75000 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - Condensed Consolidated Balance Sheets (Unaudited) link:presentationLink link:calculationLink link:definitionLink 75030 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 75040 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) link:presentationLink link:calculationLink link:definitionLink 995455 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 995465 - Disclosure - Revenue Recognition link:presentationLink link:calculationLink link:definitionLink 995475 - Disclosure - Balance Sheet Components link:presentationLink link:calculationLink link:definitionLink 995485 - Disclosure - Fair Value of Financial Instruments link:presentationLink link:calculationLink link:definitionLink 995495 - Disclosure - Risk Management link:presentationLink link:calculationLink link:definitionLink 995505 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 995515 - Disclosure - Shareholders' Equity link:presentationLink link:calculationLink link:definitionLink 995525 - Disclosure - Contingencies link:presentationLink link:calculationLink link:definitionLink 995535 - Disclosure - Guarantees link:presentationLink link:calculationLink link:definitionLink 995545 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 995555 - Disclosure - Segment Reporting link:presentationLink link:calculationLink link:definitionLink 995565 - Disclosure - Basis of Presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 995575 - Disclosure - SEC Schedule, Article 12-09, Valuation and Qualifying Accounts (Policies) link:presentationLink link:calculationLink link:definitionLink 995585 - Disclosure - Revenue Recognition (Tables) link:presentationLink link:calculationLink link:definitionLink 995595 - Disclosure - Balance Sheet Components (Tables) link:presentationLink link:calculationLink link:definitionLink 995605 - Disclosure - Fair Value of Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 995615 - Disclosure - Risk Management (Tables) link:presentationLink link:calculationLink link:definitionLink 995625 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 995635 - Disclosure - Shareholders' Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 995645 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 995655 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 995665 - Disclosure - Basis of Presentation (Details) link:presentationLink link:calculationLink link:definitionLink 995675 - Disclosure - Revenue Recognition - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 995685 - Disclosure - Balance Sheet Components - Schedule of Allowance for Uncollectible Accounts Activity (Details) link:presentationLink link:calculationLink link:definitionLink 995695 - Disclosure - Balance Sheet Components - Schedule of Other Current Assets (Details) link:presentationLink link:calculationLink link:definitionLink 995705 - Disclosure - Balance Sheet Components - Schedule of Electric Utility Plant, Net (Details) link:presentationLink link:calculationLink link:definitionLink 995715 - Disclosure - Balance Sheet Components - Regulatory Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 995725 - Disclosure - Balance Sheet Components - Schedule of Other Accrued Expenses and Other Current Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 995735 - Disclosure - Balance Sheet Components Pension and Other Postretirement Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 995745 - Disclosure - Balance Sheet Components (Details) link:presentationLink link:calculationLink link:definitionLink 995755 - Disclosure - Fair Value of Financial Instruments Schedule of Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 995765 - Disclosure - Fair Value of Financial Instruments Fair Value Options Quantitative Disclosure (Details) link:presentationLink link:calculationLink link:definitionLink 995775 - Disclosure - Fair Value of Financial Instruments Fair Value Unobservable Input Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 995785 - Disclosure - Fair Value of Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 995795 - Disclosure - Risk Management - Schedule of PGE's Assets and Liabilities from Price Risk Management Activities (Details) link:presentationLink link:calculationLink link:definitionLink 995805 - Disclosure - Risk Management - Schedule of PGE's Net Volumes related to Assets and Liabilities from Price Risk Management Activities (Details) link:presentationLink link:calculationLink link:definitionLink 995815 - Disclosure - Risk Management - Schedule of Net Realized and Unrealized Losses (Gains) on Derivative Transactions Not Designated as Hedging Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 995825 - Disclosure - Risk Management - Schedule of Future Year Net Unrealized Losses related to PGE's Derivative Activities (Details) link:presentationLink link:calculationLink link:definitionLink 995835 - Disclosure - Risk Management (Details) link:presentationLink link:calculationLink link:definitionLink 995845 - Disclosure - Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) link:presentationLink link:calculationLink link:definitionLink 995855 - Disclosure - Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 995865 - Disclosure - Shareholders' Equity - Schedule of Shareholders' Equity (Details) link:presentationLink link:calculationLink link:definitionLink 995875 - Disclosure - Shareholders' Equity (Details) link:presentationLink link:calculationLink link:definitionLink 995885 - Disclosure - Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 995895 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 995905 - Disclosure - Segment Information (Details) link:presentationLink link:calculationLink link:definitionLink 995915 - Disclosure - Segment Information - Schedule of Segment Reporting Information, by Segment (Details) link:presentationLink link:calculationLink link:definitionLink 995925 - Disclosure - Segment Information - Certain Additional Financial Information Relating to Single Business Segment (Details) link:presentationLink link:calculationLink link:definitionLink Capital Revenue Requirement Capital revenue requirement. Capital revenue requirement Regulated Operating Revenue, Electric, Non-Nuclear Subtotal Retirement Plan Type [Axis] Retirement Plan Type [Axis] Net gain or loss recognized in the statement of income for derivative instruments related to price risk management activities offset by regulatory accounting. Net gain or loss recognized in the statement of income offset by regulatory accounting Net gain or (loss) recognized in the statement of income offset by regulatory accounting Net gain or (loss) recognized in the statement of income offset by regulatory accounting Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. Derivative Liabilities, Total Total derivative liabilities The aggregate fair value of assets that would be required to be posted as collateral for derviative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period. Collateral Aggregate Fair Value Collateral aggregate fair value Asset Acquisition Bridge Facility From Bank Asset acquisition bridge facility from bank Bridge facility from bank Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Carrying amount as of the balance sheet date of the liability arising from commodity contracts related to natural gas which are expected to be settled after a year or beyond the normal operating cycle, if longer. Commodity Contract Liability, Noncurrent, Natural Gas Natural gas Preferred Stock, Shares Issued Preferred stock, issued Derivative Asset, Noncurrent Total noncurrent derivative assets Credit Risk Contract [Member] Credit Risk Contract Increase (Decrease) in Accounts Payable Accounts payable and accrued liabilities Long-Term Debt, Excluding Current Maturities Long-term debt, net of current portion Guarantees [Text Block] Guarantees Equity [Abstract] Shareholders' Equity: Entity Current Reporting Status Entity Current Reporting Status Loss Contingency, Damages Sought, Value Loss Contingency, Damages Sought, Value Remediation construction costs Other Commitment Total Commodity [Domain] Commodity [Domain] [Domain] for Commodity [Axis] Noncurrent Assets, Commodity Contracts: [Abstract] Noncurrent Assets, Commodity Contracts: [Abstract] Noncurrent Assets, Commodity Contracts: [Abstract] Asset Acquisition Number Of Customers Acquired Asset acquisition number of customers acquired. Number of customers acquired Operating Expenses [Abstract] Operating expenses: Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Commodity contracts: [Abstract] Current Assets, Commodity Contracts: [Abstract] Commodity contracts: Current Assets, Commodity Contracts: Common Stock, Shares Authorized Common stock, shares authorized Electricity Financial Futures Price Per Unit Electricity financial futures price per unit. Electricity financial futures, price per unit The company elects to report gross on the balance sheet the positive and negative exposures resultinig from derivative instruments. Gross Reporting of Positive and Negative Exposures Related to Derivative Instruments [Policy Text Block] Gross Reporting of Positive and Negative Exposures Related to Derivative Instruments The deferral, which can be either a positive or negaitive amount depending on whether a collection from or refund to customers results, of the amounts recorded in net income for energy useage by customers on a weather adjusted basis that is different from base rates as determined under the Company's decoupling mechanism, expected to be recovered or refunded in future periods. Decoupling Mechanism Deferrals, Net Alternative revenue programs Product and Service [Axis] Product and Service [Axis] Document Fiscal Period Focus Document Fiscal Period Focus Issuance costs pursuant to equity agreements Issuance costs pursuant to equity agreements. Entity Shell Company Entity Shell Company Revenues, Net of Interest Expense [Abstract] Interest expense, net: Unrealized Gain (Loss) on Derivatives and Commodity Contracts [Abstract] Commodity contracts: Carrying amount as of the balance sheet date of the asset arising from commodity contracts related to natural gas which are expected to be settled within a year or normal operating cycle, if longer. Commodity Contract Asset, Current, Natural Gas Natural gas Litigation Settlement, Fee Expense Litigation Settlement, Fee Expense Investigation-related costs Subsidiary, Sale of Stock [Line Items] Common Stock, Shares, Issued Common stock, shares issued Details of Certain Balance Sheet Accounts Details of Certain Balance Sheet Accounts Disclosure [Text Block] Balance Sheet Components Asset Class [Domain] Statement [Table] Statement [Table] Regulatory Liability [Axis] Regulatory Liability [Axis] Increase (Decrease) in Receivables Accounts receivable, net Statement [Line Items] Statement [Line Items] Entity Filer Category Entity Filer Category Reclassification, Comparability Adjustment [Policy Text Block] Reclassifications Natural Gas [Member] Natural Gas [Member] Liabilities and Equity Total liabilities and shareholders' equity Long-Lived Tangible Asset [Axis] Property, Plant and Equipment, Type [Axis] Public Utilities, Property, Plant and Equipment, Net Electric utility plant, net Electric utility plant, net Derivative [Line Items] Derivative [Line Items] Cash and Cash Equivalents, Fair Value Disclosure Cash equivalents Net amount associated with the reporting entity's derivative instruments recorded as of the balance sheet date having arisen from price risk management activities related to foreign currency. Volume Related to Derivative Instruments Held at Balance Sheet Date, Foreign Currency Foreign currency Allowed return on equity percentage on deferred storm costs Allowed return on equity percentage on deferred storm costs. US Government Securities, at Carrying Value Domestic government, Debt securities Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Federal statutory tax rate Carrying amount as of the balance sheet date of the asset arising from commodity contracts related to purchases or sales of electricity. Commodity Contract Asset, Electricity Electricity Price Risk Derivatives [Line Items] Commodity [Axis] Commodity [Axis] Commodity [Axis] Other Noncash Income (Expense) Other non-cash income and expenses, net Effective Income Tax Rate Reconciliation, Percent Effective tax rate Effective tax rate Realized and unrealized gains and losses, net on commodity contracts related to natural gas not designated as hedging instruments included in purchased power and fuel expense in the statement of income. Realized and Unrealized Gains and Losses, Net, Commodity Contracts, Natural Gas Natural Gas Accounts Receivable, Allowance for Credit Loss, Recovery Recoveries Authorized Short-Term Debt Authorized Short-Term Debt Authorized short-term debt Other Current Liabilities - Other Other Current Liabilities - Other Other Assets, Noncurrent [Abstract] Noncurrent assets: Accounts Receivable, Allowance for Credit Loss Accounts Receivable, Allowance for Credit Loss Balance as of end of period Balance as of beginning of period Electricity [Member] Electricity [Member] Debt Instrument, Interest Rate During Period Debt, interest rate Wildfire mitigation Wildfire mitigation [Member] Wildfire mitigation Wildfire Mitigation [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Regulatory Asset, Current Regulatory Assets, Current Regulatory assets-current Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Payments to Acquire Investments to be Held in Decommissioning Trust Fund Purchases of Nuclear decommissioning trust securities Purchases of Nuclear decommissioning trust securities Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted Increase (Decrease) in Other Operating Assets and Liabilities, Net Other working capital items, net Earnings Per Share, Basic Basic Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue Repayments of Long-Term Debt Proceeds from issuance of long-term debt Payments on long-term debt Payments on long-term debt Retirement Benefits [Text Block] Schedule of Pension and Other Postretirement Benefits Disclosure Debt, Policy [Policy Text Block] Long-term debt Retirement Plan Type [Domain] Retirement Plan Type [Domain] Liabilities, Current Total current liabilities Net volume related to the reporting entity's derivative instruments as of the balance sheet date having arisen from price risk management activities. Volume Related to Derivative Instruments Held at Balance Sheet Date, Commodity Contracts, Electricity Electricity Regulatory Asset, Noncurrent Regulatory assets - noncurrent Regulatory assets-noncurrent Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: PacifiCorp [Member] PacifiCorp. PacifiCorp Current Liabilities, Commodity Contracts: [Abstract] Current Liabilities, Commodity Contracts: [Abstract] Current Liabilities, Commodity Contracts: [Abstract] Equity, Attributable to Parent [Abstract] Shareholders' Equity: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of Changes in Fair Value of Net Liabilities from Price Risk Management Activities Entity Small Business Entity Small Business Storm Recovery Docket [Member] Storm Recovery Docket [Member] Storm Recovery Docket Retained Earnings (Accumulated Deficit) Retained earnings Guarantees, Indemnifications and Warranties Policies [Policy Text Block] Guarantees, Indemnifications and Warranties Subsidiary or Equity Method Investee, Sale of Stock, Type [Table] Sale of Stock, Price Per Share Share price per share Carrying amount as of the balance sheet date of the asset arising from commodity contracts related to electricity which are expected to be settled after a year or beyond the normal operating cycle, if longer. Commodity Contract Asset, Noncurrent, Electricity Electricity Payments of Dividends Dividends paid Service Area Population Service Area Population Service area population Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction, Total Derivative asset amount offset against collateral Weighted Average Number of Shares Outstanding, Diluted, Adjustment Dilutive effect of potential common shares Amendment Flag Amendment Flag RCE mechanism docket approved recovery amount in deferred costs RCE mechanism docket approved recovery amount in deferred costs. Taxes, Miscellaneous Taxes other than income taxes Product and Service [Domain] Product and Service [Domain] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Allowance for Funds Used During Construction, Capitalized Interest Allowance for borrowed funds used during construction Allowance for borrowed funds used during construction Allowance for borrowed funds used during construction Proceeds from Sale, Maturity and Collection of Investments Sales of Nuclear decommissioning trust securities Regulatory Asset [Line Items] Regulatory Assets and Liabilities [Line Items] Liabilities and Equity [Abstract] LIABILITIES AND EQUITY Entity Address, Postal Zip Code Entity Address, Postal Zip Code Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash provided by operating activities Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description Common Stock [Member] Common Stock [Member] Regulated and Unregulated Operating Revenue Other operating revenue Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of PGE's Assets and Liabilities from Price Risk Management Activities Number of Retail Customers Includes residential, commercial and industrial. Number of retail customers Portion at Fair Value Measurement [Member] [Default] Portion at Fair Value Measurement [Member] Entity Address, Address Line One Entity Address, Address Line One Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Financial Instruments, Owned, at Fair Value Total Earnings Per Share [Abstract] Earnings per share: Loss Contingency Accrual Loss Contingency Accrual, Ending Balance Loss Contingency Accrual, Beginning Balance Estimated low end of share of liability StormCosts - Jan 2024 StormCosts - Jan 2024 [Member] StormCosts - Jan 2024 Supplemental Cash Flow Information [Abstract] Supplemental cash flow information is as follows: Margin Deposit Assets Margin deposits Credit Derivatives Contract Type [Domain] Credit Derivatives Contract Type [Domain] Joseph R. Trpik Joseph R. Trpik [Member] Joseph R. Trpik. Public Utility Commission of Oregon [Member] Public Utility Commission of Oregon. OPUC [Member] Debt Instrument, Redemption, Period [Axis] Document Type Document Type Trust [Domain] Trust [Domain] Trust [Domain] Income Taxes Paid, Net Cash received for income taxes, net Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Entity Central Index Key Entity Central Index Key Prime Rate [Member] Carrying amount as of the balance sheet date of the liability arising from commodity contracts related to electricity which are expected to be settled within a year or the normal operating cycle, if longer. Commodity Contract Liability, Current, Electricity Electricity Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation Change in cash and cash equivalents Subsequent Event Type [Domain] Industrial [Member] Industrial [Member] Industrial [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Shares included in the calculation of diluted EPS Service Area Sq Miles Approximate square miles of service area. Service area sq miles Money Market Funds, at Carrying Value Money market funds other current assets [Line Items] [Line Items] other current assets [Line Items] [Line Items] Other Current Assets [Line Items] Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Notes Payable to Banks [Member] Earnings test resulted reduction of previously deferred amounts Earnings test resulted reduction of previously deferred amounts. Schedule of Price Risk Derivatives [Table Text Block] Schedule of Future Year Net Unrealized Losses related to PGE's Derivative Activities Schedule of Stockholders Equity [Table Text Block] Schedule of Shareholders' Equity Maximum Value Of Shares To Be Issued Under ATM Program Maximum value of shares to be issued under ATM program Maximum value of shares to be issued under ATM program of its common stock through an at-the-market offering program, including an equity forward sales component. Derivative [Table] Derivative [Table] Schedule of Derivative Instruments [Table Text Block] Schedule of PGE's Net Volumes related to Assets and Liabilities from Price Risk Management Activities Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Current Fiscal Year End Date Current Fiscal Year End Date Contingencies [Abstract] Contingencies [Abstract] Contingencies [Abstract] Regulatory Liability [Domain] Regulatory Liability [Domain] Document Quarterly Report Document Quarterly Report Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Right to reclaim cash collateral Litigation Case [Domain] Litigation Case [Domain] Operating expense recovery from base rates amount Operating Expense Recovery From Base Rates Amount Operating expense recovery from base rates amount. Fair Value, by Balance Sheet Grouping [Table] Entity Address, State or Province Entity Address, State or Province Collateral Already Posted, Aggregate Fair Value Aggregate fair value in collateral Line of Credit Facility, Remaining Borrowing Capacity Line of Credit Facility, Remaining Borrowing Capacity Asset Acquisition [Domain] Preferred Stock, Shares Outstanding Preferred stock, outstanding Carrying amount as of the balance sheet date of the liability arising from commodity contracts related to electricity which are expected to be settled after a year or beyond the normal operating cycle, if longer. Commodity Contract Liability, Noncurrent, Electricity Electricity Equity Forward Sale Agreement [Member] Equity forward sale agreement. Equity Forward Sale Agreement Stock settlement amount Stock Settlement Amount Stock settlement amount. RCE mechanism docket approved deferred costs shared at a level of percentage RCE mechanism docket approved deferred costs shared at a level of percentage. Asset, Held-in-Trust, Noncurrent Non-qualified benefit plan trust Comprehensive Income Comprehensive Income, Policy [Policy Text Block] Long-Term Debt, Fair Value Long-term Debt, Fair Value Subsequent Event [Member] Subsequent Events Other Commitment, to be Paid, Year Five 2030 Fnancial swaps - electricity Fnancial swaps - electricity Financial swaps - electricity Other Assets, Noncurrent Other noncurrent assets Carrying amount as of the balance sheet date of the liability arising from the commodity contracts related to natural gas which are expected to be settled within a year or normal operating cycle, if longer. Commodity Contract Liability, Current, Natural Gas Natural gas Decommissioning Fund Investments Nuclear decommissioning trust Interest Expense, Debt Interest expense Available-for-Sale Securities [Member] Assets [Member] Maria M. Pope [Member] Maria M. Pope. Maria M. Pope AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Loss [Member] Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral, Total Gross amounts included as price risk management liabilities Carrying amount as of the balance sheet date of the asset arising from commodity contracts related to purchases or sales of natural gas. Commodity Contract Asset, Natural gas Natural gas Other Income, Nonoperating [Abstract] Other income, net: Entity Number of Employees Revolving credit facility and commercial paper program [member] Revolving credit facility and commercial paper program. Revolving Credit Facility and Commercial Paper Program [Member] Preferred Stock, Value, Issued Preferred stock, no par value, 30,000,000 shares authorized; none issued and outstanding as of June 30, 2026 and December 31, 2025 StormCosts - RCE StormCosts - RCE [Member] StormCosts - RCE Minimum [Member] Low [Member] Minimum [Member] Financial Instrument [Axis] Eligible Item or Group for Fair Value Option [Axis] Assets, Current [Abstract] Current assets: Unregulated Operating Revenue Wholesale revenues Commercial [Member] Commercial [Member] Commercial [Member] Amortization of Intangible Assets Amortization of Intangible Assets Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Segment Reporting [Abstract] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Business Combination [Policy Text Block] Pending Acquisition Liabilities, Current [Abstract] Current liabilities Current liabilities: Regulatory Asset [Axis] Regulatory Asset [Axis] Increase (Decrease) in Margin Deposits Outstanding Margin deposits Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable, net Regulatory Liability, Current Regulatory Liability, Current Regulatory liabilities—current Reclassification Of Amounts From Other Net To Contribution To Pension And Other Postretirement Plans Reclassification of amounts from other net to contribution to pension and other postretirement plans. Reclassification of amounts from other net to contribution to pension and other postretirement plans Commitments and Contingencies Commitments and contingencies (see notes) Realized and unrealized gains and losses, net on commodity contracts related to electricity not designated as hedging instruments included in purchased power and fuel expense in the statement of income. Realized and Unrealized Gains and Losses, Net, Commodity Contracts, Electricity Electricity Defined Benefit Plan, Service Cost Service cost Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Issuances of shares pursuant to equity-based plans Issuances of shares pursuant to equity-based plans Forecast [Member] Forecast [Member] Short-Term Debt Short-Term Debt, Total Short-term debt Common Stock, No Par Value Common stock, no par value RCE deferred RCE deferred RCE deferred. Debt Instrument, Covenant Ratio Debt Instrument, Covenant Ratio Debt Instrument, Covenant Description Finance Lease, Liability, Current Current portion of finance lease obligation Due In 2055 [Member] Due In 2055 [Member] Due In 2055 [Member] Liabilities, Noncurrent [Abstract] Noncurrent liabilities: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Long-Term Debt, Type [Domain] Loss Contingencies [Table] Loss Contingencies [Table] Weighted Average Number of Shares Outstanding, Basic Basic Weighted Average Number of Shares Outstanding, Basic SOFR adjustment rate of basis points applicable margin Debt Instrument Basis Spread On Variable Rate Applicable Margin Debt instrument basis spread on variable rate applicable margin. Scenario [Axis] Scenario [Axis] Revenue Requirement Of Capital Placed In Service Revenue requirement of capital placed in service. Revenue requirement of capital placed in service Cash Surrender Value, Fair Value Disclosure Cash Surrender Value, Fair Value Disclosure Insurance contracts, at cash surrender value Regulated Operating Revenue Total retail revenues Regulatory assets Regulatory Asset Regulatory Asset, Total Operations And Maintenance Expense Operations and maintenance expense. Operations and maintenance expense Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation Long-Lived Tangible Asset [Domain] Property, Plant and Equipment, Type [Domain] debt securities - domestic government debt securities - domestic government Debt securities - domestic government Long-Term Debt Long-term Debt Term loan outstanding Long-Term Debt, Total Variable Rate [Domain] Derivatives Not Designated as Hedging Instruments [Table Text Block] Schedule of Net Realized and Unrealized Losses (Gains) on Derivative Transactions Not Designated as Hedging Instruments At The Market Offering Program [Member] At the Market Offering Program. At-the-Market Offering Program Equity Method Investments Equity method investments Carrying amount as of the balance sheet date of the asset arising from commodity contracts related to natural gas which are expected to be settled after a year or beyond the normal operating cycle, if longer. Commodity Contract Asset, Noncurrent, Natural Gas Natural Gas First Mortgage Bonds [Member] First Mortgage Bonds. First Mortgage Bonds [Member] Use of Estimates Use of Estimates, Policy [Policy Text Block] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Trust Investments [Axis] Trust [Axis] Trust [Axis] Fair Value Disclosures [Text Block] Fair Value of FInancial Instruments Net Liabilities From Price Risk Management Activities Classified as Level 3 Net Liabilities From Price Risk Management Activities Classified As Level 3 Balance as of the end of the period Balance as of the beginning of the period Collateral already posted, aggregate fair value in letter of credit Collateral already posted, aggregate fair value in letter of credit. Aggregate fair value in letters of credit Stock Granted During Period Adjustment Share based Compensation Stock granted during period adjustment share based compensation. Stock-based compensation Power Purchase Agreement [Member] Power purchase agreement. PPA [Member] Other accrued revenues, net Other Accrued Revenues Net Other accrued revenues, net. Debt Instrument, Name [Domain] Regulatory Asset [Domain] Regulatory Asset [Domain] Other Liabilities Disclosure [Text Block] Schedule of Other Accrued Expenses and Other Current Liabilities Assets [Member] Assets [Member] Other Assets, Current Other current assets Other current assets Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Estimate of Transaction Price Alternative revenue programs, net of amortization Regulatory Liability Regulatory Liability, Total Regulatory Liabilities Number of shares in connection with underwriters exercise of option to purchase additional shares Number of shares in connection with underwriters exercise of option to purchase additional shares. Increase (Decrease) in Other Operating Assets Other, net Expects equity commitments to finance acquisition Expects Equity Commitments To Finance Acquisition Expects equity commitments to finance acquisition. Interest Expense, Operating and Nonoperating Interest expense, net Total interest expense, net 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] Basis of Presentation [Abstract] Basis of Presentation [Abstract] Basis of Presentation [Abstract] Credit Facility [Axis] StormCosts - RCE StormCosts - RCE. StormCost - RCE [Member] Pension Plan [Member] Pension Plan [Member] Gain (Loss) from Price Risk Management Activity Gain (Loss) from Price Risk Management Activity Net realized gains Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 Entity Address, City or Town Entity Address, City or Town Schedule of Regulatory Assets and Liabilities [Text Block] Schedule of Regulatory Assets and Liabilities 2027 Other Commitments Due In Second Year Other commitments due in second year. Other Commitment, to be Paid, Year One 2026 2026 Security Exchange Name Security Exchange Name Deferred Regulatory Liability in Balancing Account Deferred Regulatory Liability in Balancing Account Deferred regulatory liability in balancing account Credit Facility [Domain] Long term debt, outstanding amount Long-Term Debt, Gross Property, Plant and Equipment, Gross Total cost Percentage of prudently incurred reliability contingency events cost Percentage of prudently incurred reliability contingency events cost. Public Utility Property, Plant, and Equipment [Table Text Block] Schedule of Public Utility Property, Plant, and Equipment Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before income tax expense Income before income tax expense Common Stock Including Additional Paid in Capital [Member] Common Stock Including Additional Paid in Capital [Member] Gain (Loss) on Disposition of Other Assets Gain (Loss) on Disposition of Other Assets Tax credit sales Tax credit sales Realized and Unrealized Gains and Losses, Net, Commodity Contracts Realized and Unrealized Gains and Losses, Net, Commodity Contract Net realized and unrealized losses/(gains) Corporate debt securities held in decommissioning trust assets Corporate debt securities held in decommissioning trust assets Corporate debt securities held in decommissioning trust assets Carrying amount as of the balance sheet date of the liabilities arising from commodity contracts related to purchases or sales of electricity. Commodity Contract Liabilities, Electricity Electricity Stockholders' Equity Note [Abstract] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation, Total Cash and cash equivalents Interest Paid, Excluding Capitalized Interest, Operating Activity Cash paid for interest, net of amounts capitalized Measurement Basis [Axis] Fair Value By Measurement Basis [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net, Total Assets, Current Total current assets Document Period End Date Document Period End Date Pension and Other Postretirement Plans Costs [Member] Pension and Other Postretirement Plans Costs [Member] Other Income and Expenses [Abstract] Other income: Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] upper range of costs upper range of costs upper range of costs Energy Related Inventory Inventories Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Direct Access customers [Member] Direct Access customers [Member] Direct Access customers [Member] Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Loss Contingency, Range of Possible Loss, Portion Not Accrued Loss Contingency, Range of Possible Loss, Portion Not Accrued Long-term operation and maintenance costs Other Commitment, to be Paid, Year Two 2027 SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Liabilities Total liabilities Reduction in previously deferred costs Reduction in previously deferred costs. Financial Instruments [Domain] Fair Value, Option, Eligible Item or Group [Domain] Natural gas financial swaps Natural gas financial swaps Natural gas financial swaps Other Current Liabilities [Table] Other Current Liabilities [Table] Other Current Liabilities [Table] Asset Retirement Obligations, Noncurrent Asset Retirement Obligations, Noncurrent, Total Asset retirement obligations Loss Contingency, Estimate of Possible Loss Loss Contingency, Estimate of Possible Loss Undiscounted estimated total cost Fire [Member] Fire Defined Benefit Plan, Expected Return (Loss) on Plan Assets Expected return on plan assets Other Regulatory Assets (Liabilities) [Member] Other Regulatory Assets [Member] Ceded Credit Risk, Collateralization [Axis] Ceded Credit Risk, Collateralization [Axis] Variable Rate [Axis] Dividends Payable, Current Accrued dividends payable Deferred Income Taxes and Other Tax Liabilities, Noncurrent Deferred income taxes Utilities Operating Expense, Purchased Power Purchased power and fuel Weighted Average Number of Shares Outstanding, Diluted Diluted Weighted Average Number of Shares Outstanding, Diluted Entity File Number Entity File Number Carrying amount as of the balance sheet date of the liabilities arising from commodity contracts related to purchases or sales of natural gas. Commodity Contract Liabilities, Natural gas Natural gas Collateral Already Posted, Aggregate Fair Value in Cash Collateral already posted, aggregate fair value in cash. Aggregate fair value in cash Cover [Abstract] Cover [Abstract] Operations And Maintenance Expense Recovery From Base Rates, Removed Amount Operations and maintenance expense recovery from base rates, removed amount. Operations and maintenance expense recovery from base rates, removed amount Disallowance for operating and maintenance costs Disallowance for operating and maintenance costs. Price risk management note. Price Risk Management Note [Abstract] Price Risk Management Note [Abstract] Fair values as of the balance sheet date for all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be settled after one year or normal operating cycle, if longer. Noncurrent Derivative Liabilities Total noncurrent derivative liabilities Prepaid Expense and Other Assets, Current Prepaid expenses Taxes Payable, Current Accrued taxes payable Environmental Restoration Costs [Member] Environmental Restoration Costs [Member] Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 Transfers out of Level 3 to Level 2 Fair values as of the balance sheet date for all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be settled within one year of the normal operating cycle, if longer. Current Derivative Liabilities Total current derivative liabilities Derivative, Net Liability Position, Aggregate Fair Value Aggregate fair value of derivative instruments Additional Fair Value Elements [Abstract] Additional Fair Value Elements [Abstract] Scenario [Domain] Scenario [Domain] Liability, Defined Benefit Pension Plan, Noncurrent Unfunded status of pension and postretirement plans Number of Operating Segments Number of operating segments Deferred Incremental Costs Deferred incremental costs. Sale of Stock [Domain] Segment Reporting Disclosure [Text Block] Segment Information General and Administrative Expense Administrative and other Revenue from Contract with Customer, Including Assessed Tax Revenues, net SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Foreign currency exchange Due In 2035 [Member] Due In 2035. Due In 2035 [Member] Public Utilities, Property, Plant and Equipment, Accumulated Depreciation Less: accumulated depreciation and amortization Reduction in deferred cost due to recovery request Reduction in deferred cost due to recovery request. New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Other Current Liabilities [Abstract] Other Current Liabilities [Abstract] Other Current Liabilities [Abstract] Commercial Paper, Maximum Term Commercial paper, maximum term Commercial Paper, Maximum Term Deferred Derivative Gain (Loss) [Member] Deferred Derivative Gain (Loss) [Member] Other Commitment, to be Paid, Year Four 2029 Earnings test triggering basis points Earnings test triggering basis points. Proceeds from Issuance of Long-Term Debt Proceeds from Issuance of long-term debt Proceeds from Issuance of Long-Term Debt, Total Lessee, Operating Lease, Term of Contract Lease term, purchased power agreement Regulatory assets from price risk management activities Regulatory assets from price risk management activities Assets from price risk management activities Common Stock, Shares, Outstanding Common stock, shares outstanding Balances, shares Balances, shares Storm Costs Storm Costs [Member] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Depreciation, Depletion and Amortization Depreciation and amortization Document Transition Report Document Transition Report Total commodity contracts Total commodity contracts Total commodity contracts Operating Expenses Operating Expenses Total operating and maintenance expense Fair valules as of the balance sheet date for all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be settled within one year or the normal operating cycle, if longer. Current Derivative Assets Total current derivative assets Revenue Recognition and Deferred Revenue [Abstract] Revenue Recognition and Deferred Revenue [Abstract] Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Net income and Comprehensive income Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Additional Net Regulatory Liability Additional net regulatory liability. Additional net regulatory liability Equity [Text Block] Shareholders' Equity Earnings Per Share [Text Block] Earnings Per Share Electricity Physical Forward Purchase Price Per Unit Electricity physical forward purchase price per unit. Electricity physical forward purchase, price per unit wildfire wildfire [Member] wildfire Contingencies Disclosure [Text Block] Contingencies Revenue Recognition [Abstract] Increase (Decrease) in Inventories Inventories Proceeds from (Payment for) Other Financing Activity Other us-gaap_revenuerefund us-gaap_revenuerefund [Member] us-gaap_revenuerefund Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity Allowance for equity funds used during construction Allowance for equity funds used during construction Fair Value of Financial Instruments [Abstract] Fair Value of Financial Instruments [Abstract] Fair Value of Financial Instruments [Abstract] Assets [Abstract] ASSETS Assets: Document Fiscal Year Focus Document Fiscal Year Focus Term Loan [Member] Term Loan. Term Loan [Member] Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Cash flows from investing activities: Disallowance of previously deferred costs Disallowance of previously deferred costs. Remaining percentage of flowing through operating expenses Remaining percentage of flowing through operating expenses Accounts Payable, Current Accounts payable Non Qualified Benefit Plans [Member] Non Qualified Benefit Plans [Member] Non Qualified Benefit Plans [Member] Asset Acquisition, Date of Acquisition Agreement Asset acquisition, date of agreement Fair value of financial instruments note. Fair Value of Financial Instruments Note [Abstract] Fair Value of Financial Instruments Note [Abstract] Regulatory assets Increase (Decrease) in Other Regulatory Assets Operating Expense Recovery From Base Rates Balancing Amount Operating expense recovery from base rates balancing amount. Operating expense recovery from base rates in balancing account Electricity physical forward purchase Electricity physical forward purchase Electricity physical forwards Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) [Abstract] Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) [Abstract] Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) [Abstract] Other Regulatory Liabilities [Member] Other regulatory liabilities. Line of credit facility, amount outstanding Long-Term Line of Credit Long-Term Line of Credit, Total Gain on Derivative Instruments, Pretax Gain on Derivative Instruments, Pretax Debt Instrument [Axis] Derivative Instrument [Axis] Derivative, by Nature [Axis] Derivative Instrument [Axis] Defined Benefit Plan, Interest Cost Interest cost Defined Benefit Plan, Non-service Cost Liabilities from price risk management activities: [Abstract] Liabilities from price risk management activities: [Abstract] Liabilities from price risk management activities: (1) (3) Assets, Fair Value Disclosure Assets, Fair Value Disclosure Forward sale price per share Forward sale price per share. Sale of Stock [Axis] Derivatives, Policy [Policy Text Block] Derivatives Revenues Revenues Total revenues Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash used in investing activities Title of 12(b) Security Title of 12(b) Security Derivative Instruments and Hedging Activities Disclosure [Text Block] Risk Management Public Utilities, Property, Plant and Equipment, Plant in Service Electric utility plant in-service Income Tax Disclosure [Text Block] Income Taxes Other Commitments Due In Next Twelve Months Other commitments due in next twelve months. 2026 Collaborative Arrangement and Arrangement Other than Collaborative [Table] Commercial Paper Commercial paper Utilities Operating Expense, Maintenance and Operations [Abstract] Operating and maintenance expense: Allowance for Credit Losses [Text Block] Schedule of Allowance for Uncollectible Accounts Activity Price Risk Management [Abstract] Price Risk Management [Abstract] Price Risk Management [Abstract] Other Liabilities, Noncurrent Other noncurrent liabilities Debt Instrument, Redemption, Period [Domain] Environmental Remediation Expense, before Recovery Environmental Remediation Expense Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Changes in working capital: Portion at Other than Fair Value Measurement [Member] Portion at Other than Fair Value Measurement Letters of Credit Outstanding, Amount Letters of Credit Outstanding, Amount Stock Issued During Period, Value, Deferred Equity Issuance Costs Stock issued during period, value, deferred equity issuance costs. Deferred equity issuance costs Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised Issuance of shares pursuant to equity-based plans Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Reclassification Of Amounts From Other Net To Environmental remediation Reclassification of amounts from other net to environmental remediation. Reclassification of amounts from other net to environmental remediation Incorporated Cities Number of incorporated cities in service area. Incorporated cities Measurement Frequency [Domain] Measurement Frequency [Domain] Trading Symbol Trading Symbol Due In 2045 [Member] Due In 2045. Due In 2045 [Member] Proceeds from (Repayments of) Commercial Paper Issuance of commercial paper, net Fair Value Transfer, Policy [Policy Text Block] Fair Value Transfer Subsequent Event Type [Axis] Forward Sale Agreement [Member] Forward sale agreement. Forward Sale Agreement Employee-related Liabilities, Current Accrued employee compensation and benefits Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Cash flows from financing activities: Termination fee Termination Fee Termination fee. Shares borrowed by forward counterparties Shares borrowed by forward counterparties. Allocation of Financial Asset to Hierarchy Levels [Policy Text Block] Allocation of Financial Asset to Hierarchy Levels [Policy Text Block] Allocation of Financial Asset to Hierarchy Levels Revenue Subject to Refund [Member] Clearwater RAC [Member] Equity Components [Axis] Equity Components [Axis] Line of Credit, Current Line of Credit, Current Nonoperating Income (Expense) Other income, net Other income, net Equity Component [Domain] Equity Component [Domain] Asset Class [Axis] Carrying amount as of the balance sheet date of the asset arising from commodity contracts related to electricity which are expected to be settled within a year or normal operating cycle, if longer. Commodity Contract Asset, Current, Electricity Electricity Deferred Tax Assets, Operating Loss Carryforwards, Domestic Tax credit carryforward, federal Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease) Increase in provision Utilities Operating Expense, Maintenance and Operations Generation, transmission and distribution Public Utilities, Property, Plant and Equipment, Construction Work in Progress Construction work-in-progress Maximum [Member] High [Member] Maximum Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset Cash Margin deposits from wholesale counterparties Liabilities, Fair Value Disclosure Total Statistical Measurement [Axis] Statistical Measurement [Axis] Finite-Lived Intangible Assets, Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Margin deposits from wholesale counterparties Ceded Credit Risk, Collateralization [Domain] Ceded Credit Risk, Collateralization [Domain] Common Stock, Value, Issued Common stock, no par value, 160,000,000 shares authorized; 115,785,254 and 115,559,079 shares issued and outstanding as of June 30, 2026 and December 31, 2025, respectively Natural gas financial swaps price per unit. Natural Gas Financial Swaps Price Per Unit Natural gas financial swaps, price per unit Consolidation, Policy [Policy Text Block] Condensed Consolidated Financial Statements Equity, Including Portion Attributable to Noncontrolling Interest Total shareholders' equity Balances Balances Secured Overnight Financing Rate (SOFR) [Member] SOFR [Member] Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset Letters of credit Residential [Member] Residential [Member] Residential [Member] Loss from Catastrophes [Member] Loss from Catastrophes [Member] Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments. Derivative Assets, Total Total derivative assets Preferred Stock, Shares Authorized Preferred stock, shares authorized Interest Payable, Current Accrued interest payable Deferred Income Tax Charge [Member] Deferred Income Tax Charge [Member] Costs and Expenses Costs and Expenses Total operating expenses Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Derivative Financial Instruments, Liabilities [Member] Liabilities [Member] Revenue from Contract with Customer [Text Block] Revenue Recognition Entity Registrant Name Entity Registrant Name Liability, Other Postretirement Defined Benefit Plan, Noncurrent Non-qualified benefit plan liabilities Other Nonoperating Income (Expense) Miscellaneous income, net SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Deposit Assets Deposit Assets, Total Margin deposit assets Income tax expense Income Tax Expense (Benefit) Income tax expense Measurement Frequency [Axis] Measurement Frequency [Axis] Proceeds from Issuance of Common Stock Net proceeds received Costs and Expenses [Abstract] Operating expenses: lower range of costs lower range of costs lower range of costs Deferred Regulatory Asset in Balancing Account Deferred regulatory asset in balancing account. Deferred regulatory asset in balancing account Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Deferred Revenue, Revenue Recognized Other accrued (deferred) revenues, net Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Accounts Receivable, Allowance for Credit Loss, Writeoff Amounts written off Commitments and Contingencies, Policy [Policy Text Block] Commitments and Contingencies Payments to Acquire Property, Plant, and Equipment Capital expenditures Payments to Acquire Property, Plant, and Equipment, Total Capital expenditures Payment for (Proceeds from) Other Investing Activity Other, net Assets Assets Total assets Inventory, Policy [Policy Text Block] Inventories Property, Plant and Equipment [Table] Schedule of Property, Plant and Equipment [Table] Number of Union Employees Number of Union Employees Number of employees subject to collective bargaining agreements. Income Statement [Abstract] Income Statement [Abstract] Ratio of Indebtedness to Net Capital Ratio of Indebtedness to Net Capital Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value of Financial Instruments Net volume associated with the reporting entity's derivative instruments recorded as of the balance sheet date having arisen from price risk management activities related to natural gas. Volume Related to Derivative Instruments at Balance Sheet Date, Commodity Contracts, Natural Gas Natural gas Preferred Stock, No Par Value Preferred stock, no par value Deferred Income Tax Expense (Benefit) Deferred income taxes Weighted Average [Member] Weighted Average [Member] Sale of Stock, Number of Shares Issued in Transaction Shares issued Stock Issued During Period, Shares, New Issues Issuances of shares pursuant to equity agreements New issues Earnings Per Share, Diluted Diluted Fair Value, Option, Quantitative Disclosures [Line Items] Commodity Contracts Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Segment Reporting Information, by Segment Credit Derivatives Contract Type [Axis] Credit Derivatives Contract Type [Axis] Dividends, Common Stock Dividends declared Asset Acquisition [Axis] City Area Code City Area Code Regulatory liabilitie current Regulatory liabilitie current. Regulatory liabilities - current Fair Value Option, Disclosures [Table Text Block] Schedule of Quantitative Information Regarding the Significant Unobservable Inputs Used in Measurement of Level 3 Assets and Liabilities from Price Risk Management Activities Money Market Funds at Non Qualified Benefit Plan Trust Money market funds at non qualified benefit plan trust. Money market funds Other Commitment, to be Paid, Year Three 2028 Finance Lease, Liability, Noncurrent Finance lease obligations, net of current portion Debt Instrument, Face Amount Long term debt, face amount Delay draw term loan amount Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Bridge facility amount Defined Benefit Plan [Table] Defined Benefit Plan [Table] Utility Plant [Domain] Litigation Case [Axis] Litigation Case [Axis] Deferred Regulatory Asset Deferred regulatory asset. Deferred regulatory asset Letter of Credit [Member] Guarantees [Abstract] Guarantees [Abstract] Deferred investment tax credits Deferred investment tax credits Deferred investment tax credits Derivative Liability, Current Liabilities from price risk management activities-current Regulatory Liability, Noncurrent Regulatory liabilities-noncurrent Regulatory liabilities-noncurrent Portland harbor environmental remediation account [Member] Portland harbor environmental remediation account [Member] Portland Harbor Environmental Remediation Account Operating Income (Loss) Operating Income (Loss) Income from operations Number Of Potentially Responsible Parties Site Contingency, Names of Other Potentially Responsible Parties Number of potentially responsible parties Number of potentially responsible parties. Retained Earnings [Member] Retained Earnings [Member] Purchase price Asset Acquisition, Consideration Transferred Asset Acquisition, Consideration Transferred, Total Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Public Utility [Axis] Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash provided by financing activities Unamortized Debt Issuance Expense Unamortized Debt Issuance Expense Schedule of Other Current Assets [Table Text Block] Schedule of Other Current Assets Derivative Liability, Noncurrent Liabilities from price risk management activities-noncurrent Derivative Contract [Domain] Derivative, Name [Domain] Derivative Contract [Domain] Number of loans from the Lenders Number of loans from the Lenders EPA Investigation of Portland Harbor EPA Investigation of Portland Harbor [Member] EPA Investigation of Portland Harbor [Member] Entity Interactive Data Current Entity Interactive Data Current Fair Value Measurement [Domain] Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Cash flows from operating activities: Removal Costs [Member] Removal Costs [Member] Noncurrent Liabilities, Commodity Contracts: [Abstract] Noncurrent Liabilities, Commodity Contracts: [Abstract] Noncurrent Liabilities, Commodity Contracts: [Abstract] Unbilled Receivables, Current Unbilled Receivables, Current Common Stock, Dividends, Per Share, Declared Common Stock, Dividends, Per Share, Declared Line of Credit Facility, Current Borrowing Capacity Line of Credit Facility, Current Borrowing Capacity Entity Tax Identification Number Entity Tax Identification Number Regulated Operation, Regulatory Asset [Table] Regulated Operation, Regulatory Asset [Table] Long-Term Debt, Type [Axis] Price Risk Derivatives [Table] Other Commitment, to be Paid, after Year Five Thereafter Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Basis of Presentation Operating Lease, Liability, Related to Power Purchase Agreements Operating Lease, Liability, Related to Power Purchase Agreements Operating Lease, Liability, Related to Power Purchase Agreements Operating Lease, Liability, Related to Power Purchase Agreements Proceeds from Issuance or Sale of Equity Proceeds from issuance of common stock Issuances of shares pursuant to equity agreements Local Phone Number Local Phone Number Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Net periodic benefit cost Other Liabilities, Current Accrued expenses and other current liabilities Total accrued expenses and other current liabilities Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted-average common shares outstanding (in thousands): Increase (Decrease) in Regulatory Liabilities Regulatory liabilities Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Balance Sheet Components [Abstract] Balance Sheet Components [Abstract] Balance Sheet Components [Abstract] Other Current Assets [Table] Other Current Assets [Table] Other Current Assets [Table] Underwriting discount equal price per share Underwriting discount equal price per share. Entity Emerging Growth Company Entity Emerging Growth Company