuarial gain (loss) Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Guarantees Guarantees, Fair Value Disclosure Proceeds from Decommissioning Trust Fund Assets Proceeds from Decommissioning Trust Fund Assets Diluted earnings (loss) per common share: Earnings Per Share, Diluted [Abstract] Lessee, Operating Lease, Liability, Payments, Due Year Five Lessee, Operating Lease, Liability, to be Paid, Year Five Crowheart Acquisition Crowheart Acquisition [Member] Crowheart Acquisition Gain on sale of business (Note 3) Gain (Loss) on Disposition of Business Gain (Loss) on Disposition of Business Acquisition Adjustment Of Regulated Facilities [Member] Acquisition Adjustment Included In Property Plant And Equipment For Utilities [Member] Acquisition Adjustment Included in Property Plant and Equipment for Utilities [Member] Receivables, Net, Current Receivables, Net, Current Proceeds from Issuance of Other Long-Term Debt Proceeds from Issuance of Other Long-Term Debt Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Other Liabilities Other Liabilities [Member] No. of shares purchases by employees Stock Issued During Period, Shares, Employee Stock Purchase Plans Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Cash and cash equivalents Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Amortization of actuarial (gain) loss and net actuarial loss from settlements included in net periodic benefit cost (credit), net of taxes of $1, $—, and $(4) in 2024, 2023, and 2022, respectively Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Deferred Income Tax Charge Deferred Income Tax Charge [Member] Equity-Based Compensation (Textuals) [Abstract] Stock Based Compensation (Textuals) [Abstract] Stock-Based Compensation. Designated interest rate cash flow hedging activities: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract] Unrecognized equity-based compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Net actuarial gain (loss) arising during the year Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Current assets: Assets, Current [Abstract] Assets, Current [Abstract] Gulfstream Natural Gas System, LLC [Member] Gulfstream Natural Gas System, LLC [Member] Gulfstream Natural Gas System, LLC [Member] Consolidation Items [Axis] Consolidation Items [Axis] Recoverable through rates [Member] Recoverable through rates [Member] RecoverableThroughRates Share-based Payment Arrangement, Noncash Expense [Abstract] Share-Based Payment Arrangement, Noncash Expense [Abstract] Treasury Stock, Common, Shares Treasury Stock, Common, Shares Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension Acquired Finite-Lived Intangible Asset, Weighted-Average Period before Renewal or Extension Natural Gas Underground Storage Facilities [Member] Natural Gas Under Ground Storage Facilities [Member] Natural gas underground storage facilities. 4.5% Senior Unsecured Notes Due 2023 [Member] 4.5 Percent Senior Unsecured Notes Due 2023 [Member] 4.5% Senior Unsecured Notes Due 2023 [Member] Product and Service [Domain] Products And Services [Domain] Product and Service [Domain] Derivative Liabilities [Member] Derivative Financial Instruments, Liabilities [Member] 2.6 Percent Senior Unsecured Notes Due 2031 2.6 Percent Senior Unsecured Notes Due 2031 [Member] 2.6% Senior Unsecured Notes Due 2031 Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Dalton [Member] Dalton [Member] Dalton Project [Member] Security Exchange Name Security Exchange Name Energy Commodities and Service Energy Commodities and Service [Member] Rollforward of nonvested restricted stock unit activity and related information Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] 4.6% Senior Unsecured Notes Due 2048 [Member] 4.6 Percent Senior Unsecured Notes Due 2048 [Member] 4.6% Senior Unsecured Notes Due 2048 [Member] State Current State and Local Tax Expense (Benefit) Storage Facilities Storage Facilities [Member] Storage facilities Equity-method investment, difference between carrying amount and underlying equity Equity Method Investment, Difference Between Carrying Amount and Underlying Equity 7.75% Senior Unsecured Notes Due 2031 [Member] 7.75 Percent Senior Unsecured Notes Due 2031 [Member] 7.75% Senior Unsecured Notes Due 2031 [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Other Commitment Other Commitment Performance Obligation Source [Domain] Performance Obligation Source [Domain] [Domain] for Performance Obligation Source [Axis] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] 5.3 Percent Senior Unsecured Notes Due 2052 5.3 Percent Senior Unsecured Notes Due 2052 [Member] 5.3 Percent Senior Unsecured Notes Due 2052 Targa Train 7 LLC [Member] Targa Train 7 LLC [Member] Targa Train 7 LLC Common Stock, Shares, Issued Common Stock, Shares, Issued Amortization of net actuarial loss (gain) Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Entity [Domain] Entity [Domain] Credit facility, capacity Line of Credit Facility, Maximum Borrowing Capacity Increase Decrease In Advances From Affiliates Increase Decrease In Advances From Affiliates The increase (decrease) during the reporting period in the amount owed by the reporting entity (during the current year or operating cycle) in the form of demand notes. Foreign tax credits Deferred Tax Assets, Tax Credit Carryforwards, Foreign Revenue Not from Contract with Customer, Other Revenue Not from Contract with Customer, Other Derivative Liability Derivative Liability Derivative Liability Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets [Table Text Block] Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets [Table Text Block] Reconciliation of Assets from Segment to Consolidated [Table] Reconciliation of Assets from Segment to Consolidated [Table] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Common Stock, Shares Authorized Common Stock, Shares Authorized Plans with an accumulated benefit obligation in excess of plan assets: Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] 7.5% Debentures Due 2031 [Member] 7.5 Percent Debentures Due 2031 [Member] 7.5% Debentures Due 2031 [Member] Purchases of businesses, net of cash acquired (Note 3) Payments to Acquire Businesses, Net of Cash Acquired Payments to Acquire Businesses, Net of Cash Acquired NorTex Acquisition NorTex Acquisition [Member] NorTex Acquisition Settlements Defined Benefit Plan, Plan Assets, Payment for Settlement Rocky Mountain Midstream Holdings LLC [Member] Rocky Mountain Midstream Holdings LLC [Member] Rocky Mountain Midstream Holdings LLC [Member] Gulf Coast Storage Acquisition Gulf Coast Storage Acquisition [Member] Gulf Coast Storage Acquisition Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table] 5.4% Senior Unsecured Notes Due 2041 [Member] 5.4 Percent Senior Unsecured Notes Due 2041 [Member] 5.4% Senior Unsecured Notes Due 2041 [Member] Additional amount by which credit facility can be increased Additional Amount By Which Credit Facility Can Be Increased Additional amount by which the credit facility can be increased. Entity Voluntary Filers Entity Voluntary Filers Interest Rate Derivatives, at Fair Value, Net Interest Rate Derivatives, at Fair Value, Net Related Party Related Party [Member] Amortization of net actuarial loss (gain) Defined Benefit Plan, Amortization of Gain (Loss) Segment Reporting, Asset Reconciling Item [Line Items] Segment Reporting, Asset Reconciling Item [Line Items] Hedging Designation [Domain] Hedging Designation [Domain] Balance Sheet Location [Axis] Statement of Financial Position Location, Balance [Axis] Interest Expense, Nonoperating Interest Expense, Nonoperating Total Deferred Income Tax Expense (Benefit) Property, Plant, and Equipment [Text Block] Property, Plant and Equipment Disclosure [Text Block] Discount rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Net actuarial loss from settlements Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Business Acquisition, Pro Forma Information [Table Text Block] Business Acquisition, Pro Forma Information [Table Text Block] Tax benefits realized on options exercised Share-Based Payment Arrangement, Exercise of Option, Tax Benefit Accounts Receivable related to revenues from contracts with customers [Member] Accounts Receivable Related To Contracts With Customers [Member] Accounts Receivable Related To Contracts With Customers [Member] Fair Value, Recurring [Member] Fair Value, Recurring [Member] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Accounts Receivable, after Allowance for Credit Loss, Current Accounts Receivable, after Allowance for Credit Loss, Current Options, Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Commodity Derivative Contract Risk [Domain] Commodity Derivative Contract Risk [Domain] Commodity Derivative Contract Risk [Domain] Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Fair value of plan assets at beginning of year Fair value of plan assets at end of year Total assets at fair value Defined Benefit Plan, Plan Assets, Amount Noncurrent liabilities Liability, Defined Benefit Pension Plan, Noncurrent Percentage of eligible compensation the employer will match of employee contributions Defined Contribution Plan, Employer Matching Contribution, Percent of Match Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Acquisitions and Divestitures [Text Block] Mergers, Acquisitions and Dispositions Disclosures [Text Block] Gain (Loss) on Derivative Instruments, Net, Pretax Gain (Loss) on Derivative Instruments, Net, Pretax Commercial paper [Member] Commercial Paper [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Product Costs And Net Realized Processing Commodity Expenses Product Costs And Net Realized Processing Commodity Expenses Product Costs and Net Realized Processing Commodity Expenses Document Annual Report Document Annual Report 5.8% Senior Unsecured Notes Due 2043 [Member] 5.8 Percent Senior Unsecured Notes Due 2043 [Member] 5.8% Senior Unsecured Notes Due 2043 [Member] Gain on disposition of equity-method investments (Note 8) Equity Method Investment, Realized Gain (Loss) on Disposal Equity Method Investment, Realized Gain (Loss) on Disposal Other Other than Securities Investment [Member] Overland Pass Pipeline Company LLC [Member] Overland Pass Pipeline Company LLC [Member] Overland Pass Pipeline Company LLC [Member] Sentinel Meter Station Depreciation Sentinel Meter Station Depreciation [Member] Sentinel meter station depreciation Total Stockholders' Equity Parent [Member] Amortization of Intangible Assets Amortization of Intangible Assets Contract with Customer, Liability - Beginning of Period Contract with Customer, Liability - End of Period Contract with Customer, Liability Contract with Customer, Liability Valuation And Qualifying Accounts SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Performance Obligations Related To Contract Liabilities [Member] Performance Obligations Related To Contract Liabilities [Member] Performance Obligations Related To Contract Liabilities [Member] Accounting Policies [Abstract] Accounting Policies [Abstract] LIABILITIES AND EQUITY Liabilities [Abstract] Liabilities [Abstract] Contributions [Table Text Block] Equity Method Investment Contributions Text Block [Table Text Block] Tabular disclosure of contributions paid to companies accounted for by the equity method. Revenues: Revenues [Abstract] Revenues [Abstract] Less: Preferred stock dividends Preferred Stock Dividends, Income Statement Impact Contingent liabilities [Policy Text Block] Commitments and Contingencies, Policy [Policy Text Block] Other [Member] Other [Member] Other [Member] Current Fiscal Year End Date Current Fiscal Year End Date Beginning Balance Ending Balance SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Lessee, Operating Lease, Liability, Undiscounted Excess Amount 4.9% Senior Unsecured Notes Due 2045 [Member] 4.9 Percent Senior Unsecured Notes Due 2045 [Member] 4.9% Senior Unsecured Notes Due 2045 [Member] 7.85% Senior Unsecured Notes Due 2026 [Member] 7.85 Percent Senior Unsecured Notes Due 2026 [Member] 7.85% Senior Unsecured Notes Due 2026 [Member] Regulatory Asset [Domain] Regulatory Asset [Domain] PEO Name PEO Name Award Type [Domain] Award Type [Domain] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Modified EBITDA Earnings Loss Modified EBITDA Modified EBITDA Earnings Loss 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. Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] 3.5 Percent Senior Unsecured Notes Due 2030 [Member] 3.5 Percent Senior Unsecured Notes Due 2030 [Member] 3.5 Percent Senior Unsecured Notes Due 2030 [Member] Regulatory Liabilities, Noncurrent Regulatory Liability, Noncurrent Non-PEO NEO Non-PEO NEO [Member] Derivative Notional Amount Terminated Derivative Notional Amount Terminated Nominal or face amount used to calculate payment on derivatives for agreements terminated during the period. Period of straight-line amortization Finite-Lived Intangible Asset, Useful Life 5.30 Percent Senior Unsecured Notes Due 2028 5.30 Percent Senior Unsecured Notes Due 2028 [Member] 5.30 Percent Senior Unsecured Notes Due 2028 Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Capital in Excess of Par Value Additional Paid-in Capital [Member] Contract With Customer Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Employee Benefit Plans [Text Block] Retirement Benefits [Text Block] Regulatory Liability [Axis] Regulatory Liability [Axis] New Accounting Pronouncements, Policy New Accounting Pronouncements, Policy [Policy Text Block] Items Recognized in Other Comprehensive Income (Loss) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract] Class of Stock [Axis] Class of Stock [Axis] Asset Retirement Costs - Eminence Asset Retirement Costs - Eminence [Member] Asset Retirement Costs - Eminence Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Name Measure Name Entity Interactive Data Current Entity Interactive Data Current Accrued Liabilities [Line Items] Accrued Liabilities [Line Items] Accrued Liabilities 6.0 Percent Senior Unsecured Notes Due 2055 6.0 Percent Senior Unsecured Notes Due 2055 [Member] 6.0 Percent Senior Unsecured Notes Due 2055 Member's Capital Member Units [Member] Atlantic Sunrise [Member] Atlantic Sunrise [Member] Atlantic Sunrise Project [Member] Gulfstar One [Member] Gulfstar One [Member] Gulfstar One, the primary beneficiary of a variable interest entity. Income Taxes Paid Income Taxes Paid Fair Value Assets and Liabilities Measured On Recurring Basis [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Amortization of stock-based awards Share-Based Payment Arrangement, Noncash Expense Fair Value Measured at Net Asset Value Per Share [Member] Fair Value Measured at Net Asset Value Per Share [Member] Net deferred income tax assets Deferred Tax Assets, Net of Valuation Allowance Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Members' Equity [Abstract] Members' Equity [Abstract] Provision (benefit) for deferred income taxes Deferred Income Tax Expense Benefit From Continuing And Discontinued Operations The component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing and discontinued operations. Realized and unrealized gains (losses): Included in income (loss) Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings Long-term debt interest rate Debt Instrument, Interest Rate, Stated Percentage Corporate, Non-Segment Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Additional Collateral, Aggregate Fair Value Additional Collateral, Aggregate Fair Value External Trust External Trust [Member] External Trust Service [Member] Service [Member] Interest Costs Capitalized Interest Costs Capitalized Schedule II - Valuation and Qualifying Accounts [Text Block] SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Other financing obligations Other Long-Term Debt Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Auditor Firm ID Auditor Firm ID Operating income (loss) Operating income (loss) Operating Income (Loss) Basis Risk Basis Risk [Member] Basis Risk Projected benefit obligation Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation Payments to Acquire Investments to be Held in Decommissioning Trust Fund Payments to Acquire Investments to be Held in Decommissioning Trust Fund Loss Contingency Expected Recovery Percentage Loss Contingency Expected Recovery Percentage Loss Contingency Expected Recovery Percentage Federal valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Total liabilities and equity Total liabilities and equity Liabilities and Equity Other Significant Noncash Transaction, Value of Consideration Received Other Significant Noncash Transaction, Value of Consideration Received Subsequent Events [Text Block] Subsequent Events [Text Block] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Stock Options Exercisable, Weighted Average Remaining Contractual Life Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Remaining Contractual Term Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Hedging Designation [Axis] Hedging Designation [Axis] Derivative Liability, Current Derivative Liability, Current Commodity Derivatives [Text Block] Derivative Instruments and Hedging Activities Disclosure [Text Block] Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest Purchases, issuances, and settlements Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases, Sales, Issues, Settlements Regulated Operations [Abstract] Regulated Operations [Abstract] Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Investment Income, Interest Investment Income, Interest Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Long-term debt due within one year Long-term debt due within one year Long-Term Debt and Lease Obligation, Current Maximum ratio of debt to capitalization Maximum Ratio Of Debt To Capitalization The maximum ratio of debt to capitalization (defined as net worth plus debt) permitted under the covenants. Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of Maturities of Long-Term Debt [Table Text Block] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Individual: Individual [Axis] Asset Retirement Obligation, Current Asset Retirement Obligation, Current Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Business Combination, Consideration Transferred, Liabilities Incurred Business Combination, Consideration Transferred, Liabilities Incurred Schedule of Regulatory Assets Schedule of Regulatory Assets [Table Text Block] Inventories Inventory, Net Inventory, Net Product and Service [Axis] Product and Service [Axis] Product and Service [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Statement [Line Items] Statement [Line Items] 3.91 Percent Senior Unsecured Notes due 2038 3.91 Percent Senior Unsecured Notes due 2038 [Member] 3.91 Percent Senior Unsecured Notes due 2038 Reconciliation of Modified EBITDA to Net income (loss) [Table Text Block] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Benefits paid Defined Benefit Plan, Plan Assets, Benefits Paid Property, Plant, and Equipment [Table Text Block] Property, Plant and Equipment [Table Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Sublease Income Sublease Income Business Combination, Consideration Transferred Business Combination, Consideration Transferred Cash Flows From Operating Activities Cash Flows From Operating Activities [Policy Text Block] Disclosure of accounting policy for reporting cash flows from operating activities. Increase (Decrease) in Accounts and Other Receivables Increase (Decrease) in Accounts and Other Receivables Derivative instruments and hedging activities [Policy Text Block] Derivatives, Policy [Policy Text Block] Minimum [Member] Minimum [Member] Unamortized debt issuance costs Unamortized Debt Issuance Expense Oil and Gas Properties Oil and Gas Properties [Member] Adoption Date Trading Arrangement Adoption Date Related Party Transactions [Abstract] Related Party Transactions [Abstract] Acquisition Trigger Amount Acquisition Trigger Amount Aggregate amount of acquisitions that will result in a temporary change in the Debt to EBITDA ratio requirement. 3.5 Percent Senior Unsecured Notes Due 2051 3.5 Percent Senior Unsecured Notes Due 2051 [Member] 3.5 Percent Senior Unsecured Notes Due 2051 Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Percentage Of Finite Lived Intangible Assets Impacted By Our Intent Or Ability To Renew Or Extend Arrangement Percentage Of Finite Lived Intangible Assets Impacted By Our Intent Or Ability To Renew Or Extend Arrangement Percentage Of Finite Lived Intangible Assets Impacted By Our Intent Or Ability To Renew Or Extend Arrangement Segments [Axis] Segments [Axis] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Business Acquisition, Pro Forma Revenue Business Acquisition, Pro Forma Revenue Derivative Instrument [Axis] Derivative Instrument [Axis] Long-term debt Long-Term Debt, Gross Increase (Decrease) in Accounts Receivable, Related Parties Increase (Decrease) in Accounts Receivable, Related Parties Exercise Price Award Exercise Price Deferred tax liabilities and Deferred tax assets [Table Text Block] Schedule of Deferred Tax Assets and Liabilities [Table Text Block] 4% Senior Unsecured Notes Due 2025 [Member] 4 Percent Senior Unsecured Notes Due 2025 [Member] 4% Senior Unsecured Notes Due 2025 [Member] Health care cost trend rate assumed for next fiscal year Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year Payments for (Proceeds from) Removal Costs Payments for (Proceeds from) Removal Costs Arrangement Duration Trading Arrangement Duration Proportional Modified EBITDA Equity Method Investments Proportional Modified EBITDA Equity Method Investments Proportional Modified EBITDA Equity Method Investments Total recognized in Other comprehensive income (loss) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Goodwill and Other Intangible Assets [Text Block] Goodwill and Intangible Assets Disclosure [Text Block] Income (Loss) from Continuing Operations, Per Basic Share Income (Loss) from Continuing Operations, Per Basic Share Schedule Of Variable Interest Entities [Table] Variable Interest Entity [Table] Stockholders’ equity: Equity, Attributable to Parent [Abstract] Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress Investments Investments Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Puget Sound Energy, Inc Puget Sound Energy, Inc [Member] Puget Sound Energy, Inc Derivative Receivables Derivative Receivables [Member] Derivative Receivables Debt Instrument, Term Commercial paper, maximum maturity Debt Instrument, Term Increase (Decrease) in Accounts Payable, Trade Increase (Decrease) in Accounts Payable, Trade Finite-Lived Intangible Assets, Amortization Expense, Year Four Finite-Lived Intangible Asset, Expected Amortization, Year Four Deferred income tax liabilities Deferred Tax and Other Liabilities, Noncurrent All Individuals All Individuals [Member] Schedule of Extinguishment of Debt Schedule of Extinguishment of Debt [Table Text Block] 3.53 Percent Senior Unsecured Notes due 2028 3.53 Percent Senior Unsecured Notes due 2028 [Member] 3.53 Percent Senior Unsecured Notes due 2028 Contract with Customer, Duration [Domain] Contract with Customer, Duration [Domain] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Other income (expense) – net Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Postretirement Benefits [Member] Other Postretirement Benefits Plan [Member] Net regulatory liabilities Net Regulatory Assets Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] ARO Trust investments Asset Retirement Obligation, Legally Restricted Assets, Fair Value Williams Companies Incentive Plan [Member] Williams Companies Incentive Plan [Member] Williams Companies Incentive Plan [Member] Cascade Natural Gas Corporation Cascade Natural Gas Corporation [Member] Cascade Natural Gas Corporation MountainWest Acquisition MountainWestAcquisition [Member] MountainWest Acquisition Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss) [Table Text Block] Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Income (loss) from continuing operations Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic Schedule of Line of Credit Facilities [Table Text Block] Schedule of Line of Credit Facilities [Table Text Block] Cost of natural gas sales Cost Of Natural Gas Sales Cost Of Natural Gas Sales Operating and maintenance expenses Operating Costs and Expenses Operating Costs and Expenses Cardinal Gas Services LLC [Member] Cardinal Gas Services LLC [Member] Cardinal Gas Services LLC [Member] Change in plan assets: Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Utilities Operating Expense, Maintenance and Operations Utilities Operating Expense, Maintenance and Operations Current liabilities Liability, Defined Benefit Plan, Current Other Operating Segment Other Operating Segment [Member] Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity Related Party [Domain] Related and Nonrelated Parties [Domain] Noncurrent liabilities Liabilities, Noncurrent Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Dividends and distributions [Table Text Block] Equity Method Investment Dividends Or Distributions [Table Text Block] Tabular disclosure of dividends or distributions received from companies accounted for by the equity method. Contract with Customer, Asset, Increase (Decrease) for Contract Acquired in Business Combination Contract with Customer, Asset, Increase (Decrease) for Contract Acquired in Business Combination 4.875 Percent Senior Unsecured Notes due 2041 4.875 Percent Senior Unsecured Notes due 2041 [Member] 4.875 Percent Senior Unsecured Notes due 2041 Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Federal Deferred Federal Income Tax Expense (Benefit) Other Current Liabilities [Table Text Block] Schedule of Accrued Liabilities [Table Text Block] Contributions from noncontrolling interests Contributions From Noncontrolling Interests Noncontrolling interest, increase from contributions from noncontrolling interest holders. IndexRisk IndexRisk [Member] Index Risk Cash and cash equivalents [Policy Text Block] Cash and Cash Equivalents, Policy [Policy Text Block] Contingencies and Commitments [Text Block] Commitments and Contingencies Disclosure [Text Block] Transportation and Storage Capacity [Member] TransportationAndStorageCapacity [Member] Transportation and storage capacity Change in benefit obligation: Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Measure: Measure [Axis] Reclassification to regulatory liability Reclassification Of Employee Benefit Cost / Credit To Regulatory Asset / Liability Reclassification of employee benefit cost / credit not collected in rates to regulatory asset / liability Stock-based compensation and related common stock issuances, net of tax Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture 3.35% Senior Unsecured Notes Due 2022 [Member] 3.35 Percent Senior Unsecured Notes Due 2022 [Member] 3.35% Senior Unsecured Notes Due 2022 [Member] Investments [Abstract] Investments [Abstract] Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized 2025 Defined Benefit Plan, Expected Future Benefit Payment, Year One Entity Emerging Growth Company Entity Emerging Growth Company Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Long-term Debt Long-Term Debt and Lease Obligation [Abstract] 2029 Long-Term Debt, Maturity, Year Five Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Accumulated benefit obligation Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation Transmission And Gulf Of America [Member] Transmission And Gulf Of America [Member] Transmission & Gulf of America Segment [Member] Equity Component [Domain] Equity Component [Domain] Preferred Stock, Par or Stated Value Per Share Preferred Stock, Par or Stated Value Per Share Contract With Customer, Liability [Line Items] Contract With Customer, Liability [Line Items] [Line Items] for Contract With Customer, Liability [Table] Stock Options Outstanding, Weighted Average Remaining Contractual Life Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual Term Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Debt Securities, Trading, and Equity Securities, FV-NI Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Entity Shell Company Entity Shell Company Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code 2028 Defined Benefit Plan, Expected Future Benefit Payment, Year Four SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Commodity Derivative Contract Risk [Axis] Commodity Derivative Contract Risk [Axis] Commodity Derivative Contract Risk Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Statement [Table] Statement [Table] Measurement Frequency [Domain] Measurement Frequency [Domain] Schedule of Variable Interest Entities [Table Text Block] Schedule of Variable Interest Entities [Table Text Block] Consolidation Items [Domain] Consolidation Items [Domain] Cash payments for interest (net of amounts capitalized) Interest Paid, Excluding Capitalized Interest, Operating Activities Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] Payments to Acquire Productive Assets Payments to Acquire Productive Assets Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Total current assets Current assets Assets, Current Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Site Contingency, Loss Exposure in Excess of Accrual, Best Estimate Site Contingency, Loss Exposure in Excess of Accrual, Best Estimate Income Tax Expense (Benefit), Continuing Operations [Abstract] Income Tax Expense (Benefit), Continuing Operations [Abstract] Options Exercisable at Period End Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number 2027 Long-Term Debt, Maturity, Year Three 4.8 Percent Senior Unsecured Notes Due 2029 4.8 Percent Senior Unsecured Notes Due 2029 [Member] 4.8 Percent Senior Unsecured Notes Due 2029 Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Performance Obligation Source [Axis] Performance Obligation Source [Axis] Performance Obligation Source [Axis] Employer contributions Defined Benefit Plan, Plan Assets, Contributions by Employer Commitments for construction and acquisition of property, plant, and equipment Unrecorded Unconditional Purchase Obligation Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Other Intangible Assets [Member] Other Intangible Assets [Member] Provision (Benefit) for Income Taxes [Text Block] Income Tax Disclosure [Text Block] Lessee, Operating Lease, Liability, Payments, Due Year Four Lessee, Operating Lease, Liability, to be Paid, Year Four Capital Addition Purchase Commitments [Member] Capital Addition Purchase Commitments [Member] Accrual for Taxes Other than Income Taxes, Current Accrual for Taxes Other than Income Taxes, Current Settlements Defined Benefit Plan, Benefit Obligation, Payment for Settlement Regulatory liabilities, deferred income, and other [Member] Other Noncurrent Liabilities [Member] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Cash flows from revolving credit facility and commercial paper program [Policy Text Block] Debt, Policy [Policy Text Block] Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Discount Rate, Percent Regulatory Liability, Deferred For Future Rate Treatment Regulatory Liability, Deferred For Future Rate Treatment Regulatory Liability, Deferred for Future Rate Treatment Discovery Producer Services LLC [Member] Discovery Producer Services LLC [Member] Discovery Producer Services LLC [Member] Levelized Depreciation Levelized Depreciation [Member] Levelized depreciation Net cash provided (used) by financing activities Net cash provided (used) by financing activities Net Cash Provided by (Used in) Financing Activities Proceeds from dispositions of equity-method investments (Note 8) Proceeds from Sale of Equity Method Investments Credit Facility [Axis] Credit Facility [Axis] Other Capitalized Property Plant and Equipment [Member] Other Capitalized Property Plant and Equipment [Member] Long-term debt, including current portion Long-Term Debt, Fair Value Impact of nontaxable noncontrolling interests Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount Loss Contingencies by Nature of Contingency [Axis] Loss Contingency Nature [Axis] Entity Registrant Name Entity Registrant Name Dispositions – net Payments To Retire Proceeds From Sale Of Property Plant And Equipment The net cash outflow or inflow from the retirement or sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Depreciation and amortization expenses Depreciation and amortization Depreciation, Depletion and Amortization Depreciation, Depletion and Amortization Unusual or Infrequent Item [Domain] Unusual or Infrequent Item, or Both [Domain] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] Net actuarial loss from settlements Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax State Deferred State and Local Income Tax Expense (Benefit) Fair Value as of Grant Date Award Grant Date Fair Value Noncurrent assets Assets for Plan Benefits, Defined Benefit Plan Affiliated Entity Affiliated Entity [Member] Total assets and equity method investments by reporting segment [Table Text Block] Reconciliation of Assets from Segment to Consolidated [Table Text Block] Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] Environmental Restoration Costs Environmental Restoration Costs [Member] Aux Sable Liquid Products Inc And Aux Sable Liquid Products LP And Aux Sable Midstream LLC Aux Sable Liquid Products Inc And Aux Sable Liquid Products LP And Aux Sable Midstream LLC [Member] Aux Sable Liquid Products Inc And Aux Sable Liquid Products LP And Aux Sable Midstream LLC Principles of consolidation [Policy Text Block] Consolidation, Policy [Policy Text Block] Dividends and distributions paid to noncontrolling interests Payments of Ordinary Dividends, Noncontrolling Interest Restatement Determination Date: Restatement Determination Date [Axis] 4% Senior Unsecured Notes Due 2028 [Member] 4 Percent Senior Unsecured Notes Due 2028 [Member] 4% Senior Unsecured Notes Due 2028 [Member] Title of 12(b) Security Title of 12(b) Security Common stock ($1 par value; 1,470 million shares authorized at December 31, 2024 and December 31, 2023; 1,258 million shares issued at December 31, 2024 and 1,256 million shares issued at December 31, 2023) Common Stock, Value, Issued DocumentFinStmtErrorCorrectionFlag Document Financial Statement Error Correction [Flag] Expected total plans contribution, approximate Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Contract with Customer, Liability, Increase (Decrease) for Contract Acquired in Business Combination Contract with Customer, Liability, Increase (Decrease) for Contract Acquired in Business Combination Amounts recognized in the Consolidated Balance Sheet: Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] Balance at beginning of year Balance at end of year Asset Retirement Obligation Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Regulatory Assets, Noncurrent Regulatory Asset, Noncurrent Contract With Customer, Asset [Table] Contract With Customer, Asset [Table] Contract With Customer, Asset Regulatory Liability, Current Regulatory Liability, Current Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Other Deferred Tax Assets, Other Accrued Liabilities, Current [Abstract] Accrued Liabilities, Current [Abstract] Property, Plant and Equipment, Plant Acquisition Adjustments for Intangible Utility Plants Public Utilities, Property, Plant and Equipment, Plant Acquisition Adjustments for Intangible Utility Plants Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Net Cash Provided by (Used in) Financing Activities [Abstract] Concentration Risk [Line Items] Concentration Risk [Line Items] 2029 Defined Benefit Plan, Expected Future Benefit Payment, Year Five Preferred stock ($1 par value; 30 million shares authorized at December 31, 2024 and December 31, 2023; 35 thousand shares issued at December 31, 2024 and December 31, 2023) Preferred Stock, Value, Issued State income taxes (net of federal benefit) Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Regulatory Liabilities Total regulatory liabilities Regulatory Liability Approximate Amortization Period Of Net Actuarial Gain Loss Approximate Amortization Period Of Net Actuarial Gain Loss1 Amortization period of net actuarial gain (loss) which is approximately the participants' average remaining future years of service. Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Total gross deferred income tax liabilities Deferred Tax Liabilities, Gross Net income (loss) available to common stockholders - Basic Earnings Per Share, Basic Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Operating Lease, Payments Operating Lease, Payments Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Federal settlements Effective Income Tax Rate Reconciliation, Tax Settlement, Domestic, Amount Federal loss carryovers Deferred Tax Assets, Operating Loss Carryforwards, Domestic Ownership [Domain] Ownership [Domain] Northeast JV [Member] Northeast JV [Member] Northeast JV [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Property, plant, and equipment [Policy Text Block] Property, Plant and Equipment, Policy [Policy Text Block] 4% Senior Unsecured Notes Due 2027 [Member] 4 Percent Senior Unsecured Notes Due 2027 [Member] 4% Senior Unsecured Notes Due 2027 [Member] Total current liabilities Total current liabilities Current liabilities Liabilities, Current 5.1% Senior Unsecured Notes Due 2045 [Member] 5.1 Percent Senior Unsecured Notes Due 2045 [Member] 5.1% Senior Unsecured Notes Due 2045 [Member] Distributions from equity-method investees (Note 8) Proceeds from Equity Method Investment, Distribution Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Finite-Lived Intangible Asset, Expected Amortization, Year One Credit facility loans Credit facility, loans outstanding Long-Term Line of Credit Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Central Hub Risk Central Hub Risk [Member] Central Hub Risk Business Combination Acquisition Related Costs Cumulative Business Combination Acquisition Related Costs Cumulative This element represents cumulative acquisition-related costs incurred to effect a business combination which costs have been expensed. Net actuarial gain (loss) arising during the year, net of taxes of $(24), $—, and $1 in 2024, 2023, and 2022, respectively Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Proceeds from Legal Settlements Proceeds from Legal Settlements Derivative Liability, Fair Value, Gross Asset Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Investing Activities [Text Block] Equity Method Investments and Joint Ventures Disclosure [Text Block] Investment Income Nonoperating Other Investment Income Nonoperating Other Other income from investments not considered a component of the entity's core operations. Discount rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Revenues Revenues Total revenues Revenues Oil and Gas, Gas-Balancing Arrangement Oil and Gas, Gas-Balancing Arrangement [Policy Text Block] Equity-Based Compensation [Text Block] Share-Based Payment Arrangement [Text Block] Increase (Decrease) in Regulatory Assets Noncurrent Increase (Decrease) in Regulatory Assets Noncurrent The increase (decrease) during the reporting period in the value of other noncurrent assets that are created when regulatory agencies permits public utilities to defer costs to the balance sheet. Commingled investment funds - fixed income Commingled investment funds - fixed income [Member] Commingled investment funds - fixed income Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Fair Value, Concentration of Risk Fair Value, Concentration of Risk [Table Text Block] Entity Address, City or Town Entity Address, City or Town Proceeds from long-term debt Proceeds from Issuance of Long-Term Debt Transfers out of Level 3 Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 Leases [Policy Text Block] Lessee, Leases [Policy Text Block] Threshold For Market Related Value Threshold For Market Related Value Threshold For Market Related Value stated as a percentage of the fair value of plan assets as measured at the beginning of the year Changes in related accounts payable and accrued liabilities Increase Decrease In Accounts Payable And Accrued Liabilities Related To Capital Expenditures Incurred But Not Yet Paid The increase / decrease during the reporting period in future cash outflows to pay for purchases of fixed assets that have occurred. Derivative Asset, Fair Value, Gross Liability Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Equity-based compensation expense Share-Based Payment Arrangement, Expense Segment revenues [Line Items] Segment Reporting, Revenue Reconciling Item [Line Items] Public Utility Regulated or Unregulated Status [Axis] Regulation Status [Axis] Loss Contingencies [Table] Loss Contingencies [Table] Public Utilities, Allowance for Funds Used During Construction, Additions Public Utilities, Allowance for Funds Used During Construction, Additions Public Utilities, Allowance for Funds Used During Construction, Additions Gain on remeasurement of equity-method investments (Note 3) Gain on remeasurement of equity-method investment (Note 2) Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain Weighted average assumptions utilized to determine benefit obligations Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Finite-Lived Intangible Assets [Table Text Block] Business Acquisition [Axis] Business Acquisition [Axis] Property, Plant, and Equipment Property, Plant and Equipment, Net [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Series B Preferred Stock [Member] Series B Preferred Stock [Member] Revenue Recognition [Text Block] Revenue from Contract with Customer [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Purchases of treasury stock Purchases of treasury stock Treasury Stock, Value, Acquired, Cost Method Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Other, including accrued loss contingencies Other Accrued Liabilities, Current Debt Instrument, Unamortized Discount (Premium), Net Debt Instrument, Unamortized Discount (Premium), Net Status Of Gain (Loss) [Domain] Status Of Gain (Loss) [Domain] Status Of Gain (Loss) [Domain] Finite-Lived Intangible Assets, Amortization Expense, Year Five Finite-Lived Intangible Asset, Expected Amortization, Year Five Document Period End Date Document Period End Date Variable Interest Entity Ownership Percentage Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Contributions from noncontrolling interests Proceeds from Noncontrolling Interests Nonregulated [Member] Unregulated Operation [Member] Lessee, Operating Lease, Liability, Payments, Due Lessee, Operating Lease, Liability, to be Paid DJ Basin Acquisitions DJ Basin Acquisitions [Member] DJ Basin Acquisitions, comprised of Cureton Acquisition and RMM Acquisition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Threshold For Amortization Of Unrecognized Actuarial Gains Losses Threshold For Amortization Of Unrecognized Actuarial Gains Losses Threshold For Amortization Of Unrecognized Actuarial Gains Losses, stated as a percentage of the greater of the benefit obligation or the market-related value of plan assets. Insider Trading Arrangements [Line Items] Income (loss) from discontinued operations (Note 1) Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Other current assets and deferred charges [Member] Derivative assets [Member] Other Current Assets [Member] Other current assets and deferred charges Increase (Decrease) in Other Current Assets Increase (Decrease) in Other Current Assets Lessee, Operating Lease, Liability, Payments, Due Year Three Lessee, Operating Lease, Liability, to be Paid, Year Three Related Party Transaction, Purchases from Related Party Related Party Transaction, Purchases from Related Party Accumulated benefit obligation Defined Benefit Plan, Accumulated Benefit Obligation Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Contract with Customer, Liability, Revenue Recognized Contract with Customer, Liability, Revenue Recognized Contract With Customer, Liability [Table] Contract With Customer, Liability [Table] Contract with Customer, Liability [Table] Accounts and Financing Receivable, after Allowance for Credit Loss, Current Accounts and Financing Receivable, after Allowance for Credit Loss, Current Document Transition Report Document Transition Report Customer [Domain] Customer [Domain] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Entity Current Reporting Status Entity Current Reporting Status Retained Deficit Retained Earnings Retained Earnings [Member] Asset Acquisition [Domain] Asset Acquisition [Domain] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Other Operating Income Other Operating Income Nonvested Restricted Stock Units [Member] Restricted Stock Units (RSUs) [Member] Amounts recognized in Accumulated other comprehensive income (loss): Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] Derivative Nonmonetary Notional Amount Net Long Short Position Volume Derivative Nonmonetary Notional Amount Net Long Short Position Volume Derivative nonmonetary notional amount net long short position volume Executive Category: Executive Category [Axis] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Schedule of Components of Provision (benefit) for income taxes [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Repayments of Other Long-Term Debt Repayments of Other Long-Term Debt Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Contributions in aid of construction Proceeds from Contribution in Aid of Construction, Investing Activity Letters of credit [Member] Letter of Credit [Member] Company Selected Measure Name Company Selected Measure Name Other Liabilities