Proceeds from disposal of business Proceeds from Divestiture of Businesses Public utilities, net annual revenue settlement of amortization period Public Utilities, Amortization, Amount Of Deferred Tax Regulatory Liabilities, Period Public Utilities, Amortization, Amount Of Deferred Tax Regulatory Liabilities, Period ARO Type [Axis] ARO Type [Axis] ARO Type Other Temporary Investments Investment, Policy [Policy Text Block] Schedule of Available-For-Sale Securities Debt Securities, Available-for-Sale [Table Text Block] Schedule of Short-term Debt Schedule of Short-Term Debt [Table Text Block] Investments Held in Trust for Future Liabilities Postemployment Benefit Plans, Policy [Policy Text Block] Commodity Commodity Contract [Member] Expected Return on Plan Assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Schedule of Estimated Payments Expected to be Made by the Pension and OPEB Plans Schedule of Expected Benefit Payments [Table Text Block] Wagon Wheel Wagon Wheel Wind Facility [Member] Wagon Wheel Wind Facility Increase in ARO Asset Retirement Obligation, Period Increase (Decrease) Public utilities, net annual revenue settlement of amortization Public Utilities, Amortization, Amount Of Deferred Tax Regulatory Liabilities Public Utilities, Amortization, Amount Of Deferred Tax Regulatory Liabilities Accumulated Depreciation and Amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Including Public Utilities Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Including Public Utilities Entity File Number Entity File Number Transmission Revenues Wholesale Revenues - Transmission Wholesale Transmission [Member] Wholesale Transmission. Settlement agreement securitization bonds regulatory assets recovery Settlement Agreement Securitization Bonds Regulatory Assets Recovery Settlement Agreement Securitization Bonds Regulatory Assets Recovery Noncash Acquisitions Under Finance Leases Acquisitions Under Finance Leases Lease Obligation Incurred Target Defined Benefit Plan, Plan Assets, Target Allocation, Percentage 2029 - 2030 Maturity Period 5 [Member] New Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Billings from Significant Variable Interest Billings from Significant Variable Interest [Table Text Block] Billings from significant variable interest entity. Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Schedule of Book Values and Fair Values of Long-term Debt Fair Value, by Balance Sheet Grouping [Table Text Block] TOTAL PROPERTY, PLANT AND EQUIPMENT – NET Property, Plant and Equipment, Net Net Property, Plant and Equipment Regulated And Nonregulated Property, Plant, And Equipment, Net Regulated And Nonregulated Property, Plant, And Equipment Adjustment to Compensation: Adjustment to Compensation [Axis] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Direct Sales to East Affiliates Direct Sales to East Affiliates [Member] Direct Sales to East Affiliates. REVENUE FROM CONTRACTS WITH CUSTOMERS Revenue from Contract with Customer [Text Block] AEP Credit AEP Credit, Inc. [Member] AEP Credit, Inc. Variable Interest Entity Member Securitized Debt for Receivables – AEP Credit Short-term – Securitized Debt of Receivables Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] FERC 2021 Transmission Formula Rate Challenge Refunds FERC 2021 Transmission Formula Rate Challenge Refunds [Member] FERC 2021 Transmission Formula Rate Challenge Refunds Approved carrying charges Approved Carrying Charges Approved Carrying Charges 2027 Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt, Year Two Adjustment to Compensation, Amount Adjustment to Compensation Amount Percentage of Significant Customers Concentration Risk Concentration Risk, Percentage Pension Plans Pension Plan [Member] Oklahoma OKLAHOMA OH OHIO Total Federal Federal Income Tax Expense (Benefit), Continuing Operations Employee Stock Option Share-Based Payment Arrangement, Option [Member] Pension and OPEB Funded Status Pension Costs [Member] Asset Removal Costs Asset Removal Costs [Member] Asset Removal Costs Member. Ultimate Defined Benefit Plan, Ultimate Health Care Cost Trend Rate Requested securitization bonds regulatory assets recovery Requested Securitization Bonds Regulatory Assets Recovery Requested Securitization Bonds Regulatory Assets Recovery Schedule of Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Common Stock – Shares Authorized (in shares) Common Stock, Shares Authorized Issuance of Common Stock (in shares) Issued (in shares) Stock Issued During Period, Shares, New Issues Interest Crediting Rate Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Interest Crediting Rate Interest Crediting Rate used to determine benefit obligation of defined benefit plan. Annual increase, surcharges, number of consecutive years Annual Increase, April 1st Surcharge, Number Of Consecutive Years Annual Increase, April 1st Surcharge, Number Of Consecutive Years Schedule of Contractual Commitments Recorded Unconditional Purchase Obligations [Table Text Block] LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Insurance premium expense to protected cell Insurance Premium Expense To Protected Cell Insurance premium expense to protected cell. Generation Public Utilities, Property, Plant and Equipment, Generation, Useful Life Net Income Attributable to Noncontrolling Interests Net Income Attributable to Noncontrolling Interest Net Income (Loss) Attributable to Noncontrolling Interest Rate of compensation increase Rate of Compensation Increase Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Defined Contribution, Employer Matching Conditions One Defined Contribution, Employer Matching Conditions One [Member] Defined Contribution, Employer Matching Conditions One Public Utility, Property, Plant and Equipment [Table] Public Utility, Property, Plant and Equipment [Table] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Flow-Through of CAMT Effective Income Tax Rate Reconciliation, Flow-Through Of CAMT, Amount Effective Income Tax Rate Reconciliation, Flow-Through Of CAMT, Amount Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Insurance coverage for property damage decommissioning and decontamination Insurance Coverage For Property Damage Decommissioning And Decontamination Insurance coverage for property damage, decommissioning and decontamination. Retirement Benefits [Abstract] Retirement Benefits [Abstract] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Base Rate [Domain] Base Rate [Domain] Base Rate Domain. Statement of Financial Position Location, Activity, Accrual [Axis] Statement of Financial Position Location, Activity, Accrual [Axis] Total issuances Proceeds from Issuance of Debt Total Compensation Cost Capitalized Share-Based Payment Arrangement, Amount Capitalized Schedule of Fees Paid to AEP Credit for Customer Accounts Receivable Sold Schedule Of Fees Paid To AEP Credit For Customer Accounts Receivable Sold [Table Text Block] Fees paid to AEP Credit for customer accounts receivable sold. Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Revolving Credit Facility, Due March 2029 Revolving Credit Facility, Due March 2029 [Member] Revolving Credit Facility, Due March 2029 TEXAS Texas TX TEXAS Variable Interest Component [Domain] Variable Interest Component [Domain] Variable Interest Component [Domain] Trust Assets [Axis] Trust Assets [Axis] Trust Assets [Axis] Approved net increase in Kentucky annual revenues Approved Net Increase in Kentucky Annual Revenues Approved Net Increase in Kentucky Annual Revenues Borrowed funds used during construction Allowance for Funds Used During Construction, Capitalized Interest Rate of Compensation Increase Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Accounts Receivable and Allowance for Credit Losses Receivable [Policy Text Block] Property, plant and equipment, gross Asset Acquisition, Property, Plant and Equipment, Gross Asset Acquisition, Property, Plant and Equipment, Gross Renewable Energy Surcharge - Michigan Renewable Energy Surcharge - Michigan [Member] Renewable Energy Surcharge - Michigan ARO Type [Domain] ARO Type [Domain] ARO Type Award Timing Method Award Timing Method [Text Block] Total Property, Plant and Equipment Public Utilities, Property, Plant and Equipment, Plant in Service [Member] Public Utilities, Property, Plant and Equipment, Plant in Service 2024-2025 Virginia Biennial Under-Earnings 2024-2025 Virginia Biennial Under-Earnings [Member] 2024-2025 Virginia Biennial Under-Earnings Power (MWhs) Power Contract Member [Member] Nominal energy measure used to calculate payments on a derivative instrument. Hedging Relationship [Domain] Hedging Relationship [Domain] Parent Company Parent Company [Member] Maintenance Utilities Operating Expense, Maintenance [Member] Utilities Operating Expense, Maintenance Sale of stock, underwiring discount, per share (in dollars per share) Sale Of Stock, Underwiring Discount, Per Share Sale Of Stock, Underwiring Discount, Per Share Settlement amount recoverable for dry cask noncurrent Settlement Amount Recoverable For Dry Cask Noncurrent Amount expected to be recovered from a governmental agency beyond one year for settlement of spent fuel disposal litigation. Stock-Based Compensation Plans Share-Based Payment Arrangement [Policy Text Block] Trading Symbol Trading Symbol Virginia VIRGINIA Total number of employees Total Number of Employees The total Number of Employees employed by the company. Sale of stock, initial price per share (in dollars per share) Sale Of Stock, Initial Price Per Share Sale Of Stock, Initial Price Per Share 2030 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Five Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount RSUs and Unrestricted Shares Restricted Stock Units (RSUs) [Member] Severance Expense Incurred Severance Costs Number of FERC-regulated transmission-only electric utilities Number Of FERC-Regulated Transmission-Only Electric Utilities Number Of FERC-Regulated Transmission-Only Electric Utilities Business combination, consideration transferred Business Combination, Consideration Transferred 2028 Long-Term Debt, Maturity, Year Three Recorded as Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax Fair Value Hedging Instruments Derivative, Gain (Loss) on Derivative, Net 2026 Defined Benefit Plan, Expected Future Benefit Payment, Year One Less: Imputed Interest Finance Lease, Liability, Undiscounted Excess Amount Common Stock – Shares Outstanding (in shares) Common Stock, Shares, Outstanding Total Wholesale and Competitive Retail Revenues Wholesale and Competitive [Member] Revenues related to wholesale and competitive sales. Tennessee TENNESSEE Heating Oil and Gasoline (Gallons) Heating Oil And Gasoline Contract [Member] Nominal volume used to calculate payments on a derivative instrument. Treasury Stock Reissued (in shares) Partners' Capital Account, Units, Treasury Units Reissued Related party transaction, agreement term Related Party Transaction, Agreement Term Related Party Transaction, Agreement Term 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] Short-Term Lending Short-Term Lending [Member] Short-Term Lending Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Interest Rate Debt Instrument, Interest Rate, Effective Percentage Income Tax Expense Income Tax Expense (Benefit) Income Tax Expense (Benefit) Income Tax Expense (Benefit) Income Tax Expense (Benefit) SWTCo AEP Southwestern Transmission Co [Member] AEP Southwestern Transmission Co Pixley Pixley Solar Energy, LLC [Member] Pixley Solar Energy, LLC NRG Energy and Vistra Corp NRG Energy and Vistra Corp [Member] NRG Energy and Vistra Corp Schedule of Amount of Gain (Loss) Recognized on Risk Management Contracts Schedule of Derivative Instruments Included in Trading Activities [Table Text Block] Cash Flow Hedges, Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Senior Unsecured Notes Senior Unsecured Notes Unsecured Debt Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Capital Contribution From Parent Capital Contribution From Parent [Member] Capital Contribution From Parent Regulatory Assets and Liabilities Disclosure [Abstract] Total Property, Plant and Equipment Property, Plant and Equipment, Gross Does not earns/earning a return Regulatory Assets, Not Earning Return [Member] Regulatory Assets, Not Earning Return Total Recorded Unconditional Purchase Obligation Schedule of Affiliated Accounts Receivable Contracts with Customers Affiliated Accounts Receivable Contracts with Customers [Table Text Block] Tabular disclosure of affiliated accounts receivable contracts with customers. Schedule of Fixed Income And Equity Securities Activity Debt and Equity Securities Within Other Temporary Investments [Table Text Block] Debt and equity securities within Other Temporary Investments. Performance obligation period Revenue from Contract with Customer, Performance Obligation Period Revenue from Contract with Customer, Performance Obligation Period Schedule of Underfunded Accumulated Benefit Obligation Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block] Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Performance metric, operating period, weight Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Metric, Operating Period, Weight Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Metric, Operating Period, Weight Schedule of Depreciation, Depletion and Amortization - Regulated Depreciation, Depletion and Amortization - Regulated [Table Text Block] Regulated depreciation, depletion and amortization. Other Current Assets Increase (Decrease) in Other Current Assets Notes Payable Notes Payable - Nonaffiliated Notes Payable, Other Payables [Member] VOLUNTARY SEVERANCE PROGRAM Restructuring and Related Activities Disclosure [Text Block] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Pollution Control Bonds Pollution Control Bonds [Member] Pollution Control Bonds Member. Schedule of Allowance For Borrowed Funds Used During Construction Allowance For Borrowed Funds Used During Construction [Table Text Block] Allowance for borrowed funds used during construction including capitalized interest. Federal Income Tax Paid, Federal, after Refund Received All Trading Arrangements All Trading Arrangements [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Settlement revenue requirement rate decrease year one Public Utilities, Requested Settlement Of Revenue Year One Increase (Decrease), Amount Public Utilities, Requested Settlement Of Revenue Year One Increase (Decrease), Amount Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Accumulated Benefit Obligation Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation Requested annual base rate increase (decrease) Public Utilities, Requested Rate Increase (Decrease), Amount Commitments and Contingencies Disclosure [Abstract] WPCo Wheeling Power Co [Member] [Domain] Wheeling Power Co [Member] [Domain] 2020 Texas Base Rate Case 2020 Texas Base Rate Case [Member] 2020 Texas Base Rate Case Statutory Accounting Practice, Jurisdiction [Axis] Statutory Accounting Practice, Jurisdiction [Axis] Effective Income Tax Rate Reconciliation [Table] Effective Income Tax Rate Reconciliation [Table] Approved carrying charges, recovery period Approved Carrying Charges, Recovery Period Approved Carrying Charges, Recovery Period PEO Total Compensation Amount PEO Total Compensation Amount Great Plains Energy Inc. Great Plains Energy Inc. [Member] Great Plains Energy Inc. [Member] Amounts Recognized Due to Settlement Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax Settlements Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases, Sales, Issues, Settlements Derivative liability, measurement input Derivative Liability, Measurement Input Total Liabilities Gross Amounts Recognized Derivative Liability, Subject to Master Netting Arrangement, before Offset Amount of approved increase related to vegetation management Amount of Approved Increase Related to Vegetation Management Amount of Approved Increase Related to Vegetation Management 2025 Ohio Base Rate Case 2025 Ohio Base Rate Case [Member] 2025 Ohio Base Rate Case Number of reportable segments Number of Reportable Segments Revenues Sales [Member] Transource Energy Transource Energy [Member] Transource Energy [Member] Regulatory Liabilities and Deferred Investment Tax Credits Total Noncurrent Regulatory Liabilities and Deferred Investment Tax Credits Regulatory Liability, Noncurrent Entity Address, State or Province Entity Address, State or Province 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 Common Stock Dividends Dividends, Common Stock 2029 Defined Benefit Plan, Expected Future Benefit Payment, Year Four Estimated cost to be recovered Regulatory Assets, Estimated Cost to be Recovered Regulatory Assets, Estimated Cost to be Recovered TOTAL CURRENT LIABILITIES Current Liabilities Liabilities, Current Reclassifications of KPCo Pension and OPEB Regulatory Assets to AOCI, Net of Income Tax (Expense) Benefit Reclassification Into Accumulated Other Comprehensive Income, Current Period, Net Of Tax Reclassification Into Accumulated Other Comprehensive Income, Current Period, Net Of Tax Fair value of derivative liability, subject to cross-default provision Fair Value Of Derivative Liabilities Subject To Cross Default Provisions Fair value of derivative liabilities subject to cross-default provisions. Inventory [Axis] Inventory [Axis] Individual: Individual [Axis] Stock Unit Accumulation Plan Stock Unit Accumulation Plan [Member] Stock Unit Accumulation Plan for Non-Employee Directors. AEPTHCo Transmission Operations [Member] Transmission Operations Member. Approved return on equity Public Utilities, Approved Return on Equity, Percentage Industrial Revenues Industrial [Member] Retail revenues from the industrial class. Schedule of Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Valuation Assumptions Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Valuation Assumptions [Table Text Block] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Valuation Assumptions Dividends Paid on Common Stock Dividends Paid on Common Stock Dividends paid on common stock Payments of Ordinary Dividends, Common Stock Total To/(From) Tax Authority Income Tax Paid, Federal And State And Local, Net Income Tax Paid, Federal And State And Local, Net Entities [Table] Entities [Table] Annual increase april 1st surcharge Annual Increase April 1st Surcharge Annual Increase April 1st Surcharge Cash and Cash Equivalents Defined Benefit Plan, Cash and Cash Equivalents [Member] Maximum Exposure Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Entity Interactive Data Current Entity Interactive Data Current West Virginia Corporate Alternative Minimum Tax West Virginia Corporate Alternative Minimum Tax [Member] West Virginia Corporate Alternative Minimum Tax Green Country Deferral Green Country Deferral [Member] Green Country Deferral WV WEST VIRGINIA Regulatory Liability for Over-Recovered Fuel Costs Regulatory Liability, Deferred Fuel Costs Regulatory Liability, Deferred Fuel Costs Obligations Under Finance Leases: Property, Plant and Equipment and Other Related Obligations Under Finance Leases [Abstract] Property, Plant and Equipment and Other Related Obligations Under Finance Leases AEP Common Stock Settlements for Performance Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Settlements Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Settlements Condensed Income Statement [Table] Condensed Income Statement [Table] Funded (Underfunded) Status as of December 31, Defined Benefit Plan, Funded (Unfunded) Status of Plan Accrued Nuclear Decommissioning Deferred Tax Assets (Liabilities), Asset Retirement Obligation Deferred Tax Assets (Liabilities), Asset Retirement Obligation Virginia Generation Rate Adjustment Clause Virginia Generation Rate Adjustment Clause [Member] Virginia Generation Rate Adjustment Clause Regulatory Asset Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Accounting for the Effects of Cost-Based Regulation Regulatory Assets and Liabilities, Recognition Criteria [Policy Text Block] Describes the entity's criteria for recording regulatory assets and regulatory liabilities only because they are included in the rate-setting process, and rate-related accruals and deferrals, such as amounts receivable from (or due to) customers under fuel adjustment clauses and interim rates collected prior to regulatory approval. Net Operating Loss Carryforward Future income tax benefit Deferred Tax Assets, Operating Loss Carryforwards Capital Contribution from Parent Proceeds from Contributions from Parent Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] System Resiliency Plan Deferred Costs System Resiliency Plan Deferred Costs [Member] System Resiliency Plan Deferred Costs Change in Advances from Affiliates, Net Proceeds From (Payments For) Advances From Affiliate Proceeds From (Payments For) Advances From Affiliate 2030 - 2031 Maturity Period Six [Member] Auditor [Table] Auditor [Table] Customer [Domain] Customer [Domain] Accrued Interest Accrued Interest Accrued interest Interest Payable, Current Entity Central Index Key Entity Central Index Key PEO Name PEO Name TOTAL REVENUES Total Revenues TOTAL REVENUES Revenues 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] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Total State and Local State and Local Income Tax Expense (Benefit), Continuing Operations Restricted Cash Restricted Cash [Member] Restricted Cash Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Nonqualified Pension Plans Nonqualified Plan [Member] Risk management asset, offset Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset Advances to Affiliates Advances to Affiliate Exercise Price Award Exercise Price Other Cash Deposits Other Cash Deposits [Member] Other Cash Deposits [Member] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Maximum Borrowings Maximum Borrowings from Money Pool Maximum Borrowings from a Money Pool at anytime during the period. The Money Pool represents a centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries. Net capacity factor guarantee, measurement period started Public Utilities, Net Capacity Factor Guarantee, Measurement Period Public Utilities, Net Capacity Factor Guarantee, Measurement Period Qualified Pension Plan Qualified Plan [Member] Amount of (Gain) Loss Reclassified from AOCI Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax 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] Settlement agreement return on common equity Settlement Agreement Return on Common Equity Settlement Agreement Return on Common Equity DERIVATIVES AND HEDGING Derivative Instruments and Hedging Activities Disclosure [Text Block] Amortization of Prior Service Credit Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Recovery of costs, period Public Utilities, Recovery Of Costs, Period Public Utilities, Recovery Of Costs, Period Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Reclassifications of KPCo Pension and OPEB Regulatory Assets to AOCI, before Income Tax (Expense) Benefit Reclassification Into Accumulated Other Comprehensive Income, Current Period, Before Tax Reclassification Into Accumulated Other Comprehensive Income, Current Period, Before Tax Fair Value as of Grant Date Award Grant Date Fair Value System Resiliency Plan Deferrals System Resiliency Plan Deferrals [Member] System Resiliency Plan Deferrals Domestic Defined Benefit Plan, Equity Securities, US [Member] DOE SNF disposal fee DOE SNF Disposal Fee Department of Energy disposal fee collect from nuclear plant owners for Spend Nuclear Fuel. On November 19, 2013 the U.S. Court of Appeals for the D.C. circuit directed the reduction of the ongoing fee to zero. AFUDC Equity Effective Income Tax Rate Reconciliation AFUDC Equity Percentage Effective Income Tax Rate Reconciliation AFUDC Equity Percentage Common Collective Trust - Debt Defined Benefit Plan, Common Collective Trust, Debt [Member] Common Collective Trust - Debt. Deferred Purchased Power Expenses Deferred Purchased Power Expenses [Member] Deferred Purchased Power Expenses Revision of reclamation costs Asset Retirement Obligation, Revision of Estimate, Estimated Reclamation Costs - 1 Asset Retirement Obligation, Revision of Estimate, Estimated Reclamation Costs - 1 Changes in Unrecognized Tax Benefits Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Recommended increase (decrease) in rates Public Utilities, Recommended Increase (Decrease) In Rates Public Utilities, Recommended Increase (Decrease) In Rates Loans Loans to Parent Loans to Parent at period end. Parent represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries. TOTAL EXPENSES Costs and Expenses Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Related Party Transaction [Line Items] Related Party Transaction [Line Items] Fair Value Portion of Long-term Debt Gain (Loss) on Fair Value Portion of Long Term Debt Gain (Loss) on fair value portion of long-term debt. Fair Value Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Condensed Financial Information Disclosure [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] AFUDC Equity Effective Income Tax Rate Reconciliation, AFUDC Equity, Amount Effective Income Tax Rate Reconciliation, AFUDC Equity, Amount 2028 Defined Benefit Plan, Expected Future Benefit Payment, Year Three Approved debt capital structure Public Utilities, Approved Debt Capital Structure, Percentage Amortization of Actuarial Loss Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Non-PEO NEO Non-PEO NEO [Member] Letters of credit outstanding, amount Letters of Credit Outstanding, Amount Amounts Due to Customers for Future Income Taxes Deferred Tax Assets (Liabilities), Amounts Due To Customers For Future Income Taxes The difference between the tax basis and the carrying amount of an asset or liability in the financial statements prepared in accordance with GAAP that will result in taxable amounts in one or more future periods related to amounts due from customers for future federal income taxes. Sale of Stock [Axis] Sale of Stock [Axis] Schedule of Interest Income Earned for Funds Loaned to Utility Money Pool Interest Income Earned for Funds Loaned to Utility Money Pool [Table Text Block] Interest Income Earned for Funds Loaned to Utility Money Pool Recommended reduction in employee related expenses Public Utilities, Recommended Reduction In Employee Related Expenses Public Utilities, Recommended Reduction In Employee Related Expenses Gross unrealized gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Construction Contract for Capital Assets Construction Contract For Capital Assets [Member] Construction Contract For Capital Assets Schedule of Regulatory Liabilities Schedule of Regulatory Liabilities [Table Text Block] Amortization of Prior Service Cost (Credit) Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] Maximum Loans Maximum Loans to Money Pool Maximum Loans to a Money Pool at anytime during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries. PUBLIC SERVICE COMPANY OF OKLAHOMA PSO Public Service Company Of Oklahoma [Member] Public Service Company Of Oklahoma Member Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Number of member companies allocated for power and natural gas risk management activities Number Of Member Companies Allocated For Power and Natural Gas Risk Management Activities Number Of Member Companies Allocated For Power and Natural Gas Risk Management Activities Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Increase in Regulatory Assets Increase in Regulatory Assets [Member] Increase in Regulatory Assets Capital lease payments made Capital lease Payments made Capital lease payments made by I&M to DCC Fuel. Dividend Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Estimate of Fair Value Measurement Estimate of Fair Value Measurement [Member] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Charged to Costs and Expenses SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Incremental ownership percentage Equity Method Investment, Incremental Ownership Percentage Equity Method Investment, Incremental Ownership Percentage AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Increase due to load loss Public Utilities, Requested Rate Increase (Decrease), Amount Related To Load Loss Public Utilities, Requested Rate Increase (Decrease), Amount Related To Load Loss Additional ongoing costs for post decommissioning storage of SNF Additional Ongoing Costs for Post Decommissioning Storage of SNF Additional Ongoing Costs for Post Decommissioning Storage of SNF Performance Shares Voluntarily Deferred into the Incentive Compensation Deferral Program (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Shares Voluntarily Deferred Performance Units Voluntarily Deferred into the Incentive Compensation Deferral Program. Number of additional sites for which could lead to potentially responsible party designation Number Of Additional Sites For Which Could Lead To Potentially Responsible Party Designation Number Of Additional Sites For Which Could Lead To Potentially Responsible Party Designation Schedule of Amounts Included in AOCI and Regulatory Assets Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Percentage of shares acquired Asset Acquisition, Percentage of Shares Acquired Asset Acquisition, Percentage of Shares Acquired REVENUES Revenues [Abstract] Amortization of Nuclear Fuel Amortization of Nuclear Fuel The expense charged against earnings for the periodic recognition of nuclear fuel usage. Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] West Virginia Environmental Compliance Surcharge West Virginia Environmental Compliance Surcharge [Member] West Virginia Environmental Compliance Surcharge West Virginia Modified Rate Base Cost West Virginia Modified Rate Base Cost [Member] West Virginia Modified Rate Base Cost Excess ADIT that is Not Subject to Rate Normalization Requirements Excess ADIT that is Not Subject to Rate Normalization Requirements [Member] Excess ADIT that is Not Subject to Rate Normalization Requirements [Member] Hedged liability, statement of financial position Hedged Liability, Statement of Financial Position [Extensible Enumeration] Financial Instruments [Domain] Financial Instruments [Domain] Extended compliance deadline applicable period Asset Retirement Obligation, Compliance Deadline Extension Asset Retirement Obligation, Compliance Deadline Extension Deferred Tax Liabilities Deferred Tax Liabilities, Gross Number of order FERC issues Number of Order FERC Issues Number of Order FERC Issues 2030 Long-Term Debt, Maturity, Year Five Interim annual base rate increase Public Utilities, Interim Annual Base Rate Increase Public Utilities, Interim Annual Base Rate Increase Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] 2020-2022 Virginia Triennial Under-Earnings Virginia Triennial Under Earnings [Member] Virginia Triennial Under Earnings Regulatory Asset Return Disclosure [Domain] Regulatory Asset Return Disclosure [Domain] Regulatory Asset Return Disclosure [Domain] Weighted-Average Discount Rate: Weighted-Average Discount Rate [Abstract] Weighted-Average Discount Rate Number of states within service area Number Of States Within Service Area Number Of States Within Service Area Excess SO2 Allowance Inventory Excess SO2 Allowance Inventory [Member] Excess SO2 Allowance Inventory Distribution Public Utilities, Property, Plant and Equipment, Distribution, Useful Life Year Ultimate Reached Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Fair Value Measurement [Domain] Fair Value Measurement [Domain] FINANCING ACTIVITIES Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Earning test, over-earning credit to customers, proposed Public Utilities, Earning Test, Over-Earning Credit To Customers, Proposed Public Utilities, Earning Test, Over-Earning Credit To Customers, Proposed Revised requested annual increase Public Utilities, Revised Requested Annual Increase Public Utilities, Revised Requested Annual Increase EARNINGS ATTRIBUTABLE TO AEP MEMBER, Diluted Net Income (Loss) Available to Common Stockholders, Diluted Net Income (Loss) Available to Common Stockholders, Diluted Noncurrent Liabilities Noncurrent Liabilities [Member] Noncurrent Liabilities Expected Volatility Minimum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Recognition of Pension Settlement Costs, Net of Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax Total MTM Derivative Contract Net Assets (Liabilities) Derivative Assets (Liabilities), at Fair Value, Net WEIGHTED AVERAGE NUMBER OF DILUTED AEP COMMON SHARES OUTSTANDING (in shares) Weighted Average Number of Shares Outstanding, Diluted Schedule of Purchased Power from OVEC Schedule Of Purchases From Variable Interest Entities [Table Text Block] Schedule Of Purchases From Variable Interest Entities Disallowance Cost Effective Income Tax Rate Reconciliation, Disallowance Cost, Amount Effective Income Tax Rate Reconciliation, Disallowance Cost, Amount Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Derivative [Table] Derivative [Table] Welsh Plant, Units 1 and 3 Welsh Plant Unit 1 and 3 [Member] Welsh Plant Unit 1 and 3 [Member] Securities loaned, fair value Defined Benefit Plan, Securities Loaned Defined Benefit Plan, Securities Loaned Entity Small Business Entity Small Business Schedule of AEP's Investment In OVEC AEP's Investment In OVEC [Table Text Block] AEP's investment in OVEC. Schedule of Changes in Fair Value of Net Trading Derivatives Classified as Level 3 Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Total Future Minimum Lease Payments Finance Lease, Liability, to be Paid Rock Falls [Member] Rock Falls Wind Facility [Member] Rock Falls Wind Facility Affiliated Notes Affiliated Notes [Member] Affiliated Notes Document Period End Date Document Period End Date Total Spent Nuclear Fuel and Decommissioning Trusts Spent Nuclear Fuel And Decommissioning Trusts, Fair Value Disclosure Spent Nuclear Fuel And Decommissioning Trusts, Fair Value Disclosure Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Dolet Hills Power Station Accelerated Depreciation Dolet Hills Power Station Accelerated Depreciation [Member] Dolet Hills Power Station Accelerated Depreciation Tax Reform Excess ADIT Reversal Effective Income Tax Rate Reconciliation, Tax Reform, Excess ADIT Reversal, Amount Effective Income Tax Rate Reconciliation, Tax Reform, Excess ADIT Reversal, Amount Performance Shares and AEP Career Shares (Reinvested Dividends Portion) Performance Shares and AEP Career Shares [Member] Performance Shares and AEP Career Shares 2024 Long-Term Incentive Plan 2024 Long-Term Incentive Plan [Member] 2024 Long-Term Incentive Plan Diversion Wind Energy, LLC Diversion Wind Energy, LLC [Member] Diversion Wind Energy, LLC Pension Settlement Pension Settlement [Member] Pension Settlement Beginning balance Ending balance TOTAL EQUITY Equity Equity, Including Portion Attributable to Noncontrolling Interest Name Outstanding Recovery, Individual Name Paid-in Capital Additional Paid in Capital Affiliated Companies Accounts receivable – affiliated companies Accounts and Other Receivables, Net, Current Product and Service [Axis] Product and Service [Axis] Notes Payable Notes Payable Less: Accumulated Depreciation Public Utilities, Property, Plant and Equipment, Accumulated Depreciation Statistical Measurement [Axis] Statistical Measurement [Axis] Fixed Income Defined Benefit Plan, Fixed Income Securities [Member] Defined Benefit Plan, Fixed Income Securities Advances to Affiliates Loans to the Nonutility Money Pool Other Receivables, Net, Current Regulatory Asset [Domain] Regulatory Asset [Domain] Disposal Group Name [Axis] Disposal Group Name [Axis] Number of generation plants Number Of Generation Plants Number Of Generation Plants Production Tax Credits Effective Income Tax Rate Reconciliation, Tax Credit, Energy-Related, Amount Level 1 Fair Value, Inputs, Level 1 [Member] Rockport Plant Dry Sorbent Injection System and Selective Catalytic Reduction Rockport Plant Dry Sorbent Injection System and Selective Catalytic Reduction [Member] Rockport Plant Dry Sorbent Injection System and Selective Catalytic Reduction Schedule of Securities Activity Securities Activity Within Decommissioning and SNF Trusts [Table Text Block] Securities Activity Within the decommissioning and SNF trusts. TOTAL DILUTED EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS (in USD per share) Weighted-Average Number of Diluted AEP Common Shares Outstanding (in USD per share) Earnings Per Share, Diluted Other Credits Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount Environmental Control Projects Environmental Control Projects [Member] Environmental Control Projects [Member] Authorized Short-term Borrowing Limit Authorized Short Term Borrowing Limit Authorized Short-term Borrowing Limit by regulatory orders. Shares were Held in Treasury (in shares) Beginning balance (in shares) Ending balance (in shares) Treasury Stock, Common, Shares State and Local: Income Tax Paid, State and Local, after Refund Received Minimum Interest Rate for Funds Loaned Minimum Interest Rate for Funds Loaned The minimum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, loaned during the period. Settlement charge Postemployment Benefits, Period Expense Amount recorded in ARO for final mine closure and reclamation costs Asset Retirement Obligations, Mine Close ARO Noncurrent Amount recorded for final mine closure and reclamation costs in asset retirement obligations. Ohio Transmission And Indiana Michigan Transmission Ohio Transmission And Indiana Michigan Transmission [Member] Ohio Transmission And Indiana Michigan Transmission Other Pending Transactions and Accrued Income Defined Benefit Plan, Other Pending Transactions And Accrued Income Including Netting [Member] Other Pending Transactions and Accrued Income. Amount of investment called by warrant Class Of Warrant Or Right, Amount Of Investment Called By Warrants Or Rights Class Of Warrant Or Right, Amount Of Investment Called By Warrants Or Rights Actuarial Loss Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Regulatory Liability [Domain] Regulatory Liability [Domain] Other Changes in Equity Stockholders' Equity, Other Ohio Auction SSO Load Delivery Purchases from Affiliates Ohio Auction SSO Load Delivery Purchases From Affiliates [Member] Ohio Auction SSO Load Delivery Purchases From Affiliates Less: Imputed Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Virginia Retail Consumable Costs Virginia Retail Consumable Costs [Member] Virginia Retail Consumable Costs Dividends (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Dividends in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Dividends in Period Projected Benefit Obligation Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation PJM Costs and Off-system Sales Margin Sharing - Indiana PJM Costs and Off-system Sales Margin Sharing [Member] PJM Costs and Off-system Sales Margin Sharing [Member] Public utilities, approved recovery, amount Public Utilities, Approved Recovery, Period Public Utilities, Approved Recovery, Period PROPERTY, PLANT AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Total Future Minimum Lease Payments Lessee, Operating Lease, Liability, to be Paid Subsidiaries Subsidiaries [Member] Derivative asset, measurement input Derivative Asset, Measurement Input After 5 years through 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Fair value, net derivative asset (liability), recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Dividends Paid to Noncontrolling Interest Common Stock Dividends – Nonaffiliated Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Power Coordination Agreement Power Coordination Agreement [Member] Power Coordination Agreement Intersegment Eliminations Intersegment Eliminations [Member] Expiration Date Trading Arrangement Expiration Date Equity Securities – Mutual Funds Mutual Funds Equity [Member] Mutual Funds Equity Related party transaction, amount Related Party Transaction, Amounts of Transaction Product Information [Line Items] Product Information [Line Items] Foreign Debt Debt Security, Government, Non-US [Member] Requested equity capital structure Public Utilities, Requested Equity Capital Structure, Percentage Nonregulated Property, Plant and Equipment - Net Property, Plant and Equipment, Net Amount recorded in other noncurrent assets for final mine closure and reclamation costs Asset Retirement Obligations, Mine Close Other Assets Noncurrent Amount recorded for final mine closure and reclamation costs in deferred charges and other noncurrent assets. Fowler Ridge 2 Fowler Ridge 2 [Member] Fowler Ridge 2 Accounts Receivable, Net Increase (Decrease) in Accounts Receivable Restructuring Cost [Table] Restructuring Cost [Table] AEP's ownership In OVEC Cost Method Investment Ownership Percentage This item represents the ownership percentage of all cost-method investments. Tax Reform Excess ADIT Reversal Effective Income Tax Rate Reconciliation, Tax Reform, Excess ADIT Reversal, Percentage Effective Income Tax Rate Reconciliation, Tax Reform, Excess ADIT Reversal, Percentage Award payment period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Payment Period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Payment Period U.S. Federal Statutory Tax Rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] Other Other Property Class [Member] Other Property Class Asset Retirement Obligations Asset Retirement Obligations, Noncurrent OVEC-Related Purchased Power OVEC-Related Purchased Power [Member] OVEC-Related Purchased Power State and Local Income Taxes, Net Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Investment Tax Credits Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount Employees participating in voluntary severance program Employees Participating in Voluntary Severance Program Total number of employees participating in voluntary severance program. Regulatory asset, capital tracker incremental revenue requirement Regulatory Asset, Capital Tracker Incremental Revenue Requirement Regulatory Asset, Capital Tracker Incremental Revenue Requirement Distribution Public Utilities, Property, Plant and Equipment, Distribution, Gross Public Utilities, Property, Plant and Equipment, Distribution, Gross Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Issuance of Long-term Debt Proceeds from Issuance of Long-Term Debt Valuation Period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Schedule of Maximum Future Payments for Letters of Credit Issued Under the Uncommitted Facilities Maximum Future Payments for Letters of Credit Uncommitted Facilities [Table Text Block] [Table Text Block] for aep_MaximumFuturePaymentsForLettersOfCreditUncommittedFacilitiesTextBlock [Table] Functional Class of Property [Domain] Functional Class of Property [Domain] Functional Class of Property Number of shares available for grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Restricted Cash Cash [Member] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Performance metric, operating period term Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Metric, Operating Period Term Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Metric, Operating Period Term Interest Rate (USD) Interest Rate Contract [Member] Schedule of Maximum Minimum and Average Interest Rates for Funds Borrowed from and Loaned to AEP Maximum Minimum and Average Interest Rates for Funds Borrowed from and Loaned to AEP [Table Text Block] [Table Text Block] for Tabular disclosure of the maximum and minimum weighted-average interest rate, calculated on a daily basis and the average interest rates of funds borrowed from or loaned to AEP during the period. The Direct Borrowing represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries. Independence Energy Connection Project Independence Energy Connection Project [Member] Independence Energy Connection Project Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] APPALACHIAN POWER COMPANY APCo Appalachian Power Company [Member] Appalachian Power Company Member Antidilutive securities excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] 2027 Long-Term Debt, Maturity, Year Two Other Commitments [Table] Other Commitments [Table] LEASES Lessee, Operating Leases [Text Block] Disposal, assessed fees and related interest Spent Nuclear Fuel Obligation Spent Nuclear Fuel Obligation, Noncurrent Measure: Measure [Axis] Schedule of Jointly-owned Electric Facilities Schedule of Jointly Owned Utility Plants [Table Text Block] Average Loans Average Loans to Money Pool Average Loans to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries. Purchased Electricity, Fuel and Other Consumables Used for Electric Generation Purchased Electricity, Fuel and Other Consumables Used for Electric Generation Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization Disposal Group Classification [Domain] Disposal Group Classification [Domain] Pollution Control Bonds Pollution Control Bonds Long-Term Pollution Control Bond After 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Public Utilities, General Disclosures [Line Items] Public Utilities, General Disclosures [Line Items] Proceeds from Sale of Equity Method Investment Proceeds from Sale of Equity Method Investments Tax Credits Effective Income Tax Rate Reconciliation, Tax Credit, Percent Number of properties Number of Real Estate Properties Schedule of Defined Benefit Plan, Plan Assets, Allocation Defined Benefit Plan, Plan Assets, Allocation [Table Text Block] Beginning balance (in shares) Ending balance (in shares) Common Stock – Shares Issued (in shares) Common Stock, Shares, Issued Deferred Pension and OPEB Costs Deferred Pension and OPEB Costs [Member] Deferred Pension and OPEB Costs Operating Leases Operating Lease, Weighted Average Remaining Lease Term AEP Common Stock Settlements for Career Share Distributions Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Distributions Settlements Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Distributions Settlements Commercially available insurance for catastrophic nature Commercially available insurance for catastrophic nature Commercially available insurance for catastrophic nature. Regulatory Asset Return Disclosure [Axis] Regulatory Asset Return Disclosure [Axis] Regulatory Asset Return Disclosure Axis AEP Texas Transition Funding AEP Texas Central Transition Funding Co [Member] AEP Texas Central Transition Funding Company Variable Interest Entity Member Interest Expense Interest Expense Interest Expense Interest Expense, Nonoperating Transmission Public Utilities, Property, Plant and Equipment, Transmission, Useful Life Total Shareholder Return Amount Total Shareholder Return Amount Security Exchange Name Security Exchange Name Jointly Owned Utility Plant [Domain] Jointly Owned Utility Plant [Domain] Schedule of Accounts Receivable and Accrued Unbilled Revenues Schedule Of Accounts Receivable And Accrued Unbilled Revenues [Table Text Block] Accounts receivable and accrued unbilled revenues under the sale of receivables agreement. DCC Fuel DCC Fuel [Member] DCC Fuel Variable Interest Entity Member Pirkey Plant Accelerated Depreciation - Louisiana Pirkey Plant Accelerated Depreciation - Louisiana [Member] Pirkey Plant Accelerated Depreciation - Louisiana Virginia Clean Economy Act Virginia Clean Economy Act [Member] Virginia Clean Economy Act Line of credit facility, borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity UTM Deferrals UTM Deferrals [Member] UTM Deferrals Years 2031 to 2035, in Total Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt, after Year Five Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Charged to Operating Expenses Charged to Operating Expenses [Member] Charged to Operating Expenses Other Current Liabilities Other Liabilities, Current Schedule of Comparative Accounts Receivable Information Comparative Accounts Receivable Information [Table Text Block] Comparative Accounts Receivable Information Participant Contributions Defined Benefit Plan, Plan Assets, Contributions by Plan Participant Statement [Line Items] Statement [Line Items] Cash and Cash Equivalents Cash and Cash Equivalents Cash and Cash Equivalent Common Stock Common Stock [Member] Vested (in shares) Vested, including unrestricted shares (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Advances from Affiliates Other Short-Term Borrowings Equity Securities - Domestic Equity Security, Domestic [Member] Domestic Member. Statistical Measurement [Domain] Statistical Measurement [Domain] Number of incremental auctions Revenue from Contract with Customer, Number of Incremental Auctions Revenue from Contract with Customer, Number of Incremental Auctions Trust fund assets one time fee obligation for nuclear fuel disposition Trust Fund Assets One Time Fee Obligation for Nuclear Fuel Disposition Trust fund assets one time fee obligation for nuclear fuel disposition. Temporary Equity [Abstract] Temporary Equity [Abstract] Accumulated Depreciation Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation Related Party Transaction [Axis] Related Party Transaction [Axis] Debt Debt, Policy [Policy Text Block] Equity Earnings of Unconsolidated Subsidiaries Equity Earnings (Loss) of Unconsolidated Subsidiaries Income (Loss) from Equity Method Investments Regulatory asset, requested to be financed through securitization, approved Regulatory Asset, Requested To Be Financed Through Securitization, Approved Regulatory Asset, Requested To Be Financed Through Securitization, Approved Changes in fair value allocated to regulated jurisdictions Changes in Fair Value Allocated to Regulated Jurisdiction This element represents total gains or losses for the period (realized and unrealized), arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are allocated to regulated jurisdictions. Schedule of Health Care Trend Rates Schedule of Health Care Cost Trend Rates [Table Text Block] Alternative Revenue Programs Alternative [Member] Alternative [Member] Commercial Paper Commercial Paper [Member] Liabilities: Liabilities, Fair Value Disclosure [Abstract] Liabilities Settled Asset Retirement Obligation, Liabilities Settled Deferred Tax Assets Deferred Tax Assets, Gross TOTAL OTHER COMPREHENSIVE INCOME (LOSS) Other Comprehensive Income (Loss) Other Comprehensive Income Other Comprehensive Income (Loss), Net of Tax Schedule of Reportable Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Total Short-term Debt Short-term Debt – Nonaffiliated Short-term Debt Short-Term Debt Materials and Supplies Materials and Supplies Other Inventory, Supplies, Gross Measurement Input Type [Domain] Measurement Input Type [Domain] Affiliated Entity Affiliated Entity [Member] Regulation Status [Axis] Regulation Status [Axis] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Cash and Cash Equivalents Cash and Cash Equivalents [Member] Meter Replacement Costs Meter Replacement Costs [Member] Meter Replacement Costs Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] State Transcos State Transcos [Member] State Transcos [Member] Pirkey Plant Accelerated Depreciation - Arkansas Pirkey Plant Accelerated Depreciation - Arkansas [Member] Pirkey Plant Accelerated Depreciation - Arkansas Compensation Cost for Share-based Payment Arrangements Share-Based Payment Arrangement, Expense Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Securitization Bonds Secured Debt Costs allocation, average period Revenue from Contract with Customer, Costs Allocation, Average Period Revenue from Contract with Customer, Costs Allocation, Average Period Approved for payment Regulatory Liability, Approved For Payment [Member] Regulatory Liability, Approved For Payment Schedule of Proceeds on Sale of Receivables to AEP Credit Schedule Of Proceeds On Sale Of Receivables To AEP Credit [Table Text Block] Proceeds on sale of receivables to AEP Credit. Provision for Refund Provisions For Rate Refunds, Current Refunds for costs collected in formula rates. TOTAL LIABILITIES AND EQUITY Liabilities and Equity Other Income (Expense): Other Nonoperating Income (Expense) [Abstract] Real Estate Employee Benefit Plan, Real Estate [Member] Gross Property Additions Segment, Expenditure, Addition to Long-Lived Assets Accounting Policies [Abstract] Accounting Policies [Abstract] Public Utility [Axis] Public Utility [Axis] Proportionate ownership share requested to be transferred Jointly Owned Utility Plant, Proportionate Ownership Share Requested To Be Transferred Jointly Owned Utility Plant, Proportionate Ownership Share Requested To Be Transferred Power Purchased From Affiliates Power Purchased From Affiliates [Member] Power Purchased From Affiliates Deferred Cook Plant Life Cycle Management Project Costs - Michigan, FERC Deferred Cook Plant Life Cycle Management Project Costs - Michigan, FERC [Member] Deferred Cook Plant Life Cycle Management Project Costs - Michigan, FERC Defined contribution plan, number of unfunded non-quality pension plans Defined Contribution Plan, Number of Unfunded Non-Quality Pension Plans Defined Contribution Plan, Number of Unfunded Non-Quality Pension Plans Non-Service Cost Components of Net Periodic Benefit Cost Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component Gain (Loss) on Interest Rate Contracts: Derivative, Gain (Loss) on Derivative, Net [Abstract] Fair Value of RSUs Vested and Unrestricted Shares Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Dividends Payable [Line Items] Dividends Payable [Line Items] Revolving Credit Facility, Due March 2027 Revolving Credit Facility, Due March 2027 [Member] Revolving Credit Facility, Due March 2027 Pay vs Performance Disclosure [Line Items] Forward Market Price Measurement Input, Commodity Forward And Market Price [Member] Measurement Input, Commodity Forward And Market Price Money Pool Participant by Company Type [Domain] Money Pool Participant by Company Type [Domain] Money Pool Participant by Company Type [Domain] Amortization of Right-of-Use Assets Finance Lease, Right-of-Use Asset, Amortization Proceeds from noncontrolling interests, gross Proceeds From Noncontrolling Interests, Gross Proceeds From Noncontrolling Interests, Gross Peak Demand Reduction/Energy Efficiency Peak Demand Reduction/Energy Efficiency [Member] Peak Demand Reduction/Energy Efficiency Plant Retirement Costs - Asset Retirement Obligation Costs Plant Retirement Costs - Asset Retirement Obligation Costs [Member] Plant Retirement Costs - Asset Retirement Obligation Costs Regulatory assets expected to be recovered through securitization Regulatory Assets Expected To Be Recovered Through Securitization Regulatory Assets Expected To Be Recovered Through Securitization Company Contributions Defined Benefit Plan, Plan Assets, Contributions by Employer Wheeling Power Company Wheeling Power Company [Member] Wheeling Power Company Change in Other Noncurrent Liabilities Increase (Decrease) in Other Noncurrent Liabilities Distribution Distribution [Member] Distribution Member Retirement Plan Tax Status [Axis] Retirement Plan Tax Status [Axis] TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS Comprehensive Income (Loss), Net of Tax, Attributable to Parent Name Measure Name Cost of Removal Regulatory Liability Regulatory Liability, Cost of Removal The regulatory liability recorded for cost of removal. Term loan Secured Debt [Member] Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table] Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table] Deferred Income Taxes Deferred Income Tax Liabilities, Net Expected Return on Plan Assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets Realized and unrealized gains (losses) included in other comprehensive income Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) Short-term debt, maximum amount outstanding during period Short-Term Debt, Maximum Amount Outstanding During Period Book Value Total Long-term Debt Outstanding Long-term debt Long-Term Debt TOTAL ASSETS Total Assets Total Assets Assets 2021 Arkansas Rate Case 2021 Arkansas Rate Case [Member] 2021 Arkansas Rate Case Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Geographical [Domain] Geographical [Domain] Income Taxes and Investment and Production Tax Credits Income Tax, Policy [Policy Text Block] Other Temporary Investments And Restricted Cash Other Temporary Investments And Restricted Cash [Member] Other Temporary Investments And Restricted Cash OPERATING ACTIVITIES Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] MEMBER’S EQUITY Members' Equity [Abstract] Infrastructure Defined Benefit Plan, Infrastructure [Member] Infrastructure. Other Segment Items Segment Reporting, Other Segment Item, Amount Requested rate increase related to depreciation rates Public Utilities, Requested Rate Increase (Decrease), Amount Related To Depreciation Rates Public Utilities, Requested Rate Increase (Decrease), Amount Related To Depreciation Rates Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Net capacity factor guarantee, measurement period, first start period Public Utilities, Net Capacity Factor Guarantee, Measurement Period, First Tranche Public Utilities, Net Capacity Factor Guarantee, Measurement Period, First Tranche Document Financial Statement Error Correction Document Financial Statement Error Correction [Flag] Investments in Equity Method Investees Equity method investment Equity Method Investments Related Party Related Party [Member] EFFECTS OF REGULATION Schedule of Regulatory Assets and Liabilities [Text Block] Charged to Other Accounts SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account 2031 - 2034 Maturity Period Seven [Member] Schedule of Details of Income Taxes as Reported Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Plan Name [Axis] Plan Name [Axis] Property, Plant and Equipment Property, Plant and Equipment, Policy [Policy Text Block] PEO PEO [Member] Schedule of Contractual Maturities, Fair Value of Debt Securities Investments Classified by Contractual Maturity Date [Table Text Block] Noncash Investing and Financing Activities: Noncash Investing and Financing Items [Abstract] Asset retirement obligations Asset Acquisition, Asset Retirement Obligations Asset Acquisition, Asset Retirement Obligations Income Tax Paid, by Individual Jurisdiction [Line Items] Income Tax Paid, by Individual Jurisdiction [Line Items] Within 1 year Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Eligible Costs [Domain] Eligible Costs [Domain] Eligible Costs [Domain] Closure deadlines for unlined surface impoundments, minimum (in acres) Asset Retirement Obligation, Alternative Closure Deadlines For Unlined Surface Impoundments, Minimum Asset Retirement Obligation, Alternative Closure Deadlines For Unlined Surface Impoundments, Minimum Retained Earnings Retained Earnings [Member] Cash, Cash Equivalents and Restricted Cash at Beginning of Period Cash, Cash Equivalents and Restricted Cash at End of Period Total Cash, Cash Equivalents and Restricted Cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Total Risk Management Assets Fair value, assets Derivative Asset Virginia Fuel Adjustment Clause Virginia Fuel Adjustment Clause [Member] Virginia Fuel Adjustment Clause Noncontrolling Interest Members' Equity Attributable to Noncontrolling Interest Transfers out of Level 3 Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 Dolet Hills Power Station Fuel Costs - Louisiana Dolet Hills Power Station Fuel Costs - Louisiana [Member] Dolet Hills Power Station Fuel Costs - Louisiana NET INCOME Net Income Net Income (Loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Pension and OPEB Funded Status, Net of Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Average Interest Rate for Funds Borrowed Average Interest Rate For Funds Borrowed The average interest rate for funds borrowed from a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries. Cash collateral received from third-parties Securities Received as Collateral Schedule of Property, Plant, and Equipment Under Finance Leases and Noncurrent Assets Under Operating Leases Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee Income Tax Paid, by Individual Jurisdiction [Table] Income Tax Paid, by Individual Jurisdiction [Table] Allowance for Equity Funds Used During Construction Allowance for Equity Funds Used During Construction Allowance for equity funds used during construction Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity Schedule of Regulatory Asset, Proposed Securitization Items Regulatory Asset, Proposed Securitization Items [Table Text Block] Regulatory Asset, Proposed Securitization Items City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Variable Interest Entities [Abstract] Variable Interest Entities [Abstract] Net Deferred Tax Liabilities Deferred Tax Liabilities, Net INVESTING ACTIVITIES Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Defined Contribution, Employer Matching Contributions [Axis] Defined Contribution, Employer Matching Contributions [Axis] Defined Contribution, Employer Matching Contributions Settlement agreement equity capital structure Settlement Agreement Equity Capital Structure Settlement Agreement Equity Capital Structure Performance Shares Earned (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Shares Earned Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Shares Earned Related Party Transactions Related Party Transactions [Abstract] Equity securities, fair value disclosure Equity Securities, FV-NI Base Rate Period [Axis] Base Rate Period [Axis] Base Rate Period Regulated Operation Regulated Operation [Member] Fair Value of Plan Assets Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets Pirkey Station Pirkey Plant [Member] Pirkey Plant Unbilled Receivables Related to Securitization Unbilled Receivables Related to Securitization, Sale of Accounts Receivable The amount of revenue for work performed for which billing has not occurred related to securitization of accounts receivable. Total Retail Revenues Retail Revenues Retail [Member] First year revenue requirement Public Utilities, First Year Revenue Requirement Public Utilities, First Year Revenue Requirement Pension Plans and OPEB Benefit Payments Defined Benefit Plan, Expected Future Benefit Payment [Abstract] Remaining Refund Period Regulatory Liability, Amortization Period Performance metric, relative total shareholder return, weight Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Metric, Relative Total Shareholder Return, Weight Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Metric, Relative Total Shareholder Return, Weight Net Book Value Net Regulatory Assets SUPPLEMENTARY INFORMATION Cash Paid for: Supplemental Cash Flow Information [Abstract] Beginning balance Ending balance Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Schedule of FERC Annual Revenue Requirement FERC Annual Revenue Requirement [Table Text Block] FERC Annual Revenue Requirement Other Performance Measure, Amount Other Performance Measure, Amount Schedule of Restrictions on Cash and Cash Equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Midwest Transmission Holdings Noncontrolling Interest Transaction Noncontrolling Interest, Increase from Sale of Parent Equity Interest Related Party [Domain] Related and Nonrelated Parties [Domain] Other Current Liabilities Other Current Liabilities [Member] Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation Performance Score Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Certified Performance Score Certified Performance Score as approved by Human Resources Committee of the Board of Directors. Valuation of Nonderivative Financial Instruments and Fair Value Measurements of Assets and Liabilities Fair Value of Financial Instruments, Policy [Policy Text Block] Assessed amount per nuclear incident Assessed amount per nuclear incident Assessed amount per nuclear incident. Guarantees of mine reclamation amount Guarantees Of Mine Reclamation Amount Guarantees of mine reclamation, amount. As Reported on the Balance Sheet Investments in Unconsolidated Subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures 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] Long-term Risk Management Assets Long-term Risk Management Assets Derivative Asset, Noncurrent Cash Paid for Interest, Net of Capitalized Amounts Interest, Net of Capitalized Amounts Interest Paid, Excluding Capitalized Interest, Operating Activity Operating Lease Assets Operating Lease, Right-of-Use Asset Effective Income Tax Rate Effective Income Tax Rate Reconciliation, Percent Operating Lease Cost Operating Lease, Cost Period ending February 29, 2024 Base Rate Increase, Period One [Member] Base Rate Increase, Period One Plan Name [Domain] Plan Name [Domain] FERC Matter [Domain] FERC Matter [Domain] FERC Matter Valuation Allowance Deferred Tax Assets, Valuation Allowance Remeasurement of Excess ADIT Effective Income Tax Rate Reconciliation, Remeasurement Of Excess ADIT, Amount Effective Income Tax Rate Reconciliation, Remeasurement Of Excess ADIT, Amount Current Current Federal Tax Expense (Benefit) Increase (Decrease) in Stockholders' Equity [Roll Forward] Issued Increase (Decrease) in Stockholders' Equity [Roll Forward] North Central Wind Energy Facilities North Central Wind Energy Facilities [Member] North Central Wind Energy Facilities Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] COMPREHENSIVE INCOME Comprehensive Income (Loss) Note [Text Block] Weighted Average Weighted Average [Member] AEP TRANSMISSION COMPANY, LLC AEPTCo AEP Transmission Company, LLC [Member] AEP Transmission Company, LLC Restricted Cash Restricted Cash for Securitized Funding Restricted Cash and Cash Equivalent, Current Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Issuance of Short-term Debt with Original Maturities greater than 90 Days Proceeds from Short-Term Debt, Maturing in More than Three Months ETT ETT [Member] ETT [Member] Recovery of costs, approved Public Utilities, Recovery Of Costs, Approved Public Utilities, Recovery Of Costs, Approved Schedule of Maximum, Minimum and Average Interest Rates for Funds Borrowed from and Loaned to the Nonutility Money Pool Schedule Of Maximum Minimum Average Interest Rates For Funds Borrowed From Loaned To Nonutility Money Pool [Table Text Block] Tabular disclosure of the maximum and minimum weighted-average interest rate, calculated on a daily basis and the average interest rates of funds borrowed from or loaned to a Nonutility Money Pool during the period.The Nonutility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain nonutility subsidiaries. Arrangement Duration Trading Arrangement Duration Derivative, gain (loss), statement of income or comprehensive income Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Expected Volatility Maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Securitized Debt Securitized Debt [Member] Securitized Debt Environmental Response Compensation and Liability Act (Superfund) and State Remediation Environmental Response Compensation and Liability Act (Superfund) and State Remediation [Member] Environmental Response Compensation and Liability Act (Superfund) and State Remediation STOCK-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Number of lines of insurance for protected cells Number of Lines of Insurance For Protected Cells Number of Lines of Insurance For Protected Cells Natural Gas (MMBtus) Natural Gas Contract [Member] Nominal energy measure used to calculate payments on a derivative instrument. Schedule of Interest Expense Incurred For Funds Borrowed from Utility Money Pool Interest Expense Incurred For Funds Borrowed from Utility Money Pool [Table Text Block] Interest Expense Incurred For Funds Borrowed from Utility Money Pool ASSETS Assets [Abstract] 2029 Finance Lease, Liability, to be Paid, Rolling Year Four Alternative Investments Defined Benefit Plan, Alternative Investments [Member] Alternative Investments. Construction Work in Progress Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress Removal Costs Effective Income Tax Rate Reconciliation, Removal Costs, Percent Effective Income Tax Rate Reconciliation, Removal Costs, Percent Liability coverage under Price Anderson Act Liability coverage under Price Anderson Act Liability coverage under the Price-Anderson Act. Net capacity factor guarantee, full period under coverage Public Utilities, Net Capacity Factor Guarantee, Full Period Under Coverage Public Utilities, Net Capacity Factor Guarantee, Full Period Under Coverage Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Risk Management Liabilities Current Risk Management Liabilities Derivative Liability, Current Obligations Under Operating Leases Noncurrent Liability Operating Lease, Liability, Noncurrent Voluntary severance program, number of weeks of base pay, annual service benchmark Voluntary Severance Program, Number Of Weeks Of Base Pay, Annual Service Benchmark Voluntary Severance Program, Number Of Weeks Of Base Pay, Annual Service Benchmark AEP Subsidiaries AEP Subsidiaries [Member] AEP Subsidiaries Base Rate [Axis] Base Rate [Axis] Base Rate Axis. Net of Tax AOCI Accumulated Other Comprehensive Income (Loss), Net Of Tax [Member] Net of Tax Aoci. 2028 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Three 2030 Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt, Year Five Net Loans to (Borrowings from) Borrowings Net Loans to (Borrowings from) the Utility Money Net Loans to (Borrowings from) the Utility Money Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] FTRs Financial Trasnsmission Rights [Member] Risk management commodity contracts whose primary underlying risk is tied financial transmission rights. Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Retained earnings available to pay dividends Retained Earnings, Unappropriated 2026 Oklahoma Base Rate Case 2026 Oklahoma Base Rate Case [Member] 2026 Oklahoma Base Rate Case 2026 Lessee, Operating Lease, Liability, to be Paid, Next Rolling 12 Months Requested recovery, intervenor proposed reduction Regulatory Asset, Requested Recovery Of Eligible Costs, Proposed Reduction Regulatory Asset, Requested Recovery Of Eligible Costs, Proposed Reduction Incremental auction term Revenue from Contract with Customer, Incremental Auction Term Revenue from Contract with Customer, Incremental Auction Term Unrecovered Winter Storm Fuel Costs Unrecovered Winter Storm Fuel Costs [Member] Unrecovered Winter Storm Fuel Costs All Other State and Local Tax Jurisdiction, Other [Member] Total Assets Assets, Fair Value Disclosure Renewable Resource Rider Renewable Resource Rider [Member] Renewable Resource Rider Storm-Related Costs Deferred Storm Other Operation and Maintenance Expense Regulatory Assets Storm Costs [Member] Schedule of Long-term Debt Schedule of Debt [Table Text Block] Reconciling Adjustments Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] G&M Generation And Marketing [Member] Generation And Marketing [Member] AEPTHCo AEP Transmission Holdco [Member] AEP Transmission Holdco. Other Noncurrent Liabilities Other Noncurrent Liabilities [Member] Accounts Receivable Accounts Receivable [Member] TOTAL MEMBER’S EQUITY Members' Equity Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] State and Local: Income Tax Expense (Benefit), Continuing Operations [Abstract] Annual increase april 1st surcharge, proposed filing period Annual Increase April 1st Surcharge, Proposed Filing Period Annual Increase April 1st Surcharge, Proposed Filing Period Commercial Revenues Commercial [Member] Retail revenues from the commercial class. Asset acquisition, intangible liability Asset Acquisition, Intangible Liability Asset Acquisition, Intangible Liability Interest expense Interest Expense, Debt Jointly Owned Utility Plant [Axis] Jointly Owned Utility Plant [Axis] INDIANA MICHIGAN POWER COMPANY I&M Indiana Michigan Power Company [Member] Indiana Michigan Power Company Member Short-Term Debt [Table] Short-Term Debt [Table] Fuel and Purchased Power Adjustment Rider Fuel and Purchased Power Adjustment Rider [Member] Fuel and Purchased Power Adjustment Rider Asset retirement obligation, approved recovery amount Asset Retirement Obligation, Approved Recovery Amount Asset Retirement Obligation, Approved Recovery Amount Disposition of Competitive Contracted Renewables Portfolio Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Schedule of Share-Based Payment Arrangement, Activity Share-Based Payment Arrangement, Activity [Table Text Block] Assumption Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Increase in Generation Property Increase in Generation Property [Member] Increase in Generation Property Name Awards Close in Time to MNPI Disclosures, Individual Name Performance Shares to be Settled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Shares To Be Settled Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Shares To Be Settled Property Related Temporary Differences Deferred Tax Assets (Liabilities), Property Related Temporary Differences The difference between the tax basis and the carrying amount of an asset or liability in the financial statements prepared in accordance with GAAP that will result in taxable amounts in one or more future periods related to property related temporary differences. Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Regulatory Assets Total Noncurrent Regulatory Assets Regulatory Asset, Noncurrent Money Pool Participant by Company Type 2 [Domain] Money Pool Participant by Company Type 2 [Domain] Money Pool Participant by Company Type 2 [Domain] Clean Affordable Reliable Coalition (CARE) Clean Affordable Reliable Coalition (CARE) [Member] Clean Affordable Reliable Coalition (CARE) Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Interest Income Earned on Advances to the Money Pool Interest Income Earned on Advances to the Money Pool Interest Income Earned on Advances to the Money Pool Subtotal Fixed Income Securities Fixed Income Funds [Member] Defined Contribution Plan Disclosure [Line Items] Defined Contribution Plan Disclosure [Line Items] Credit facilities, total Credit Facilities Structured Amount of revolving credit facilities. Auditor Firm ID Auditor Firm ID Segments [Domain] Segments [Domain] Schedule of Carrying Amount and Classification of Variable Interest in Accounts Payable Carrying Amount and Classification of Variable Interest in Accounts Payable [Table Text Block] The carrying amount and classification of variable interest in accounts payable. Schedule of Fixed Performance Obligations Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Investment in Partnership Deferred Tax Liabilities, Investments Statement of Financial Position Location, Balance [Domain] Statement of Financial Position Location, Balance [Domain] Fuel, Materials and Supplies Materials and Supplies Increase (Decrease) in Inventories Percentage of VIE management fee received Percentage Of VIE Management Fee Received Percentage of management fee received by SWEPCo from DHLC. Period September 2024 through August 2025 Base Rate Increase, Period Two [Member] Base Rate Increase, Period Two Average Interest Rate for Funds Loaned Average Interest Rate For Funds Loaned The average interest rate for funds loaned to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries. Other Credits Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent APCo APCo Portion [Member] APCo Portion Earnings Per Share (EPS) Earnings Per Share, Policy [Policy Text Block] Construction Expenditures Payments for Construction in Process Senior Unsecured Notes Senior Notes [Member] Gross Amounts Offset Derivative Liability, Subject to Master Netting Arrangement, Asset Offset State and Local Government US States and Political Subdivisions Debt Securities [Member] Defined Contribution Plan [Table] Defined Contribution Plan [Table] All Executive Categories All Executive Categories [Member] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of Underfunded Projected Benefit Obligation Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets [Table Text Block] Common Stock Common Stock, Value, Issued Estimated final cost mine reclamation Mine Reclamation and Closing Liability, Noncurrent Title and Position [Axis] Title and Position [Axis] Minimum Interest Rate Minimum Interest Rate The minimum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, either borrowed from or loaned to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries. Regulatory Assets or Liability, Return Status [Domain] Regulatory Assets or Liability, Return Status [Domain] Regulatory Assets or Liability, Return Status [Domain] Cross-acceleration provisions, maximum third-party obligation, amount Cross Acceleration Provisions Maximum Third Party Obligation Amount Cross Acceleration Provisions Maximum Third Party Obligation Amount Common Collective Trusts Common Collective Trust [Member] Other Fair Value Measured at Net Asset Value Per Share [Member] TOTAL COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Other Long-term Debt Other Long-Term Debt Generation Revenues Wholesale Revenues - Generation Wholesale Generation [Member] Wholesale Generation. Direct Purchases from AEGCo Unit Power Agreement Purchases From AEGCo [Member] Purchases from AEGCo. Ownership percentage Equity Method Investment, Ownership Percentage NEW ACCOUNTING STANDARDS Accounting Standards Update and Change in Accounting Principle [Text Block] Public utilities, net annual revenue decrease Public Utilities, Net Annual Revenue Decrease Public Utilities, Net Annual Revenue Decrease Ohio Basic Transmission Cost Rider Ohio Basic Transmission Cost Rider [Member] Ohio Basic Transmission Cost Rider Bad Debt Reserves Related to Securitization Bad Debt Reserves Related to Securitized Sale of Accounts Receivable A valuation allowance for securitized receivables that are expected to be uncollectible. Revenue from Contract with Customer [Abstract] ENEC Under-Recovery Regulatory Assets Unrecovered ENEC Balance [Member] Unrecovered ENEC Balance Other Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment AOCI Gain (Loss) Net of Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Storm-Related Costs - West Virginia Storm-Related Costs - West Virginia [Member] Storm-Related Costs - West Virginia Derivative Contract [Domain] Derivative Contract [Domain] Issuance of Common Stock, Net Proceeds from issuance of common stock Proceeds from Issuance of Common Stock 2030 Defined Benefit Plan, Expected Future Benefit Payment, Year Five Other than temporary impairments Debt Securities, Available-for-Sale, Realized Loss Acquisition of Nuclear Fuel Included in Current Liabilities as of December 31, Payments for Nuclear Fuel During Noncash or Partial Noncash Transaction Future cash outflow to pay for acquired nuclear fuel. Ohio Municipal Ohio Municipal [Member] Ohio Municipal [Member] Contingent financial obligation for mutual insurance Contingent financial obligation for mutual insurance Contingent financial obligation for mutual insurance. Payments to acquire facilities Payments to Acquire Property, Plant, and Equipment Mark-to-Market of Risk Management Contracts Unrealized Gain (Loss) on Derivatives Expiration period Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period 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] Postemployment Benefits Postemployment Benefits [Member] Postemployment Benefits Shares available for grant, reduction rate Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Available for Grant, Reduction Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Available for Grant, Reduction Rate Deferred Fuel Costs Capitalization and Amortization of Fuel Costs, Policy [Policy Text Block] Investment Tax Credits Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent Deferred Property Taxes Deferred Property Taxes, Noncurrent Deferred Property Taxes, Noncurrent Maximum length of time to hedge exposure to variability Maximum Length of Time Hedged in Price Risk Cash Flow Hedge Insurance protection for public liability arising from nuclear incident Insurance protection for public liability arising from nuclear incident Insurance protection for public liability arising from a nuclear incident. Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Cross-default trigger, maximum third party obligation, amount Cross Default Provisions Maximum Third Party Obligation Amount Non-exchange traded commodity contracts containing cross-default provisions ATM Offering Program ATM Offering Program [Member] ATM Offering Program Acquisitions of Nuclear Fuel Payments for Nuclear Fuel Schedule of Impact of Fair Value Hedges on Balance Sheet Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Requested rate increase related to ROE and capital structure Public Utilities, Requested Rate Increase (Decrease), Amount Related To Proposed ROE And Capital Structure Public Utilities, Requested Rate Increase (Decrease), Amount Related To Proposed ROE And Capital Structure Turk Generating Plant Turk Generating Plant [Member] Turk Generating Plant Member Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Title of 12(b) Security Title of 12(b) Security Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Settlement of decommissioning liabilities Asset Retirement Obligation, Legally Restricted Assets, Fair Value Schedule of Consolidated Assets and Liabilities of Variable Interest Entities Consolidated Assets And Liabilities Of Variable Interest Entities [Table Text Block] Schedule of consolidated assets and liabilities of variable interest entities. Levelization of Nuclear Refueling Outage Costs Levelization Of Nuclear Refueling Outage Costs [Policy Text Block] Policy for deferring incremental operating and maintenance costs during a refueling for amortization over the fuel burn cycle. Wind Energy, LLC Wind Energy, LLC [Member] Wind Energy, LLC Regulatory liabilities, not subject to rate normalization requirements, refund period Regulatory Liability, Not Subject to Rate Normalization Requirements, Refund Period Regulatory Liability, Not Subject to Rate Normalization Requirements, Refund Period Regulatory asset, number of recovery mechanisms Regulatory Asset, Number Of Recovery Mechanisms Regulatory Asset, Number Of Recovery Mechanisms NOCL - Costs NOCL - Costs [Member] NOCL - Costs Electric Generation, Transmission and Distribution Revenues Electric Generation Transmission Distribution Revenues [Member] Electric Generation, Transmission and Distribution Revenues. Net Periodic Benefit Cost (Credit) Recognized in Expense Pension and Other Postretirement Benefits Cost (Reversal of Cost) Billings from VIE Billings From VIE Billings from VIE. Eligible costs deferred Regulatory Assets, Eligible Costs Deferred Regulatory Assets, Eligible Costs Deferred Provision for Refund Provisions For Rate Refunds, Noncurrent Provisions For Rate Refunds, Noncurrent Unrealized gain (loss) included in net income (or changes in net assets) relating to assets still held at the reporting date Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss) Schedule of Nonutility Money Pool Activity Nonutility Money Pool Activity [Table Text Block] Tabular disclosure of a Nonutility Money Pool participants' money pool activity including: (1) Maximum Borrowings from Nonutility Money Pool; (2) Maximum Loans to Nonutility Money Pool; (3) Average Borrowings from Nonutility Money Pool; (4) Average Loans to Nonutility Money Pool; (5) Net Loans (Borrowings) to/from Nonutility Money Pool as of the balance sheet date. The Nonutility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain nonutility subsidiaries. After 2030 Finance Lease, Liability, to be Paid, after Rolling Year Five Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Schedule of Dividend Repayment Restrictions Schedule Of Dividend Repayment Restrictions [Table Text Block] Schedule Of Dividend Repayment Restrictions Actuarial Gain (Loss) During the Year Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Production Tax Credits Effective Income Tax Rate Reconciliation, Tax Credit, Energy-Related, Percent Unamortized Loss on Reacquired Debt Loss on Reacquired Debt [Member] Regulatory Liabilities Regulatory Liability, Noncurrent [Member] Regulatory Liability, Noncurrent Award Timing Disclosures [Line Items] Schedule of Asset Retirement Obligation (ARO) Schedule of Change in Asset Retirement Obligation [Table Text Block] Maximum Potential Loss Max Potential Loss on Master Lease Agreements Maximum potential loss on master lease agreements. Other Regulatory Liabilities Approved for Payment Other Regulatory Liabilities Approved For Payment [Member] Other Regulatory Liabilities Approved For Payment Maximum Interest Rate for Funds Loaned Maximum Interest Rate For Funds Loaned The maximum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, loaned during the period. Transmission Public Utilities, Property, Plant and Equipment, Transmission Deferred Deferred State and Local Income Tax Expense (Benefit) NET INCOME Net Income Net Income Net Income (Loss) Attributable to Parent Subsidiary or Equity Method Investee [Line Items] Subsidiary or Equity Method Investee [Line Items] 2017-2019 Virginia Triennial Revenue Provision Virginia Triennial Revenue Provision [Member] Virginia Triennial Revenue Provision NONCURRENT LIABILITIES Liabilities, Noncurrent [Abstract] Regulatory asset, not subject to rate normalization requirements, amount Regulatory Asset, Not Subject to Rate Normalization Requirements. Amount Regulatory Asset, Not Subject to Rate Normalization Requirements. Amount Under recovered costs disallowance Public Utilities, Under-Recovered Costs Disallowance Public Utilities, Under-Recovered Costs Disallowance Schedule of Reconciliation of Federal Statutory Tax Rate to Reported Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Vesting period Vesting Period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Deferred Income Taxes Deferred Income Tax Liabilities, Net [Member] Deferred Income Taxes. Green Country Green Country Energy, LLC [Member] Green Country Energy, LLC Restrictions on Cash and Cash Equivalents [Table] Restrictions on Cash and Cash Equivalents [Table] Adoption Date Trading Arrangement Adoption Date Shares to be converted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Conversion Share Based Compensation Performance Units Converted to Shares. Borrowings Borrowings from Parent Borrowings from Parent at period end. Parent represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries. Customer [Axis] Customer [Axis] OPERATING INCOME Operating Income (Loss) Retained Earnings Retained Earnings (Accumulated Deficit) Decommissioning trust assets amount Decommissioning Fund Investments, Fair Value Requested annual increase without securitization Requested Annual Increase Without Securitization Requested Annual Increase Without Securitization Reversal of Origination Flow-Through Effective Income Tax Rate Reconciliation, Reversal Of Origination Flow-Through, Percent Effective Income Tax Rate Reconciliation, Reversal Of Origination Flow-Through, Percent 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] NOLC Costs - Indiana NOLC Costs - Indiana [Member] NOLC Costs - Indiana New Mexico Renewable Development New Mexico Renewable Development [Member] New Mexico Renewable Development Less Than 1 Year Recorded Unconditional Purchase Obligation, to be Paid, Year One Maximum Interest Rate for Funds Borrowed Maximum Interest Rate for Funds Borrowed The maximum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, borrowed during the period. Cash Flow Hedges Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Restricted net assets Restricted Net Assets A segregation of retained earnings which is unavailable for dividend distribution. T&D T&D Transmission And Distribution Companies [Member] Transmission And Distribution Companies [Member] Cook Plant Nuclear Refueling Outage Levelization Cook Nuclear Plant Refueling Outage Levelization [Member] Cook Nuclear Plant Refueling Outage Levelization Member. Loss on disposal of business, net of tax Gain (Loss) on Disposition of Business net of Tax Gain (Loss) on Disposition of Business net of Tax AEP Texas Transition and Restoration Funding AEP Texas Transition Funding and Restoration Funding [Member] AEP Texas Transition and Restoration Funding [Member] Fixed Income Securities – Mutual Funds Mutual Funds Fixed Income [Member] Mutual Funds Fixed Income FINANCING ACTIVITIES Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Non-Taxable or Non-Deductible Items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Order entered in mandated period Public Utilities, Order Entered In Mandated Period Public Utilities, Order Entered In Mandated Period Mitchell & Mountaineer Plants Mitchell & Mountaineer Plants [Member] Mitchell & Mountaineer Plants Noncurrent Liability Finance Lease, Liability, Noncurrent Vertically Integrated Utilities Revenues Electricity [Member] Actual Tax Benefit Share-Based Payment Arrangement, Expense, Tax Benefit OPEB Other Postretirement Benefits Plan [Member] Defined Contribution, Employer Matching Conditions Two Defined Contribution, Employer Matching Conditions Two [Member] Defined Contribution, Employer Matching Conditions Two Net Uncollectible Accounts Receivable Written Off Net Uncollectible Accounts Receivable Written Off Net uncollectible accounts receivable written off. Settlement changes, period after approval Public Utilities, Settlement Changes, Period After Approval Public Utilities, Settlement Changes, Period After Approval Maintenance Utilities Operating Expense, Maintenance Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Cash and Cash Equivalents Cash and Cash Equivalents, Unrestricted Cash and Cash Equivalents, Policy [Policy Text Block] Types of Related Party Revenue [Axis] Types of Related Party Revenue [Axis] Dividends Payable [Table] Dividends Payable [Table] Annual Rider Revenue Requirements Annual Rider Revenue Requirements [Member] Annual Rider Revenue Requirements WEIGHTED AVERAGE NUMBER OF BASIC AEP COMMON SHARES OUTSTANDING (in shares) Weighted-Average Number of Basic AEP Common Shares Outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Functional Class of Property [Axis] Functional Class of Property [Axis] Functional Class of Property - including Generation, Transmission, Distribution and Other Contingent consideration, additional investment in equity method investment Contingent Consideration, Payments To Acquire Equity Method Investments, Maximum Contingent Consideration, Payments To Acquire Equity Method Investments, Maximum Related Party Transaction [Domain] Related Party Transaction [Domain] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Storm Reserve Storm Reserve, Noncurrent Storm Reserve, Noncurrent Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Trusted Owned Life Insurance Defined Benefit Plan, Trusted Owned Life Insurance [Member] Trusted Owned Life Insurance Member PROPERTY, PLANT AND EQUIPMENT PROPERTY, PLANT AND EQUIPMENT Property, Plant and Equipment, Gross [Abstract] Virginia 2021 & 2022 Fuel Cost Review Periods Virginia 2021 & 2022 Fuel Cost Review Periods [Member] Virginia 2021 & 2022 Fuel Cost Review Periods Total Liabilities Offsetting Derivative Liabilities [Abstract] Restructuring and Related Activities [Abstract] Texas Transmission Cost Recovery Factor Texas Transmission Cost Recovery Factor [Member] Texas Transmission Cost Recovery Factor Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Cook Plant Cook Plant [Member] Cook Plant Years 2031 to 2035, in Total Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Residential Revenues Residential [Member] Retail revenues from the residential class. AEP OnSite Partners AEP OnSite Partners [Member] AEP OnSite Partners Money Pool Participant by Company Type 2 [Axis] Money Pool Participant by Company Type 2 [Axis] Money Pool Participant by Company Type 2 All Other, Net Deferred Tax Assets (Liabilities), All Other, Net The total of all other differences not specifically indicated elsewhere between the tax basis and the carrying amount of an asset or liability in the financial statements prepared in accordance with GAAP that will result in taxable amounts in one or more future periods. Number of uncommitted facilities Debt Instrument, Number Of Uncommitted Facilities Debt Instrument, Number Of Uncommitted Facilities Voluntary severance program, number of base pay, payout period Voluntary Severance Program, Number Of Base Pay, Payout Period Voluntary Severance Program, Number Of Base Pay, Payout Period Operating Cash Flows Used for Finance Leases Finance Lease, Interest Payment on Liability Other Current Liabilities – Accrued Short-term Benefit Liability Liability, Defined Benefit Plan, Current Current Liabilities Current Liabilities [Member] Current Liabilities Construction Work in Progress Construction in Progress, Gross Total Current Regulatory Liabilities Regulatory Liability, Current 2023 Kentucky Base Rate and Securitization Case 2023 Kentucky Base Rate and Securitization Case [Member] 2023 Kentucky Base Rate and Securitization Case Interest Income Investment Income, Interest and Dividend Fuel Inventory, Raw Materials, Gross Other Revenues Product and Service, Other [Member] TOTAL LIABILITIES Liabilities Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Dividends Paid on Noncontrolling Interest Dividends Paid on Common Stock – Nonaffiliated Payments of Ordinary Dividends, Noncontrolling Interest Commodity Contract, Cash Flow Hedging Commodity Contract, Cash Flow Hedging [Member] Commodity Contract, Cash Flow Hedging Generation Generation Public Utilities, Property, Plant and Equipment, Generation or Processing, Gross Public Utilities, Property, Plant and Equipment, Generation or Processing, Gross Pending final regulatory approval Regulatory Assets, Pending Final Approval [Member] Regulatory Assets, Pending Final Approval Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Costs allocation, number of transmission assets Revenue from Contract with Customer, Costs Allocation, Number Of Subsidiaries Revenue from Contract with Customer, Costs Allocation, Number Of Subsidiaries Marketing Arrangements Marketing Arrangements [Member] Marketing Arrangements Expected contributions and payments during the next fiscal year Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Unregulated Operation Unregulated Operation [Member] Plant Retirement Costs - Unrecovered Plant - Arkansas, Louisiana Plant Retirement Costs - Unrecovered Plant, Arkansas [Member] Plant Retirement Costs - Unrecovered Plant, Arkansas Assets including netting Assets Including Netting, Fair Value Disclosure Assets Including Netting, Fair Value Disclosure Issuance of Common Stock Stock Issued During Period, Value, New Issues Other – Asset Backed Asset-Backed Securities [Member] Unamortized Discount, Net and Debt Issuance Costs Unamortized Debt Issuance Expense Excise Taxes Excise Tax, Policy [Policy Text Block] Describes an entity's accounting policy for excise taxes. Schedule of Significant Unobservable Inputs for Level 3 Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block] Counterparty Name [Axis] Counterparty Name [Axis] Schedule of Share-Based Payment Arrangement, Restricted Stock Unit, Activity Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Forecasted Undepreciated CCR and ELG Investments of Amos, Mitchell and Mountaineer (as of November 30, 2024) Environmental Restoration Costs [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Funded (Underfunded) Status Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position Rockport Plant, Unit 2 Accelerated Depreciation for Leasehold Improvements Rockport Plant, Unit 2 Accelerated Depreciation for Leasehold Improvements [Member] Rockport Plant, Unit 2 Accelerated Depreciation for Leasehold Improvements Renewable Energy Credits Emission Credits or Allowances, Policy [Policy Text Block] Approximate OVEC generating capacity (MWs) Utility Plant Generation Capacity Generating capacity of utility plants. Reclassification of KPCo Pension and OPEB Regulatory Assets, Net of Tax Other Comprehensive (Income) Loss, Defined Benefit Plan Including Regulatory Assets, Reclassification Adjustment from AOCI, after Tax Other Comprehensive (Income) Loss, Defined Benefit Plan Including Regulatory Assets, Reclassification Adjustment from AOCI, after Tax Gross Realized Gains on Investment Sales Realized Investment Gains (Losses) Does not pay/paying a return Regulatory Liability, Not Pay A Return [Member] Regulatory Liability, Not Pay A Return Award Timing Predetermined Award Timing Predetermined [Flag] NMRD NMRD [Member] NMRD Paid-in Capital Additional Paid-in Capital [Member] Number of performance metrics Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Performance Metrics Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Performance Metrics Tax Credits Effective Income Tax Rate Reconciliation, Tax Credit, Amount Regulatory Assets or Liability, Regulatory Status [Axis] Regulatory Assets or Liability, Regulatory Status [Axis] Regulatory Assets or Liability, Regulatory Status Tabular List, Table Tabular List [Table Text Block] Finance Lease Cost: Finance Leases Finance Lease, Liability [Abstract] Purchases of Investments Payments to Acquire Short-Term Investments Pension Contributions to Qualified Plan Trust Payment for Pension Benefits Construction Expenditures Included in Current Liabilities as of December 31, Construction Expenditures Included in Current Liabilities as of December 31, Construction in Progress Expenditures Incurred but Not yet Paid Related party transaction, agreement term with counterparty Related Party Transaction, Agreement Term With Counterparty Related Party Transaction, Agreement Term With Counterparty Minimum Interest Rate For Funds Borrowed Minimum Interest Rate For Funds Borrowed The minimum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, borrowed during the period. Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] Measurement Basis [Axis] Measurement Basis [Axis] Schedule of Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool Schedule Of Average Interest Rates For Funds Borrowed From And Loaned To Utility Money Pool [Table Text Block] Tabular disclosure of the average interest rates for funds borrowed from and loaned to a Utility Money Pool. The Utility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain utility subsidiaries. Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] RATE MATTERS Public Utilities Disclosure [Text Block] Defined benefit plan, concentration limits, cash equivalents of investment manager's equity portfolio, percentage Defined Benefit Plan, Concentration Limits, Cash Equivalents of Investment Manager's Equity Portfolio, Percentage Defined Benefit Plan, Concentration Limits, Cash Equivalents of Investment Manager's Equity Portfolio, Percentage Solid Oxide Fuel Cells Solid Oxide Fuel Cells [Member] Solid Oxide Fuel Cells Award performance score, higher Share-Based Compensation Arrangement by Share-Based Payment Award, Award Performance Score, Higher Share-Based Compensation Arrangement by Share-Based Payment Award, Award Performance Score, Higher Change in Short-term Debt with Original Maturities less than 90 Day, Net Change in Short-term Debt – Nonaffiliated Proceeds from (Repayments of) Short-Term Debt, Maturing in Three Months or Less Competitive Retail And Offtake Arrangements For Renewable Assets Range Competitive Retail And Offtake Arrangements For Renewable Assets Range [Member] Competitive Retail And Offtake Arrangements For Renewable Assets Range Principles of Consolidation Consolidation, Policy [Policy Text Block] Depreciation and Amortization Total Depreciation and Amortization Depreciation and Amortization Depreciation and Amortization Utilities Operating Expense, Depreciation and Amortization Securitized Assets Securitized Regulatory Transition Assets, Noncurrent Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Percent Effective Income Tax Rate Reconciliation, Percent [Abstract] Intrinsic Value of RSUs Vested and Unrestricted Shares Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested TOTAL COMMON SHAREHOLDER’S EQUITY Beginning balance Ending balance Equity, Attributable to Parent Insider Trading Policies and Procedures [Line Items] Spent Nuclear Fuel Spent Nuclear Fuel Liability [Member] Spent Nuclear Fuel Liability Other Current Liabilities Increase (Decrease) in Other Current Liabilities Securitized Assets Deferred Tax Assets (Liabilities), Securitized Assets The difference between the tax basis and the carrying amount of an asset or liability in the financial statements prepared in accordance with GAAP that will result in taxable amounts in one or more future periods related to carrying value of a regulatory asset that represents capitalized stranded costs that have been securitized (financed with debt). Concentrations of Credit Risk and Significant Customers Concentration Risk, Credit Risk, Policy [Policy Text Block] Maximum percentage paid to selling agents Maximum Percentage Paid to Selling Agents Maximum percentage of gross offering proceeds of the shares sold which is paid to selling agents with respect to each equity distribution agreement. State and Local Government State and Local Jurisdiction [Member] Cover [Abstract] Cash and cash equivalents, fair value disclosure Cash and Cash Equivalents, Fair Value Disclosure Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum High Maximum [Member] Recognition of Pension Settlement Costs Accumulated Defined Benefit Plans Adjustment, Pension Settlement Costs Attributable To Parent [Member] Accumulated Defined Benefit Plans Adjustment, Pension Settlement Costs Including Portion Attributable To Noncontrolling Interest Pension and OPEB Funded Status, Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax Virginia Under Earnings Virginia Under Earnings [Member] Virginia Under Earnings Total MTM Derivative Contract Net Assets (Liabilities) Recognized Derivative Asset (Liability) Net, Subject To Master Netting Arrangement, Before Offset Derivative Asset (Liability) Net, Subject To Master Netting Arrangement, Before Offset Under-recovered Fuel Costs Over-recovered Fuel Costs Deferred Fuel Costs [Member] Asset acquisition, regulatory liability Asset Acquisition, Regulatory Liability Asset Acquisition, Regulatory Liability Cook Plant Turbine - Indiana Cook Plant Turbine [Member] Cook Plant Turbine [Member] Restricted Retained Earnings Dividend Payment Restrictions Amount of restricted net assets of subsidiaries that may not be distributed to Parent in the form of a loan, advance or dividend. Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Pretax Income Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Notional amount, volume Derivative, Nonmonetary Notional Amount, Volume Entity Shell Company Entity Shell Company Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Regulatory Asset [Line Items] Regulatory Asset [Line Items] Discontinued fair value hedge, cumulative decrease Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Total Investment Total Investment [Member] Total Investment Schedule of the Amount of Income Taxes Paid or (Received) on an Annual basis Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Fuel Mine Closure Costs - Texas Fuel Mine Closure Costs - Texas [Member] Fuel Mine Closure Costs - Texas Total Comprehensive Income Attributable To Noncontrolling Interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Line of Credit Facility [Table] Line of Credit Facility [Table] Asset Retirement Obligations Asset Retirement Obligation [Policy Text Block] Short-term Debt: Short-Term Debt [Abstract] Prior Service Cost Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax Remeasurement of Excess ADIT Effective Income Tax Rate Reconciliation, Remeasurement Of Excess ADIT, Percentage Effective Income Tax Rate Reconciliation, Remeasurement Of Excess ADIT, Percentage Letter of Credit Letter of Credit [Member] Regulated Operation, Regulatory Liability [Table] Regulated Operation, Regulatory Liability [Table] Miscellaneous General Other Receivables Obligations Under Operating Leases Liability Due Within One Year Operating Lease, Liability, Current Recovery of fuel costs Regulatory Asset, Recovery Of Fuel Costs Amount of Dolet Hills Fuel Costs Approved to Recover in 2021. Interest on Lease Liabilities Finance Lease, Interest Expense Document Fiscal Period Focus Document Fiscal Period Focus United States Bonds Defined Benefit Plan, Trust Owned Life Insurance, United States Bond [Member] Defined Benefit Plan, Trust Owned Life Insurance, United States Bond Settlement agreement annual increase Settlement Agreement Annual Increase Settlement Agreement Annual Increase Cleco Power, LLC Cleco Power, LLC [Member] Cleco Power LLC Member Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] ENEC Filing ENEC Filing [Member] ENEC Filing Underfunded Projected Benefit Obligation Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation Award Type [Axis] Award Type [Axis] Monthly billing, payment due term Revenue from Contract with Customer, Monthly Billing, Payment Due Term Revenue from Contract with Customer, Monthly Billing, Payment Due Term Utility Plant [Domain] Utility Plant [Domain] Other Noncurrent Liabilities – Accrued Long-term Benefit Liability Liability, Defined Benefit Plan, Net, Noncurrent Liability, Defined Benefit Plan, Net, Noncurrent Investment, Name [Domain] Investment, Name [Domain] Aggregate intrinsic value of nonvested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Entity Address, City or Town Entity Address, City or Town Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Approved for recovery Regulatory Assets, Final Approval [Member] Regulatory Assets, Final Approval Finance Leases Finance Lease, Weighted Average Discount Rate, Percent Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Other Revenues Other Affiliated and Nonaffiliated [Member] Other Affiliated and Nonaffiliated Virginia Transmission Rate Adjustment Clause Virginia Transmission Rate Adjustment Clause [Member] Virginia Transmission Rate Adjustment Clause Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Eligible Costs [Axis] Eligible Costs [Axis] Eligible Costs Other than temporary impairment Equity Method Investment, Other-than-Temporary Impairment Entity Emerging Growth Company Entity Emerging Growth Company Commercially available insurance Commercially available insurance Commercially available insurance. Finance Leases Finance Lease, Weighted Average Remaining Lease Term Stand alone treatment of nolcs annual revenue increase Stand Alone Treatment of NOLCs Annual Revenue Increase Stand Alone Treatment of NOLCs Annual Revenue Increase SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY Condensed Financial Information of Parent Company Only Disclosure [Text Block] 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] Notes Payable - Nonaffiliated Other Notes Payable Texas Mobile Temporary Emergency Electric Energy Facilities Rider Texas Mobile Temporary Emergency Electric Energy Facilities Rider [Member] Texas Mobile Temporary Emergency Electric Energy Facilities Rider Dividends Paid to AEP Member Dividends Paid Payments of Distributions to Affiliates Spent nuclear fuel obligation, fee charged Spent Nuclear Fuel Obligation, Fee Charged Spent Nuclear Fuel Obligation, Fee Charged Settlement agreement debt capital structure Settlement Agreement Debt Capital Structure Settlement Agreement Debt Capital Structure Assumption Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] Generation PBA and Delayed Retirement Deferral Generation PBA And Delayed Retirement Deferral [Member] Generation PBA And Delayed Retirement Deferral Renewable Resources Rider Renewable Resources Rider [Member] Renewable Resources Rider Schedule of Disaggregated Revenues from Contracts with Customers Disaggregation of Revenue [Table Text Block] Federal Internal Revenue Service (IRS) [Member] Rockport Generating Plant Rockport Generating Plant [Member] Rockport Generating Plant Other Noncurrent Assets - Employee Benefits and Pension Assets Assets for Plan Benefits, Defined Benefit Plan Flat Ridge IV Flat Ridge IV Wind, LLC [Member] Flat Ridge IV Wind, LLC Revised requested net annual increase Public Utilities, Revised Requested Net Annual Increase Public Utilities, Revised Requested Net Annual Increase Nature of Operation, Product Information, Concentration of Risk [Table] Nature of Operation, Product Information, Concentration of Risk [Table] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Transmission Public Utilities, Property, Plant and Equipment, Transmission, Gross Public Utilities, Property, Plant and Equipment, Transmission, Gross Change in Benefit Obligation Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Prepayments and Other Current Assets Prepaid Expense and Other Assets, Current Total Other Temporary Investments and Restricted Cash Other Temporary Investments And Restricted Cash, Fair Value Disclosure Other Temporary Investments And Restricted Cash, Fair Value Disclosure Transfer Credits Income Tax Paid, Transfer Credits, Net Income Tax Paid, Transfer Credits, Net Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Undepreciated Utility Plant Balances of Amos, Mitchell and Mountaineer (as of December 31, 2022) Jurisdictional Plant Balances [Member] Jurisdictional Plant Balances Restricted Cash Restricted Cash And Cash Equivalents, Fair Value Disclosure Restricted Cash And Cash Equivalents, Fair Value Disclosure Pension and OPEB Amortization of Deferred Costs Accumulated Defined Benefit Plans Adjustment, Amortization Of Deferred Costs Attributable To Parent [Member] Accumulated Defined Benefit Plans Adjustment, Amortization Of Deferred Costs Attributable To Parent Designated as Hedging Instrument Designated as Hedging Instrument [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Hedging Relationship [Axis] Hedging Relationship [Axis] Cash Flow Hedges, Net of Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax ARO decommissioning liability Decommissioning Liability, Noncurrent Subsidiary or Equity Method Investee, Sale of Stock [Table] Subsidiary or Equity Method Investee, Sale of Stock [Table] Condensed Cash Flow Statements, Captions [Line Items] Condensed Cash Flow Statements, Captions [Line Items] Noncontrolling Interests Stockholders' Equity, Policy [Policy Text Block] Earning test, over-earning credit to customers, approved Public Utilities, Earning Test, Over-Earning Credit To Customers, Approved Public Utilities, Earning Test, Over-Earning Credit To Customers, Approved Nuclear contingencies, number of units Nuclear Contingencies, Number Of Units Nuclear Contingencies, Number Of Units ACQUISITIONS, DISPOSITIONS AND IMPAIRMENTS Mergers, Acquisitions and Dispositions Disclosures [Text Block] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] 2028 Finance Lease, Liability, to be Paid, Rolling Year Three Non-Taxable or Non-Deductible Items Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent Recommended exclusion of capitalized incentives Public Utilities, Recommended Exclusion Of Capitalized Incentives Public Utilities, Exclusion Of Capitalized Incentives Nonvested, beginning balance (in shares) Nonvested, ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Net Cash Flows from Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Schedule of SWEPCo's Investment In DHLC SWEPCo's Investment In DHLC [Table Text Block] SWEPCo's investment in DHLC. Cost of decommissioning and disposal of radioactive waste Cost of decommissioning and disposal of radioactive waste Cost of decommissioning and disposal of radioactive waste. Regulatory Assets Regulatory Asset, Current [Member] Regulatory Asset, Current Fair value Fair value Debt Securities, Available-for-Sale, Excluding Accrued Interest Subsequent Event Subsequent Event [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Proceeds from Investment Sales Proceeds from Sale of Short-Term Investments Annual Depreciation Depreciation Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Rate Matters (Note 4) Rate Matters Describes all of the specific events that have or may impact rates and amortization of regulatory assets and liabilities (for example, pending or recently concluded regulatory proceedings, environmental requirements). Specifics may include quantifications related to rates, costs and earnings. Events may relate to rate moratoriums or price caps. Mitchell Plant Mitchell Plant [Member] Mitchell Plant Billings from AEP Generating Company Billings from AEP Generating Company [Member] Billings from AEP Generating Company variable interest entity member. Schedule of Estimated Contributions and Payments to the Pension and OPEB Plans Schedule Of Estimated Contributions And Payments To Pension And O P E B Plans [Table Text Block] Tabular disclosure of the expected contributions and payments expected to be paid to the pension plans and/or other employee benefit plans in the next fiscal year. Equity Components [Axis] Equity Components [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Dividends (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Dividends in Period, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Dividends in Period, Weighted Average Grant Date Fair Value 2025 ETT Base Rate Case 2025 ETT Base Rate Case [Member] 2025 ETT Base Rate Case Return of Capital Contributions from Unconsolidated Subsidiaries Return of Capital Contributions from Unconsolidated Subsidiaries Return of Capital Contributions from Unconsolidated Subsidiaries VARIABLE INTEREST ENTITIES AND EQUITY METHOD INVESTMENTS Variable Interest Entity Disclosure [Text Block] Number of sites for which potentially responsible party designation was named Number Of Sites For Which Potentially Responsible Party Designation Was Named Number Of Sites For Which Potentially Responsible Party Designation Was Named Generation & Marketing Generation and Marketing Revenues [Member] Generation and Marketing Revenues. Principal Payments for Finance Lease Obligations Financing Cash Flows Used for Finance Leases Finance Lease, Principal Payments Base Rate Period [Domain] Base Rate Period [Domain] Base Rate Period [Domain] Public utilities, return on recovery, percent Public Utilities, Return On Recovery, Percent Public Utilities, Return On Recovery, Percent Subsequent award period Share-Based Compensation Arrangement by Share-Based Payment Award, Subsequent Award Period Share-Based Compensation Arrangement by Share-Based Payment Award, Subsequent Award Period Demand Side Management Demand Side Management [Member] Demand Side Management Defined contribution plan, cost Defined Contribution Plan, Cost Recognition of Pension Settlement Costs, Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Adjustment for Settlement or Curtailment Gain (Loss), Tax Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Schedule of Asset Retirement Obligations Schedule of Asset Retirement Obligations [Table Text Block] Generation Public Utilities, Property, Plant and Equipment, Generation or Processing [Member] Public Utilities, Property, Plant and Equipment, Generation or Processing Other Operation Utilities Operating Expense, Operations [Member] Utilities Operating Expense, Operations Document Annual Report Document Annual Report Utility Plant in Service Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service Green Country Contract Liability Green Country Contract Liability [Member] Green Country Contract Liability Proceeds from the Midwest Transmission Holdings Noncontrolling Interest Transaction, Net of Transaction Costs Cash proceeds received Proceeds from Noncontrolling Interests Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Retirement of Long-term Debt Retirement of Long-term Debt – Nonaffiliated Debt retired Repayments of Long-Term Debt Return of Capital to Parent Return of Capital to Parent Payments For Return of Capital To Parent Payments For Return of Capital To Parent Plant Retirement Costs - Unrecovered Plant, Texas Plant Retirement Costs - Unrecovered Plant, Texas [Member] Plant Retirement Costs - Unrecovered Plant, Texas SWEPCo Storm Recovery Funding Recovery Funding [Member] Recovery Funding Mutual Funds Mutual Fund [Member] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Direct Sales to West Affiliates Direct Sales to West Affiliates [Member] Direct Sales to West Affiliates. Removal Costs Effective Income Tax Rate Reconciliation, Removal Costs, Amount Effective Income Tax Rate Reconciliation, Removal Costs, Amount Gross Realized Losses on Investment Sales Gross Realized Losses On Investment Sales On Short Term Investment Gross Realized Losses On Investment Sales On Short Term Investment. Property Taxes Property Taxes Property Taxes Property Taxes Long-Term Lending Long-Term Lending [Member] Long-Term Lending Ownership [Domain] Ownership [Domain] Regulatory asset, requested to be financed through securitization Regulatory Asset, Requested To Be Financed Through Securitization Regulatory Asset, Requested To Be Financed Through Securitization Commercial Paper Commercial Paper Operating Lease Liability Deferred Tax Assets (Liabilities), Leasing Arrangements Deferred Tax Assets (Liabilities), Leasing Arrangements Balance at Beginning of Period Balance at End of Period SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Spent Nuclear Fuel and Decommissioning Trusts Spent Nuclear Fuel and Decommissioning Trusts [Member] Spent Nuclear Fuel and Decommissioning Trusts. Barging, Urea Transloading And Other Transportion Services Barging, Urea Transloading And Other Transportion Services [Member] Barging, Urea Transloading And Other Transportion Services 2027 Defined Benefit Plan, Expected Future Benefit Payment, Year Two Upfront Financing Costs Upfront Financing Costs [Member] Upfront Financing Costs TOTAL OTHER NONCURRENT ASSETS Other Noncurrent Assets Other Assets, Noncurrent AEP Generation Resources Inc. AEP Generation Resources Inc. [Member] AEP Generation Resources Inc. Amortization of Certain Securitized Assets Amortization of Certain Securitized Assets The expense charged against earnings during the period to allocate the capitalized costs of securitized assets over the periods expected to benefit from such costs. Other Operation Other Operation Utilities Operating Expense, Operations Other Property, Plant and Equipment (Including Coal Mining and Nuclear Fuel) Other Property, Plant and Equipment General Property, Plant and Equipment, Other, Gross Total Other Revenues Alternative and Other [Member] Alternative and Other [Member] Beginning Balance Ending Balance Asset Retirement Obligation Income Tax (Expense) Benefit Reclassification Into AOCI, Current Period, Tax Reclassification Into AOCI, Current Period, Tax Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Capital Contributions to Unconsolidated Subsidiaries Payments to Acquire Interest in Subsidiaries and Affiliates Regulatory Liability [Line Items] Regulatory Liability [Line Items] Public utilities, recommended disallowance purchased power Public Utilities, Recommended Disallowance Purchased Power Public Utilities, Recommended Disallowance Purchased Power OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Defined Benefit Plan [Table] Defined Benefit Plan [Table] Public utilities, denied, under-recovered costs disallowance Public Utilities, Under-Recovered Costs Disallowance, Denied Public Utilities, Under-Recovered Costs Disallowance, Denied Transition and Restoration Charges Transition and Restoration Charges [Member] Transition and Restoration Charges Customer Deposits Contract with Customer, Liability, Current OVEC Purchased Power OVEC Purchased Power [Member] OVEC Purchased Power Schedule of Fair Value of Derivative Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Maturities of net fair value of risk management contracts Maturity Of Net Fair Value Of Risk Management Contracts Prior To Cash Collateral Assets Or Liabilities Maturity of the net fair value of risk management contracts prior to cash collateral, assets or liabilities. Defined Benefit Plan, Plan Assets, Allocation [Line Items] Defined Benefit Plan, Plan Assets, Allocation [Line Items] Entity Filer Category Entity Filer Category Notional amount, energy measure Derivative, Nonmonetary Notional Amount, Energy Measure Benefit Payments Defined Benefit Plan, Benefit Obligation, Benefits Paid U.S. Federal Statutory Tax Rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Barging, Urea Transloading and Other Transportation Services Barging, Urea Transloading and Other Transportation Services Revenues Affiliated [Member] Barging, Urea Transloading and Other Transportation Services Revenues Affiliated Subsequent Event Type [Axis] Subsequent Event Type [Axis] Maximum percentage debt to capitalization Maximum Percentage Debt to Capitalization Maximum level of debt to capitalization persuant to credit agreement leverage restrictions. Sabine Sabine Mining Co [Member] Sabine Mining Company Variable Interest Entity Member Long-term Debt Long-term Debt – Nonaffiliated Long-Term Debt, Excluding Current Maturities Nonrelated Party Nonrelated Party [Member] 2026 Maturity Period Two [Member] Statement of Financial Position Location, Balance [Axis] Statement of Financial Position Location, Balance [Axis] Jointly owned utility plant, generation capacity Jointly Owned Utility Plant, Generation Capacity Jointly Owned Utility Plant, Generation Capacity Schedule of Depreciation, Depletion and Amortization - Unregulated Depreciation, Depletion and Amortization - Unregulated [Table Text Block] Unregulated depreciation, depletion and amortization. Number of states in which entity operates Number of States in which Entity Operates Entity Address, Address Line One Entity Address, Address Line One Minimum percentage of equity AEP provides Minimum Percentage of Equity AEP Provides The minimum percentage of equity AEP Parent provides to AEP Credit. Schedule of Direct Borrowing Activity Direct Borrowing Activity [Table Text Block] [Table Text Block] for Tabular disclosure of the Direct borrowing participants; activity including: (1) Maximum borrowings from AEP; (2) Maximum Loans to AEP; (3) Average Borrowings from AEP; (4) Average Loans to AEP; (5) Borrowings from AEP as of the balance sheet date; (6) Loans to AEP as of the balance sheet date. Direct Borrowing represents centralized funding mechanism AEP uses to meet the short-term cash requirement of certain subsidiaries. Approved annual revenue increase Approved Annual Revenue Increase Amount of approved annual revenue increase. Accumulated Other Comprehensive Income (Loss) Total AOCI Attributable to Parent [Member] Allowance for Credit Losses Accounts Receivable, Allowance for Credit Loss, Current Special/Contractual Termination Benefits Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits Remaining Recovery Period Regulatory Asset, Amortization Period Ownership [Axis] Ownership [Axis] Total commitment from bank conduits to finance receivables Total Commitment From Bank Conduits To Finance Receivables Total commitment from bank conduits to finance receivables. Schedule of Common Stock Share Activity Schedule of Stock by Class [Table Text Block] Ohio Distribution Investment Rider Ohio Distribution Investment Rider [Member] Ohio Distribution Investment Rider Nonnuclear incident coverage for property damage decommissioning and decontamination Nonnuclear incident coverage for property damage decommissioning and decontamination Insurance coverage for property damage, decommissioning and decontamination for a nonnuclear incident. Expected Volatility Average Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Weighted-Average Dilutive Effect Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Awarded (in shares) Awarded RSUs and Granted Unrestricted Shares (in shares) Awarded, including unrestricted shares (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Effective Interest Rates on Securitization of Accounts Receivable Effective Interest Rates on Securitization of Accounts Receivable Effective interest rate on the amount owed for securitized accounts receivables. Regulatory asset, requested to recovery amount Regulatory Asset, Requested Recovery Amount Regulatory Asset, Requested Recovery Amount Purchases of Investment Securities Purchases of Investments Payments to Acquire Investments Title and Position [Domain] Title and Position [Domain] Cost not yet recognized, amount Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Request to Update SWEPCo Generation Depreciation Rates Request to Update SWEPCo Generation Depreciation Rates [Member] Request to Update SWEPCo Generation Depreciation Rates Schedule of Share-Based Payment Arrangement, Outstanding Award, Activity, Excluding Option Share-Based Payment Arrangement, Outstanding Award, Activity, Excluding Option [Table Text Block] Schedule of Sensitivity of Fair Value Measurements Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Transmission Electric Transmission [Member] Joint License Agreement Joint License Agreement [Member] Joint License Agreement New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Accounting Standards Update and Change in Accounting Principle [Abstract] Requested return on equity Public Utilities, Requested Return on Equity, Percentage Defined Contribution, Employer Matching Contributions [Domain] Defined Contribution, Employer Matching Contributions [Domain] Defined Contribution, Employer Matching Contributions [Domain] Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount 2025 Kentucky Base Rate Case 2025 Kentucky Base Rate Case [Member] 2025 Kentucky Base Rate Case Issuance Expenses Issuance Expenses [Member] Issuance Expenses Schedule of Reconciliation of Changes in Benefit Obligations and Fair Value of Assets Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block] Kentucky Deferred Purchased Power Expenses Kentucky Deferred Purchase Power Expenses [Member] Kentucky Deferred Purchase Power Expenses [Member] Modified Rate Base Cost Modified Rate Base Cost [Member] Modified Rate Base Cost Deferred Charges and Other Noncurrent Assets Deferred Charges and Other Noncurrent Assets Deferred Charges and Other Noncurrent Assets Accelerated Depreciation Regulatory Asset Regulatory Assets, Accelerated Depreciation The amount of accelerated depreciation as a regulatory asset for plants to be retired. 2029 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Four Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Award Type [Domain] Award Type [Domain] Reduction in revenue requirement for recovery of actual test year pjm transmission costs Reduction In Revenue Requirement For Recovery of Actual Test Year PJM Transmission Costs Reduction In Revenue Requirement For Recovery of Actual Test Year PJM Transmission Costs Noncontrolling Interests Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Weighted-Average Remaining Lease Term (years): Weighted-Average Remaining Lease Term [Abstract] Weighted-Average Remaining Lease Term Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Return of Capital Contributions from Unconsolidated Subsidiaries Proceeds from Divestiture of Interest in Subsidiaries and Affiliates Inventory [Domain] Inventory [Domain] Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Requested deferred costs, maximum, year one Public Utilities, Requested Deferred Costs, Maximum, Year One Public Utilities, Requested Deferred Costs, Maximum, Year One 2026 Long-Term Debt, Maturity, Year One Schedule of Impact of Cash Flow Hedges on the Balance Sheet Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Nonutility Nonutility [Member] Nonutility Company. Performance Shares Performance Shares [Member] Top Hat Top Hat Wind Facility [Member] Top Hat Wind Facility Midwest Transmission Holdings Midwest Transmission Holdings [Member] Midwest Transmission Holdings Settlements Defined Benefit Plan, Benefit Obligation, Payment for Settlement Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Minimum Low Minimum [Member] Company Selected Measure Name Company Selected Measure Name Accounts Payable Accounts payable - affiliated companies for collected reclamation costs that have been billed to SWEPCo Accounts Payable, Current Operating Cash Flows Used for Operating Leases Operating Lease, Payments Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Generation Public Utilities, Property, Plant and Equipment, Generation or Processing Stockholders' Equity Note [Abstract] Regulated Operation, Regulatory Asset [Table] Regulated Operation, Regulatory Asset [Table] Distribution Public Utilities, Property, Plant and Equipment, Distribution Trust Assets [Domain] Trust Assets [Domain] [Domain] for Trust Assets [Axis] Schedule of Allocated Assets of Investments Allocated Assets of Investments [Table Text Block] Tabular disclosure of the percentage of investments that are allocated to the Registrant Subsidiaries. After 5 Years Recorded Unconditional Purchase Obligation, to be Paid, after Year Five Capital Contribution from Noncontrolling Interest Proceeds From Contributions From Noncontrolling Interests Proceeds From Contributions From Noncontrolling Interests Interest Rate Short-Term Debt, Weighted Average Interest Rate, at Point in Time Amortization of Pension and OPEB Deferred Costs, Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax Weighted-average remaining contractual life Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Vegetation Management Program - West Virginia Vegetation Management Program - West Virginia [Member] Vegetation Management Program - West Virginia Junior Subordinated Notes Junior Subordinated Notes Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Potential additional ownership percentage Equity Method Investment, Potential Additional Ownership Percentage Equity Method Investment, Potential Additional Ownership Percentage Current Current State and Local Tax Expense (Benefit) Document Transition Report Document Transition Report Schedule of Significant Customers Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Underlying Securities Award Underlying Securities Amount Schedule of Summary of Tax Credit Carryforwards Summary of Tax Credit Carryforwards [Table Text Block] Equity Component [Domain] Equity Component [Domain] 2027 Finance Lease, Liability, to be Paid, Rolling Year Two Approved recovery under recovered costs Approved Recovery Under Recovered Costs Approved Recovery Under Recovered Costs INCOME TAXES Income Tax Disclosure [Text Block] Number of wholly-owned transmissions subsidiaries Number Of Wholly-Owned Transmissions Subsidiaries Number Of Wholly-Owned Transmissions Subsidiaries Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Other Retail Revenues Other Retail [Member] Revenues from retail classes other than residential, commercial and industrial. Percentage of short term borrowing needs in excess of third party financings Percentage Of Short Term Borrowing Needs In Excess Of Third Party Financings Percentage of short-term borrowing needs in excess of third party financings provided by AEP to AEP Credit. Document Type Document Type Flint Creek Generating Station (Unit No. 1) Flint Creek Generating Station (Unit No. 1) [Member] Flint Creek Generating Station (Unit No. 1) Member Level 3 Fair Value, Inputs, Level 3 [Member] Accounts receivable and accrued unbilled revenues Accounts and Financing Receivables, Held-for-Sale Asset Acquisition [Domain] Asset Acquisition [Domain] Total Revenues from Contracts with Customers Revenue from Contract with Customer, Excluding Assessed Tax TOTAL CURRENT ASSETS Current Assets Assets, Current Issuance of Notes Receivable to Unconsolidated Subsidiaries Payments to Acquire Notes Receivable Proceeds from sale of receivables to AEP Credit Proceeds from Sale of Finance Receivables Servicing Contracts Servicing Contracts [Member] Unified Tracker Mechanism Deferred Costs Unified Tracker Mechanism Deferred Costs [Member] Unified Tracker Mechanism Deferred Costs Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] After 1 year through 5 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Energy Efficiency Rate Adjustment Clause - Virginia Energy Efficiency Rate Adjustment Clause - Virginia [Member] Energy Efficiency Rate Adjustment Clause - Virginia EARNINGS ATTRIBUTABLE TO AEP MEMBER, Basic Net Income (Loss) Available to Common Stockholders, Basic Net Income (Loss) Available to Common Stockholders, Basic Regulatory Asset for Under-Recovered Fuel Costs Total Current Regulatory Assets Regulatory Asset, Current Entity Information [Line Items] Entity Information [Line Items] CURRENT LIABILITIES Liabilities, Current [Abstract] Schedule of Gain (Loss) on Hedging Instruments Derivative Instruments, Gain (Loss) [Table Text Block] Mitchell Plant ELG investments Mitchell Plant ELG investments [Member] Mitchell Plant ELG investments Equity Earnings of Unconsolidated Subsidiaries Income (Loss) from Equity Method Investments, Parent Income (Loss) from Equity Method Investments, Parent Repayment of Notes Receivable from Affiliated Companies Repayment of Notes Receivable from Related Parties Life insurance administrative load Defined Benefit Plan, Life Insurance Administrative Load Defined Benefit Plan, Life Insurance Administrative Load Related Party Transaction [Table] Related Party Transaction [Table] 2024 West Virginia Base Rate Case 2024 West Virginia Base Rate Case [Member] 2024 West Virginia Base Rate Case Schedule of Maximum Potential Loss Max Potential Loss on Master Lease Agreements [Table Text Block] Max potential loss on master lease agreements. Total Accounts Receivable Accounts Receivable, after Allowance for Credit Loss, Current Defined Benefit Plan, Plan Assets, Allocation [Table] Defined Benefit Plan, Plan Assets, Allocation [Table] Schedule of Actuarial Assumptions Defined Benefit Plan, Assumptions [Table Text Block] Sale of stock, number of shares issued in transaction (in shares) Sale of Stock, Number of Shares Issued in Transaction Regulatory Assets or Liability, Return Status [Axis] Regulatory Assets or Liability, Return Status [Axis] Regulatory Assets or Liability, Return Status Consolidation Items [Domain] Consolidation Items [Domain] 2027 - 2029 Maturity Period Four [Member] Auditor Location Auditor Location Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Flat Ridge V Flat Ridge V Wind, LLC [Member] Flat Ridge V Wind, LLC Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Public Utilities General Disclosures [Table] Public Utilities General Disclosures [Table] Flow-Through of CAMT Effective Income Tax Rate Reconciliation Flow-Through Of CAMT, Percent Effective Income Tax Rate Reconciliation Flow-Through Of CAMT, Percent Participant Contributions Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant Realized gain (loss) included in net income (or changes in net assets) Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings Total Cash Paid/(Received) Income Taxes Paid, Net Principal Amount Long-Term Debt, Gross Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Interest Rate on Long-term Debt (USD) Interest Rate On Long-Term Debt [Member] Interest Rate Member. Formula rate period Revenue from Contract with Customer, Formula Rate Period Revenue from Contract with Customer, Formula Rate Period Change for the Year Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Total Gain (Loss) on Risk Management Contracts Gain (Loss) on Derivative Instruments, Net, Pretax WPCo WPCo Portion [Member] WPCo Portion Requested debt capital structure Public Utilities, Requested Debt Capital Structure, Percentage Fixed Income Fixed Income Securities [Member] Utility Utility [Member] Utility Company. Coal Coal [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Inventory Inventory, Policy [Policy Text Block] Entity Current Reporting Status Entity Current Reporting Status Derivative [Line Items] Derivative [Line Items] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Consolidated Entities [Domain] Consolidated Entities [Domain] Risk Management Liabilities Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement Ohio Enhanced Service Reliability Plan Ohio Enhanced Service Reliability Plan [Member] Ohio Enhanced Service Reliability Plan Contingently Redeemable Performance Share Awards Redeemable Noncontrolling Interest, Equity, Performance Shares, Carrying Amount The fair value as of the balance sheet date of contingently redeemable performance share awards. Financial Instrument [Axis] Financial Instrument [Axis] Requested recovery of eligible costs Regulatory Asset, Requested Recovery Of Eligible Costs Regulatory Asset, Requested Recovery Of Eligible Costs Settlement amount recoverable for dry cask current Settlement Amount Recoverable For Dry Cask Current Amount expected to be recovered from a governmental agency within one year for settlement of spent fuel disposal litigation. SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] Withdrawal liability Multiemployer Plans, Withdrawal Obligation Liability Due Within One Year Finance Lease, Liability, Current Accumulated Benefit Obligation Defined Benefit Plan, Accumulated Benefit Obligation Current Fiscal Year End Date Current Fiscal Year End Date Initial Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year Debt-to-total capitalization maximum Debt-to-Total Capitalization Maximum Transource Energy's credit facility agreement debt-to-total capitalization percentage maximum. Fuel disallowance Regulatory Asset, Fuel Disallowance Regulatory Asset, Fuel Disallowance Energy and Capacity Purchase Contracts Energy and Capacity Purchase Contracts [Member] Energy and Capacity Purchase Contracts. 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 [Abstract] Other Property, Plant and Equipment Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment [Member] Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment Total Risk Management Liabilities Fair value, liabilities Derivative Liability 2030 Finance Lease, Liability, to be Paid, Rolling Year Five Amortization of Prior Service Credit Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax Cash Dividends Received from Unconsolidated Subsidiaries Proceeds from Equity Method Investment, Distribution Condensed Balance Sheet Statements, Captions [Line Items] Condensed Balance Sheet Statements, Captions [Line Items] Other Investments Defined Benefit Plan, Other Investments [Member] Defined Benefit Plan, Other Investments Paid-in Capital Members' Capital Securitized offset for net present value of return on ADIT Offset For Net Present Value Of Return On ADIT Offset For Net Present Value Of Return On ADIT Allowance for Funds Used During Construction and Interest Capitalization Allowance for Funds Used During Construction, Policy [Policy Text Block] Northeastern Plant, Unit 3 Northeastern Plant, Unit 3 [Member] Northeastern Plant, Unit 3 Maximum Interest Rate Maximum Interest Rate The maximum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, either borrowed from or loaned to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries. Accounts Payable: Accounts Payable [Abstract] Unrealized Loss on Forward Commitments Unrealized Loss on Forward Commitments [Member] Unrealized Loss on Forward Commitments Net Cash Flows from Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Cook Plant PTC Deferral - Michigan Cook Plant PTC Deferral - Michigan [Member] Cook Plant PTC Deferral - Michigan Schedule of Components of Change in Amounts Included in AOCI and Regulatory Assets Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] OPEB Medicare Subsidy Receipts Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt [Abstract] Employee Benefits and Pension Obligations Employee Benefits and Pension Obligations, Noncurrent Element represents the noncurrent liability recognized on the balance sheet that is associated with employee benefit and pension obligations including, but not limited to, defined benefit pension plans, other postretirement defined benefit plans, deferred incentive compensation and other postemployment benefits. Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Amortization of Actuarial (Gains) Losses Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] Statement of Financial Position Location, Activity, Accrual [Domain] Statement of Financial Position Location, Activity, Accrual [Domain] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Risk Free Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Entity Tax Identification Number Entity Tax Identification Number Other Regulatory Liabilities Pending Final Regulatory Determination Other Regulatory Liabilities Pending Final Regulatory Determination [Member] Other Regulatory Liabilities Pending Final Regulatory Determination Related party transaction, agreement, expiration, auto-renew period Related Party Transaction, Agreement, Expiration, Auto-Renew Period Related Party Transaction, Agreement, Expiration, Auto-Renew Period Asset Acquisition [Axis] Asset Acquisition [Axis] KPCo Kentucky Power Co [Member] Kentucky Power Company Member Change in Other Regulatory Assets Increase (Decrease) in Other Regulatory Assets Amortization of Regulatory Assets and Liabilities Amortization of Regulatory Assets and Liabilities The expense/income charged against earnings during the period to allocate the capitalized costs of regulatory assets/liabilities over the periods expected to benefit from such costs. Other Long-term Debt Other Long Term Debt [Member] Other long term debt member Sale of stock, consideration to be received on transaction Sale Of Stock, Consideration To Be Received On Transaction Sale Of Stock, Consideration To Be Received On Transaction Under-Recovered Purchased Power Rider Costs Under-Recovered Purchased Power Rider Costs [Member] Under-Recovered Purchased Power Rider Costs 2029 Long-Term Debt, Maturity, Year Four AEP's Ratio of OVEC Debt AEP's Ratio of OVEC Debt [Member] AEP's ratio of OVEC debt. Billings from AEP Service Corporation Billings from AEP Service Corporation [Member] Billings from AEP Service Corporation variable interest entity member. Entity Public Float Entity Public Float Trading Arrangement: Trading Arrangement [Axis] FERC 2021 PJM and SPP Transmission Formula Rate Challenge FERC 2021 PJM and SPP Transmission Formula Rate Challenge [Member] FERC 2021 PJM and SPP Transmission Formula Rate Challenge Risk Management Assets Current Risk Management Assets Derivative Asset, Current Pirkey Plant Accelerated Depreciation Pirkey Power Plant Accelerated Depreciation [Member] Pirkey Power Plant Accelerated Depreciation Net Actuarial Gain Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax Corporate and Other Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Requested recovery, under-recovered costs, period Requested Recovery Under-Recovered Costs, Period Requested Recovery Under-Recovered Costs, Period Four Electric Generation Facilities Four Electric Generation Facilities [Member] Four Electric Generation Facilities Unamortized Loss on Reacquired Debt Unamortized Loss On Reacquired Debt [Member] Unamortized Loss On Reacquired Debt TOTAL NONCURRENT LIABILITIES Noncurrent Liabilities Liabilities, Noncurrent Regulated and Unregulated Operation [Domain] Regulated and Unregulated Operation [Domain] Non-Taxable or Non-Deductible Items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount Over-recovered Fuel Costs - Ohio Over-recovered Fuel Costs - Ohio [Member] Over-recovered Fuel Costs - Ohio Increase in PJM transmission costs Public Utilities, Requested Rate Increase (Decrease) In PJM Transmission Costs Public Utilities, Requested Rate Increase (Decrease) In PJM Transmission Costs Maintenance Maintenance Cost, Policy [Policy Text Block] Pledged Accounts Receivable – AEP Credit Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount EXPENSES Operating Expenses [Abstract] Discount Rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Asset Acquisition, Contingent Consideration [Table] Asset Acquisition, Contingent Consideration [Table] Held in Treasury Increase (Decrease) in Temporary Equity [Roll Forward] Number of eligible employees Number of Eligible Employees The total number of employees who are eligible to participate in the Voluntary Severance Program. Long-term Under-recovered Fuel Costs - West Virginia Long-term Under-Recovered Fuel Costs - West Virginia [Member] Long-term Under-Recovered Fuel Costs - West Virginia (Provision For) Reversal Of Refund (Provision For) Reversal Of Refund [Member] (Provision For) Reversal Of Refund Redemption of Short-term Debt with Original Maturities greater than 90 Days Repayments of Short-Term Debt, Maturing in More than Three Months Cash paid for amounts included in the measurement of lease liabilities: Cash Paid For Amounts Included In The Measurement Of Lease Liabilities [Abstract] Cash Paid For Amounts Included In The Measurement Of Lease Liabilities Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Disallowance Cost Effective Income Tax Rate Reconciliation, Disallowance Cost, Percent Effective Income Tax Rate Reconciliation, Disallowance Cost, Percent Settlement revenue requirement rate decrease year two Public Utilities, Requested Settlement Of Revenue Year Two Increase (Decrease), Amount Public Utilities, Requested Settlement Of Revenue Year Two Increase (Decrease), Amount Weighted-Average Number of Diluted AEP Common Shares Outstanding Weighted Average Number of Shares Outstanding, Diluted, Adjustment 2-3 Years Recorded Unconditional Purchase Obligation Due Within Two To Three Year Amount of the recorded unconditional purchase obligation maturing in the next two to three years following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Schedule of Notional Volume of Derivative Instruments Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Charitable Contributions Charitable Contributions [Member] Charitable Contributions Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Weighted Average Interest Rate Weighted Average Interest Rate Long-Term Debt, Weighted Average Interest Rate, at Point in Time Other Noncurrent Assets Other Noncurrent Assets [Member] FERC Matter [Axis] FERC Matter [Axis] FERC Matter Amos and Mountaineer Plants Amos and Mountaineer Plants [Member] Amos and Mountaineer Plants Leases [Abstract] Leases [Abstract] Area of land closed, noncompliant with CCR rule Area Of Land Closed, Noncompliant With CCR Rule Area Of Land Closed, Noncompliant With CCR Rule Accounts Payable Increase (Decrease) in Accounts Payable Generating Units Probable of Abandonment Generating Units Probable of Abandonment [Member] Generating Units Probable of Abandonment [Member] Employee Benefits and Pension Assets Employee Benefits and Pension Assets, Noncurrent Element represents the noncurrent asset recognized on the balance sheet that is associated with employee benefit and pension assets including, but not limited to, defined benefit pension plans, other postretirement defined benefit plans, deferred incentive compensation and other postemployment benefits. Transfers into Level 3 Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 Gross unrealized losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Employer contribution cost Multiemployer Plan, Employer Contribution, Cost Share-based Payment Arrangement, Noncash Expense [Abstract] Share-Based Payment Arrangement, Noncash Expense [Abstract] 2026 - 2028 Maturity Period Three [Member] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] TOTAL BASIC EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS (in USD per share) Weighted-Average Number of Basic AEP Common Shares Outstanding (in USD per share) Earnings Per Share, Basic Notes Receivable - Affiliated Receivables, Fair Value Disclosure Proceeds from contributed capital Proceeds from Contributed Capital Common stock, capital shares reserved for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Monthly billing term Revenue from Contract with Customer, Monthly Billing Term Revenue from Contract with Customer, Monthly Billing Term Fair Value of Plan Assets Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets Changes in Unrecognized Tax Benefits Effective Income Tax Rate Reconciliation, Tax Contingency, Percent Discount Rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Accrued Unbilled Revenues Unbilled Receivables, Current Fixed performance obligations Revenue, Remaining Performance Obligation, Amount Revision of estimate Revisions in Cash Flow Estimates Asset Retirement Obligation, Revision of Estimate APCo Appalachian Consumer Rate Relief Funding Appalachian Consumer Rate Relief Funding [Member] Appalachian Consumer Rate Relief Funding [Member] Proceeds from Sales of Assets Proceeds from Sale of Productive Assets Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Proceeds from Investment Sales Proceeds from Sale of Other Investments Payments to acquire equity method investments Investment in Equity Method Investments Payments to Acquire Equity Method Investments OHIO POWER COMPANY OPCo Ohio Power Company [Member] Ohio Power Company Member Fixed Income Securities: Fixed Income Securities, Fair Value Disclosure Fixed Income Securities, Fair Value Disclosure Request to defer transmission costs, amount denied Public Utilities, Request To Defer Transmission Costs, Amount Denied Public Utilities, Request To Defer Transmission Costs, Amount Denied CURRENT ASSETS Assets, Current [Abstract] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] AEP Texas Restoration Funding Restoration Funding [Member] Texas Restoration Funding for Hurricane Harvey Total Assets Offsetting Derivative Assets [Abstract] Deferred Investment Tax Credits Deferred Investment Tax Credits [Member] Deferred Investment Tax Credits Member. Power acquired, solid oxide fuel cells Power Acquired, Solid Oxide Fuel Cells Power Acquired, Solid Oxide Fuel Cells Carrying Amount in AEP Generating Company's Accounts Payable Carrying Amount in AEP Generating Company's Accounts Payable [Member] Carrying amount in AEP Generating Company's accounts payable member. Schedule of Operating Lease Liabilities Rolling Future Minimum Lease Payments Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Other Regulatory Assets Pending Final Regulatory Approval Other Regulatory Assets Pending Final Regulatory Approval [Member] Other Regulatory Assets Pending Final Regulatory Approval Proportionate energy and capacity share Jointly Owned Utility Plant, Proportionate Energy And Capacity Share Jointly Owned Utility Plant, Proportionate Energy And Capacity Share AEP TEXAS INC. AEP Texas AEP Texas Inc. [Member] AEP Texas Inc. Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Outstanding indebtedness Outstanding Indebtedness Outstanding Indebtedness Total Obligations Under Operating Leases Estimated Present Value of Future Minimum Lease Payments Operating Lease, Liability United States Government US Government Agencies Debt Securities [Member] Recommended exclusion of investments from rate base Public Utilities, Recommended Exclusion Of Investments From Rate Base Public Utilities, Recommended Exclusion Of Investments From Rate Base After 2030 Lessee, Operating Lease, Liability, to be Paid, after Rolling Year Five Deferred Credits and Other Noncurrent Liabilities Deferred credits and other noncurrent liabilities Other Liabilities, Noncurrent Auditor [Line Item] Auditor [Line Items] Statement of Cash Flows Statement of Cash Flows [Abstract] Long-term Debt Due Within One Year Long-term Debt Due Within One Year – Nonaffiliated Long-term Debt Due Within One Year Long-Term Debt, Current Maturities Company Selected Measure Amount Company Selected Measure Amount Generation Electricity, Generation [Member] Measurement Input Type [Axis] Measurement Input Type [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] Amount of approved increase related to storm catastrophe reserve Amount of Approved Increase Related to Storm Catastrophe Reserve Amount of Approved Increase Related to Storm Catastrophe Reserve Maturity of Fair Value Risk Management Contracts [Axis] Maturity Of Fair Value Risk Management Contracts Abstract [Axis] Treasury Stock Reacquired (in shares) Partners' Capital Account, Units, Treasury Units Purchased Reversal of Origination Flow-Through Effective Income Tax Rate Reconciliation, Reversal Of Origination Flow-Through, Amount Effective Income Tax Rate Reconciliation, Reversal Of Origination Flow-Through, Amount Retirement Plan Tax Status [Domain] Retirement Plan Tax Status [Domain] Interest Crediting Rate Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Interest Crediting Rate Interest Crediting Rate used to determine net periodic benefit cost of defined benefit plan. Regulatory liabilities, not subject to rate normalization requirements, amount Regulatory Liability, Not Subject to Rate Normalization Requirements. Amount Regulatory Liability, Not Subject to Rate Normalization Requirements. Amount 2027 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Two Accrued Taxes, Net Increase (Decrease) in Accrued Taxes Payable Requested retail rate increase (decrease), amount Public Utilities, Requested Retail Rate Increase (Decrease), Amount Public Utilities, Requested Retail Rate Increase (Decrease), Amount Risk management liabilities, offset Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset 4-5 Years Recorded Unconditional Purchase Obligation Due Within Four To Five Year Amount of the recorded unconditional purchase obligation maturing in the next four to five years following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Legal Entity [Axis] Legal Entity [Axis] Transmission and Distribution Utilities Transmission and Distribution Utilities Revenues [Member] Transmission and Distribution Revenues. Aep share of independence energy connection capital costs AEP Share of Independence Energy Connection Capital Costs AEP Share of Independence Energy Connection Capital Costs Other Portion at Other than Fair Value Measurement [Member] Vested (in dollars per share) Vested, including unrestricted shares (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Regulatory Liability [Axis] Regulatory Liability [Axis] CCR Rule Revision CCR Rule Revision [Member] CCR Rule Revision Sale of stock, authorized amount (in shares) Sale Of Stock, Authorized Amount, Shares Sale Of Stock, Authorized Amount, Shares Asset Retirement Obligation Costs Asset Retirement Obligation Costs [Member] Pirkey Power Plant and Related Fuel Operations Pirkey Power Plant and Related Fuel Operations [Member] Pirkey Power Plant and Related Fuel Operations Concentration Risk Type [Axis] Concentration Risk Type [Axis] Return of Capital to Parent Return of Capital to AEP Member Adjustments To Additional Paid In Capital, Return of Capital To Parent Adjustments To Additional Paid In Capital, Return of Capital To Parent Excess Nuclear Decommissioning Funding Excess Asset Retirement Obligations For Nuclear Decommissioning Liability [Member] Excess Asset Retirement Obligations For Nuclear Decommissioning Liability Member. Assets: Assets, Fair Value Disclosure [Abstract] Cash dividends declared (in USD per share) Common Stock, Dividends, Per Share, Declared Future payments Registration Payment Arrangement, Maximum Potential Consideration Other Short-term Debt Short-Term Bank Loans and Notes Payable Level 2 Fair Value, Inputs, Level 2 [Member] State and Local Income Taxes, Net Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Other Operation Utilities Operating Expense (Credit To Expense), Operations Utilities Operating Expense (Credit To Expense), Operations Schedule of Regulatory Assets Schedule of Regulatory Assets [Table Text Block] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Change in Fair Value of Plan Assets Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Sales of Investment Securities Proceeds from Sale, Maturity and Collection of Investments Interest Income Interest income Interest Income - Affiliated Investment Income, Interest INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Changes in Certain Components of Working Capital: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Income Statement Income Statement [Abstract] Sale of Stock [Domain] Sale of Stock [Domain] Accrued Taxes Taxes Payable, Current Long-term Risk Management Liabilities Derivative Liability, Noncurrent Accrued Interest Increase (Decrease) in Interest Payable, Net Noncash Increase in Noncurrent Assets from the Sale of the Competitive Contracted Renewables Portfolio Noncash or Part Noncash Divestiture, Amount of Consideration Received Product and Service [Domain] Product and Service [Domain] Capitalized Portion Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Capitalized Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Capitalized 2023 Michigan Power Supply Cost Recovery 2023 Michigan Power Supply Cost Recovery [Member] 2023 Michigan Power Supply Cost Recovery Customer Concentration Risk Customer Concentration Risk [Member] Amount of power purchased from OVEC Amount Of Power Purchased From O V E C Amount of power purchased by the Registrant Subsidiaries from OVEC. Non-Registrants Non Registrant [Member] Non Registrant Parent Parent [Member] ARO liabilities Liabilities Incurred Asset Retirement Obligation, Liabilities Incurred Notional amount Derivative, Notional Amount Non-Taxable or Non-Deductible Items Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount 2026 Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt, Year One Pending final regulatory determination Regulatory Liability, Pending Final Determination Including Netting [Member] Regulatory Liability, Pending Final Determination Including Netting Change in Regulatory Assets Increase (Decrease) in Regulatory Assets The increase (decrease) during the reporting period in regulatory assets. Reduction of under-recovered costs disallowance Increase (Decrease) In Under-Recovered Costs Disallowance Increase (Decrease) In Under-Recovered Costs Disallowance Other Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life Welsh Plant, Units 1 and 3 Accelerated Depreciation Welsh Plant, Units 1 and 3 Accelerated Depreciation [Member] Welsh Plant, Units 1 and 3 Accelerated Depreciation Accumulated Amortization Public Utilities, Property, Plant and Equipment, Accumulated Depreciation [Member] Public Utilities, Property, Plant and Equipment, Accumulated Depreciation Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Transmission Revenues Transmission Revenues Affiliated [Member] Transmission Revenues Affiliated Employer matching contribution, percent of match Defined Contribution Plan, Employer Matching Contribution, Percent of Match Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Types of Related Party Revenue [Domain] Types of Related Party Revenue [Domain] Types of Related Party Revenue [Domain] Decommissioning and Low Level Waste Accumulation Disposal Decommissioning and Low Level Waste Accumulation Disposal [Member] Decommissioning and Low Level Waste Accumulation Disposal [Member] Federal: Federal Income Tax Expense (Benefit), Continuing Operations [Abstract] VIU Vertically Integrated Utilities Segment [Member] Vertically Integrated Utilities [Member] Amortization of Net Actuarial Loss Defined Benefit Plan, Amortization of Gain (Loss) Deferred Fuel Over/Under-Recovery, Net Deferred Fuel Over(Under) Recovery, Net The net change during the reporting period in the value of the asset (liability) created by an (over) under recovery of fuel costs. An over recovery represents the excess of fuel revenues billed to customers over fuel costs incurred and an under recovery represents excess fuel costs incurred over fuel revenues billed to customers. Total Lease Rental Costs Lease, Cost Effective Income Tax Rate Reconciliation [Line Items] Effective Income Tax Rate Reconciliation [Line Items] Maximum percentage of consolidated tangible net assets Maximum Percentage of Consolidated Tangible Net Assets Maximum percentage of consolidated tangible net assets limit for debt as stated in the covenants in AEPTCO's note purchase agreements and indenture. Purchased Electricity, Fuel and Other Consumables Used for Electric Generation Cost of Sales [Member] Other Liabilities Other Liabilities Bad Debt Rider Bad Debt Rider [Member] Bad Debt Rider Goodwill Goodwill Schedule of Lease Rental Costs and Supplemental Lease Information Lease, Cost [Table Text Block] Gross Realized Losses on Investment Sales Gain (Loss) on Investments Prepaid Expenses and Other Current Assets Prepaid Expenses and Other Current Assets [Member] Plant Retirement Costs - Unrecovered Plant Plant Retirement Costs - Unrecovered Plant [Member] Plant Retirement Costs - Unrecovered Plant [Member] Deferred Deferred Federal Income Tax Expense (Benefit) Auditor Name Auditor Name Concentration Risk [Table] Concentration Risk [Table] Total Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value Other Regulatory Assets Approved for Recovery Other Regulatory Assets Approved for Recovery [Member] Other Regulatory Assets Approved for Recovery CWIP Public Utilities, Property, Plant and Equipment, Construction Work in Progress Amortization of Pension and OPEB Deferred Costs, Net of Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Schedule of State Income Tax Net Operating Loss Deferred Tax Assets Summary of Operating Loss Carryforwards [Table Text Block] Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Liabilities Hedged Liability, Active And Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Hedged Liability, Active And Discontinued Fair Value Hedge, Cumulative Increase (Decrease) United States Government and Agency Securities US Treasury and Government [Member] Requested recovery amount, restricted period Public Utilities, Requested Recovery Amount, Restricted Period Public Utilities, Requested Recovery Amount, Restricted Period Spent Nuclear Fuel Obligation Spent Nuclear Fuel Obligation [Member] Spent Nuclear Fuel Obligation Pension and OPEB Plans Pension and Other Postretirement Plans, Policy [Policy Text Block] Dividends Paid to AEP Member Dividends Dividends Amount Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Pension and OPEB Changes in Funded Status Accumulated Defined Benefit Plans Adjustment, Net Transition Attributable to Parent [Member] Requested annual revenue increase (decrease), amount Public Utilities, Requested Annual Revenue Requirement Increase (Decrease), Amount Public Utilities, Requested Annual Revenue Requirement Increase (Decrease), Amount Investment gains or losses period Defined Contribution Plan, Investment Gains Or Losses Period Defined Contribution Plan, Investment Gains Or Losses Period Derivative Instrument [Axis] Derivative Instrument [Axis] Adjusted cost of debt securities Adjusted cost of debt securities Adjusted cost of debt securities. Pension and OPEB Funded Status Pension and OPEB Funded Status [Member] Pension and OPEB Funded Status Benefit Payments Defined Benefit Plan, Plan Assets, Benefits Paid Gigawatt AI Warrant Gigawatt AI Warrant [Member] Gigawatt AI Warrant Gigawatt.AI Gigawatt.AI [Member] Gigawatt.AI LEASES Lessee, Finance Leases [Text Block] Schedule of Accumulated Benefit Obligation Schedule of Accumulated and Projected Benefit Obligations [Table Text Block] Direct Borrowing Direct Borrowing [Member] Direct Borrowing and Loans from and to Parent Entity [Domain] Entity [Domain] Settlements Defined Benefit Plan, Plan Assets, Payment for Settlement Net Cash Flows Used for Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Revenue, remaining performance obligation, expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Loss on the Sale of the Competitive Contracted Renewables Portfolio Pretax loss Gain (Loss) on Disposition of Business 2025 Maturity Period One [Member] 2021 [Member] Document Fiscal Year Focus Document Fiscal Year Focus Regulatory Assets Regulatory Asset, Noncurrent [Member] Regulatory Assets. SOUTHWESTERN ELECTRIC POWER COMPANY SWEPCo Southwestern Electric Power Company [Member] Southwestern Electric Power Company Member Operating lease Asset Acquisition, Operating Lease Asset Acquisition, Operating Lease 2028 Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt, Year Three Gross Realized Gains on Investment Sales Gross Realized Gains on Investment Sales On Short Term Investment Gross Realized Gains on Investment Sales On Short Term Investment. Capital Contribution from AEP Member Proceeds From Contributions From Members Proceeds From Contributions From Members Protected Cell of EIS Protected Cell Of Energy Insurance Services, Inc. [Member] Protected Cell Of Energy Insurance Services, Inc. Variable Interest Entity Member Cost not yet recognized, period for recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition International Defined Benefit Plan, Equity Securities, Non-US [Member] Performance Shares Mandatorily Deferred as AEP Career Shares (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Shares Mandatorily Deferred Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Shares Mandatorily Deferred Mitchell Base Rate Surcharge Mitchell Base Rate Surcharge [Member] Mitchell Base Rate Surcharge Derivatives and Hedging Derivatives, Policy [Policy Text Block] BUSINESS SEGMENTS Segment Reporting Disclosure [Text Block] Securities loaned, collateralized percentage Defined Benefit Plan, Securities Loaned, Collateralized Percentage Defined Benefit Plan, Securities Loaned, Collateralized Percentage 2024 Oklahoma Base Rate Case 2024 Oklahoma Base Rate Case [Member] 2024 Oklahoma Base Rate Case Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Schedule of Benefit Amounts Recognized on the Balance Sheets Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Fair Value of Plan Assets as of January 1, Fair Value of Plan Assets as of December 31, Fair Value of Plan Assets Defined Benefit Plan, Plan Assets, Amount Other Commitments [Line Items] Other Commitments [Line Items] Approved annual base rate increase Public Utilities, Approved Rate Increase (Decrease), Amount Wind generation MW Wind Generation MWs Wind Generation (MWs) Schedule of Components of Net Periodic Benefit Cost Schedule of Net Benefit Costs [Table Text Block] Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Leases Lessee, Leases [Policy Text Block] Excess SO2 Allowance Inventory Excess SO2 Allowance Inventory - Indiana Excess SO2 Allowance Inventory - Virginia [Member] Excess SO2 Allowance Inventory - Virginia Impairment charge total Impairment Charge Total Total impairment charge recorded as part of agreement. Acquisitions of Generation Facilities Acquisitions of Assets Payments to Acquire Productive Assets Power participation ratio Power Participation Ratio Power participation ratio Depreciation and Amortization of Property, Plant and Equipment Depreciation, Depletion and Amortization Settlements Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Weighted-Average Dilutive Effect (in USD per share) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements, Per Share Includes adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. Sale of stock, consideration received on transaction Sale of Stock, Consideration Received on Transaction Vendor Purchases Vendor Purchases [Member] Vendor Purchases Revolving Credit Facility Revolving Credit Facility [Member] Requested net annual increase Public Utilities, Requested Net Annual Increase The amount requested for net annual increase. Total Obligations Under Finance Leases Estimated Present Value of Future Minimum Lease Payments Finance Lease, Liability Segments [Axis] Segments [Axis] Change in Presentation Comparability of Prior Year Financial Data, Policy [Policy Text Block] Amortization of KPCo Basis Difference Amortization Of Basis Difference Amortization Of Basis Difference Long-term Risk Management Liabilities Derivative Liability, Noncurrent, Net Derivative Liability, Noncurrent, Net Regulatory Assets Currently Not Earning Return Regulatory Assets Currently Not Earning Return [Member] Regulatory Assets Currently Not Earning a Return Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Renewable Generation Revenues Renewable Generation [Member] Renewable Generation Customers Accounts Receivable, before Allowance for Credit Loss, Current Schedule of Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits Schedule Of Utility Money Pool Participants Money Pool Activity And Authorized Borrowing Limits [Table Text Block] Tabular disclosure of a Utility Money Pool participants' money pool activity and authorized borrowing limits including: (1) Maximum Borrowings from Utility Money Pool; (2) Maximum Loans to Utility Money Pool; (3) Average Borrowings from Utility Money Pool; (4) Average Loans to Utility Money Pool; (5) Net Loans (Borrowings) to/from Utility Money Pool as of the balance sheet date; (6) Authorized Short-term Borrowing Limit. The Utility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain utility subsidiaries. Other Investing Activities Payment for (Proceeds from) Other Investing Activity After 2030 After 2030 Long-Term Debt, Maturity, after Year Five Fair value of derivative liability subject to cross-acceleration Fair Value Of Derivative Liabilities Subject To Cross Acceleration Provisions Fair Value Of Derivative Liabilities Subject To Cross Acceleration Provisions Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Debt Instrument [Axis] Debt Instrument [Axis] FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] BENEFIT PLANS Retirement Benefits [Text Block] Schedule of Supplementary Cash Flow Information Supplementary Cash Flow Information [Table Text Block] Supplementary Cash Flow Information Credit Facility [Domain] Credit Facility [Domain] EQUITY COMMON SHAREHOLDER’S EQUITY Equity, Attributable to Parent [Abstract] 2028 Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt, Year Four Investment, Name [Axis] Investment, Name [Axis] Entity Voluntary Filers Entity Voluntary Filers COMMITMENTS, GUARANTEES AND CONTINGENCIES Commitments Contingencies and Guarantees [Text Block] Total Assets Gross Amounts Recognized Derivative Asset, Subject to Master Netting Arrangement, before Offset Notes receivable – affiliated Accounts Receivable, after Allowance for Credit Loss Entity Registrant Name Entity Registrant Name Portion Expected to be Reclassed to Net Income During the Next Twelve Months Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months Change in Other Noncurrent Assets Increase (Decrease) in Other Noncurrent Assets Net Periodic Benefit Cost (Credit) Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Retail, Trading and Marketing Revenues Marketing, Competitive Retail and Renewable [Member] Marketing, Competitive Retail and Renewable [Member] PJM/SPP Annual Formula Rate True-up PJM/SPP Annual Formula Rate True Up [Member] PJM/SPP Annual Formula Rate True Up [Member] Regulated Operations [Abstract] Regulated Operations [Abstract] Spent nuclear fuel storage costs recovery Spent Nuclear Fuel Storage Costs Recovery Recovery of certain spent nuclear fuel dry cask storage costs incurred as a result of the government's delays in accepting SNF for permanent storage. Number of operating segments Number of Operating Segments Operating Leases Leases, Operating [Abstract] Weighted-Average Grant Date Fair Value (in dollars per share) Awarded (in dollars per share) Awarded, including unrestricted shares (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Interest Cost Defined Benefit Plan, Interest Cost Related Party [Axis] Related and Nonrelated Parties [Axis] Restatement Determination Date: Restatement Determination Date [Axis] Capital lease term Capital Lease Terms Maximum Capital Lease Terms Maximum Schedule of Voluntary Severance Program Expenses Restructuring and Related Costs [Table Text Block] Capital Contribution from Noncontrolling Interest Noncontrolling Interest, Increase from Subsidiary Equity Issuance Other Financing Activities Proceeds from (Payment for) Other Financing Activity Reclassifications from AOCI, Net of Income Tax (Expense) Benefit Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Regulatory Asset [Axis] Regulatory Asset [Axis] Name Trading Arrangement, Individual Name Arkansas ARKANSAS Debt instrument, face amount Debt Instrument, Face Amount Reclassifications of KPCo Pension and OPEB Regulatory Assets, Tax Other Comprehensive (Income) Loss, Defined Benefit Plan Including Regulatory Assets, Reclassification Adjustment from AOCI, Tax Other Comprehensive (Income) Loss, Defined Benefit Plan Including Regulatory Assets, Reclassification Adjustment from AOCI, Tax Berkshire Hathaway Berkshire Hathaway [Member] Berkshire Hathaway. Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Net investment Regulatory Asset, Net Investment Regulatory Asset, Net Investment Spent Nuclear Fuel and Decommissioning Trusts Spent Nuclear Fuel And Decommissioning Trusts, Noncurrent Funds to pay for the disposal of spent nuclear fuel and the decontaminating and decommissioning of nuclear facilities through the collection of revenues from rate payers. Nonvested, beginning balance (in dollars per share) Nonvested, ending balance (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Schedule of Regulatory Assets, Early Retirement Schedule of Regulatory Assets, Early Retirement [Table Text Block] Schedule of Regulatory Assets, Early Retirement Change in Advances to Affiliates, Net Change in Advances to Affiliates, Net Payments For (Proceeds From) Advances To Affiliate Payments For (Proceeds From) Advances To Affiliate ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag North Central Wind Energy Facilities NCWF [Member] NCWF Employer matching contribution, percent of employees contribution Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Schedule of Finance Lease Liabilities Rolling Future Minimum Lease Payments Finance Lease, Liability, to be Paid, Maturity [Table Text Block] NOLC Costs NOLC - Costs [Member] NOLC - Costs Cook Plant Uprate Project Cook Plant Uprate Project [Member] Cook Plant Uprate Project [Member] Electricity, Transmission and Distribution Electricity, Transmission And Distribution Revenues [Member] Electricity, Transmission And Distribution Revenues Virginia Corporate Alternative Minimum Tax Virginia Corporate Alternative Minimum Tax [Member] Virginia Corporate Alternative Minimum Tax 2024 Michigan Power Supply Cost Recovery 2024 Michigan Power Supply Cost Recovery [Member] 2024 Michigan Power Supply Cost Recovery Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Subsequent decommissioning of the spent fuel storage facility Subsequent Decommissioning of the Spent Fuel Storage Facility Subsequent Decommissioning of the Spent Fuel Storage Facility Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts Accounts receivables that have been pledged as collateral less uncollectible accounts as of the balance sheet date. Public Utility, Property, Plant and Equipment [Line Items] Public Utility, Property, Plant and Equipment [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Benefit Obligation as of January 1, Benefit Obligation as of December 31, Defined Benefit Plan, Benefit Obligation Percentage of VIE debt guaranteed Percentage Of VIE Debt Guaranteed Percentage of DHLCs debt guaranteed by each SWEPCo and CLECO. OTHER NONCURRENT ASSETS Assets, Noncurrent [Abstract] Accretion Expense Asset Retirement Obligation, Accretion Expense Requested deferred costs, maximum, year two Public Utilities, Requested Deferred Costs, Maximum, Year Two Public Utilities, Requested Deferred Costs, Maximum, Year Two Revenue Recognition Revenue [Policy Text Block] Income Taxes, Net Income Taxes, Net [Member] Income Taxes, Net Regulatory asset, requested to be financed through securitization (in years) Regulatory Asset, Requested To Be Financed Through Securitization Period Regulatory Asset, Requested To Be Financed Through Securitization Period Mitchell Plant Non-ELG Capital Investments Mitchell Plant Non-ELG Capital Investments [Member] Mitchell Plant Non-ELG Capital Investments Net Property, Plant and Equipment Under Finance Leases Finance Lease, Right-of-Use Asset, after Accumulated Amortization Other Temporary Investments Short-Term Investments Commitments and Contingencies (Note 6) Commitments and Contingencies Peak Demand Reduction/Energy Efficiency Energy Efficiency/Peak Demand Reduction [Member] Energy Efficiency/Peak Demand Reduction. Cook Nuclear Plant Cook Nuclear Plant [Member] Cook Nuclear Plant Business Combination [Axis] Business Combination [Axis] Notes Payable Loans Payable [Member] Provision for Refund – Turk Plant Increase (Decrease) in Provision For Refund Increase (Decrease) in Provision For Refund Noncontrolling Interests Noncontrolling Interest [Member] Restricted Cash and Cash Equivalent Item [Line Items] Restricted Cash and Cash Equivalent Item [Line Items] Provision for Refund Provision For Refund [Member] Provision For Refund Schedule of Supplementary Income Statement Information Supplementary Income Statement Information [Table Text Block] Supplementary Income Statement Information Equity Method Investments in Unconsolidated Entities Equity Method Investments [Policy Text Block] Auditor Information [Abstract] Auditor Information Regulatory asset, not subject to rate normalization requirements, refund period Regulatory Asset, Not Subject to Rate Normalization Requirements, Refund Period Regulatory Asset, Not Subject to Rate Normalization Requirements, Refund Period Short-Term Debt [Line Items] Short-Term Debt [Line Items] Concentration Risk [Line Items] Concentration Risk [Line Items] Non-cash Acquisitions Under Operating Leases Non-cash Acquisitions Under Operating Leases Non-cash Acquisitions Under Operating Leases PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Asset allocations Year End Allocation Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage Unrealized Gain on Forward Commitments Unrealized Gain on Forward Commitments [Member] Unrealized Gain on Forward Commitments Member. Energy Contracts Energy Contracts [Member] Risk management commodity contracts whose primary underlying risk is tied energy contracts. Carrying Amount of the Hedged Liabilities Hedged Liability, Fair Value Hedge SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS AND RESERVES SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] AEGCo AEP Generating Co [Member] AEP Generating Company Adjusted cost of equity securities Adjusted Cost Of Equity Securities Adjusted cost of equity securities within the nuclear trusts Schedule of Asset Acquisition Asset Acquisition [Table Text Block] Underfunded Accumulated Benefit Obligation Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation Fuel Purchase Contracts Fuel Purchase Contracts [Member] Fuel Purchase Contracts. Schedule of Affiliated Revenues Affiliated Revenues [Table Text Block] Tabular disclosure of affiliated revenues. Service period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Variable Interest Component [Axis] Variable Interest Component [Axis] Variable Interest Component Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] 2025 Texas Base Rate Case 2025 Texas Base Rate Case [Member] 2025 Texas Base Rate Case Name Forgone Recovery, Individual Name Taxes Other Than Income Taxes Utilities Operating Expense, Taxes Asset Impairments and Other Related Charges Asset impairments and other related charges Other Asset Impairment Charges Disposal Group Classification [Axis] Disposal Group Classification [Axis] Weighted-Average Interest Rate Debt, Weighted Average Interest Rate Equity Equities Defined Benefit Plan, Equity Securities [Member] Securitization Bonds Securitization Bonds [Member] A collateralized debt obligation (backed by pledge, mortgage or other lien on the entity's assets). Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Amortization (Deferral) of Incremental Nuclear Refueling Outage Expenses, Net Amortization (Deferral) of Incremental Nuclear Refueling Outage Expenses, Net The net cash inflow or outflow due to Cook Unit 1 & 2 refueling outage levelization. Geographical [Axis] Geographical [Axis] SWEPCo's Share of Obligations SWEPCo's Share of Obligations [Member] SWEPCo's share of obligations. Percentage of ownership in investment called by warrants Class Of Warrant Or Right, Percentage Ownership In Investment Called by Warrants or Rights Class Of Warrant Or Right, Percentage Ownership In Investment Called by Warrants or Rights Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Regulatory Assets Deferred Tax Assets (Liabilities), Regulatory Assets Deferred Tax Assets (Liabilities), Regulatory Assets Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Capital Contributions to Subsidiaries Payment To Subsidiaries, Capital Contribution Payment To Subsidiaries, Capital Contribution Annual Composite Depreciation Rate Ranges Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Virginia Environmental Rate Adjustment Clause Virginia Environmental Rate Adjustment Clause [Member] Virginia Environmental Rate Adjustment Clause Public utilities, remaining net book recovery period Public Utilities, Recommended Recovery Period Public Utilities, Recommended Recovery Period Junior Subordinated Notes Junior Subordinated Notes [Member] Junior Subordinated Notes Member Jurisdiction [Domain] Statutory Accounting Practice, Jurisdiction [Domain] Ownership percentage selling Subsidiary, Ownership Percentage, Parent Fair value, net derivative asset (liability), recurring basis, still held, unrealized gain (loss), statement of income or comprehensive income Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] 2025 Arkansas Base Rate Case 2025 Arkansas Base Rate Case [Member] 2025 Arkansas Base Rate Case 2032 - 2034 Maturity Period Eight [Member] Maturity Period Eight. Tax credit carryforward Tax Credit Carryforward, Amount Maturity Of Fair Value Risk Management Contracts Abstract [Domain] Maturity Of Fair Value Risk Management Contracts Abstract [Domain] Maturity Of Fair Value Risk Management Contracts Abstract [Domain] Competitive Contracted Renewables Competitive Contracted Renewables [Member] Competitive Contracted Renewables Pays/paying a return Regulatory Liability, Pays A Return [Member] Regulatory Liability, Pays A Return Schedule of FERC Matters, Statement Of Income Impact FERC Matters, Statement Of Income Impact [Table Text Block] FERC Matters, Statement Of Income Impact Regulatory asset, recovery period Regulatory Asset, Recovery Period Regulatory Asset, Recovery Period Average Borrowings Average Borrowings from Money Pool Average Borrowings from a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries. Plant Retirement Costs - Unrecovered Plant, Dolet Hills Power Station - Louisiana Plant Retirement Costs - Unrecovered Plant, Dolet Hills Power Station, Louisiana [Member] Plant Retirement Costs - Unrecovered Plant, Dolet Hills Power Station, Louisiana Regulatory Assets or Liability, Regulatory Status [Domain] Regulatory Assets or Liability, Regulatory Status [Domain] Regulatory Assets or Liability, Regulatory Status [Domain] Share of energy and capacity utilized by other party, percentage Public Utilities, Share Of Energy And Capacity Utilized By Other Party, Percentage Public Utilities, Share Of Energy And Capacity Utilized By Other Party, Percentage Capital Contribution from Parent Capital Contribution from AEP Member Adjustments to Additional Paid in Capital, Capital Contribution Adjustments to Additional Paid in Capital, Capital Contribution Service Cost Defined Benefit Plan, Service Cost Change in Fair Value Recognized in AOCI, Net of Tax Other Comprehensive Income (Loss), before Reclassifications, Net of Tax IN INDIANA Money Pool Participant by Company Type [Axis] Money Pool Participant by Company Type [Axis] Money Pool Participant by Company Type. Weighted average interest rate of commercial paper outstanding during year Debt Instrument, Interest Rate During Period Illinois ILLINOIS International Equities Defined Benefit Plan, Trust Owned Life Insurance, International Equities [Member] International Equities [Member] Net book value Total Regulated Property, Plant and Equipment - Net Public Utilities, Property, Plant and Equipment, Net Award performance score, lower Share-Based Compensation Arrangement by Share-Based Payment Award, Award Performance Score, Lower Share-Based Compensation Arrangement by Share-Based Payment Award, Award Performance Score, Lower Proceeds from income tax refund, federal Proceeds from Income Tax Refund, Federal Tax Credit Carryforward Deferred Tax Assets, Tax Credit Carryforwards, General Business Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Deductions SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Beginning balance Ending balance TOTAL EQUITY Limited Liability Company (LLC) Members' Equity, Including Portion Attributable to Noncontrolling Interest Total Other Revenues Revenue Not from Contract with Customer Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Sub-limit of secured debt Sub-Limit of Secured Debt The amount of secured debt as a sub-limit to the amount of contractually defined priority debt as defined in the covenants for AEPTCo's note purchase agreements and indenture. Line of Credit Line of Credit [Member] Schedule of Customer Accounts Receivable Managed Portfolio Schedule Of Customer Accounts Receivable Managed Portfolio [Table Text Block] Customer accounts receivable managed portfolio. Schedule of Share-Based Payment Arrangement, Cost by Plan Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Equity and voting ownership percentage Equity And Voting Ownership Percentage Equity And Voting Ownership Percentage Sales to AEP Affiliates Sales To Affiliates [Member] Sales To Affiliates Obligations Under Operating Leases: Obligations Under Operating Leases [Abstract] Obligations Under Operating Leases Nuclear Incident Liability Nuclear Incident Liability [Member] Nuclear Incident Liability Member. Smart Grid Costs Smart Grid Costs [Member] Forward Sales Agreement Forward Sales Agreement [Member] Forward Sales Agreement Subsequent Event Type [Domain] Subsequent Event Type [Domain] Fair Value Hedge Instruments Fair Value Hedge Instruments [Member] Fair Value Hedge Instruments 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] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Asset acquisition, property, plant and equipment Asset Acquisition, Property, Plant and Equipment Asset Acquisition, Property, Plant and Equipment Other Income Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Actual Gain on Plan Assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Affiliated Notes Receivable Notes Receivable - Affiliated Accounts Receivable, after Allowance for Credit Loss, Noncurrent Deferred Income Taxes Deferred Income Tax Expense (Benefit) Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Revenue Revenue Benchmark [Member] Wind Wind [Member] Wind Percentage of VIE sales of lignite produced Percentage Of VIE Sales Of Lignite Produced Percentage of VIE sales of lignite produced. Revenues from: Segment Reporting Information, Profit (Loss) [Abstract] Defined benefit plan, concentration limits, in excess of all equity investments, percentage Defined Benefit Plan, Concentration Limits, In Excess of All Equity Investments, Percentage Defined Benefit Plan, Concentration Limits, In Excess of All Equity Investments, Percentage MI Michigan MICHIGAN Monthly billing, number of weeks Revenue from Contract with Customer, Monthly Billing, Number Of Weeks Revenue from Contract with Customer, Monthly Billing, Number Of Weeks All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Schedule of Assets within Fair Value Hierarchy Schedule of Allocation of Plan Assets [Table Text Block] Condensed Income Statements, Captions [Line Items] Condensed Income Statements, Captions [Line Items] Schedule of Allowance For Equity Funds Used During Construction Allowance For Equity Funds Used During Construction [Table Text Block] Allowance for equity funds used during construction. Award performance period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Performance Period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Performance Period Deferred premium assessment annual payment Deferred premium assessment annual payment Deferred premium assessment annual payment. Termination Date Trading Arrangement Termination Date Nuclear contingencies, producing power Nuclear Contingencies, Producing Power Nuclear Contingencies, Producing Power Amount collected through rider for final mine closure and reclamation costs Amount Collected Through Rider For Final Mine Closure And Reclamation Costs Total amount collected through a rider for final mine closure and reclamation costs. Operating Leases Operating Lease, Weighted Average Discount Rate, Percent Asset Acquisition, Contingent Consideration [Line Items] Asset Acquisition, Contingent Consideration [Line Items] Non-utility issuance costs Non-Utility Issuance Costs Non-Utility Issuance Costs Earns/earning a return Regulatory Assets, Earning Return [Member] Regulatory Assets, Earning Return Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Risk Management Assets Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement Segment Reporting [Abstract] Segment Reporting [Abstract] Special/Contractual Termination Benefits Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits Income Tax (Expense) Benefit Reclassification from AOCI, Current Period, Tax Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Approved equity capital structure Public Utilities, Approved Equity Capital Structure, Percentage Common Stock – Par Value (in USD per share) Common Stock, Par or Stated Value Per Share Consolidated Entities [Axis] Consolidated Entities [Axis] 2026 Finance Lease, Liability, to be Paid, Next Rolling 12 Months Net Maximum Capacity (MWs) Asset Acquisition, Acquired Facility Capacity Asset Acquisition, Acquired Facility Capacity Accrued Tax Benefits Income Taxes Receivable, Current Delinquent Securitized Accounts Receivable Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-Backed Financing Arrangement Tangible capital to tangible assets Banking Regulation, Tangible Capital Ratio, Actual Public utilities, net annual revenue increase Public Utilities, Net Annual Revenue Increase Public Utilities, Net Annual Revenue Increase Spent Nuclear Fuel Disposal Spent Nuclear Fuel Disposal [Member] Spent Nuclear Fuel Disposal Member Defined benefit plan, number of plans Defined Benefit Plan, Number Of Unfunded Non-Qualified Plans Defined Benefit Plan, Number Of Unfunded Non-Qualified Plans Use of Estimates Use of Estimates, Policy [Policy Text Block] Gross Amounts Offset Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Insider Trading Arrangements [Line Items] Purchases from related party Related Party Transaction, Purchases from Related Party Reduction related to deferred costs no longer recoverable Regulatory Asset, Reduction Related To Deferred Costs No Longer Recoverable Regulatory Asset, Reduction Related To Deferred Costs No Longer Recoverable Non-Employee Directors Non-Employee Directors [Member] Non-Employee Directors Accounts Receivable: Accounts Receivable, after Allowance for Credit Loss, Current [Abstract] Schedule of Cost for Matching Contributions to the Retirement Savings Plans Schedule of Costs of Retirement Plans [Table Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Percent of Ownership Jointly Owned Utility Plant, Proportionate Ownership Share Provision for Refund – Turk Plant Provision for Refund Provision for Refund Louisiana LOUISIANA Other Operation and Maintenance Utilities Operating Expense, Maintenance and Operations Net Transmission Services Net Transmission Services [Member] Net Transmission Services Kentucky KENTUCKY Consolidation Items [Axis] Consolidation Items [Axis] Health Care Trend Rates Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract] Schedule of Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool Schedule Of Maximum And Minimum Interest Rates For Funds Either Borrowed From Or Loaned To Utility Money Pool [Table Text Block] Tabular disclosure of the maximum and minimum weighted-average interest rate, calculated on a daily basis, of funds either borrowed from or loaned to a Utility Money Pool during the period. The Utility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain utility subsidiaries. Corporate Debt Corporate Debt Securities [Member]