Staff Recommended Annual Revenue Cap for the DIR for the First Five Months of 2024 Staff Recommended Annual Revenue Cap for the DIR for the First Five Months of 2024 Staff Recommended Annual Increase of Revenues Capped for the DIR for the First Five Months of 2024. ARO Type [Axis] ARO Type [Axis] ARO Type Inventory [Axis] Inventory [Axis] Benefit Payment or Receipt by Type [Axis] Benefit Payment or Receipt by Type [Axis] Benefit Payment by Plan Type Rockport Plant, Unit 2 Lease Amortization Lease Amortization Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability of Rockport Plant. Related Party Transactions Related Party Transactions [Abstract] Allowance for Uncollectible Accounts Allowance for Uncollectible Accounts Policy [Text Block] Describes how an entity determines the level of its allowance for doubtful accounts for its trade and other accounts receivable balances, and when impairments, charge-offs or recoveries are recognized. The description identifies the factors that influence management's establishment of the level of the allowance (for example, historical losses and existing economic conditions) and may also include discussion of the risk elements relevant to particular categories of receivables. Net Property, Plant and Equipment Under Finance Leases Finance Lease, Right-of-Use Asset, after Accumulated Amortization Wholesale Transmission [Member] Wholesale Transmission [Member] Wholesale Transmission. Total State and Local State and Local Income Tax Expense (Benefit), Continuing Operations Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Debt Instrument [Axis] Debt Instrument [Axis] Unrealized Gain on Securities Unrealized Gain on Securities Maturity Period 5 [Member] 2026 - 2027 [Member] Maturity Period 5 [Member] Gross Property Additions Property, Plant and Equipment, Additions Total Basis Point Band for Authorized Return on Equity Total Basis Point Band for Authorized Return on Equity The total range of basis points for the authorized ROE when considering excess earnings. Fair Value Measurements of Assets and Liabilities Fair Value of Financial Instruments, Policy [Policy Text Block] Direct Sales to East Affiliates [Member] Direct Sales to East Affiliates [Member] Direct Sales to East Affiliates. Foreign Debt [Member] Foreign Debt [Member] Foreign Debt [Member] AEP Credit, Inc. AEP Credit, Inc. [Member] AEP Credit, Inc. Variable Interest Entity Member Fair Value Measurement [Domain] Fair Value Measurement [Domain] Commitments, Guarantees and Contingencies (Textuals) Commitments Guarantees And Contingencies Textuals [Abstract] Commitments, Guarantees and Contingencies. Depreciation and Amortization of Property, Plant and Equipment Annual Depreciation Depreciation Amount of Increase Related to Storm Catastrophe Reserve Amount of Increase Related to Storm Catastrophe Reserve The amount of requested increase related to a storm catastrophe reserve. Deferred (Gain) Loss on Discontinuation of Fair Value Hedge Deferred (Gain) Loss on Discontinuation of Fair Value Hedge Weighted Average Discount Rate, Operating Leases Operating Lease, Weighted Average Discount Rate, Percent Leases (Textuals) Leases Textuals [Abstract] Leases Textuals Abstract. Gain (Loss) on Hedging Instruments Derivative Instruments, Gain (Loss) [Table Text Block] Common Collective Trusts [Member] Defined Benefit Plan, Common Collective Trust [Member] Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability Tangible Capital to Tangible Assets Banking Regulation, Tangible Capital Ratio, Actual Construction Work in Progress Jointly Owned Utility Plant, Ownership Amount of Construction Work in Progress Year 1 Finance Lease, Liability, Payments, Due in Next Rolling 12 Months Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Within 1 year Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value 2021 Indiana Base Rate Case 2021 Indiana Base Rate Case [Member] 2021 Indiana Base Rate Case Fair Value Held for Sale [Member] Fair Value Held for Sale [Member] Fair Value Held for Sale Current Current State and Local Tax Expense (Benefit) American Electric Power System Retirement Savings Plans American Electric Power System Retirement Savings Plans [Abstract] American Electric Power System Retirement Savings Plans Asset Removal Costs [Member] Asset Removal Costs [Member] Asset Removal Costs Member. Antidilutive Shares Outstanding Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] Cumulative Fair Value Hedging Adjustment in the Carrying Amount of the Hedged Asset (Liability) Cumulative Fair Value Hedging Adjustment in the Carrying Amount of the Hedged Asset (Liability) Cumulative Fair Value Hedging Adjustment in the Carrying Amount of the Hedged Asset (Liability) Equity Securities [Member] Defined Benefit Plan, Equity Securities [Member] AEP Generating Co to Kentucky Power Co [Member] AEP Generating Co to Kentucky Power Co [Member] AEP Generating Co to Kentucky Power Co. 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. Insurance Premium Expense to Protected Cell Insurance premium expense to protected cell Insurance premium expense to protected cell. Tax Credit Carryforward Summary of Tax Credit Carryforwards [Abstract] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Investment, Name [Domain] Investment, Name [Domain] Reconciliation of Beginning and Ending Unrecognized Tax Benefits Summary of Income Tax Contingencies [Table Text Block] AEP Energy Partners, Inc. to AEP Texas Inc. [Member] AEP Energy Partners, Inc. to AEP Texas Inc. [Member] AEP Energy Partners, Inc. to AEP Texas Inc. [Member] 2019 Texas Base Rate Case [Member] 2019 Texas Base Rate Case [Member] 2019 Texas Base Rate Case [Member] Related Party [Domain] Related Party [Domain] Second Eligible Compensation Contribution by Employee Percentage Second Eligible Compensation Contribution By Employee Percentage Second Eligible Compensation Contribution By Employee. Supplementary Information Cash Flow Information Supplemental Cash Flow Information [Abstract] Investment Tax Credits Investment Tax Credit SPP Net Transmission Service Charges SPP Net Transmission Service Charges SPP Net Transmission Service Charges Disposal, Assessed Fees and Related Interest Spent Nuclear Fuel Obligation Spent Nuclear Fuel Obligation, Noncurrent Insurance Coverage for Property Damage, Decommissioning and Decontamination Insurance Coverage For Property Damage Decommissioning And Decontamination Insurance coverage for property damage, decommissioning and decontamination. Expected Reimbursement For Spent Nuclear Fuel Dry Cask Storage Expected Reimbursement For Spent Nuclear Fuel Dry Cask Storage Future cash inflow for nuclear fuel dry cask storage reimbursement from the DOE. Beginning Balance Ending Balance Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs Entity Address, State or Province Entity Address, State or Province Securitized Debt for Receivables Short-Term Debt, Weighted Average Interest Rate, at Point in Time Base Rate [Domain] Base Rate [Domain] Base Rate Domain. Virginia Transmission Rate Adjustment Clause [Member] Transmission Rate Adjustment Clause [Member] Transmission Rate Adjustment Clause Regulatory Asset Liabilities Incurred Asset Retirement Obligation, Liabilities Incurred Environmental Controls Projects [Member] Environmental Controls Projects [Member] Environmental Controls Projects [Member] Capacity Sales Capacity Sales Capacity Sales Actuarial (Gain) Loss Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) 2026 Defined Benefit Plan, Expected Future Benefit Payment, Year Five Change for the Year Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Obligations Under Operating Leases Operating Lease Liability Due Within One Year Operating Lease, Liability, Current Net of Tax AOCI [Member] Net Of Tax AOCI [Member] Net of Tax Aoci. Lease Rental Costs Lease, Cost [Abstract] Proceeds from Divestiture of Businesses Proceeds from Divestiture of Businesses Long-term Under-recovered Fuel Costs - Oklahoma [Member] Long-term Under-recovered Fuel Costs - Oklahoma [Member] Long-term Under-recovered Fuel Costs - Oklahoma Other Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Trust Assets [Axis] Trust Assets [Axis] Trust Assets [Axis] Requested Annual Increase Requested Annual Increase Requested annual increase. Reclassifications To Accumulated Other Comprehensive Income [Domain] Reclassifications To Accumulated Other Comprehensive Income [Domain] Reclassifications To Accumulated Other Comprehensive Income Long-term Debt Long-term Debt, Excluding Current Maturities Long-Term Debt, Excluding Current Maturities Current Cumulative ENEC Under Recovery Current Cumulative ENEC Under Recovery Current Cumulative ENEC Under Recovery Staff Recommended Return on Common Equity Staff Recommended Return on Common Equity Amount of return on equity recommended by staff. Variable Interest Entities [Domain] Variable Interest Entities [Domain] Variable Interest Entities Fees Paid to AEP Credit for Customer Accounts Receivable Sold Fees Paid to AEP Credit for Customer Accounts Receivable Sold [Text Block] Fees paid to AEP Credit for customer accounts receivable sold. Net Equity Units Issuance Proceeds Net Equity Units Issuance Proceeds Net Equity Units proceeds after issuance costs. Noncash or Part Noncash Acquisition, Value of Assets Acquired Noncash or Part Noncash Acquisition, Value of Assets Acquired Renewable Energy Surcharge - Michigan [Member] Renewable Energy Surcharge - Michigan [Member] Renewable Energy Surcharge - Michigan ARO Type [Domain] ARO Type [Domain] ARO Type Weighted-Average Remaining Lease Term, Operating Leases Operating Lease, Weighted Average Remaining Lease Term Power [Member] Power Contract Member [Member] Nominal energy measure used to calculate payments on a derivative instrument. Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Estimated Payments Expected to be Made by the Pension and OPEB Plans Schedule of Expected Benefit Payments [Table Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Noncurrent Amount Recoverable from the Federal Government 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. New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Accounting Standards Update and Change in Accounting Principle [Abstract] Document Type Document Type Amount of Increase Related to Vegetation Management Amount of Increase Related to Vegetation Management The amount of requested increase related to vegetation management. Components of Net Periodic Benefit Cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Authorized Annual Base Rate Increase Authorized Annual Base Rate Increase Authorized Annual Base Rate Increase Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Reduction to revenues for amounts recognized in advance of the recording of depreciation expense for the periods January 2018 through October 2020 Reduction to revenues for amounts recognized in advance of the recording of depreciation expense for the periods January 2018 through October 2020 Reduction to revenues for amounts recognized in advance of the recording of depreciation expense for the periods January 2018 through October 2020. Rockport Plant, Unit 2 Operating Lease Payments Operating Lease Payments Rockport Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use at Rockport Plant. Tax Credit Carryforward Deferred Tax Assets, Tax Credit Carryforwards, General Business State and Local Income Taxes, Net Effective Income Tax Rate Reconciliation, Tax Settlement, State and Local, Amount Indiana Michigan Power Co to AEP Transmission Co [Member] Indiana Michigan Power Co to AEP Transmission Co [Member] Indiana Michigan Power Co to AEP Transmission Co [Member] Performance Units and AEP Career Shares Reinvested Dividends Portion For [Member] Performance Units and AEP Career Shares Reinvested Dividends Portion For [Member] Performance Units and Career Shares - the related Reinvested Dividends Portion. Junior Subordinated Notes Junior Subordinated Notes Asset Retirement Obligation, Period Increase (Decrease) Asset Retirement Obligation, Period Increase (Decrease) Wholesale and Competitive [Member] Wholesale and Competitive [Member] Revenues related to wholesale and competitive sales. Cost for Matching Contributions to the Retirement Savings Plans Schedule of Costs of Retirement Plans [Table Text Block] Guarantor Obligations, Current Carrying Value, Contingent Portion Guarantor Obligations, Current Carrying Value, Contingent Portion The contingent portion of the current carrying amount of the liability for the freestanding or embedded guarantee or each group of similar guarantees. Heating Oil and Gasoline [Member] Heating Oil And Gasoline Contract Member [Member] Nominal volume used to calculate payments on a derivative instrument. Other - Pending Transactions and Accrued Income [Member] Other Pending Transactions and Accrued Income [Member] Other Pending Transactions and Accrued Income. TOTAL MEMBER'S EQUITY TOTAL MEMBER'S EQUITY Members' Equity Long-term Debt Due Within One Year Long-term Debt, Current Maturities Long-Term Debt, Current Maturities Cost of Removal Regulatory Liability Cost of Removal Regulatory Liability The regulatory liability recorded for cost of removal. Accounting Policies [Abstract] Accounting Policies [Abstract] Gain (Loss) on Disposition of Business Gain (Loss) on Disposition of Business Plant Retirement Costs - Unrecovered Plant, Louisiana [Member] Plant Retirement Costs - Unrecovered Plant, Louisiana [Member] Plant Retirement Costs - Unrecovered Plant, Louisiana Cash Flow Hedges, Net of Tax Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Excise Taxes Excise Tax Policy [Text Block] Describes an entity's accounting policy for excise taxes. Monte Carlo Valuation Assumptions Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Arkansas ARKANSAS Capital Contribution From Parent [Member] Capital Contribution From Parent [Member] Capital Contribution From Parent Major Property Class [Axis] Major Property Class [Axis] Redemption of Noncontrolling Interest Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Details of Income Taxes as Reported Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Impairment Charge Welsh Plant, Unit 2 Impairment Charge Welsh Plant, Unit 2 Impairment recorded due to lack of return on Welsh Plant Unit 2. Affiliated Accounts Receivable Contracts with Customers Affiliated Accounts Receivable Contracts with Customers [Table Text Block] Tabular disclosure of affiliated accounts receivable contracts with customers. Depreciation, Depletion and Amortization - Regulated Depreciation, Depletion and Amortization - Regulated [Table Text Block] Regulated depreciation, depletion and amortization. Payments to Acquire Businesses, Gross Payments to Acquire Businesses, Gross Pollution Control Bonds [Member] Pollution Control Bonds [Member] Pollution Control Bonds Member. 2017-2019 Virginia Triennial Review [Member] Virginia Legislation Affecting Biennial Reviews [Member] Virginia Legislation Affecting Biennial Reviews [Member] 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. Sale Leaseback Transaction, Description [Axis] Sale Leaseback Transaction, Description [Axis] Wheeling Power Co [Member] [Domain] Wheeling Power Co [Member] [Domain] Wheeling Power Co [Member] [Domain] 2020 Texas Base Rate Case [Member] 2020 Texas Base Rate Case [Member] 2020 Texas Base Rate Case Percentage of Power Sold under Unit Power Agreement Power Agreement Between Subsidiaries In Percent Percentage of power AEGCo sells to KPCo from both units of the Rockport Plant. Other Regulatory Assets Approved for Recovery [Member] Other Regulatory Assets Being Recovered [Member] Other Regulatory Assets Being Recovered Mutual Funds Equity [Member] Mutual Fund [Member] Indiana Indiana [Member] Indiana Regulatory Assets Current Return [Domain] Regulatory Assets Currently Return [Domain] Regulatory Assets Currently Return Domain. Sundance [Member] Sundance [Member] Sundance Great Plains Energy Inc. [Member] Great Plains Energy Inc. [Member] Great Plains Energy Inc. [Member] Ohio Economic Development Rider Ohio Economic Development Rider [Member] Ohio Economic Development Rider Trading Symbol Trading Symbol Amount of Approved Increase Related to Vegetation Management Amount of Approved Increase Related to Vegetation Management Amount of Approved Increase Related to Vegetation Management Short-term Debt Short term Debt [Abstract] Short-term Debt. Employee Benefits and Pension Assets Employee Benefits and Pension Assets 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. Weighted Average Remaining Contractual Life of Nonvested Shares (in years) Share Based Compensation By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Remaining Contractual Terms Weighted average remaining contractual term for equity-based awards excluding options. Transource Energy [Member] Transource Energy [Member] Transource Energy [Member] Oklaunion Power Station Accelerated Depreciation [Member] Oklaunion Power Station Accelerated Depreciation [Member] Oklaunion Power Station Accelerated Depreciation [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] 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 Expected Contributions and Payments During 2022 Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Disposal Group, Including Discontinued Operation, Income Statement Disclosures Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] Advances to Affiliates Due from Related Parties, Current Operating Lease Liabilities Rolling Future Minimum Lease Payments Lessee, Operating Lease, Liability, to be Paid, Rolling Maturity [Abstract] Use of Estimates Use of Estimates, Policy [Policy Text Block] Other Income (Expense): Other Income (Expense) Other Nonoperating Income (Expense) [Abstract] Intercompany Power Agreement End Date Intercompany Power Agreement End Date Intercompany power agreement end date related to OVEC. Liabilities for Contracts with Cross Default Provisions Prior to Contractural Netting Arrangements Fair Value Of Derivative Liabilities Subject To Cross Default Provisions Fair value of derivative liabilities subject to cross-default provisions. Percentage of Significant Customers Concentration Risk Concentration Risk, Percentage Expensed Remaining Closed Coal Plant Expensed Remaining Closed Coal Plant Expensed Remaining Closed Coal Plant Regulatory Asset previously ordered by the Virginia SCC. Distribution Investment Rider [Member] Distribution Investment Rider [Member] Distribution Investment Rider [Member] AEP Transmission Holdco Transmission Operations [Member] Transmission Operations Member. Industrial [Member] Industrial [Member] Retail revenues from the industrial class. Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Issuance of Short-term Debt with Original Maturities Greater Than 90 Days Proceeds from Short-Term Debt, Maturing in More than Three Months Debt, Weighted Average Interest Rate Debt, Weighted Average Interest Rate Regulated Operation [Member] Regulated Operation [Member] Other Various Expenses [Member] Other Various Expenses [Member] Other Various Expenses Gain (Loss) on Disposition of Other Assets Gain (Loss) on Disposition of Other Assets Health Care Trend Rates Schedule of Health Care Cost Trend Rates [Table Text Block] Total Basic Earnings (Loss) per Share Attributable to AEP Common Shareholders Earnings Per Share, Basic Earnings Per Share, Basic Equity Payouts for Performance Units Equity Payouts for Performance Units Equity Payouts for Performance Units Construction Work in Progress Property, Plant and Equipment, Construction Work in Progress Construction in Progress, Gross Reclassifications from AOCI, before Income Tax (Expense) Benefit Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Property, Plant and Equipment and Other Related 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 Actuarial Assumptions for Benefit Obligations Defined Benefit Plan, Assumptions Used in Calculations [Abstract] Pending Reg Assets Approved in Rate Case Pending Regulatory Assets Approved in Rate Case Pending Regulatory Assets Approved in Rate Case Catastrophe Storm Reserve Catastrophe Storm Reserve [Member] Catastrophe Storm Reserve Maximum and Minimum Interest Rates Maximum and Minimum Interest Rates [Abstract] Maximum and Minimum Interest Rates. OKTCo Radial Asset Transfer [Member] OKTCo Radial Asset Transfer [Member] OKTCo Radial Asset Transfer Entity Interactive Data Current Entity Interactive Data Current 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. Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Approved interim transmission cost of service line item decrease Approved interim transmission cost of service line item decrease The approved interim transmission cost of service line item decrease approved by the PUCT. 2027-2028 [Member] Maturity Period Six [Member] Commercial Paper Commercial Paper Obligations Under Operating Leases [Domain] Obligations Under Operating Leases [Domain] Obligations Under Operating Leases Principal Amount, After 2027 Long-Term Debt, Maturity, after Year Five Statement [Line Items] Operating Loss Carryforwards [Line Items] Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax Reclassifications to AOCI, Current Period, Net of Tax, Attributable to Parent Reclassifications to AOCI, Current Period, Net of Tax, Attributable to Parent Provision for Refund-Nonaffiliated Provision for Refund-Nonaffiliated Provision for Refund-Nonaffiliated Amount of Gain (Loss) Recognized on Risk Management Contracts Gain (Loss) on Derivative Instruments, Net, Pretax Approved Rider to Recover January 2021 through September 2022 Approved Rider to Recover January 2021 through September 2022 Approved Rider to Recover January 2021 through September 2022 Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Current Assets Assets, Current [Abstract] Accrued Unbilled Revenues Unbilled Receivables, Current Vegetation Management Program [Member] Vegetation Management Program [Member] Vegetation Management Program Change in Advances from Affiliates, Net Increase (Decrease) in Notes Payable, Related Parties Initial Interest Acquired [Member] Initial Interest Acquired [Member] Initial Interest Acquired Other Cash Deposits [Member] Other Cash Deposits [Member] Other Cash Deposits [Member] Leases Leases of Lessee Disclosure [Text Block] Leases of Lessee Disclosure [Text Block] Approved Return on Common Equity Public Utilities, Approved Return on Equity, Percentage Underfunded Status, Accumulated Benefit Obligation Underfunded Status, Accumulated Benefit Obligation The funded status is measured as the difference between the fair value of plan assets and the accumulated benefit obligation. Operating Activites Net Cash Provided by (Used in) Operating Activities [Abstract] AEP Wind Holdings LLC PPAs [Abstract] Sempra Renewables LLC PPAs [Abstract] Sempra Renewables LLC PPAs [Abstract] Principal Payments for Finance Lease Obligations Financing Cash Flows Used for Finance Leases Finance Lease, Principal Payments Maximum Borrowings from Money Pool 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. Total Noncurrent Regulatory Assets [Member] Total Noncurrent Regulatory Assets [Member] Total Noncurrent Regulatory Assets UMWA Withdrawal Obligation [Member] UMWA Withdrawal Obligation [Member] New Accounting Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] Amortization of Deferred Costs [Member] Amortization of Deferred Costs [Member] Amortization of Deferred Costs on pension and OPEB in Comprehensive Income. Amount of Fuel Costs Under Review Amount of Fuel Costs Under Review The amount of fuel costs under review by a regulatory body. Year 4 Finance Lease, Liability, Payments, Due in Rolling Year Four Regulatory Asset [Axis] Regulatory Asset [Axis] Other Revenues [Member] Other Revenues [Member] Other Revenues. 2021 Approved Reduction in ENEC Projected Costs 2021 Approved Reduction in ENEC Projected Costs 2021 Approved Reduction in ENEC Projected Costs Total Fair Value and Total Intrinsic Value of Restricted Shares and Restricted Stock Units Vested Total fair value and total intrinsic value of restricted shares and restricted stock units vested [Abstract] Total fair value and total intrinsic value of restricted shares and restricted stock units vested. Lease cost NCWFs Lease cost NCWFs [Table Text Block] Lease cost NCWFs - added to be specific to NCWFs Accounts Receivable: Accounts Receivable: Accounts Receivable, after Allowance for Credit Loss, Current [Abstract] Target Asset Allocations Defined Benefit Plan, Plan Assets, Allocations [Abstract] 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. Pennsylvania Pennsylvania [Member] Pennsylvania Asset Retirement Obligation, Revision of Estimate, Estimated Reclamation Costs - 1 Asset Retirement Obligation, Revision of Estimate, Estimated Reclamation Costs - 1 Asset Retirement Obligation, Revision of Estimate, Estimated Reclamation Costs - 1 Common Stock, Shares Outstanding Common Stock, Shares, Outstanding Asset Retirement Obligation, Revision of Estimate, Estimated Reclamation Costs - 2 Asset Retirement Obligation, Revision of Estimate, Estimated Reclamation Costs - 2 Asset Retirement Obligation, Revision of Estimate, Estimated Reclamation Costs - 2 As Reported on the Balance Sheet Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures 2022 Requested Increase in ENEC Rates 2022 Requested Increase in ENEC Rates 2022 Requested Increase in ENEC Rates Enterprise Value Enterprise Value Enterprise Value Loans to Parent 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. Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Actual Gain (Loss) on Plan Assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Gain (Loss) on 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. Cash Collateral Received Netted Against Risk Management Assets Securities Received as Collateral Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Income Taxes Receivable Income Taxes Receivable Deferred Income Tax Liabilities, Net Net Deferred Tax Liabilities Deferred Income Tax Liabilities, Net Environmental Compliance Costs Environmental Compliance Costs [Member] Environmental Compliance Costs Hedging Relationship [Axis] Hedging Relationship [Axis] 2020 Louisiana Base Rate Case [Member] 2020 Louisiana Base Rate Case [Member] 2020 Louisiana Base Rate Case Estimated Final Cost Mine Reclamation Mine Reclamation and Closing Liability, Noncurrent Intervenor Recommended Annual Increase Intervenor Recommended Annual Increase Intervenor recommended minimum increase in annual rates. Beginning Balance Ending Balance Asset Retirement Obligation Performance Score by HR Committee, Lower Range Performance score by hr Committee lower range Performance score by HR Committee, lower range. Total Liabilities Derivative Liabilities Derivative Liability Accumulated Depreciation and Amortization Accumulated Amortization Accumulated Depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment ILLINOIS ILLINOIS Meals and Entertainment, Deductibility, Percentage Meals and Entertainment, Deductibility, Percentage Meals and Entertainment, Deductibility, Percentage based on the Consolidated Appropriations Act of 2021. Amount of Increase Related to Annual Depreciation Expense Amount of Increase Related to Annual Depreciation Expense The amount of requested increase related to annual depreciation expense. Cash Collateral Netting Cash Collateral Netting [Abstract] Cash collateral netting detail. Matching Contributions Provided Percentage Matching Contributions Provided Percentage Matching Contributions Provided Percentage. 2022 Defined Benefit Plan, Expected Future Benefit Payment, Year One Recorded as Recorded as [Abstract] Recorded as. 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 Kentucky Transmission Company Kentucky Transmission Company [Member] Kentucky Transmission Company Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Maximum Loans to Money Pool 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. 6.125% Corporate Units [Member] Preferred Stock [Member] Senior Notes [Member] Senior Notes [Member] Payments Made by I&M to DCC Fuel Capital lease Payments made Capital lease payments made by I&M to DCC Fuel. Apple Blossom and Black Oak [Member] Apple Blossom and Black Oak [Member] Apple Blossom and Black Oak Cash, Cash Equivalents and Restricted Cash at Beginning of Period Cash, Cash Equivalents and Restricted Cash at End of Period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents 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 Contractual Commitments Recorded Unconditional Purchase Obligations [Table Text Block] Current Liabilities Liabilities, Current [Abstract] Amortization of Nuclear Fuel Amortization of Nuclear Fuel The expense charged against earnings for the periodic recognition of nuclear fuel usage. Purchased Electricity for Resale [Member] Purchased Electricity for Resale [Member] Purchased Electricity for Resale. Plant Retirement Costs - Materials and Supplies [Member] Materials and Supplies Related to Retired Plants [Member] Materials and Supplies Related to Retired Plants [Member] Public Utilities General Disclosures [Table] Public Utilities General Disclosures [Table] Rockport Generating Plant (Unit No. 1) [Member] Rockport Generating Plant (Unit No. 1) [Member] Proposal for Decision Return on Equity Proposal for Decision Return on Equity Proposal for Decision Return on Equity Excess ADIT that is Not Subject to Rate Normalization Requirements [Member] Excess ADIT that is Not Subject to Rate Normalization Requirements [Member] Excess ADIT that is Not Subject to Rate Normalization Requirements [Member] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Risk Management Assets Derivative Asset [Abstract] Reclassifications from Accumulated Other Comprehensive Income [Member] Reclassification out of Accumulated Other Comprehensive Income [Member] Amendment Flag Amendment Flag Operating Lease, Cost Operating Lease, Cost Fair Value Hedges [Member] Fair Value Hedging [Member] Dolet Hills Power Station [Member] Dolet Hills Generating Station (Unit No. 1) [Member] Dolet Hills Generating Station (Unit No. 1) [Member] Dolet Hills Generating Station (Unit No. 1) Member Collateral Triggering Events Collateral Triggering Events [Abstract] Collateral Triggering Events Abstract. Fair Value Measurements (Textuals) Fair Value Measurements (Textuals) [Abstract] Fair Value Measurements Textuals Abstract Regulatory Asset Return Disclosure [Domain] Regulatory Asset Return Disclosure [Domain] Regulatory Asset Return Disclosure [Domain] Billings from ETT for ERCOT Wholesale Transmission Services Billings from ETT for ERCOT Wholesale Transmission Services Billings from ETT for ERCOT Wholesale Transmission Services Mergers, Acquisitions and Dispositions Disclosures Mergers, Acquisitions and Dispositions Disclosures [Text Block] Maximum Shares Issued Under Equity Units Conversion Maximum Shares Issued Under Equity Units Conversion The maximum shares that can be issued related to AEP's Equity Units Amounts Included in AOCI and Regulatory Assets Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Multiemployer Plans Withdrawal Obligation Multiemployer Plans, Withdrawal Obligation Noncurrent Liabilities [Member] Noncurrent Liabilities [Member] Noncurrent Liabilities Accounts Receivable and Accrued Unbilled Revenue Accounts Receivable and Accrued Unbilled Revenue [Abstract] Other-Than-Temporary Impairments Other than Temporary Impairment Losses, Investments, Available-for-Sale Securities Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Vertically Integrated Utilities Revenues [Member] Vertically Integrated Utilities Revenues [Member] Vertically Integrated Utilities Revenues. Welsh Plant, Units 1 and 3 [Member] Welsh Plant Unit 1 and 3 [Member] Welsh Plant Unit 1 and 3 [Member] Regulatory Assets Currently Earning Return [Member] Regulatory Assets Currently Earning Return [Member] Regulatory Assets Currently Earning a Return Operating Cash Flows Used for Operating Leases Operating Lease, Payments 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) Equity Distribution Agreement Equity Distribution Agreement [Member] Equity Distribution Agreement AEP's Investment In OVEC AEP's Investment In OVEC [Table Text Block] AEP's investment in OVEC. MICHIGAN MICHIGAN After 2026 [Member] After 5 Years [Member] Time period in which fixed performance obligations will be satisfied. Common Stock, Shares Authorized Common Stock, Shares Authorized Rock Falls [Member] Rock Falls Wind Facility [Member] Rock Falls Wind Facility Dolet Hills Power Station Accelerated Depreciation [Member] Dolet Hills Power Station Accelerated Depreciation [Member] Dolet Hills Power Station Accelerated Depreciation Cash and Cash Equivalents Cash and Cash Equivalents at Beginning of Period Cash and Cash Equivalents at End of Period Cash and Cash Equivalents, at Carrying Value Railcar Maintenance Railcar Maintenance Services Table [Text Block] Tabular disclosure of OPCo's Cook Coal Terminal - railcar maintenance. NEW MEXICO NEW MEXICO NEW JERSEY NEW JERSEY Contingently Redeemable Performance Share Awards Mezzanine Equity The fair value as of the balance sheet date of contingently redeemable performance share awards. Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Louisiana LOUISIANA Kentucky KENTUCKY Amount of Gain (Loss) Recognized on Risk Management Contracts Derivative Risk Management Contracts Gain Loss Recognized As Regulatory Asset Liability Realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets. Actual Tax Benefit Realized Share-Based Payment Arrangement, Expense, Tax Benefit Year 4 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four Approved Annual Revenue Cap for the DIR for the first five months of 2024 Approved Annual Revenue Cap for the DIR for the first five months of 2024 Approved Annual Increase of Revenues Capped for the DIR for the First Five Months of 2024. Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Total Short-term Debt Short-Term Debt Affiliated Revenues and Purchases Related Party Transaction, Due from (to) Related Party [Abstract] Other Temporary Investments Short-Term Investments Gross Amounts of Risk Management Assets/Liabilities Recognized [Member] Gross Amounts of Risk Management Assets Liabilities Recognized [Member] Gross Amounts of Risk Management Assets/Liabilities Recognized. Operating Lease Assets [Domain] Operating Lease Assets [Domain] Operating Lease Assets 2021 Louisiana Storm Cost Filing 2021 Louisiana Storm Cost Filing [Member] 2021 Louisiana Storm Cost Filing Derivative Asset, Noncurrent Derivative Asset, Noncurrent Depreciable Life Ranges - Transmission Public Utilities, Property, Plant and Equipment, Transmission, Useful Life Miscellaneous Other Receivables Capital Contributions from Member Adjustments to Additional Paid in Capital, Other Utility Plant Generation Resources Utility Plant Generation Resources Represents solar and wind generation resources PJM Load Service Entity Formula Rate True-Up PJM Load Service Entity Formula Rate True-Up [Member] PJM Load Service Entity Formula Rate True-Up Storm Related Costs [Member] Storm Costs [Member] Pollution Control Bonds Long-Term Pollution Control Bond Intercompany Item Eliminated in Consolidation Unearned Revenue Carrying amount as of the balance sheet date of unearned revenue that will be recognized over a future period of time consistent with the repayment of Transition Funding III's bond principal balance. Federal Return to Provision Federal Return to Provision The portion of the difference related to the Federal Return to Provision. Disposal Group, Including Discontinued Operation, Other Liabilities, Current Disposal Group, Including Discontinued Operation, Other Liabilities, Current Performance Units and Reinvested Dividends on Outstanding Performance Units Performance units and reinvested dividends on outstanding performance units [Text Block] Tabular disclosure of the number and weighted-average grant date fair value for performance units and career shares that were outstanding at the beginning and end of the year and the vesting period. Accounts Payable Accounts Payable, Current Accounts Payable, Current Income Tax Authority [Axis] Income Tax Authority [Axis] Authorized Short Term Borrowing Limit Authorized Short Term Borrowing Limit Authorized Short-term Borrowing Limit by regulatory orders. Intervenor Recommended Return on Common Equity Intervenor Recommended Return on Common Equity Intervenor recommended return on common equity. Boat and Barge Leases [Member] Boat and Barge Leases [Member] Boat and Barge Leases [Member] 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. Gain on Sale of Merchant Generation Assets Gain on Sale of Merchant Generation Assets Amount of gain (loss) on sale of Merchant Generation Assets. Capital Contributions from Member Proceeds from Contributions from Parent 2022 Approved Overall ENEC Rate Increase 2022 Approved Overall ENEC Rate Increase 2022 Approved Overall ENEC Rate Increase Issuance of Common Stock, Net Proceeds from Issuance of Common Stock Equity Method Investment, Ownership Percentage Equity Method Investment, Ownership Percentage Change in Fair Value of Plan Assets Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Gain (Loss) on Disposition of Assets Gain (Loss) on Disposition of Assets Interest Expense, Related Party Interest Expense, Related Party Total Long-Term Debt Outstanding [Axis] Total Long-Term Debt Outstanding [Axis] Total Long-Term Debt Outstanding Redeemable Noncontrolling Interest Redeemable Noncontrolling Interest, Equity, Carrying Amount Long-term Debt Schedule of Debt [Table Text Block] Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Share-based Payment Arrangement, Noncash Expense [Abstract] Share-Based Payment Arrangement, Noncash Expense [Abstract] Benefit Plans (Textuals) [Abstract] Benefit Plans Textuals [Abstract] Benefit Plans Textuals [Abstract] Benefit Plans. Less than 1 year Recorded Unconditional Purchase Obligation, to be Paid, Year One PJM Costs and Off-system Sales Margin Sharing - Indiana [Member] PJM Costs and Off-system Sales Margin Sharing [Member] PJM Costs and Off-system Sales Margin Sharing [Member] Lease Policy Lessee, Leases [Policy Text Block] TOTAL OTHER NONCURRENT ASSETS Other Noncurrent Assets Assets, Noncurrent INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS) Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Stock-based Compensation Share-Based Payment Arrangement [Text Block] Demand Side Management Programs [Member] Demand Side Management Programs [Member] Demand Side Management Programs Compensation Cost and Actual Tax Benefit Realized for Tax Deductions from Compensation Cost for Share-based Payment Arrangements Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Rockport Plant, Unit 2 Operating Lease Amortization Operating Lease Cost Rockport Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability of Rockport Plant. Capitalized Portion Capitalized Portion Of Net Periodic Benefit Cost Capitalized portion of Net Periodic Benefit Cost. Impact of Fair Value Hedges on Balance Sheet Impact of Fair Value Hedges on Balance Sheet [Table Text Block] Impact of Fair Value Hedges on Condensed Balance Sheet [Table Text Block] Jointly Owned Utility Plant [Domain] Jointly Owned Utility Plant [Domain] Financing Activities (Textuals) Financing Activities Textuals [Abstract] Financing Activities. Mutual Funds Equity [Member] Mutual Funds Equity [Member] Mutual Funds Equity Louisiana Jurisdiction [Member] Louisiana Jurisdiction [Member] Louisiana Jurisdiction PENNSYLVANIA PENNSYLVANIA Related Party [Axis] Related Party [Axis] Estimated Turk AFUDC Refunds Estimated Turk AFUDC Refunds Estimated Turk AFUDC Refunds Ownership Interest in Mitchell Power Plant Ownership Interest in Mitchell Power Plant Ownership Interest in Mitchell Power Plant AEP's Ownership In OVEC Cost Method Investment Ownership Percentage This item represents the ownership percentage of all cost-method investments. Requested Net Annual Increase Requested Net Annual Increase The amount requested for net annual increase. Regulatory Assets Pending Final Regulatory Approval [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Not Yet Being Recovered Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Equity Payouts For Career Share Distributions Equity Payouts For Career Share Distributions Equity Payouts For Career Share Distributions Supplemental Income Statement Elements Supplemental Income Statement Elements [Abstract] Current Fiscal Year End Date Current Fiscal Year End Date Competitive Contracted Renewables NBV Competitive Contracted Renewables NBV Competitive Contracted Renewables NBV 2021 Oklahoma Base Rate Case 2021 Oklahoma Base Rate Case [Member] 2021 Oklahoma Base Rate Case Oklahoma OKLAHOMA Dilutive Securities, Effect on Basic Earnings Per Share Dilutive Securities 1 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. Other Property Class [Member] Other Property Class [Member] Other Property Class Staff and Intervenor Recommended Return on Equity Staff and Intervenor Recommended Return on Equity Staff and Intervenor Recommended Return on Equity Public Utilities, Approved Equity Capital Structure, Percentage Public Utilities, Approved Equity Capital Structure, Percentage AOCI Gain (Loss) Net of Tax Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Changes in the Fair Value of Net Trading Derivatives and Other Investments Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Term Loan 2 Term Loan 2 [Member] Term Loan 2 Customer Concentration Risk Customer Concentration Risk [Member] 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 Summary of Units Awarded and Fair Value of Restricted Stock Units Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Proceeds of Mineral Rights Sale Proceeds of Mineral Rights Sale [Member] Proceeds of Mineral Rights Sale Impairments, Disposition and Assets and Liabilities Held for Sale Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Unrecognized Tax Benefits, if Recognized - Amount Unrecognized Tax Benefits that Would Impact Effective Tax Rate All Other, Net 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. 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. Net Under-Recovered Fuel Costs Net Under-Recovered Fuel Costs Net Under-Recovered Fuel Costs Deferred Fuel Costs [Member] Deferred Fuel Costs [Member] Regulatory Liabilities [Member] Regulatory Liabilities [Member] Regulatory Liabilities. Comparative Accounts Receivable Information [Text block] Comparative Accounts Receivable Information Comparative Accounts Receivable Information [Text block] Comparative accounts receivable information. Depreciation, Depletion and Amortization Depreciation, Depletion And Amortization [Abstract] Depreciation, Depletion and Amortization. Schedule Of Cost Method Investment Cost Method Investee Name [Domain] Schedule Of Cost Method Investment Cost Method Investee Name [Domain] Name of each investee in which the entity has an investment accounted for under the cost method of accounting. Servicing Contracts [Member] Servicing Contracts [Member] Weighted Average Remaining Lease Term, Finance Leases Finance Lease, Weighted Average Remaining Lease Term Virginia VIRGINIA Recognition Period [Domain] Recognition Period [Domain] [Domain] for Recognition Period [Axis] Exchange [Domain] Exchange [Domain] Average Loans to Money Pool 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. The NASDAQ Stock Market NASDAQ - ALL MARKETS [Member] Shares/Units, Vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Entity Tax Identification Number Entity Tax Identification Number Depletion Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depletion, Amount Maturity Date High Debt Instrument Maturity Date Range High Earliest date the outstanding debt instruments are required to be repaid. Lease Term Lease Term The term of the lease. Jointly Owned Utility Plant, Proportionate Ownership Share Percent of Ownership Jointly Owned Utility Plant, Proportionate Ownership Share Cash [Member] Cash [Member] Vegetation Management - Texas Vegetation Management - Texas [Member] Vegetation Management - Texas Approved Item [Domain] Approved Item [Domain] [Domain] for Approved Item [Axis] Pension and OPEB Activity [Domain] Pension and OPEB Activity [Domain] Pension and OPEB activity. Debt and Equity Securities Within Other Temporary Investments Debt and Equity Securities Within Other Temporary Investments [Text Block] Debt and equity securities within Other Temporary Investments. Medicare Subsidy Receipts [Member] Medicare Subsidy Receipts [Member] Medicare Subsidy Receipts. Property Related Temporary Differences Deferred Tax Assets Liabilities Net 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. Tennessee TENNESSEE Jurisdiction [Domain] Statutory Accounting Practices, Jurisdiction [Domain] Supplementary Information Supplementary Information [Abstract] Supplementary Information. Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock Unit Accumulation Plan for Non-employee Directors Share-Based Payment Arrangement, Nonemployee Director Award Plan, Activity [Table Text Block] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] 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 Central Transition Funding Co [Member] AEP Texas Central Transition Funding Co [Member] AEP Texas Central Transition Funding Company Variable Interest Entity Member Maturity of Credit Facility [Domain] maturityofcreditfacility [Domain] [Domain] for maturityofcreditfacility [Axis] Contracted Renewables GWs Contracted Renewables GWs Contracted Renewables GWs Approved Rider to Recover Dolet Hils and Pirkey Costs Approved Rider to Recover Dolet Hils and Pirkey Costs Approved Rider to Recover Dolet Hils and Pirkey Costs City Area Code City Area Code Other Current Assets Increase (Decrease) in Other Current Assets DCC Fuel [Member] DCC Fuel [Member] DCC Fuel Variable Interest Entity Member Pension and Other Postretirement Plans Pension and Other Postretirement Plans, Policy [Policy Text Block] Virginia Clean Economy Act [Member] Virginia Clean Economy Act [Member] Virginia Clean Economy Act Types of Related Party Purchases [Axis] Types of Related Party Purchases [Axis] Types of related party purchases. Funded (Underfunded) Status Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position Emission Allowances and Renewable Energy Credits Emission Credits or Allowances, Policy [Policy Text Block] Recommended Disallowance from Staff or Intervenors Recommended Disallowance from Staff or Intervenors Recommended disallowance from either staff or intervenors in current case. Regulatory Liabilities Regulatory liabilities are comprised [Abstract] Regulatory liabilities are comprised Abstract. Item to be Refunded in Commission Order Item to be Refunded in Commission Order An item to be refunded in commission order. Weighted Average Interest Rate Long-Term Debt, Weighted Average Interest Rate, at Point in Time Noncash Investing and Financing Activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Comparative Accounts Receivable Information Comparative Accounts Receivable Information [Table Text Block] Comparative Accounts Receivable Information Interest Rate Contract [Member] Interest Rate Contract [Member] Equity Earnings (Loss) of Unconsolidated Subsidiaries Income (Loss) from Equity Method Investment Less: Equity Earnings Equity Method Investment Income Income (Loss) from Equity Method Investments Reclamation Complete Date Reclamation Complete Date Reclamation Complete Date related to Sabine. Equity Method Ownership [Domain] Equity Method Ownership [Domain] [Domain] for Equity Method Ownership [Axis] CARES Act Provision CARES ACT Provision The portion of the difference related to the CARES Act Provision. Acquisition of Assets Payments to Acquire Property, Plant, and Equipment Payments to Acquire Property, Plant, and Equipment Related Party Sales of Property Related Party Sales of Property AEP subsidiaries' sales of property with certain affiliates. Regulated Status [Domain] Regulated Status [Domain] Regulated Status [Domain] Weighted Average [Member] Weighted Average [Member] Impact of Cash Flow Hedges on the Balance Sheet Impact of Cash Flow Hedges on our Consolidated Balance Sheet [Abstract] Impact of Cash Flow Hedges on our Consolidated Balance Sheet. Benefit Obligation as of January 1 Benefit Obligation as of December 31 Projected Benefit Obligation Defined Benefit Plan, Benefit Obligation TEXAS TEXAS Non-Affiliate Interest Non-Affiliate Interest Non-affiliate member's interest in Desert Sky Wind Farm LLC and Trent Wind Farm LLC for repowering. Refund for Excess ADIT Not Subject to Rate Normalization Requirements Refund for Excess ADIT Not Subject to Rate Normalization Requirements Amount of refund to be given through rate reductions, riders, etc related to Excess ADIT Not Subject to Rate Normalization Requirements. Other Postretirement Benefit Plans [Member] Other Postretirement Benefits Plan [Member] Previously Collected Rates Subject to Reconciliation [Member] Previously Collected Rates Subject to Reconciliation [Member] Previously Collected Rates Subject to Reconciliation [Member] Rate of Compensation Increase Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase 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. Staff Recommended Annual Rate Increase Staff Recommended Annual Rate Increase The staff's recommended annual rate increase. Acquisition of Nuclear Fuel Included in Current Liabilities as of December 31, Acquisition Of Nuclear Fuel Included In Current Liabilities Future cash outflow to pay for acquired nuclear fuel. Regulated Generating Units to be Retired Regulated Generating Units to be Retired [Table Text Block] Regulated Generating Units to be Retired. Entity Address, Postal Zip Code Entity Address, Postal Zip Code Environmental Expense Deferral - Virginia [Member] Environmental Expense Deferral - Virginia [Member] Environmental Expense Deferral - Virginia 2013 Reversal Of Previously Recorded Regulatory Disallowances 2013 Reversal Of Previously Recorded Regulatory Disallowances The 2013 reversal of previously recorded regulatory disallowances. 2020 Ohio Base Rate Case [Member] 2020 Ohio Base Rate Case [Member] 2020 Ohio Base Rate Case Recognition Period [Axis] Recognition Period [Axis] Recognition Period [Axis] State Income Tax Rate Changes State Income Tax Rate Changes [Member] State Income Tax Rate Changes Pension and OPEB Funded Status, Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Net Income Tax Operating Loss Carryforwards Operating Loss Carryforwards [Abstract] Operating Loss Carryforwards [Abstract] PJM Annual Formula Rate True-up [Member] PJM Annual Formula Rate True-up [Member] PJM Annual Formula Rate True-up Regulatory Assets Regulatory assets are comprised [Abstract] Regulatory assets are comprised Abstract. Changes in Fair Value Allocated to Regulated Jurisdiction 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. Letters of Credit Limit Line of Credit Facility, Maximum Borrowing Capacity Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Ohio ESP Filings [Member] Ohio ESP Filings [Member] Ohio ESP Filings Additional 10 Percent [Member] Additional 10 Percent [Member] Additional 10 Percent Alternative [Member] Alternative [Member] Alternative [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Proceeds from Issuance of Debt Proceeds from Issuance of Debt Pension Contributions to Qualified Plan Trust Payment for Pension Benefits Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits Utility Money Pool Participants Money Pool Activity And Authorized Borrowing Limits [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. Decrease - Lapse of the Applicable Statute of Limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Pension and OPEB Activity [Axis] Pension and OPEB Activity [Axis] Pension and OPEB activity. Net Periodic Benefit Cost (Credit) Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Other Current Liabilities Increase (Decrease) in Other Current Liabilities Performance Units [Member] Performance Units [Member] Performance Units. Meter Replacement Costs [Member] Meter Replacement Costs [Member] Meter Replacement Costs Term Loan 3 Term Loan 3 [Member] Term Loan 3 State Transcos [Member] State Transcos [Member] State Transcos [Member] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Anticipated Pretax Loss Range Lower Anticipated Pretax Loss Range Lower Anticipated Pretax Loss Range Lower Lessee, Finance Leases Lessee, Finance Leases [Text Block] Secured Debt Securitization Bonds Secured Debt ARO [Axis] ARO [Axis] ARO Amortization of Prior Service Cost (Credit) Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Customers Accounts Receivable, before Allowance for Credit Loss, Current Revisions in Cash Flow Estimates Asset Retirement Obligation, Revision of Estimate Regulatory Assets Schedule of Regulatory Assets [Table Text Block] Schedule of Regulatory Assets [Table Text Block] West Virginia WEST VIRGINIA Total Assets Assets, Fair Value Disclosure Delinquent Securitized Accounts Receivable Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-Backed Financing Arrangement Hedging Contracts [Member] Hedging Contracts [Member] PJM Net Transmission Service Charges PJM Net Transmission Service Charges PJM Net Transmission Service Charges Lessee, Operating Leases Lessee, Operating Leases [Text Block] Income Tax Expense Re-Measurement Income Tax Expense Re-Measurement Income Tax Expense change due Re-Measurement of Deferred Taxes Cash, Cash Equivalents and Restricted Cash Cash, Cash Equivalents and Restricted Cash [Abstract] Cash, Cash Equivalents and Restricted Cash [Abstract] Derivative Instrument [Axis] Derivative Instrument [Axis] Cash Paid (Received) for: Cash Paid Received for [Abstract] Cash Paid (Received) for. Carrying Amount of Hedged Asset (Liability) Carrying Amount of Hedged Asset (Liability) Carrying Amount of Hedged Asset (Liability) Regulatory Assets Current Return [Axis] Regulatory Assets Currently Return [Axis] Regulatory Assets Currently Return Axis. Regulated Operations [Abstract] Regulated Operations [Abstract] Over-recovered Deferred Wind Costs - Virginia [Member] Over-recovered Deferred Wind Costs - Virginia [Member] Over-recovered Deferred Wind Costs - Virginia Accumulated Benefit Obligation Accumulated Benefit Obligation [Text Block] Table containing the Accumulated Benefit Obligation as a single block of text. Interim WACC Interim WACC Interim Weighted Average Cost of Capital Estimated Future Benefit Payments and Contributions Defined Benefit Plan, Expected Future Benefit Payment [Abstract] Customer Accounts Receivable Managed Portfolio Customer Accounts Receivable Managed Portfolio [Abstract] Customer accounts receivable managed portfolio. Prior Service Cost (Credit) Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax Net Cash Flows from Operating Activities Net Cash Provided by (Used in) Operating Activities 2022 [Member] Less Than 1 Year [Member] Time period in which fixed performance obligations will be satisfied. Total Assets Derivative Assets Derivative Asset Payment When Put in Service Payment When Put in Service [Member] Payment When Put in Service Tax Reform Excess ADIT Reversal Tax Reform Excess ADIT Reversal The portion of the difference related to Tax Reform Excess ADIT Reversal. Wheeling Power Company Wheeling Power Company [Member] Wheeling Power Company Distribution [Member] Distribution [Member] Distribution Member Certified Performance Score Share Based Compensation Certified Performance Score Certified Performance Score as approved by Human Resources Committee of the Board of Directors. 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 Contractual Commitments Recorded Unconditional Purchase Obligation, Fiscal Year Maturity Schedule [Abstract] Entity Listings, Exchange [Axis] Entity Listings, Exchange [Axis] Subsidiaries [Member] AEP Subsidiaries [Member] Subsidiaries [Member] Employee Benefits and Pension Obligations - Accrued Long-term Benefit Liability Liability, Defined Benefit Plan, Noncurrent Percent of Excess Earnings Subject to Refund Percent of Excess Earnings Subject to Refund The percent of excess earnings that are subject to refund during the Virginia Trienniel Review Issuance of Common Stock, Value Stock Issued During Period, Value, New Issues Coal Transloading Services Coal Transloading Services Cook Coal Terminal, a division of OPCo, performs coal transloading services at cost. 2021 Arkansas Rate Case 2021 Arkansas Rate Case [Member] 2021 Arkansas Rate Case Securities Loaned Securities Loaned Maximum Exposure Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Eligible Compensation Contribution by Employee Percentage Eligible Compensation Contribution By Employee Percentage Eligible Compensation Contribution by Employee. Re-Establishment of Regulatory Asset - Coal Fired Generation Re-Establishment of Regulatory Asset 2017-2019 Virginia Triennial Review Re-Establishment of Regulatory Asset Segments [Axis] Segments [Axis] Financing Activities Debt Disclosure [Text Block] Effects of Regulation Schedule of Regulatory Assets and Liabilities [Text Block] 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 Finance Lease, Right-of-Use Asset, after Accumulated Amortization [Axis] Finance Lease, Right-of-Use Asset, after Accumulated Amortization [Axis] Finance Lease, Right-of-Use Asset, after Accumulated Amortization Direct Sales to AEPEP [Member] Direct Sales to AEPEP [Member] Direct Sales to AEPEP. Amount of Increase Related to North Central Wind Facilities Amount of Increase Related to North Central Wind Facilities Amount of Increase Related to North Central Wind Facilities Principal Amount, 2025 Long-Term Debt, Maturity, Year Three Maturity Period Seven [Member] 2028 - 2033 [Member] Maturity Period Seven [Member] Amortization of Prior Service Cost (Credit) Amortization of Prior Service Credit (Cost) Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax Changes in Accumulated Other Comprehensive Income (Loss) by Component Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] TOTAL ASSETS Total Assets Total Assets Assets Illinois Illinois [Member] Illinois Earnings Per Share Basic and Diluted EPS Calculations Earnings Per Share [Abstract] Total Contractual Commitments Recorded Unconditional Purchase Obligation Additional Refund for Current Year Tax Reform Rate Change Additional Refund for Current Year Tax Reform Rate Change Additional refund for current year tax reform rate change as recommended by staff. Antidilutive Securities [Axis] Antidilutive Securities [Axis] Margin Deposits Margin Deposit Assets Requested Return on Equity Public Utilities, Requested Return on Equity, Percentage Credit Concentration Risk Credit Concentration Risk [Member] Peak Demand Reduction/Energy Efficiency [Member] Peak Demand/Energy Efficiency [Member] Peak Demand/Energy Efficiency [Member] Long-term Debt, Fair Value Long-Term Debt, Fair Value Securities Activity Within the Decommissioning and SNF Trusts Securities Activity Within Decommissioning and SNF Trusts [Abstract] Securities Activity Within Decommissioning And Snf Trusts. Flat Ridge II Flat Ridge II [Member] Flat Ridge II Long-term Debt Long-Term Debt, Unclassified [Abstract] Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member] Generation [Member] Electricity, Generation [Member] Pretax Income Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Segments [Domain] Segments [Domain] Basic and Diluted EPS Calculations Earnings Per Share [Text Block] Regulatory Asset [Domain] Regulatory Asset [Domain] Lines of Credit and Short-term Debt Schedule of Short-Term Debt [Table Text Block] AEP Transmission Co [Member] AEP Transmission Co [Member] AEP Transmission Company, LLC. Trusted Owned Life Insurance [Member] Trusted Owned Life Insurance [Member] Trusted Owned Life Insurance Member Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] TOTAL COMPREHENSIVE INCOME (LOSS) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Year 2 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two Dolet Hills Power Station Fuel Costs - Louisiana Dolet Hills Power Station Fuel Costs - Louisiana [Member] Dolet Hills Power Station Fuel Costs - Louisiana Operational Contingencies [Axis] Operational Contingencies [Axis] Operational Contingencies Accrued Tax Benefits Income Taxes Receivable, Current Benefit Amounts Recognized on the Balance Sheets Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] 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. Revenue from Contracts with Customers Generation and Marketing Revenues Revenue from Contract with Customer, Including Assessed Tax Revenue Textuals Revenue Textuals [Abstract] Revenue Textuals Abstract. Issuance of Common Stock, Shares Issued Stock Issued During Period, Shares, New Issues Capital Distribution of Radial Assets to Member Capital Distribution of Radial Assets Capital Distribution of Radial Assets to Member. Variable Interest Entities [Abstract] Variable Interest Entities [Abstract] Entity Address, City or Town Entity Address, City or Town Reconciliation of Cash, Cash Equivalents and Restricted Cash Reconciliation of Cash, Cash Equivalents and Restricted Cash [Table Text Block] Reconciliation of Cash, Cash Equivalents and Restricted Cash [Table Text Block] Expenses Expenses Operating Expenses [Abstract] Tax Cuts and Jobs Act, Non Deductible Executive Compensation Tax Cuts and Jobs Act, Non Deductible Executive Compensation Tax Cuts and Jobs Act, Non Deductible Executive Compensation Threshold. Changes in Funded Status [Member] Changes in Funded Status [Member] Changes in funded status on Pension and OPEB in Comprehensive Income. Noncontrolling Interests Stockholders' Equity Attributable to Noncontrolling Interest Restricted Cash Restricted Cash Restricted Cash and Cash Equivalents, Current 2022 Minimum Lease Payments, Sale Leaseback Transactions, within Two Years Mark-to-Market of Risk Management Contracts Unrealized Gain (Loss) on Derivatives Asset Retirement Obligations Asset Retirement Obligations, Noncurrent Income Taxes Subject to Flow Through [Member] Income Taxes Subject to Flow Through [Member] Income Taxes Subject to Flow Through [Member] Unbilled Receivables Related to Securitization, Sale of Accounts Receivable 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. Noncash Increase in Advances to Affiliates, Net due to Contribution of Mutual Energy SWEPCo, LLC Noncash Contribution of Assets by Noncontrolling Interest Noncash Contribution of Assets by Noncontrolling Interest Noncash or Part Noncash Acquisition, Investments Acquired Net Income Tax Operating Loss Carryforward Operating Loss Carryforwards Pension and Other Postretirement Benefit Plans [Member] Postemployment Retirement Benefits [Member] Approved Previously Incurred Costs to Recover Approved Previously Incurred Costs to Recover Approved Previously Incurred Costs to Recover Oklaunion Generating Station [Member] Oklaunion Generating Station [Member] Oklaunion Generating Station Purchased Electricity for Resale [Member] Electricity, Purchased [Member] Purchases of Investments Payments to Acquire Short-Term Investments Materials and Supplies Materials and Supplies Other Inventory, Supplies, Gross Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] Entity Information [Line Items] Entity Information [Line Items] Railcar Maintenance Railcar Maintenance SWEPCo and Cook Coal Terminal, a division of OPCo, perform railcar maintenance services. Pirkey Power Plant and Sabine Unbilled Fixed Costs Pirkey Power Plant and Sabine Unbilled Fixed Costs Pirkey Power Plant and Sabine unbilled fixed costs that will be billed to SWEPCo prior to closure. TOTAL REVENUES Total Revenues Revenues Revenues Assessed Amount per Nuclear Incident Assessed amount per nuclear incident Assessed amount per nuclear incident. Production Tax Credits Production Tax Credits Production tax credits that are recorded in AEP's consolidated income Tax Expense (Benefit) total. Proposal for Decision Disallowance Proposal for Decision Disallowance Proposal for Decision Disallowance Guarantees of Mine Reclamation, Amount Guarantees Of Mine Reclamation Amount Guarantees Of Mine Reclamation Amount Guarantees of mine reclamation, amount. Vegetation Management - AEP Texas [Member] Vegetation Management - AEP Texas [Member] Vegetation Management - AEP Texas Regulatory Asset for Under-Recovered Fuel Costs Current Regulatory Assets Regulatory Asset, Current Phased In Annual Increase 2022 Phased In Annual Increase 2022 Phased in Annual Increase in rate starting in 2022 Phased in Annual Increase 2023 Phased in Annual Increase 2023 Phased in Annual Increase in rate starting in 2023 Cash Paid for Interest, Net of Capitalized Amounts Interest Paid, Excluding Capitalized Interest, Operating Activities Partners' Capital Account, Units, Treasury Units Reissued Partners' Capital Account, Units, Treasury Units Reissued Other Assets [Member] Other Assets [Member] Pension and OPEB [Member] Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Arkansas Arkansas [Member] Arkansas Concentration Risk Type [Domain] Concentration Risk Type [Domain] TOTAL COMMON SHAREHOLDERS' EQUITY Stockholders' Equity Attributable to Parent Year 3 Finance Lease, Liability, Payments, Due in Rolling Year Three Excess ADIT and Excess Federal Income Taxes to Transmission Customers [Member] Excess ADIT and Excess Federal Income Taxes to Transmission Customers [Member] Excess ADIT and Excess Federal Income Taxes to Transmission Customers [Member] Fixed Performance Obligations Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Stock Based Compensation [Member] Stock Based Compensation [Member] Stock Based Compensation Derivatives and Hedging Derivative Instruments and Hedging Activities Disclosure [Text Block] Tax Credit Carryforward, Amount Tax Credit Carryforward, Amount Noncash Acquisitions Under Finance Leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Weighted Average Grant Date Fair Value, Shares/Units, Forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value 6.125% Corporate Units Preferred Stock 2 [Member] Preferred Stock 2 Asset Retirement Obligation Asset Retirement Obligation [Policy Text Block] Commitment from Bank Conduits to Finance Receivables Two Commitment from Bank Conduits to Finance Receivables Two Commitment from Bank Conduits to Finance Receivables Two Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table] Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table] Change in Advances to Affiliates, Net Increase (Decrease) in Notes Receivable, Related Parties North Central Wind Energy Facilities North Central Wind Energy Facilities [Member] North Central Wind Energy Facilities Storm Expenses to be Requested in Separate Filing Storm Expenses to be Requested in Separate Filing Storm Expenses to be Requested in Separate Filing Oklaunion Purchase Power Agreement Oklaunion Purchase Power Agreement AEP Texas has partial ownership in the Oklaunion Plant which is operated by PSO but has leased its entire portion of the output of the plant to a non-utility affiliate. This is the noncurrent liability portion of the lease. Remaining Refund Period Regulatory Liability, Amortization Period Commodity Commodity [Abstract] Commodity. Retained Earnings [Member] Retained Earnings [Member] 2025-2026 [Member] 4-5 Years [Member] Time period in which fixed performance obligations will be satisfied. Total Lease Rental Costs Lease, Cost Pirkey Power Plant [Member] Pirkey Generating Station (Unit No. 1) [Member] Pirkey Generating Station (Unit No. 1) [Member] Pirkey Generating Station (Unit No. 1) Member Common Stock, $6.50 par value [Member] Common Stock [Member] Common Stock [Member] Lease Rental Costs Lease, Cost [Table Text Block] Regulatory Liability [Domain] Regulatory Liability [Domain] Voluntary Retirement Incentive Program [Domain] Voluntary Retirement Incentive Program [Domain] Voluntary Retirement Incentive Program Appalachian Power Co [Member] Appalachian Power Co [Member] Appalachian Power Company Member ETT [Member] ETT [Member] ETT [Member] Increase (Decrease) in Margin Deposits Outstanding Increase (Decrease) in Margin Deposits Outstanding Weighted Average Grant Date Fair Value, Vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Interest Rate Debt Instrument, Interest Rate, Effective Percentage Stock Issued During Period, Shares, Stock Splits Stock Issued During Period, Shares, Stock Splits Investment in Partnership Deferred Tax Liabilities, Investments Regulatory Assets Deferred Tax Liabilities, Regulatory Assets Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Securitized Debt Securitized Debt [Member] Securitized Debt Total Accounts Receivable Accounts Receivable, after Allowance for Credit Loss, Current United States Government and Agency Securities [Member] US Treasury and Government [Member] Equity Components [Axis] Equity Components [Axis] Major Property Class [Domain] Major Property Class [Domain] Benefit Amounts Recognized on the Balance Sheets Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Accumulated Depreciation Jointly Owned Utility Plant, Ownership Amount of Plant Accumulated Depreciation Estimated Contributions and Payments to the Pension and OPEB Plans Schedule Of Estimated Contributions And Payments To Pension And O P E B Plans [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. Carrying Costs Income Carrying Costs Income Carrying Costs Income Income recorded to accrue a return on certain regulatory assets as granted by a regulator. Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Total Propery, Plant and Equipment - Net [Domain] Total Propery, Plant and Equipment - Net [Domain] Total Propery, Plant and Equipment - Net [Domain] Natural Gas [Member] Natural Gas Contracts [Member] Natural Gas Contract [Member] Nominal energy measure used to calculate payments on a derivative instrument. Ohio Basic Transmission Cost Rider [Member] Basic Transmission Cost Rider [Member] Basic Transmission Cost Rider [Member] 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 Vertically Integrated Utilities [Member] Electricity [Member] Finance Lease, Liability [Domain] Finance Lease, Liability [Domain] Finance Lease, Liability [Domain] Total Fair Value and Total Intrinsic Value of Restricted Shares and Restricted Stock Units Vested Total fair value and total intrinsic value of restricted shares and restricted stock units vested [Text Block] Tabular disclosure of the total intrinsic value of restricted shares and restricted stock units vested, and the total fair value of restricted shares and restricted stock units vested during the year. Amount of Increase Related to Annual Depreciation Rates due to Increased Depreciation Expense Amount of Increase Related to Annual Depreciation Rates due to Increased Depreciation Expense Increase related to annual depreciation rates due to increased depreciation expense requested. Statement [Line Items] Statement [Line Items] Liability Coverage Under the Price-Anderson Act Liability coverage under Price Anderson Act Liability coverage under the Price-Anderson Act. Year 3 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three Annual Composite Depreciation Rate Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service Underfunded Benefit Obligation Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] Pension and OPEB Amortization Of Pension And Other Postretirement Benefit Plans [Abstract] Accumulated Other Comprehensive Income [Member] AOCI Attributable to Parent [Member] Comprehensive Income Comprehensive Income (Loss) Note [Text Block] Auditor Firm ID Auditor Firm ID Base Rate [Axis] Base Rate [Axis] Base Rate Axis. Change in Fair Value Recognized in AOCI Change in Fair Value Recognized in AOCI Other Comprehensive Income Unrealized Gain Loss Arising During Period Net Of Tax Net of tax amount, before reclassification adjustments, of the change in accumulated gain (loss). Notional Volume Of Derivative Instruments Notional Volume Of Derivative Instruments [Abstract] Notional Volume Of Derivative Instruments Abstract. Direct Purchases from AEGCo [Member] Purchases from AEGCo [Member] Purchases from AEGCo. Other Operation Expense [Member] Other Operation Expense [Member] Other operation expense. Removal Costs Increase Decrease in Income Taxes Due to Removal Costs The portion of the difference between total income tax expense (benefit) as reported in the Income Statement and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations due to removal costs. FTRs [Member] Financial Trasnsmission Rights [Member] Risk management commodity contracts whose primary underlying risk is tied financial transmission rights. State and Local Jurisdiction State and Local Jurisdiction State and Local Jurisdiction [Member] Concept not found: {http://fasb.org/us-gaap/2020-01-31}InterimPeriodCostsNotAllocableDomain Interim Period, Costs Not Allocable [Domain] Effects of Regulation [Abstract] Effects of Regulation [Abstract] Estimated Reduced Annual Revenues Estimated Reduced Annual Revenues Estimated Reduced Annual Revenues Amortization of Actuarial (Gains) Losses Amortization of Actuarial Gain (Loss) Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Anticipated After Tax Loss Range Lower Anticipated After Tax Loss Range Lower Anticipated After Tax Loss Range Lower Period with No Change in Unrecognized Tax Benefits Period with No Change in Unrecognized Tax Benefits Period within which there will be no change in unrecognized tax benefits. Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Southwestern Electric Power Co [Member] Southwestern Electric Power Co [Member] Southwestern Electric Power Company Member Depreciable Life Ranges - Generation Public Utilities, Property, Plant and Equipment, Generation, Useful Life Indemnification Indemnification Indemnification provided to acquirer of contracted competitive renewables cedar creek II wind fram. Total Aggregate Intrinsic Value of Nonvested Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Income Statement Income Statement [Abstract] Awarded Units Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Deferred Deferred Federal Income Tax Expense (Benefit) Rate Base [Member] Rate Base [Member] Rate Base Generation and Marketing [Member] Generation And Marketing [Member] Generation And Marketing [Member] Regulation Status [Axis] Regulation Status [Axis] AEP Transmission Holdco [Member] AEP Transmission Holdco [Member] AEP Transmission Holdco. Nuclear Trust Fund Investments Nuclear Trust Fund Investments [Text Block] Nuclear trust fund investments. WEIGHTED AVERAGE NUMBER OF DILUTED AEP COMMON SHARES OUTSTANDING Weighted Average Number of Diluted AEP Common Shares Outstanding Weighted Average Number of Shares Outstanding, Diluted Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Total MTM Derivative Contract Net Assets (Liabilities) Derivative Assets (Liabilities), at Fair Value, Net Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Jointly-owned Electric Facilities Schedule of Jointly Owned Utility Plants [Table Text Block] Commercial [Member] Commercial [Member] Retail revenues from the commercial class. Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Related Party Sales of Property Related Party Sales of Property [Text Block] Tabular disclosure of related party sales of property. Amount of Gain (Loss) Recognized on Risk Management Contracts Gain (Loss) on Derivative Instruments, Net, Pretax [Abstract] Fuel and Purchased Power Adjustment Rider [Member] Fuel and Purchased Power Adjustment Rider [Member] Fuel and Purchased Power Adjustment Rider Depreciable Life Ranges - Distribution Public Utilities, Property, Plant and Equipment, Distribution, Useful Life Stockholders Equity ASU 2016-13 Adoption Stockholders Equity ASU 2016-13 Adoption This element represents movements included in the statement of changes in stockholders' equity which are specifically related to the adoption of ASU 2016-13. Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Solar Generation MWs Solar Generation MWs Solar Generation MWs AEP Generating Co To Southwestern Electric Power Co [Member] AEP Generating Co To Southwestern Electric Power Co [Member] AEP Generating Co to Southwestern Electric Power Co. Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Portion Expected to be Reclassified to Net Income During the Next Twelve Months Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months Finance Lease, Right-of-Use Asset, after Accumulated Amortization [Domain] Finance Lease, Right-of-Use Asset, after Accumulated Amortization [Domain] Finance Lease, Right-of-Use Asset, after Accumulated Amortization [Domain] Loans Payable [Member] Loans Payable [Member] Net Income Attributable to Noncontrolling Interests Net Income (Loss) Attributable to Noncontrolling Interests Net Income (Loss) Attributable to Noncontrolling Interest Beginning Balance, Shares Ending Balance, Shares Common Stock, Shares, Issued Common Stock, Shares, Issued Total Mezzanine Equity Total Mezzanine Equity Total mezzanine equity balance. Money Pool Participant by Company Type 2 [Domain] Money Pool Participant by Company Type 2 [Domain] Money Pool Participant by Company Type 2 [Domain] Proceeds of Mineral Rights Sale [Axis] Proceeds of Mineral Rights Sale [Axis] Proceeds of Mineral Rights Sale Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Staff Recommended Adjustments to Companies Request Staff Recommended Adjustments to Companies Request The staff's recommended adjustments to the companies request. Amounts Included in AOCI, Income Tax Expense and Regulatory Assets Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] 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 Cash Flow Hedges [Member] Cash Flow Hedging [Member] Acquisitions of Nuclear Fuel Payments for Nuclear Fuel Obligations Under Finance Leases Finance Lease, Liability, Current Carrying Amount and Classification of Variable Interest in Accounts Payable Carrying Amount and Classification of Variable Interest in Accounts Payable [Text Block] The carrying amount and classification of variable interest in accounts payable. Net Cash Flows Used for Investing Activities Net Cash Provided by (Used in) Investing Activities Actuarial (Gain) Loss During the Year Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax Revolving Credit Facilities Credit Facilities, Total Credit Facilities Structured Amount of revolving credit facilities. 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] Federal Internal Revenue Service (IRS) [Member] Affiliated Companies Accounts Payable, Related Parties, Current Corporate and Other [Member] Corporate and Other [Member] Long- term Debt by Type of Debt and Maturity Long term Debt by Type of Debt and Maturity [Abstract] Long term Debt by Type of Debt and Maturity. Schedule of Segment Reporting Information, by Segment [Table Text Block] Reportable Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Reclassifications of KPCo Pension and OPEB Regulatory Assets, Tax Reclassifications to AOCI, Current Period, Net of Tax, Attributable to Parent, Tax Reclassifications to AOCI, Current Period, Net of Tax, Attributable to Parent, Tax Total Current Regulatory Assets [Member] Total Current Regulatory Assets [Member] Total Current Regulatory Assets Amortization of Pension and OPEB Deferred Costs, Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Entity Current Reporting Status Entity Current Reporting Status Percentage of Management Fee Received by SWEPCo from DHLC Percentage Of VIE Management Fee Received Percentage of management fee received by SWEPCo from DHLC. Construction Expenditures Included in Current Liabilities as of December 31, Construction in Progress Expenditures Incurred but Not yet Paid Construction in Progress Expenditures Incurred but Not yet Paid 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. Intervenor Recommended WACC Intervenor Recommended WACC Intervenor Recommended WACC Outstanding Long-term Debt Long-Term Debt, Fiscal Year Maturity [Abstract] Change in Short-term Debt with Original Maturities Less Than 90 Days, Net Proceeds from (Repayments of) Short-Term Debt, Maturing in Three Months or Less Payment Timing [Domain] Payment Timing [Domain] Payment Timing [Domain] 2028 - 2033 [Member] Maturity Period Nine [Member] 2028 - 2033 [Member] Federal Statutory Income Tax Rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Transmission [Member] Transmission [Member] Electric Transmission [Member] Intrinsic Value of Restricted Shares and Restricted Stock Units Vested Share-based Compensation Arrangement, By Share-based Payment Award, Equity Instruments Other Than Options Vested In Period Total Intrinsic Value The intrinsic monetary value of equity-based payment equity instruments, excluding stock (or unit) options, that vested during the reporting period as calculated by applying the disclosed pricing methodology. Operating Leases, Later Years Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five ALJ Recommended Disallowance ALJ Recommended Disallowance ALJ Recommended Disallowance Asset Retirement Obligations (ARO) Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Tax Reform Adjustments Tax Reform Adjustments The portion of the difference related to Federal Tax Reform Adjustments. 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. Cross Acceleration Provisions Maximum Third Party Obligation Amount Cross Acceleration Provisions Maximum Third Party Obligation Amount Cross Acceleration Provisions Maximum Third Party Obligation Amount Liabilities Liabilities [Abstract] TOTAL PROPERTY, PLANT AND EQUIPMENT - NET Total Property, Plant and Equipment, Net Net Investment Net Property, Plant and Equipment Property, Plant and Equipment, Net Purchased Power from OVEC Purchased Power from OVEC [Text Block] Tabular disclosure of purchased power from OVEC. Proceeds from Income Tax Refunds Proceeds from Income Tax Refunds Compensation Cost and Actual Tax Benefit Realized for the Tax Deductions from Compensation Cost for Share-based Payment Arrangements Compensation cost and actual tax benefit realized [Abstract] Compensation cost and actual tax benefit realized. Change in Other Noncurrent Assets Increase (Decrease) in Other Noncurrent Assets Property, Plant and Equipment, Net Public Utilities, Property, Plant and Equipment, Net Notes Payable, Other Payables [Member] Notes Payable, Other Payables [Member] Dividends Dividends Wholesale Generation [Member] Wholesale Generation [Member] Wholesale Generation. Regulatory Liabilities Currently Not Paying Return [Member] Regulatory Liabilities Currently Not Paying Return [Member] Regulatory Liabilities Currently Not Paying Return Member. Investment funds Investment funds [Member] Investment funds Variable Interest Entity Member Noncontrolling Interest in Variable Interest Entity Noncontrolling Interest in Variable Interest Entity Total Long-term Debt Outstanding Total Long-term Debt Outstanding Long-Term Debt Other Income Other Nonoperating Income (Expense) Gross Unrealized Losses Investment Owned, Unrecognized Unrealized Depreciation Year Ultimate Reached Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate Ohio Basic Transmission Cost Rider [Member] Ohio Basic Transmission Cost Rider [Member] Ohio Basic Transmission Cost Rider 2021 Approved ENEC Rate Increase 2021 Approved ENEC Rate Increase 2021 Approved ENEC Rate Increase Bad Debt Reserves Related to Securitized Sale of Accounts Receivable Bad Debt Reserves Related to Securitized Sale of Accounts Receivable A valuation allowance for securitized receivables that are expected to be uncollectible. Deferred Income Taxes [Member] Deferred Income Taxes [Member] Deferred Income Taxes. Accrued Taxes Taxes Payable, Current Equity Units [Domain] Equity Units [Domain] Equity Units Net Cash Paid (Received) for Income Taxes Income Taxes Income Taxes Paid, Net Measurement Basis [Axis] Measurement Basis [Axis] 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] Summary of Cash Payouts for Performance Units and Career Shares Summary Of Cash Payouts For Performance Units And Career Shares [Text Block] Tabular disclosure of cash payouts for performance units and career shares. Contract with Customer, Duration [Domain] Contract with Customer, Duration [Domain] Common Stock, Dividends, Per Share, Declared Common Stock, Dividends, Per Share, Declared Forward Equity Contract Payment Rate Forward Equity Contract Payment Rate Forward Equity Contract Payment Rate Red Rock Generating Facility [Member] Red Rock Generating Facility [Member] Red Rock Generating Facility Member. Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities Disaggregation of Revenue Disaggregation of Revenue [Abstract] Ohio Municipal Ohio Municipal [Member] Ohio Municipal [Member] Current Assets [Member] Current Assets [Member] Current Assets Contingent Financial Obligation for Mutual Insurance Contingent financial obligation for mutual insurance Contingent financial obligation for mutual insurance. Consolidated Assets and Liabilities of Variable Interest Entities us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract [Abstract] us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesAbstract Significant Customers Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Postemployment Benefits [Member] Postemployment Benefits [Member] Postemployment Benefits Santa Rita East [Member] Santa Rita East [Member] Santa Rita East Wind Farm. AEP owns a 75% interest in the farm. 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] Sales of Investment Securities Proceeds from Sale, Maturity and Collection of Investments Impact of Cash Flow Hedges on the Balance Sheet Impact of Cash Flow Hedges on Balance Sheet [Text Block] Tabular disclosure of the impact of cash flow hedges on the balance sheet. Total Federal Federal Income Tax Expense (Benefit), Continuing Operations Additional Revenues Recognized to be Surcharged to Customers Additional Revenues Recognized to be Surcharged to Customers Increase in revenues recognized to be surcharged to customers Insurance Protection for Public Liability Arising from a Nuclear Incident Insurance protection for public liability arising from nuclear incident Insurance protection for public liability arising from a nuclear incident. Plant Retirement Costs - Unrecovered Plant, Welsh Plant, Unit 2 [Member] Plant Retirement Costs - Unrecovered Plant, Welsh Plant, Unit 2 [Member] Plant Retirement Costs - Unrecovered Plant, Welsh Plant, Unit 2 Cross Default Provisions Maximum Third Party Obligation Amount Cross Default Provisions Maximum Third Party Obligation Amount Non-exchange traded commodity contracts containing cross-default provisions Dolet Hills Power Station Fuel Costs - Arkansas Dolet Hills Power Station Fuel Costs - Arkansas [Member] Dolet Hills Power Station Fuel Costs - Arkansas Estimated Present Value of Future Minimum Lease Payments on Operating Leases Operating Lease, Liability US Government Agencies Debt Securities [Member] US Government Agencies Debt Securities [Member] Stock-based Compensation Share-Based Payment Arrangement [Policy Text Block] Finance Leases, Total Future Minimum Lease Payments Finance Lease, Liability, to be Paid Finance Lease Liabilities Rolling Future Minimum Lease Payments Finance Lease, Liability, Fiscal Year Maturity [Table Text Block] Ultimate Defined Benefit Plan, Ultimate Health Care Cost Trend Rate Approved Carrying Charge Approved Carrying Charge Approved Carrying Charge on a Regulatory Asset Fixed Income Funds [Member] Fixed Income Funds [Member] Gain (Loss) on Fair Value Hedging Instruments Derivative, Gain (Loss) on Derivative, Net Net Increase in Pretax Income Due to Virginia SCC Order Net Increase in Pretax Income Due to Virginia SCC Order The net increase in pretax income due to Virginia SCC order in base case. Turk Generating Plant [Member] Turk Generating Plant [Member] Turk Generating Plant Member Benefit Payments Defined Benefit Plan, Plan Assets, Benefits Paid Approved Return on Common Equity for Prior Period Approved Return on Common Equity for Prior Period Percentage of public utility's approved return on equity for prior period. 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. Reduction in Recoverable Fuel Costs Reduction in Recoverable Fuel Costs Reduction in Recoverable Fuel Costs OTHER COMPREHENSIVE INCOME Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] 2022 Michigan Integrated Resource Plan Filing 2022 Michigan Integrated Resource Plan Filing [Member] 2022 Michigan Integrated Resource Plan Filing Electric Generation, Transmission and Distribution Revenues [Member] Electric Generation Transmission Distribution Revenues [Member] Electric Generation, Transmission and Distribution Revenues. Billings from VIE Billings From VIE Billings from VIE. Per Unit Conversion for Equity Units Per Unit Conversion for Equity Units The PAR value for each equity unit as issued Principal Amount, 2026 Long-Term Debt, Maturity, Year Four Hedging Relationship [Domain] Hedging Relationship [Domain] Auditor Location Auditor Location After 5 years Recorded Unconditional Purchase Obligation, to be Paid, after Year Five Health Care Trend Rates Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract] 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. Current Current Federal Tax Expense (Benefit) Jointly-owned Electric Facilities Jointly Owned Electric Facilities [Abstract] Jointly-owned Electric Facilities. Requested Weighted Average Cost of Capital Requested Weighted Average Cost of Capital Requested Weighted Average Cost of Capital Fair Value, Assets and Liabilities Measured on Recurring Basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Gross Unrealized Gains Available-for-Sale Securities, Gross Unrealized Gain Commitments and Contingencies Commitments and Contingencies Benefit Payment or Receipt by Type [Domain] Benefit Payment or Receipt by Type [Domain] [Domain] for Benefit Payment by Plan Type Non-Affiliate Contribution [Member] Non-Affiliate Contribution [Member] Non-affiliate contribution. Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool Maximum And Minimum Interest Rates For Funds Either Borrowed From Or Loaned To Utility Money Pool [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. Conesville Generating Station [Member] Conesville Generating Station [Member] Conesville Generating Station Securitized Debt for Receivables - AEP Credit Securitized Debt for Receivables Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount Service Cost Defined Benefit Plan, Service Cost Number of Shares Remaining Available for Issuance Under the AEP Long-Term Incentive Plan Common Stock, Capital Shares Reserved for Future Issuance Max Potential Loss on Master Lease Agreements Max Potential Loss on Master Lease Agreements Maximum potential loss on master lease agreements. Purchase Price Allocation of an Acquisition [Table Text Block] Purchase Price Allocation of an Acquisition [Table Text Block] Purchase Price Allocation of an Acquisition table Entity Voluntary Filers Entity Voluntary Filers Impairment Losses Goodwill, Impairment Loss 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. Loss on the Expected Sale of KPCo Loss on the Expected Sale of KPCo Loss on the Expected Sale of KPCo Restricted Stock Units and Performance Share Units [Member] Restricted Stock Units and Performance Share Units [Member] Obligations Under Operating Leases [Axis] Obligations Under Operating Leases [Axis] Obligations Under Operating Leases Weighted Average Discount Rate, Finance Leases Finance Lease, Weighted Average Discount Rate, Percent Revenue from Contracts with Customers Revenue from Contract with Customer [Text Block] Deferred State Income Taxes Deferred State Income Taxes Amount of deferred tax liability attributable to taxable temporary differences from state income taxes. 2022 Recommended Increase in ENEC Rates 2022 Recommended Increase in ENEC Rates 2022 Recommended Increase in ENEC Rates Change in Benefit Obligation Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] 2022 Recommended ENEC Under-Recovery Disallowance 2022 Recommended ENEC Under-Recovery Disallowance 2022 recommended under-recovery disallowance in ENEC from intervenors. Income Tax Reconciliation Nondeductible Expense Permanent Miscellaneous Income Tax Reconciliation Nondeductible Expense Permanent Miscellaneous Income Tax Reconciliation Nondeductible Expense Permanent Miscellaneous Indiana Michigan Power Co to Kentucky Power Co [Member] Indiana Michigan Power Co to Kentucky Power Co [Member] Indiana Michigan Power Co to Kentucky Power Co. Amortization of Net Actuarial Loss Defined Benefit Plan, Amortization of Gain (Loss) Discount Rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate TOTAL LIABILITIES AND EQUITY Total Liabilities and Equity Liabilities and Equity Other [Member] Portion at Other than Fair Value Measurement [Member] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Borrowings from Parent 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. Deferred Tax Assets Deferred Tax Assets, Gross Total Assets [Member] Total Assets [Member] Total Assets Billings for Services from Central Machine Shop Facility Billings for Services from Central Machine Shop Facility APCo operates the Central Machine Shop facility which repairs and rebuilds specialized components for the generation plants accross the AEP System. Equity Method Investments [Member] Equity Method Investments [Member] Ohio Power Co [Member] Ohio Power Co [Member] Ohio Power Company Member Imputed Interest on Operating Leases Lessee, Operating Lease, Liability, Undiscounted Excess Amount Sale of Stock [Domain] Sale of Stock [Domain] Proceeds from Sale of Property, Plant, and Equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from Sale of Property, Plant, and Equipment Vesting Period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Performance Units Voluntarily Deferred into the Incentive Compensation Deferral Program Share Based Compensation Performance Units Voluntarily Deferred into Incentive Compensation Deferral Program Performance Units Voluntarily Deferred into the Incentive Compensation Deferral Program. AEP Common Stock Schedule of Stock by Class [Table Text Block] 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. Guarantee Obligations Current Carrying Value Other Liabilities Noncurrent GuaranteeObligationsCurrentCarryingValueOtherLiabilitiesNoncurrent The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees under Other Noncurrent Liabilities. Restricted Net Assets Restricted Net Assets A segregation of retained earnings which is unavailable for dividend distribution. Transmission and Distribution Companies [Member] Transmission And Distribution Utilities [Member] Transmission And Distribution Companies [Member] Transmission And Distribution Companies [Member] Spent Nuclear Fuel and Decommissioning Trusts Nuclear Fuel and Decommissioning Trusts [Abstract] Nuclear Fuel and Decommissioning Trusts Abstract. Cook Nuclear Plant Refueling Outage Levelization [Member] Cook Nuclear Plant Refueling Outage Levelization [Member] Cook Nuclear Plant Refueling Outage Levelization Member. Balance at January 1, Balance at December 31, Unrecognized Tax Benefits Unrecognized Tax Benefits AEP Ownership in LLCs AEP Ownership in LLCs AEP's ownership in Desert Sky Wind Farm LLC and Trent Wind Farm LLC. Gain (Loss) on Disposition 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 [Member] AEP Texas Transition Funding and Restoration Funding [Member] AEP Texas Transition and Restoration Funding [Member] Mutual Funds Fixed Income [Member] Mutual Funds Fixed Income [Member] Mutual Funds Fixed Income Asset Impairments and Other Related Charges Other Asset Impairment Charges Other Asset Impairment Charges Payment at Closing Payment at Closing [Member] Payment at Closing Corporate Debt [Member] Corporate Debt Securities [Member] Corporate Debt Securities [Member] AEP Wind Holdings LLC [Member] AEP Wind Holdings LLC [Member] AEP Wind Holdings LLC [Member] Pledged Accounts Receivable - AEP Credit Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount Entity Address, Address Line One Entity Address, Address Line One Level 3 Quantitative Information Fair Value Measurement Inputs and Valuation Techniques [Abstract] Alternative Investments [Member] Alternative Investments [Member] Alternative Investments. Share of Net Investment in Dolet Hills Power Station Share of Net Investment in Dolet Hills Power Station SWEPCo's share of the net investment in Dolet Hills Power Station. Retail [Member] Retail [Member] Product and Service [Axis] Product and Service [Axis] Expected Return on Plan Assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Net Uncollectible Accounts Receivable Written Off Net Uncollectible Accounts Receivable Written Off Net uncollectible accounts receivable written off. Amounts Due from Customers for Future Federal Income Taxes Amounts Due from Customers for Future Federal 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. Nuclear Trust Fund Investments Nuclear Trust Fund Investments [Abstract] Nuclear trust fund investments. Customer Accounts Receivable Managed Portfolio Customer Accounts Receivable Managed Portfolio [Text Block] Customer accounts receivable managed portfolio. Deferred Tax Liabilities, Property, Plant and Equipment, Percentage Deferred Tax Liabilities, Property, Plant and Equipment, Percentage Deferred Tax Liabilities, Property, Plant and Equipment, Percentage, Related to the Tax Cuts and Jobs Act. Interest Expense Interest Expense Interest Expense Interest Expense Rockport Plant Dry Sorbent Injection System and Selective Catalytic Reduction [Member] Rockport Plant Dry Sorbent Injection System - Indiana [Member] Rockport Plant Dry Sorbent Injection System - Indiana [Member] Equity Method Investments Equity Method Investments [Policy Text Block] Types of Related Party Revenue [Axis] Types of Related Party Revenue [Axis] Interest Rate [Member] Interest Rate [Member] Interest Rate [Member] Interest Rate Member. Operating Lease Liability Deferred Tax Liabilities, Leasing Arrangements Performance Units and Reinvested Dividends [Member] Performance Units and Reinvested Dividends [Member] Perormance Units and Reinvested Dividends [Member] Functional Class of Property [Axis] Functional Class of Property [Axis] Functional Class of Property - including Generation, Transmission, Distribution and Other Variable Interest Entities [Member] Variable Interest Entities [Member] Variable Interest Entities Other Noncurrent Assets [Member] Other Noncurrent Assets [Member] Equity Method Investment, Other than Temporary Impairment Equity Method Investment, Other than Temporary Impairment Rockport Plant Litigation [Member] Rockport Plant Litigation [Member] Rockport Plant Litigation Impaired Long-Lived Assets Held and Used by Type [Axis] Impaired Long-Lived Assets Held and Used by Type [Axis] Redemption of Short-term Debt with Original Maturities Greater Than 90 Days Repayments of Short-Term Debt, Maturing in More than Three Months Disaggregated Revenues from Contracts with Customers Disaggregation of Revenue [Table Text Block] Deferred Tax Liabilities Deferred Tax Liabilities, Gross Revenue from Contract with Customers, Net of Provisions for Refund, Including Assessed Tax Revenue from Contract with Customers, Net of Provisions for Refund, Including Assessed Tax Revenue from Contract with Customers, Net of Provisions for Refund, Including Assessed Tax Finance Lease Assets [Member] Finance Lease Assets [Member] Finance Lease Assets. Amount Recovered in Rates for Decommissioning Costs Amount Recovered In Rates For Decommissioning Costs Amount recovered in rates for decommissioning costs. Weighted Average Interest Rate of Commercial Paper Outstanding During Year Debt Instrument, Interest Rate During Period Texas Transmission Cost Recovery Factor Texas Transmission Cost Recovery Factor [Member] Texas Transmission Cost Recovery Factor Affiliated Purchases Affiliated Purchases [Text Block] Tabular disclosure of affiliated purchases. Residential [Member] Residential [Member] Retail revenues from the residential class. Noncash Contribution of Radial Assets from Parent Noncash or Part Noncash Acquisition, Fixed Assets Acquired Domestic [Member] Domestic [Member] Domestic Member. Money Pool Participant by Company Type 2 [Axis] Money Pool Participant by Company Type 2 [Axis] Money Pool Participant by Company Type 2 Current Liabilities [Member] Current Liabilities [Member] Current Liabilities Number of Years After Termination of Board Service Participant Can Elect to Have Stock Units Paid in Cash Number of Years After Termination of Board Service Participant Can Elect to Have Stock Units Paid in Cash Number Of Years After Termination Of Board Service Participant Can Elect To Have Stock Units Paid In Cash Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Total Long-Term Debt Outstanding [Domain] Total Long-Term Debt Outstanding [Domain] Total Long-Term Debt Outstanding [Domain] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Excess ADIT and Excess Federal Income Taxes to Distribution Customers [Member] Excess ADIT and Excess Federal Income Taxes to Distribution Customers [Member] Excess ADIT and Excess Federal Income Taxes to Distribution Customers [Member] Income Taxes on Pretax Income at Statutory Rate (21%) Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Refund Item [Axis] Refund Item [Axis] Refund Item [Axis] Advances from Affiliates Due to Related Parties, Current Mining Area [Axis] Mining Area [Axis] Mining area. Ohio Enhanced Service Reliability Plan [Member] Enhanced Service Reliability Plan [Member] Enhanced Service Reliability Plan. Imputed Interest on Finance Leases Finance Lease, Liability, Undiscounted Excess Amount Securitized Transition Assets Deferred Tax Assets Liabilities Securitized Transition 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) and are expected to be recoverable through a transition charge after one year (or beyond the operating cycle if longer). Plant Retirement Costs - Unrecovered Plant, Arkansas [Member] Plant Retirement Costs - Unrecovered Plant, Arkansas [Member] Plant Retirement Costs - Unrecovered Plant, Arkansas Approved Net Increase in Texas Annual Revenues Approved Net Increase in Texas Annual Revenues Net Increase in approved Texas Annual Revenues Levelization of Nuclear Refueling Outage Costs Levelization Of Nuclear Refueling Outage Costs [Text Block] Policy for deferring incremental operating and maintenance costs during a refueling for amortization over the fuel burn cycle. Assets and Liabilities Held for Sale related to KPCo Assets and Liabilities Held for Sale related to KPCo Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. AEP Generation Resources [Member] AEP Generation Resources [Member] AEP Generation Resources [Member] Glen Lyn Station [Member] Glen Lyn Station [Member] Glen Lyn Station Proposed Settlement Annual Increase Following an Order Proposed Settlement Annual Increase following order Proposed Settlement Annual Increase following order Rockport Plant, Unit 2 Accelerated Depreciation for Leasehold Improvements [Member] Rockport Plant, Unit 2 Accelerated Depreciation for Leasehold Improvements [Member] Rockport Plant, Unit 2 Accelerated Depreciation for Leasehold Improvements Real Estate [Member] Defined Benefit Plan, Real Estate [Member] Approximate OVEC Generating Capacity (MWs) Utility Plant Generation Capacity Generating capacity of utility plants. Change in Other Noncurrent Liabilities Increase (Decrease) in Other Noncurrent Liabilities Increase (Decrease) in Other Noncurrent Liabilities Year 2 Finance Lease, Liability, Payments, Due in Rolling Year Two Regulated and Unregulated Operation [Domain] Regulated and Unregulated Operation [Domain] Principal Amount, Total Long-Term Debt, Gross Rockport U2 Leasehold Improvements Net Book Value Rockport U2 Leasehold Improvements Net Book Value Rockport U2 Leasehold Improvements Net Book Value Net Loans (Borrowings) to/from Money Pool Related Party Transaction, Due from (to) Related Party, Current Underfunded Accumulated Benefit Obligation Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block] Total Obligations Under Finance Leases Finance Lease, Liability Dividends Paid on Common Stock - Nonaffiliated Dividends Paid on Common Stock Payments of Ordinary Dividends, Common Stock Total Property, Plant and Equipment Property, Plant and Equipment, Gross, Period Increase (Decrease) Property, Plant and Equipment, Gross Reclassification Into Accumulated Other Comprehensive Income [Domain] Reclassification Into Accumulated Other Comprehensive Income [Domain] Reclassification Into Accumulated Other Comprehensive Income [Domain] 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. After 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value March 2026 [Member] March 2026 [Member] March 2026 ARO [Domain] ARO [Domain] ARO Related Party Purchases [Domain] Related Party Purchases [Domain] Related party purchases. Paid-in Capital Additional Paid in Capital Additional Paid in Capital Disposal Group, Including Discontinued Operation, Revenue Disposal Group, Including Discontinued Operation, Revenue Public Utility [Axis] Public Utility [Axis] Appalachian Power Co. to AEP Transmission Co [Member] Appalachian Power Co. to AEP Transmission Co [Member] Appalachian Power Co. to AEPTCo [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Assets and Liabilities Held for Sale [Axis] Assets and Liabilities Held for Sale [Axis] Assets and Liabilities Held for Sale Consolidated Income Taxes Before Extraordinary Item Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract] Mining Area [Domain] Mining Area [Domain] Mining area. Michigan Power Supply Cost Recovery Reconciliation Michigan Power Supply Cost Recovery Reconciliation [Member] Michigan Power Supply Cost Recovery Reconciliation Reportable Segment Information Segment Reporting Information, Profit (Loss) [Abstract] Proposed Settlement Annual Rate Increase Proposed Settlement Annual Rate Increase Proposed Settlement Annual Rate Increase Related Party Purchases of Property Related Party Purchases of Property [Text Block] Tabular disclosure of related party purchases of property. Year 5 Finance Lease, Liability, Payments, Due in Rolling Year Five Spent Nuclear Fuel [Member] Spent Nuclear Fuel Liability [Member] Spent Nuclear Fuel Liability Dividends Paid to Member Dividends Paid on Common Stock Payments of Distributions to Affiliates COVID-19 - Virginia [Member] COVID-19 - Virginia [Member] COVID-19 - Virginia Equity Component [Domain] Equity Component [Domain] Reclassifications from Accumulated Other Comprehensive Income (Loss) Reclassifications From Accumulated Other Comprehensive Income [Abstract] Subsequent Event Type [Domain] Subsequent Event Type [Domain] 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). 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. Increase - Tax Positions Taken During the Current Year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Finance Lease Right-of-Use Asset Amortization Finance Lease, Right-of-Use Asset, Amortization Reconciliation of Federal Statutory Rate and Amount of Taxes Reported Effective Income Tax Rate Reconciliation, Percent [Abstract] Ohio Valley Electric Corporation [Member] Ohio Valley Electric Corporation [Member] Ohio Valley Electric Corporation Requested Return on Equity Requested Return on Equity Requested return on equity. Additional Settlement Liability if Cross Default Provision is Triggered Assets Needed for Immediate Settlement, Aggregate Fair Value Fair Value of Plan Assets as of January 1 Fair Value of Plan Assets as of December 31 Asset Class Fair Value of Plan Assets Defined Benefit Plan, Plan Assets, Amount Disallowed Item in Commission Order Disallowed Item in Commission Order An item that is disallowed in a commission order. 2023-2024 [Member] 2-3 Years [Member] Time period in which fixed performance obligations will be satisfied. Liabilities Assumed with Sempra Renewable LLC and Santa Rita East Acquisition Noncash or Part Noncash Acquisition, Value of Liabilities Assumed Noncash or Part Noncash Acquisition, Value of Liabilities Assumed Cook Plant Turbine [Member] Cook Plant Turbine [Member] Cook Plant Turbine [Member] TOTAL NONCURRENT LIABILITIES Noncurrent Liabilities Liabilities, Noncurrent Dividend Restrictions 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. Transfers into Level 3 Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] Net Amounts of Assets Liabilities Presented in Statement of Financial Position [Member] Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position. Award Type [Axis] Award Type [Axis] Decrease - Settlements with Taxing Authorities Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities 2020 Texas Fuel Reconciliation 2020 Texas Fuel Reconciliation [Member] 2020 Texas Fuel Reconciliation Dolet Hills Lignite Co, LLC [Member] Dolet Hills Lignite Co, LLC [Member] Dolet Hills Lignite Co, LLC Variable Interest Entity Member Total Investment [Member] Total Investment [Member] Total Investment Employee Benefits and Pension Obligations Employee Benefits and Pension Obligations 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. Other Regulatory Assets Pending Final Regulatory Approval [Member] Other Regulatory Assets Not Yet Being Recovered [Member] Other Regulatory Assets Not Yet Being Recovered 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 Other Temporary Investments Other Short-Term Investments Proceeds of Mineral Rights Sale [Domain] Proceeds of Mineral Rights Sale [Domain] Proceeds of Mineral Rights Sale [Domain] Cleco Power, LLC [Member] Cleco Power, LLC [Member] Cleco Power LLC Member TOTAL LIABILITIES Liabilities Nuclear Trust Funds Trust Assets For Decommissioning And Spent Nuclear Fuel Disposal (Policy) [Text Block] Element used to describe policy for trust assets for decommissioning and spent nuclear fuel disposal. Proceeds from Sales of Assets Proceeds from Sale of Productive Assets Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Revised Requested Annual Increase Revised Requested Annual Increase Revised Requested Annual Increase Regulated Generating Unit to be Retired Regulated Generating Unit to be Retired [Abstract] Regulated Generating Unit to be Retired [Abstract] Benefit Costs [Member] Benefit Costs [Member] Benefit Costs Member Prior Service (Credit) Cost Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Risks and Uncertainties Risks and Uncertainties [Abstract] Rockport Generating Plant (Unit No. 2) [Member] Rockport Generating Plant (Unit No. 2) [Member] 2016 Texas Base Rate Case [Member] 2016 Texas Base Rate Case [Member] 2016 Texas Base Rate Case [Member] Assets, Fair Value Disclosure Assets, Fair Value Disclosure [Abstract] Nonvested, Weighted Average Grant Date Fair Value, Beginning of Period Nonvested, Weighted Average Grant Date Fair Value, End of Period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Deferred Income Taxes Deferred Income Taxes Deferred Income Tax Expense (Benefit) Virginia Transmission Rate Adjustment Clause [Member] Virginia Transmission Rate Adjustment Clause [Member] Virginia Transmission Rate Adjustment Clause Employee Benefits and Pension Assets - Prepaid Benefit Costs Assets for Plan Benefits, Defined Benefit Plan Performance Score by HR Committee, Higher Range Performance score by hr Committee higher range Performance score by HR Committee,higher range. Commercially Available Insurance Commercially available insurance Commercially available insurance. Other Temporary Investments Short-Term Investments [Abstract] Securitized Assets Securitized Assets Securitized Regulatory Transition Assets, Noncurrent Proceeds from Sale of Receivables to AEP Credit Proceeds from Sale of Finance Receivables Total Propery, Plant and Equipment - Net [Axis] Total Propery, Plant and Equipment - Net [Axis] Total Propery, Plant and Equipment - Net Deferred Gain on Sale of Rockport Unit 2 [Member] Deferred Gain on Sale of Rockport Unit 2 [Member] Deferred Gain on Sale of Rockport Unit 2 [Member] Other Investments [Member] Other Investments [Member] Other Investments [Member] Anticipated After Tax Loss Range Upper Anticipated After Tax Loss Range Upper Anticipated After Tax Loss Range Upper 364-Day Term Loan Member 364-Day Term Loan Member [Member] 364-Day Term Loan Member Rates and Service Regulation Regulated Jurisdictions [Policy Text Block] Identifies the regulatory jurisdictions in which the entity operates and the primary regulator. Debt Disclosure [Abstract] Debt Disclosure [Abstract] Oklaunion PPA between AEP Texas and AEPEP Oklaunion PPA between AEP Texas and AEPEP [Abstract] Oklaunion PPA between AEP Texas and AEPEP [Abstract] Rockport Generating Plant Rockport Generating Plant [Member] Rockport Generating Plant Company Contributions Defined Benefit Plan, Plan Assets, Contributions by Employer Settlements Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases, Sales, Issues, Settlements SPP Transmission Service Charges SPP Transmission Service Charges [Text Block] Tabular disclosure of SPP Net Transmission Service Charges. Stock Issued During Period, Shares, Reverse Stock Splits Stock Issued During Period, Shares, Reverse Stock Splits Amounts Attributable to AEP Common Shareholders Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Net Cash Flows from Financing Activities Net Cash Provided by (Used in) Financing Activities Equity Stockholders' Equity Attributable to Parent [Abstract] Prepayments and Other Current Assets Prepaid Expense and Other Assets, Current Conesville Generating Station (Unit No. 4) [Member] Conesville Generating Station (Unit No. 4) [Member] Conesville Generating Station (Unit No. 4) Member Interest Cost Defined Benefit Plan, Interest Cost Fair Value of Derivative Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Sales and Purchases of Property Sales and Purchases of Property [Abstract] Sales and purchases of property with affiliates. Book Values and Fair Values of Long-term Debt Fair Value, by Balance Sheet Grouping [Table Text Block] Oklaunion Purchase Power Agreement Oklaunion Purchase Power Agreement - Current AEP Texas has partial ownership in the Oklaunion Plant which is operated by PSO but has leased its entire portion of the output of the plant to a non-utility affiliate. This is the current liability portion of the lease. Derivative Contract [Domain] Derivative Contract [Domain] Basis of Accounting Basis of Accounting [Text Block] Entity Registrant Name Entity Registrant Name 2025 Defined Benefit Plan, Expected Future Benefit Payment, Year Four Nonqualified Pension Plans [Member] Nonqualified Plan [Member] Subsequent Events Subsequent Events [Text Block] Maintenance Expense [Member] Maintenance Expense [Member] Maintenance expense. Regulatory Liabilities [Axis] Regulatory Liabilities [Axis] Regulatory Liabilities Axis. Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Basis Point RTO Incentive Basis Point RTO Incentive Basis Point RTO Incentive Benefit Payments Defined Benefit Plan, Benefit Obligation, Benefits Paid Staff Recommended Debt Capital Structure Staff Recommended Debt Capital Structure Staff Recommended Debt Capital Structure Regulatory Assets [Member] Regulatory Assets [Member] Regulatory Assets. February 2021 Severe Storm Fuel Costs February 2021 Severe Storm Fuel Costs [Member] February 2021 Severe Storm Fuel Costs Auction Sales to OPCo [Member] Auction Sales To OPCo [Member] Auction Sales to OPCo. Benefit Plans Retirement Benefits [Text Block] Operating Lease Assets [Member] Operating Lease Assets [Member] Operating Lease Assets Regulated Status [Axis] Regulated Status [Axis] Regulated Status Axis Investments Held in Trust for Future Liabilities Defined Benefit Plan Investment Policies And Strategies Narrative Description [Text Block] A narrative description of investment policies and strategies, including target allocation percentages or range of percentages considering the major categories of plan assets as of the latest statement of financial position presented (on a weighted-average basis for employers with more than one plan), and other factors that are pertinent to an understanding of those policies and strategies such as investment goals, risk management practices, allowable and prohibited investment types including the use of derivatives, diversification, and the relationship between plan assets and benefit obligations. For investment funds disclosed as major categories, the narrative description shall include a description of the significant investment strategies of those funds. Leases [Abstract] Leases [Abstract] Supplementary Information Supplementary Information [Text Block] Supplementary Information. Beginning Balance Ending Balance TOTAL EQUITY Equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest SWEPCo's Investment In DHLC SWEPCo's Investment In DHLC [Table Text Block] SWEPCo's investment in DHLC. Net Operating Loss Carryforward Deferred Tax Assets, Operating Loss Carryforwards Principles of Consolidation Consolidation, Policy [Policy Text Block] Cost of Decommissioning and Disposal of Radioactive Waste Cost of decommissioning and disposal of radioactive waste Cost of decommissioning and disposal of radioactive waste. Minimum [Member] Low [Member] Minimum [Member] Related Party Revenue [Domain] Related Party Revenue [Domain] Entity Emerging Growth Company Entity Emerging Growth Company Weighted-average Period of Unrecognized Compensation Costs (in years) Weighted-average Recognization Period for Unrecognized Compensation Costs Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans. Common Stock, Par Value Per Share Common Stock, Par or Stated Value Per Share Vertically Integrated Utilities [Member] Vertically Integrated Utilities [Member] Vertically Integrated Utilities [Member] Rate Matters 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. Benefit Obligations [Member] Benefit Obligations [Member] Benefit Obligations Member Billings from AEP Generating Company [Member] Billings from AEP Generating Company [Member] Billings from AEP Generating Company variable interest entity member. Investment, Name [Axis] Investment, Name [Axis] Fair Value Measurements Fair Value Disclosures [Text Block] Entity File Number Entity File Number Other Temporary Investments Other Temporary Investments Policy [Text Block] Policy for Other Temporary Investments Amortization (Deferral) of Incremental Nuclear Refueling Outage Expenses, Net Deferral of Incremental Nuclear Refueling Outage Expenses, Net The net cash inflow or outflow due to Cook Unit 1 & 2 refueling outage levelization. 2022 Oklahoma Base Rate Case [Member] 2022 Oklahoma Base Rate Case [Member] 2022 Oklahoma Base Rate Case Mitchell Power Plant Mitchell Power Plant [Member] Mitchell Power Plant Accrued Interest Interest Payable, Current Total Comprehensive Income Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Operating Lease Assets [Axis] operating lease assets [Axis] Operating lease assets Derivatives and Hedging Derivatives, Policy [Policy Text Block] Awarded Units Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Effective Income Tax Rate Effective Income Tax Rate Reconciliation, Percent Kentucky Power Co to AEP Transmission Co [Member] Kentucky Power Co to AEP Transmission Co [Member] Kentucky Power Co to AEP Transmission Co [Member] State Net Income Tax Operating Loss Carryforwards Summary of Operating Loss Carryforwards [Table Text Block] Generation and Marketing Revenues [Member] Generation and Marketing Revenues [Member] Generation and Marketing Revenues. Accounts Payable Increase (Decrease) in Accounts Payable Fuel Inventory, Raw Materials, Gross Other Revenues - Affiliated Ohio Valley Electric Corporation - Barging and Other Transportation Services (43.47% Owned) Related Party Transaction, Other Revenues from Transactions with Related Party Projected Plan Obligations, Plan Assets and Funded Status us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract [Abstract] us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract Public Service Co Of Oklahoma [Member] Public Service Co Of Oklahoma [Member] Public Service Company Of Oklahoma Member Income Taxes Income Tax Disclosure [Text Block] Sales to AEP Affiliates Affiliated Revenues Revenue from Related Parties Revenue from Related Parties Contractual Maturities, Fair Value of Debt Securities Debt Securities, Held-to-Maturity, Fair Value, Maturity [Abstract] Cash and Cash Equivalents [Member] Defined Benefit Plan, Cash and Cash Equivalents [Member] Ohio Distribution Decoupling [Member] Distribution Decoupling [Member] Ohio Distribution Decoupling. Significant Unobservable Inputs for Level 3 Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block] Target Asset Allocations Target asset allocations [Text Block] Target asset allocations for assets in the benefits trusts. Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Disposal Group, Including Discontinued Operation, Liabilities Disposal Group, Including Discontinued Operation, Liabilities Plant Retirement Costs - Unrecovered Plant, Texas [Member] Plant Retirement Costs - Unrecovered Plant, Texas [Member] Plant Retirement Costs - Unrecovered Plant, Texas Maximum Potential Lease Payments, AEPRO Barge and Boat Leases Maximum Potential Lease Payments, AEPRO Barge and Boat Leases Future potential lease obligations under guaranteed AEPRO boat and barge leases. Share Based Compensation Performance Units to be Settled in Shares Share Based Compensation Performance Units to be Settled in Shares Share Based Compensation Performance Units to be Settled in Shares Direct Sales to West Affiliates [Member] Direct Sales to West Affiliates [Member] Direct Sales to West Affiliates. 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. Cook Plant Study Costs - Indiana [Member] Cook Plant Study Costs - Indiana [Member] Cook Plant Study Costs - Indiana Changes in Certain Components of Working Capital: Increase (Decrease) in Operating Capital [Abstract] Maximum Potential Loss Maximum Potential Loss [Abstract] Maximum potential loss. Cedar Creek Project Cedar Creek Project [Member] Cedar Creek Project Expected Retirement Date Disposal Group, Including Discontinued Operation, Description and Timing of Disposal Proceeds From Investment Sales Proceeds from Sale of Short-Term Investments Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Regulatory Liabilities Approved for Payment [Member] Regulatory Liabilities Being Paid [Member] Regulatory Liabilities Being Paid Member. Spent Nuclear Fuel and Decommissioning Trusts [Member] Spent Nuclear Fuel and Decommissioning Trusts [Member] Spent Nuclear Fuel and Decommissioning Trusts. Property Taxes Amortization of Deferred Property Taxes Amortization of Deferred Property Taxes AEP Share Of ETT Cumulative Revenues Subject To Review AEP Share Of ETT Cumulative Revenues Subject To Review AEP's share of ETT's cumulative revenues, subject to review, based upon interim rate increases received from 2009 through 2015. 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. Income Taxes and Investment Tax Credits Income Tax Policy Income Tax, Policy [Policy Text Block] Fair Values of Long-term Debt Book Values And Fair Values Of Long Term Debt Policy [Text Block] Policy for determining fair value of long-term debt. Alternative and Other [Member] Alternative and Other [Member] Alternative and Other [Member] Charitable Contribution to AEP Foundation [Abstract] Charitable Contribution to AEP Foundation [Abstract] Charitable Contribution to AEP Foundation [Abstract] Due Date Debt Instrument, Maturity Date 1 Date when the debt instrument is scheduled to be fully repaid, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.). Transition and Restoration Charges [Member] Transition and Restoration Charges [Member] Transition and Restoration Charges OVEC Purchased Power [Member] OVEC Purchased Power [Member] OVEC Purchased Power Retained Earnings Retained Earnings (Accumulated Deficit) Historical Investment Balance Historical Investment Balance Historical Investment Balance used in purchase price accounting. Maturity Of Net Fair Value Of Risk Management Contracts Prior to Cash Collateral, Assets/Liabilities 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. Settlements Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Year End Allocation Pension and Other Postretirement Plans Assets Percentage [Abstract] Pension and Other Postretirement Plans' Assets Percentage. Impaired Long-Lived Assets Held and Used, Asset Name [Domain] Impaired Long-Lived Assets Held and Used, Asset Name [Domain] Scenario [Domain] Scenario [Domain] Payments for Removal Costs Payments for Removal Costs Related Party Transactions Related Party Transactions Disclosure [Text Block] Cash Flow Hedges, Tax Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Maximum Percentage Debt to Capitalization Maximum Percentage Debt to Capitalization Maximum level of debt to capitalization persuant to credit agreement leverage restrictions. Maverick [Member] Maverick [Member] Maverick Sabine Mining Co [Member] Sabine Mining Co [Member] Sabine Mining Company Variable Interest Entity Member Proposed Previously Incurred Costs Expected to Recover Proposed Previously Incurred Costs Expected to Recover Proposed regulatory asset for previously incurred costs expected to recover Document Fiscal Year Focus Document Fiscal Year Focus Fair Value Assets And Liabilities Measured On Recurring Basis Fair Value Assets And Liabilities Measured On Recurring Basis (Policy) [Text Block] Element describes policy for fair value assets and liabilities measured on recurring basis. Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] 2023 [Member] Maturity Period Two [Member] Reconciling Adjustments [Member] Consolidation Eliminations [Member] Consolidation, Eliminations [Member] Depreciation, Depletion and Amortization - Unregulated Depreciation, Depletion and Amortization - Unregulated [Table Text Block] Unregulated depreciation, depletion and amortization. Transmission Property, Plant and Equipment, Transmission Public Utilities, Property, Plant and Equipment, Transmission Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Minimum Percentage of Equity AEP Provides Minimum Percentage of Equity AEP Provides The minimum percentage of equity AEP Parent provides to AEP Credit. 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. Maintenance Maintenance Cost, Policy [Policy Text Block] Approved Annual Revenue Increase Approved Annual Revenue Increase Amount of approved annual revenue increase. Members' Capital Members' Capital Actuarial Assumption Financial Statement Effect [Axis] Actuarial Assumption Financial Statement Effect [Axis] Actuarial Assumption Financial Statement Effect. Total Commitment From Bank Conduits To Finance Receivables Total Commitment From Bank Conduits To Finance Receivables Total commitment from bank conduits to finance receivables. Accounts Receivable and Accrued Unbilled Revenues Accounts and Financing Receivables, Held-for-Sale Staff Recommended Annual Rate Decrease Staff Recommended Annual Rate Decrease The staff's recommended annual rate decrease. Fuel, Materials and Supplies Increase (Decrease) in Inventories Short-term Contract with Customer [Member] Short-Term Contract with Customer [Member] Equity Units Issued Equity Units Issued The amount of AEP Equity Units Issued in connection with the March 2019 issuance of Junior Subordinated Notes. Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Adjusted Requested Annual Increase Adjusted Requested Annual Increase Adjusted annual increase request due to various factors such as true up of historical information. Certified Performance Scores and Units Earned Certified Performance Scores And Units Earned [Abstract] Certified Performance Scores and Units Earned. Coverage for Property Damage, Decommissioning and Decontamination for a Nonnuclear Incident Nonnuclear incident coverage for property damage decommissioning and decontamination Insurance coverage for property damage, decommissioning and decontamination for a nonnuclear incident. Plant in Service [Member] Plant in Service [Member] Plant in Service Goodwill Goodwill Goodwill 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. Treasury Stock, Shares Treasury Stock, Shares, Beginning Balance Treasury Stock, Shares, Ending Balance Treasury Stock, Shares Notes Payable Notes Payable Equity Units [Axis] Equity Units [Axis] AEP Equity Units. Corporate units issued by AEP that settle in AEP stock. Income Tax Expense/Benefit Income Tax (Expense) Benefit Income Tax Expense (Benefit) Valuation Allowance Deferred Tax Assets, Valuation Allowance Entity Public Float Entity Public Float Balance Sheet Location [Domain] Balance Sheet Location [Domain] Finance Leases, Later Years Finance Lease, Liability, Payments, Due in Rolling after Year Five Cost of Goods and Services Sold Purchased Electricity for Resale Cost of Goods and Services Sold Gross Unrealized Gains Investment Owned, Unrecognized Unrealized Appreciation Kentucky Deferred Purchase Power Expenses [Member] Kentucky Deferred Purchase Power Expenses [Member] Kentucky Deferred Purchase Power Expenses [Member] Estimated PreTax Income Reduction Estimated PreTax Income Reduction Estimated PreTax Income Reduction June 2022 Storm Costs June 2022 Storm Costs [Member] June 2022 Storm Costs Accounts Receivable [Member] Accounts Receivable [Member] Proceeds on Sale of Receivables to AEP Credit Proceeds on Sale of Receivables to AEP Credit [Abstract] Noncash Distribution of Radial Assets to Member Other Significant Noncash Transaction, Value of Consideration Given Cook Coal Terminal Cook Coal Terminal and SWEPCo Railcar Facility [Abstract] Cook Coal Terminal and SWEPCo Railcar Facility. Estimated ELG Costs Estimated ELG Costs Estimated ELG Costs Term Loan 4 Term Loan 4 [Member] Term Loan 4 PJM Transmission Service Charges PJM Transmission Service Charges [Text Block] Tabular disclosure of PJM Net Transmission Service Charges. Common Stock Common Stock, Value, Issued Cash Payouts Cash Payouts [Abstract] Cash Payouts. Related Party Charitable Contribuions to AEP Foundation Related Party Charitable Contribuions to AEP Foundation Related Party Charitable Contribuions to AEP Foundation Derivatives and Hedging (Textuals) Derivatives and Hedging Textuals [Abstract] Derivatives and Hedging Textuals ETT Interim Transmission Rates [Member] ETT Interim Transmission Rates [Member] ETT Interim Transmission Rates [Member] Other Current Liabilities - Accrued Short-term Benefit Liability Liability, Defined Benefit Plan, Current Fees Paid to AEP Credit for Customer Accounts Receivable Sold Fees Paid to AEP Credit for Customer Accounts Receivable Sold [Abstract] Gross Realized Gains on Investment Sales Available-for-Sale Securities, Gross Realized Gains Carrying Amount in AEP Service Corporation's Accounts Payable [Member] Carrying Amount in AEP Service Corporation's Accounts Payable [Member] Carrying amount in AEP Service Corporation's accounts payable member Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset Establishment of Regulatory Asset 2017-2019 Virginia Triennial Review Establishment of Regulatory Asset Racine Hydroelectric Plant [Member] Racine Hydroelectric Plant [Member] Racine Hydroelectric Plant [Member] Reclassification Into Accumulated Other Comprehensive Income [Axis] Reclassification Into Accumulated Other Comprehensive Income [Axis] Reclassification Into Accumulated Other Comprehensive Income Allowance for Borrowed Funds Used During Construction Allowance for Funds Used During Construction, Capitalized Interest Interest Expense on Finance Leases Finance Lease, Interest Expense Decommissioning Trust Assets Amount Decommissioning Fund Investments, Fair Value Money Pool Participant by Company Type [Domain] Money Pool Participant by Company Type [Domain] Money Pool Participant by Company Type. Nonutility [Member] Nonutility [Member] Nonutility Company. TOTAL OTHER COMPREHENSIVE INCOME (LOSS) Other Comprehensive Income (Loss) Net Current Period Other Comprehensive Income (Loss) Other Comprehensive Income (Loss), Net of Tax Joint License Agreement Joint License Agreement [Abstract] Joint License Agreement [Abstract] Transfers out of Level 3 Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3 Advanced Metering System [Member] Over-Recovery of Costs Related to Advanced Metering [Member] Over-Recovery of Costs Related to Advanced Metering [Member] Sale and Leaseback Transaction, Gain (Loss), Net Sale and Leaseback Transaction, Gain (Loss), Net Previously Incurred Costs Deferral Below Authorized ROE Band Previously Incurred Costs Deferral Below Authorized ROE Band Deferred previously incurred costs estimate that will earn below authorized ROE band. Transmission Service Charges Transmission Agreement [Abstract] Table format showing net charges of Transmission Agreement. FAC Credit to Customers FAC Credit to Customers FAC Credit to Customers Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Comprehensive Income [Abstract] Comprehensive Income [Abstract] Accrued Taxes, Net Increase (Decrease) in Accrued Taxes Payable Deferred Charges and Other Noncurrent Assets - Prepaid Benefit Costs Other Assets, Noncurrent Reduction in Fuel Costs Reduction in Fuel Costs Reduction in Fuel Costs Goodwill and Intangible Assets, Policy Goodwill and Intangible Assets, Policy [Policy Text Block] CCR/ELG Filings CCR/ELG Filings [Member] CCR/ELG Filings Payments for (Proceeds from) Removal Costs Payments for (Proceeds from) Removal Costs Commitment From Bank Conduits to Finance Receivables (One) [Domain] Commitment From Bank Conduits to Finance Receivables Commitment From Bank Conduits to Finance Receivables Capital Investments [Member] Capital Investments [Member] Capital Investments [Member] Central Machine Shop Central Machine Shop [Text Block] Tabular disclosure of Central Machine Shop billings from APCo. 2021 Cumulative ENEC Under Recovery 2021 Cumulative ENEC Under Recovery 2021 Cumulative ENEC Under Recovery Commodity [Member] Commodity Contract [Member] North Central Wind Energy Facilities [Domain] North Central Wind Energy Facilities [Domain] North Central Wind Energy Facilities Staff Recommended Equity Capital Structure Staff Recommended Equity Capital Structure Staff Recommended Equity Capital Structure Fair Value Significant Unobservable Input Price Per Unit Fair Value Significant Unobservable Input Price Per Unit Price per unit of significant unobservable inputs, such as but not limited to fair value for financial transmission rights agreements and energy contracts. Trust Assets [Domain] Trust Assets [Domain] [Domain] for Trust Assets [Axis] 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. Vegetation Management Program - West Virginia [Member] Vegetation Management Program - West Virginia [Member] Vegetation Management Program - West Virginia Noncash Acquisition Under Finance Leases Lease Obligation Incurred Summary of Performance Scores and Performance Units Earned Summary Of Performance Scores And Performance Units Earned [Text Block] Tabular disclosure of performance scores and performance units earned, deferred and paid. Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool Average Interest Rates For Funds Borrowed From And Loaned To Utility Money Pool [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. Benefit Payments [Member] Benefit Payments [Member] Benefit Payments. Requested Equity Capital Structure Requested Equity Capital Structure Requested Equity Capital Structure Retirement of Long-term Debt Repayments of Long-term Debt Repayments of Long-Term Debt Actuarial Assumptions for Benefit Obligations Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits Money Pool Participants Money Pool Activity And Authorized Borrowing Limits [Abstract] Money Pool Participants Money Pool Activity And Authorized Borrowing Limits [Abstract] Amortization of Pension and OPEB Deferred Costs, Net of Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Total Future Minimum Lease Payments Minimum Lease Payments, Sale Leaseback Transactions Dolet Hills Power Station [Member] Dolet Hills Power Station [Member] Dolet Hills Power Station Allowance for Uncollectible Accounts Accounts Receivable, Allowance for Credit Loss, Current Sempra Renewables LLC and Santa Rita East Acquisition [Member] Sempra Renewables LLC and Santa Rita East Acquisition [Member] Sempra Renewables LLC and Santa Rita East Acquisition Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Construction Expenditures Payments for Construction in Process TOTAL EXPENSES TOTAL EXPENSES Operating Expenses Pirkey Power Plant Pirkey Power Plant [Member] Pirkey Power Plant Maximum [Member] High [Member] Maximum [Member] Dry Lake Solar Project [Member] Dry Lake Solar Project [Member] Dry Lake Solar Project Underfunded Status, Projected Benefit Obligation Underfunded Status, Projected Benefit Obligation The funded status is measured as the difference between the fair value of plan assets and the projected benefit obligation. Cash Collateral Paid Netted Against Risk Management Liabilities Obligation to Return Securities Received as Collateral Inventory [Domain] Inventory [Domain] Welsh Plant Unit 2 Welsh Plant Unit 2 [Member] Welsh Plant Unit 2 Other Retail [Member] 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. Other Property, Plant and Equipment Property, Plant and Equipment, Other Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment Year 1 Lessee, Operating Lease, Liability, Payments, Due Next Rolling 12 Months Regulatory Liabilities Currently Paying a Return [Member] Regulatory Liabilities Currently Paying Return [Member] Regulatory Liabilities Currently Paying Return Member. Dividend Payment Restrictions Dividend Payment Restrictions [Text Block] Net Book Value of Radial Assets [Member] Net Book Value of Radial Assets [Member] Net Book Value of Radial Assets Flint Creek Generating Station (Unit No. 1) [Member] Flint Creek Generating Station (Unit No. 1) [Member] Flint Creek Generating Station (Unit No. 1) Member Components of Net Periodic Benefit Cost Schedule of Net Benefit Costs [Table Text Block] Status of Nonvested Performance Units Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block] Assets and Liabilities Held for Sale [Table Text Block] Assets and Liabilities Held for Sale [Table Text Block] Assets and Liabilities Held for Sale Proceeds for KY Operations Proceeds for KY Operations [Member] Proceeds for KY Operations Dolet Hills Generating Station and Related Fuel Operations Dolet Hills Power Station and Related Fuel Operations [Member] Dolet Hills Power Station and Related Fuel Operations Status of Nonvested Restricted Shares and Restricted Stock Units Status of nonvested restricted shares and RSUs [Abstract] Status of nonvested restricted shares and RSUs. Total Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage Other Long-term Debt Other Long-Term Debt Medicare Subsidy [Member] Statement Of Financial Accounting Standards 106 Medicare Subsidy [Member] Maximum Amount of Commercial Paper Outstanding Short-Term Debt, Maximum Amount Outstanding During Period Forward Equity Purchase Contract Date Forward Equity Purchase Contract Date Forward Equity Purchase Contract Date Texas Texas [Member] Texas Jurisdiction LOUISIANA [Domain] LOUISIANA [Domain] LOUISIANA Title of 12(b) Security Title of 12(b) Security Other Revenues [Member] Other Revenues - Affiliated and Nonaffiliated [Member] Other Revenues - Affiliated and Nonaffiliated. Reclassifications to AOCI, Current Period, before Tax, Attributable to Parent Reclassifications to AOCI, Current Period, before Tax, Attributable to Parent Reclassifications to AOCI, Current Period, before Tax, Attributable to Parent Fixed Income [Member] Fixed Income Securities [Member] Approved Annual Revenue Decrease Approved Annual Revenue Decrease Amount of approved annual revenue decrease. Purchases of Investments Payments to Acquire Available-for-Sale Securities Actuarial Assumptions Defined Benefit Plan, Assumptions [Table Text Block] Business Segments Segment Reporting Disclosure [Text Block] Commitments Contingencies and Guarantees [Text Block] Commitments, Guarantees and Contingencies Commitments Contingencies and Guarantees [Text Block] Qualified Pension Plans [Member] Qualified Pension Plans [Member] Qualified Pension Plans. Depreciation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation, Amount Disallowance Item [Axis] Disallowance Item [Axis] Disallowance Item [Axis] Affiliated Long Term Debt Current Affiliated Long Term Debt Current Total of the portions of the affiliated carrying amounts as of the balance sheet date of long-term debt, which may include notes payable, bonds payable, debentures, mortgage loans, and commercial paper, which are scheduled to be repaid within one year or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. Net Over-Recovered Fuel Costs Net Over-Recovered Fuel Costs Net Over-Recovered Fuel Costs Maximum Potential Loss Max Potential Loss on Master Lease Agreements [Table Text Block] Max potential loss on master lease agreements. Amount Collected, Rider Mine Close Other Assets Noncurrent Amount Collected, Rider Mine Close Other Assets Noncurrent Amount collected through a rider for final mine closure and reclamation costs recorded in deferred charges and other noncurrent assets. Acquisition Noncash or Part Noncash Acquisition, Other Assets Acquired Noncash or Part Noncash Acquisition, Other Assets Acquired Requested Debt Capital Structure Requested Debt Capital Structure Requested Debt Capital Structure Regulatory Assets Pending Final Regulatory Approval [Member] Regulatory Assets Pending Final Regulatory Approval [Member] Regulatory Assets Pending Final Regulatory Approval [Member] Revenue from Related Parties, Net Revenue from Related Parties, Net Amount of revenue, fees and commissions earned from transactions, net of provision for refunds between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates. Supplemental Balance Sheet Information Related to Leases Supplemental Balance Sheet Information Related to Leases [Table Text Block] Supplemental Balance Sheet Information Related to Leases Common Stock Dividends Affiliated Dividends Common Stock Equity impact of aggregate cash, stock, and paid-in-kind dividends declared to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. Credit Downgrade Trigger Exposure Credit Downgrade Trigger Exposure Credit Downgrade Trigger Exposure from contracts with collateral triggering events 2024 - 2026 [Member] Maturity Period Four [Member] WEIGHTED AVERAGE NUMBER OF BASIC AEP COMMON SHARES OUTSTANDING Weighted Average Number of Basic AEP Common Shares Outstanding Weighted Average Number of Shares Outstanding, Basic Cook Plant Study Costs [Member] Cook Plant Study Costs [Member] Cook Plant Study Costs. Common Collective Trust - Debt [Member] Common Collective Trust - Debt [Member] Common Collective Trust - Debt. Maturity of Credit Facility [Axis] Maturity of Credit Facility [Axis] Maturity of Credit Facility Approved Annual Revenue Increase Prior to Rehearing Approved Annual Revenue Increase Prior to Rehearing Amount of approved annual revenue increase prior to rehearing. LIABILITIES AND EQUITY Variable Interest Carrying Amount Liabilities And Equity [Abstract] Variable Interest Carrying Amount Liabilities And Equity. Term Loan 1 Term Loan 1 [Member] Term Loan 1 Target Asset Allocation Defined Benefit Plan, Plan Assets, Target Allocation, Percentage Derivative, Notional Amount Derivative, Notional Amount Initial Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year Accrued Interest Increase (Decrease) in Interest Payable, Net 364 Day Term Loan 364 Day Term Loan [Member] 364 Day Term Loan Depreciable Life Ranges - Other Public Utilities, Property, Plant and Equipment, Other Property Plant and Equipment, Useful Life Excess ADIT Associated with Certain Depreciable Property [Member] Excess ADIT Associated with Certain Depreciable Property [Member] Excess ADIT Associated with Certain Depreciable Property [Member] Finance Lease, Liability [Axis] Finance Lease, Liability [Axis] Finance Lease, Liability Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer 2021 Requested Increase in ENEC Rates 2021 Requested Increase in ENEC Rates 2021 Requested Increase in ENEC Revenues Regulatory Liabilities Pending Final Regulatory Determination [Member] Regulatory Liabilities Not Yet Being Paid [Member] Regulatory Liabilities Not Yet Being Paid Proposed Settlement Agreement ROE Proposed Settlement Agreement ROE Proposed Settlement Agreement ROE. Texas Mobile Generation Lease Payments [Member] Texas Mobile Generation Lease Payments [Member] Texas Mobile Generation Lease Payments Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Allowance for Funds Used During Construction (AFUDC) and Interest Capitalization Public Utilities, Allowance for Funds Used During Construction, Net Increase [Abstract] Regulatory Assets Approved for Recovery [Member] Regulatory Assets Being Recovered [Member] Regulatory Assets Being Recovered Member. Joint Venture Wind Farms [Member] JV Wind Farms [Member] JV Wind Farms [Member] Jurisdiction [Axis] Jurisdiction [Axis] Noncontrolling Interests [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Fair Value Measurements 1 (Textuals) Fair Value Measurements 1 (Textuals) [Abstract] Fair value measurements textuals abstract for assets and liabilities measured on a recurring basis. Reconciliation of Significant Temporary Differences Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Utility [Member] Utility [Member] Utility Company. Affiliated Revenues Affiliated Revenues [Text Block] Tabular disclosure of affiliated revenues. Changes in Carrying Amount of Goodwill Goodwill [Roll Forward] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Estimated Turk AFUDC Disallowance Estimated Turk AFUDC Disallowance Estimated Turk AFUDC Disallowance Weighted Average Dilutive Effect of Shares Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Jointly Owned Utility Plant [Axis] Jointly Owned Utility Plant [Axis] Debt Debt, Policy [Policy Text Block] Recommended Dolet Hills Fuel Disallowance Recommended Dolet Hills Fuel Disallowance Recommended Dolet Hills Fuel Disallowance Regulatory Liabilities Schedule of Regulatory Liabilities [Table Text Block] Year 5 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five Disposal Group, Including Discontinued Operation, Assets Disposal Group, Including Discontinued Operation, Assets Current Amount Recoverable from the Federal Government 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. Accretion Expense Asset Retirement Obligation, Accretion Expense Participant Contributions Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant Renewable Energy Credits Renewable Energy Credits Amount of renewable energy credits removed from the materials and supplies line item and split out separately on the face of the balance sheet due to materiality. Percentage Interest in Lease Percentage Interest in Lease AEGCo's percentage interest in Rockport Plant unit 2 lease. TOTAL CURRENT LIABILITIES Current Liabilities Liabilities, Current Stock Unit Accumulation Plan for Non-employee Directors Stock unit accumulation plan for non employee directors [Abstract] Stock unit accumulation plan for non-employee directors. Indiana Earnings Test Filings Indiana Earnings Test Filings [Member] Indiana Earnings Test Filings Debt-to-Total Capitalization Maximum Debt-to-Total Capitalization Maximum Transource Energy's credit facility agreement debt-to-total capitalization percentage maximum. Increase Decrease in Income Taxes Due to Tax Reserve Adjustments Increase Decrease in Income Taxes Due to Tax Reserve Adjustments The portion of the difference between total income tax expense (benefit) as reported in the Income Statement and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to tax reserve adjustments. Reversal of a Regulatory Provision Reversal of a Regulatory Provision Reversal of a Regulatory Provision. Energy and Capacity Purchase Contracts [Member] Energy and Capacity Purchase Contracts [Member] Energy and Capacity Purchase Contracts. Performance Units Manditorily Deferred as AEP Career Shares Share Based Compensation Performance Units Manditorily Deferred As Career Shares Performance Units Manditorily Deferred as Career Shares Income Tax Expense (Benefit): Income Tax Expense (Benefit), Continuing Operations [Abstract] AEP Consolidated Revenues - Other Revenues: Parent Companys Consolidated Revenues Other Revenues [Abstract] Parent Companys Consolidated Revenues Other Revenues. Oklaunion Generating Station (Unit No. 1) [Member] Oklaunion Generating Station (Unit No. 1) [Member] Oklaunion Generating Station (Unit No. 1) Member Fixed Performance Obligations Revenue, Remaining Performance Obligation, Amount Components of Change in Amounts Included in AOCI and Regulatory Assets Components Of Change In Plan Assets And Benefit Obligations Recognized In Pretax AOCI [Abstract] NBV Mitchell Including CWIP and Inventory NBV Mitchell Including CWIP and Inventory NBV Mitchell Including CWIP and Inventory Amount of Cash Collateral Posted Collateral Already Posted, Aggregate Fair Value Income Tax Authority [Domain] Income Tax Authority [Domain] Proposed Adjustments [Axis] Proposed Adjustments [Axis] Proposed Adjustments Other Financing Activities Proceeds from (Payments for) Other Financing Activities Spent Nuclear Fuel and Decommissioning Trusts Fair Value Spent Nuclear Fuel And Decommissioning Trusts 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. Northeastern Plant, Unit 3 [Member] 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. Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Fair Value of Derivative Instruments Derivative Instrument Detail [Abstract] Percentage of an Asset Acquired Percentage of an Asset Acquired Percentage of an asset acquired when AEP does not purchase the entire asset. Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Unrealized Loss on Forward Commitments [Member] Unrealized Loss on Forward Commitments [Member] Unrealized Loss on Forward Commitments Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Unrealized Loss on Securities Unrealized Loss on Securities Equity [Abstract] Equity [Abstract] 2017-2019 Virginia Triennial Revenue Provision [Member] 2017-2019 Virginia Triennial Revenue Provision [Member] 2017-2019 Virginia Triennial Revenue Provision Shares of Company Shares of Company [Abstract] Shares of Company. Anticipated Pretax Loss Range Upper Anticipated Pretax Loss Range Upper Anticipated Pretax Loss Range Upper ASSETS Variable Interest Carrying Amount Assets [Abstract] Variable Interest Carrying Amount Assets. Kentucky Power Co [Member] Kentucky Power Co [Member] Kentucky Power Company Member Consolidated Entities [Domain] Consolidated Entities [Domain] Asset Retirement Obligations (ARO) Liability for Nuclear Decommissioning of the Cook Plant Decommissioning Liability, Noncurrent 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 [Member] Other Long Term Debt [Member] Other long term debt member Accrued Reimbursement of Spent Nuclear Fuel Costs Accrued Reimbursement of Spent Nuclear Fuel Costs Accrued reimbursement of spent nuclear fuel costs at Cook nuclear plant. The Department of Energy has an obligation to I&M over the storage of spent nuclear waste. Net Actuarial Loss Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax West Virginia West Virginia [Member] West Virginia Reconciliation of Federal Statutory Tax Rate to Reported Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cost Investment Owned, at Cost Generation Property, Plant and Equipment, Generation Public Utilities, Property, Plant and Equipment, Generation or Processing Deferred Property Taxes Deferred Tax Assets, Property, Plant and Equipment Purchased Electricity from AEP Affiliates Cost of Purchased Power from Affiliate Cost of Purchased Power from Affiliate Cost of electricity purchased as well as fuel used to generate electricity used in operations and sold during the reporting period from affiliate. Entity Central Index Key Entity Central Index Key AEP's Ratio of OVEC Debt [Member] AEP's Ratio of OVEC Debt [Member] AEP's ratio of OVEC debt. Investment Tax Credit Amortization Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount Incremental Other Operation and Maintenance Expenses Utilities Operating Expense, Maintenance and Operations Billings from AEP Service Corporation [Member] Billings from AEP Service Corporation [Member] Billings from AEP Service Corporation variable interest entity member. Vegetation Management Vegetation Management [Member] Vegetation Management [Member] Vegetation Management Member. Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Concentrations of Credit Risk and Significant Customers Concentration Risk, Credit Risk, Policy [Policy Text Block] Pirkey Power Plant Accelerated Depreciation [Member] Pirkey Power Plant Accelerated Depreciation [Member] Pirkey Power Plant Accelerated Depreciation Entity [Domain] Entity [Domain] AEP Generating Co to Public Service Co of Oklahoma [Member] AEP Generating Co to Public Service Co of Oklahoma [Member] AEP Generating Co to Public Service Co of Oklahoma Member. Assets Assets [Abstract] Ohio Ohio [Member] Ohio Amortization of Generation Deferrals Amortization Of Generation Deferrals Amortizations related to recoveries of pre-2012 deferred fuel balances that are recovered by the Phase In Recovery Rider. Amortizations related to recoveries of deferred capacity costs that are recovered by the Retail Stability Rider ($4.00/MWh recovery of previously deferred OPCo capacity costs and previously deferred carrying costs per Case No. 14-1186-EL-RDR & March 2017 through June 2019 monthly amortization of remaining RSR capacity costs using the appropriate incremental rate multiplied by the current monthly RSR rider revenue). Sale of Stock [Axis] Sale of Stock [Axis] Over-recovered Fuel Costs - Ohio [Member] Over-recovered Fuel Costs - Ohio [Member] Over-recovered Fuel Costs - Ohio Asset Retirement Obligation - Louisiana [Member] Asset Retirement Obligation - Louisiana [Member] Asset Retirement Obligation - Louisiana [Member] Short-term Debt: Short-Term Debt [Abstract] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Principal Amount, 2023 Long-Term Debt, Maturity, Year One AEP Generating Co to Indiana Michigan Power Co [Member] AEP Generating Co to Indiana Michigan Power Co [Member] AEP Generating Co to Indiana Michigan Power Co. Deferred Credits and Other Noncurrent Liabilities Deferred Credits and Other Noncurrent Liabilities - Accrued Long-term Benefit Liability Other Liabilities, Noncurrent Other Liabilities, Noncurrent Deferred Fuel Costs Capitalization and Amortization of Fuel Costs, Policy [Policy Text Block] Rate Matters Public Utilities Disclosure [Text Block] Book Values and Fair Values of Long - term Debt Long-Term Debt, Other Disclosure [Abstract] Reclassifications To Accumulated Other Comprehensive Income [Member] Reclassifications To Accumulated Other Comprehensive Income [Member] Reclassifications To Accumulated Other Comprehensive Income [Member] Reverse Common Stock Split Reverse Common Stock Split Reverse common stock split to reduce the number of shares. Notes Receivable, Related Parties Notes Receivable, Related Parties Asset Retirement Obligation [Member] Asset Retirement Obligation [Member] Asset retirement obligation shown on the balance sheet Property, Plant and Equipment (Textuals) Property, Plant and Equipment (Textuals) [Abstract] Property Plant And Equipment Textuals Abstract. Reconciliation of Federal Income Taxes and Amount of Income Tax Reported Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] BP Wind Energy [Member] BP Wind Energy [Member] BP Wind Energy [Member] Reclassifications from AOCI, Net of Income Tax (Expense) Benefit Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Other Short-term Borrowings Other Short-Term Borrowings Impairment Charge Disallowed Plant Investments Impairment Charge Disallowed Plant Investments Impairment Charge recorded to recognize disallowed plant investments. Operating Leases, Total Future Minimum Lease Payments Lessee, Operating Lease, Liability, to be Paid For 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. Net Income (Loss) Net Income (Loss) Net Income (Loss) Net Income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Accelerated Depreciation Regulatory Asset Accelerated Depreciation The amount of accelerated depreciation as a regulatory asset for plants to be retired. Distribution Property, Plant and Equipment, Distribution Public Utilities, Property, Plant and Equipment, Distribution AEPTCo Parent [Member] AEPTCo Parent [Member] AEPTCo Parent [Member] ERCOT Transmission Service Charges ERCOT Transmission Service Charges [Abstract] ERCOT Transmission Service Charges [Abstract] Net Periodic Benefit Cost (Credit) Recognized in Expense Net Periodic Benefit Cost Recognized as Expense Net Periodic Benefit Cost recognized as expense. Maturity Date Low Debt Instrument Maturity Date Range Low Earliest date the outstanding debt instruments are required to be repaid. Payment Timing [Axis] Payment Timing [Axis] Payment Timing Sale Leaseback Transaction, Name [Domain] Sale Leaseback Transaction, Name [Domain] Principal Amount, 2024 Long-Term Debt, Maturity, Year Two Junior Subordinated Debt [Member] Junior Subordinated Debt [Member] Equity units [Member] Equity units [Member] Equity units issued by AEP in March 2019 All Other [Member] Other Segments [Member] Other Segments [Member] Plan Amendments Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment Texas Jurisdictional Share of Turk Plant Texas Jurisdictional Share of Turk Plant Texas jurisdictional share of the Turk Plant Generating Units Probable of Abandonment [Member] Generating Units Probable of Abandonment [Member] Generating Units Probable of Abandonment [Member] Domestic [Member] Defined Benefit Plan, Equity Securities, US [Member] 2023 - 2025 [Member] Maturity Period Three [Member] Remaining Recovery Period Regulatory Asset, Amortization Period Approved Additional Vegetation Management Expenses Approved Additional Vegetation Management Expenses Increase in approved additional vegetation management expenses 2012 Texas Base Rate Case [Member] 2012 Texas Base Rate Case [Member] 2012 Texas Base Rate Case [Member] COVID-19 - West Virginia [Member] COVID-19 - West Virginia [Member] COVID-19 - West Virginia Other Investing Activities Payments for (Proceeds from) Other Investing Activities Interest Rate Interest Rate [Abstract] Maximum, Minimum and Average Interest Rates for Funds Borrowed from and Loaned to the Nonutility Money Pool Maximum Minimum Average Interest Rates for Funds Borrowed from Loaned to Nonutility Money Pool [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. Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Plant Retirement Costs - Unrecovered Plant, Dolet Hills Power Station [Member] Plant Retirement Costs - Unrecovered Plant, Dolet Hills Power Station [Member] Plant Retirement Costs - Unrecovered Plant, Dolet Hills Power Station North Central Wind Energy Facilities [Axis] North Central Wind Energy Facilities [Axis] North Central Wind Energy Facilities Appalachian Consumer Rate Relief Funding [Member] Appalachian Consumer Rate Relief Funding [Member] Appalachian Consumer Rate Relief Funding [Member] International Equities [Member] International Equities [Member] International Equities [Member] Balance Sheet Information Segment Reporting Information, Additional Information [Abstract] Assets and Liabilities Held for Sale [Domain] Assets and Liabilities Held for Sale [Domain] Assets and Liabilities Held for Sale Provision for Refund-Affiliated Provision for Refund-Affiliated Provision for Refund-Affiliated Long-term Debt 5-Year Maturity Schedule of Maturities of Long-Term Debt [Table Text Block] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Rate of Compensation Increase Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Proposal for Decision Rate Increase Proposal for Decision Rate Increase Proposal for Decision Rate Increase 2020-2022 Virginia Triennial Review 2020-2022 Virginia Triennial Review [Member] 2020-2022 Virginia Triennial Review Additional Recognized Expenses Consisting Primarily of Depreciation and Vegetation Management Additional Recognized Expenses Consisting Primarily of Depreciation and Vegetation Management Increase in recognized expenses consisting primarily of depreciation and vegetation management Scenario [Axis] Scenario [Axis] Maturity Year [Domain] Maturity Year [Domain] 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 Interest Income Investment Income, Interest and Dividend Restoration Funding [Member] Restoration Funding [Member] Texas Restoration Funding for Hurricane Harvey State and Local Government [Member] US States and Political Subdivisions Debt Securities [Member] Estimated alternative CCR Investment Estimated alternative CCR Investment Estimated alternative CCR Investment Coal [Member] Coal [Member] Amount of Increase Related to Annual Depreciation Rates due to Proposed Investments Amount of Increase Related to Annual Depreciation Rates due to Proposed Investments Amount of increased annual depreciation rates due to proposed investments requested. Deferred Investment Tax Credits [Member] Deferred Investment Tax Credits [Member] Deferred Investment Tax Credits Member. Carrying Amount in AEP Generating Company's Accounts Payable [Member] Carrying Amount in AEP Generating Company's Accounts Payable [Member] Carrying amount in AEP Generating Company's accounts payable member. Amount of Gain (Loss) Recognized on Risk Management Contracts Schedule of Derivative Instruments Included in Trading Activities [Table Text Block] Historical Investment Basis Difference Historical Investment Basis Difference Historical Investment Basis Difference. The difference between the historical investment price and th purchase price allocated to an investment. Average Interest Rates for Funds Borrowed from and Loaned to Money Pool Average Interest Rates for Funds Borrowed From and Loaned to Money Pool [Abstract] Average Interest Rates for Funds Borrowed From and Loaned to Money Pool. AEP Texas Inc. [Member] AEP Texas Inc. [Member] AEP Texas Inc. Outstanding Indebtedness Outstanding Indebtedness Outstanding Indebtedness Statement of Cash Flows Statement of Cash Flows [Abstract] Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Notional Volume of Derivative Instruments Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Sold at Wholesale MWs [Member] Sold at Wholesale MWs [Member] Sold at Wholesale MWs [Member] Approved Item [Axis] Approved Item [Axis] Approved Item [Axis] 2021 Projected ENEC Cost Incease 2021 Projected ENEC Cost Incease 2021 Projected ENEC Cost Incease Accounts Receivable, Net Increase (Decrease) in Accounts and Other Receivables Total Liabilities And Equity [Member] Total Liabilities And Equity [Member] Total Liabilities And Equity Comparative Accounts Receivable Information Comparative accounts receivable information [Abstract] Comparative accounts receivable information. 2020-2022 Virginia Triennial Revenue Provision [Member] 2020-2022 Virginia Triennial Revenue Provision [Member] 2020-2022 Virginia Triennial Revenue Provision Finance Lease Liabilities Rolling Future Minimum Lease Payments Finance Lease, Liability, to be Paid, Rolling Maturity [Abstract] Status of Nonvested Restricted Shares and Restricted Stock Units Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Rockport Lease [Member] Rockport Lease [Member] Lease Type One. Property, Plant and Equipment [Member] Property, Plant and Equipment [Member] Asset Retirement Obligations Asset Retirement Obligation and Environmental Cost [Policy Text Block] 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 Abstract [Axis] Maturity of Fair Value Risk Management Contracts [Axis] Maturity Of Fair Value Risk Management Contracts Abstract [Axis] Operational Contingencies [Domain] Operational Contingencies [Domain] Operational Contingencies Non-Service Cost Components of Net Periodic Benefit Cost Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component Document Annual Report Document Annual Report 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. Legal Entity [Axis] Legal Entity [Axis] Maximum Potential Amount of Future Payments Associated with Guarantee Maximum Potential Amount of Future Payments Associated with Guarantee Maximum Potential Amount of Future Payments Associated with Guarantee Proceeds For Securitzation Bonds Proceeds For Securitzation Bonds Proceeds received for ODFA for ratepayer-backed securitization bonds. Utility Plant [Domain] Utility Plant [Domain] For 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. Auction Purchases From AEPEP [Member] Auction Purchases From AEPEP [Member] Auction Purchases From AEPEP Transmission and Distribution Utilities [Member] Transmission and Distribution Utilities Revenues [Member] 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 Risk Management Liabilities Current Risk Management Liabilities Derivative Liability, Current Restricted Shares and Restricted Stock Units [Member] Restricted Shares and Restricted Stock Units [Member] Restricted Shares and Restricted Stock Units. Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Michigan Michigan [Member] Michigan 2024 Defined Benefit Plan, Expected Future Benefit Payment, Year Three Pirkey Power Plant and Related Fuel Operations Pirkey Power Plant and Related Fuel Operations [Member] Pirkey Power Plant and Related Fuel Operations Product and Service [Domain] Product and Service [Domain] Entity Shell Company Entity Shell Company Decrease - Tax Positions Taken During a Prior Period Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Excess Nuclear Decommissioning Funding [Member] Excess Asset Retirement Obligations For Nuclear Decommissioning Liability [Member] Excess Asset Retirement Obligations For Nuclear Decommissioning Liability Member. Assets within Fair Value Hierarchy Schedule of Allocation of Plan Assets [Table Text Block] Affiliated Companies Affiliated Companies - Contracts with Customers Accounts Receivable, Related Parties, Current Financial Instrument [Axis] Financial Instrument [Axis] Revenues from Related Parties, Net of Provisions for Refund Revenues from Related Parties, Net of Provisions for Refund Revenues from Related Parties, Net of Provisions for Refund Subsequent Event [Member] Subsequent Event [Member] Consolidation Items [Domain] Consolidation Items [Domain] Document Period End Date Document Period End Date Loss on the Expected Sale of the Kentucky Operations Loss on Expected Sale of KPCo Loss on the expected sale of Kentucky Operations Debt and Equity Securities Within Other Temporary Investments Debt and Equity Securities Within Other Temporary Investments [Abstract] Activity for our debt and equity securities within Other Temporary Investments. Estimated CCR/ELG Costs Estimated CCR/ELG Costs Estimated CCR/ELG Costs New Jersey New Jersey [Member] New Jersey Corporate unit ownership share of an equity unit Corporate unit ownership share of an equity unit A corporate unit's undivided beneficial ownership interest in an equity unit Gross Amounts Offset in the Statement of Financial Position [Member] Gross Amounts Offset in Statement of Financial Position [Member] Gross Amounts Offset in the Statement of Financial Position. Net Book Value of Retired Plants Net Book Value of Retired Plants Net Book Value of Retired Plants, before cost of removal, including materials and supplies. Cardinal Power Plant Cardinal Power Plant [Member] Cardinal Power Plant Deferred Cook Plant Life Cycle Management Project Costs [Member] Michigan Deferred Cook Plant Life Cycle Management Project Costs [Member] Michigan Deferred Cook Plant Life Cycle Management Project Costs [Member] Securities Activity Within the Decommissioning and SNF Trusts Securities Activity Within Decommissioning and SNF Trusts [Text Block] Securities Activity Within the decommissioning and SNF trusts. Pirkey Power Plant Pirkey Plant and Welsh Plant [Member] Pirkey Plant and Welsh Plant Effects of Regulation Textuals [Abstract] Effects of Regulation Textuals [Abstract] Effects of Regulation Textuals [Abstract] Gains and Losses on Cash Flow Hedges Gains And Losses On Cash Flow Hedges [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions and Methodology [Abstract] Indiana Michigan Power Co [Member] Indiana Michigan Power Co [Member] Indiana Michigan Power Company Member Refund for Excess ADIT Refund for Excess ADIT Amount of refund to be given through rate reductions, riders, etc related to Excess ADIT. Barging, Urea Transloading and Other Services Barging, Urea Transloading and Other Services [Abstract] I&M provides barging, urea transloading and other transportation services to affiliates. Ohio Power Co to AEP Transmission Co [Member] Ohio Power Co to AEP Transmission Co [Member] Ohio Power Co to AEP Transmission Co [Member] Proposed Adjustments [Domain] Proposed Adjustments [Domain] Proposed Adjustments Other - Asset Backed [Member] Asset-Backed Securities [Member] Other Temporary Investments Other Temporary Investments [Text Block] Other Temporary Investments Organization and Summary of Significant Accounting Policies (Textuals) Organization and Summary of Significant Accounting Policies Textuals [Abstract] Organization and Summary of Significant Accounting Policies. Utility Plant in Service Jointly Owned Utility Plant, Gross Ownership Amount of Plant in Service 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. Federal: Federal Income Tax Expense (Benefit), Continuing Operations [Abstract] Award Type [Domain] Award Type [Domain] Notes Payable Other Notes Payable Accounts Receivable Receivable [Policy Text Block] Operating Lease Assets and Related Obligations Operating Lease Assets and Related Obligations [Table Text Block] Operating Lease Assets and Related Obligations Amount of Increase Related to Annual Depreciation Rates Amount of Increase Related to Annual Depreciation Rates Amount of increased depreciation expense approved. Cash Payouts for Performance Units Cash Payouts for Performance Units Cash Payouts for Performance Units. Amount of Increase Related to Annual Amortization Expense Amount of Increase Related to Annual Amortization Expense Amount of Increase Related to Annual Amortization Expense Commitments Guarantees and Contingencies [Abstract] Commitments Guarantees and Contingencies [Abstract] March 2023 [Member] March 2023 [Member] March 2023 Welsh Plant, Units 1 and 3 Accelerated Depreciation [Member] Welsh Plant, Units 1 and 3 Accelerated Depreciation [Member] Welsh Plant, Units 1 and 3 Accelerated Depreciation Proceeds on Sale of Receivables to AEP Credit Proceeds on Sale of Receivables to AEP Credit [Text Block] Proceeds on sale of receivables to AEP Credit. Transmission Revenues [Member] Transmission Revenues Affiliated [Member] Transmission Revenues Affiliated Decommissioning and Low Level Waste Accumulation Disposal [Member] Decommissioning and Low Level Waste Accumulation Disposal [Member] Decommissioning and Low Level Waste Accumulation Disposal [Member] AEPTHCo's investment in ETT and Transource Energy [Member] AEPTHCo's investment in ETT and Transource Energy [Member] AEP Transmission Holdco's investment in ETT and Transource Energy [Member] Years 2027 to 2031, in Total Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Traverse [Member] Traverse [Member] Traverse 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. Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Pension and Other Postretirement Plans' Assets Defined Benefit Plan, Information about Plan Assets [Abstract] Plant Retirement Costs - Unrecovered Plant [Member] Plant Retirement Costs - Unrecovered Plant [Member] Plant Retirement Costs - Unrecovered Plant [Member] Auditor Name Auditor Name Pension Plans [Member] Pension Plan [Member] Pension Plan [Member] Parent Company Loss Benefit Effective Income Tax Rate Reconciliation, Parent Company Loss Benefit The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to the loss benefit of the Parent company as attributable to the subsidiaries. Long-term Debt - Affiliated Affiliated Long Term Debt Noncurrent Sum of the affiliated carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. Requested Deferred Storm Costs Requested Deferred Storm Costs Requested Deferred Storm Costs Derivative, Volume Notional Amount Derivative Nonmonetary Volume Notional Amount Volume of heating oil and gasoline derivative contracts. Increase - Tax Positions Taken During a Prior Period Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Rockport Plant, Unit 2 [Member] Rockport Plant, Unit 2 [Member] Rockport Plant, Unit 2 Return of Capital to Parent Cash Flows Return of Capital to Parent Cash Flows Return of Capital to Parent Cash Flows Employee Related Expense [Member] Employee Related Expense [Member] Employee Related Expense Revised Requested Net Annual Increase Revised Requested Net Annual Increase Revised Requested Net Annual Increase Maintenance Utilities Operating Expense, Maintenance Components Components [Abstract] Components. Environmental Cost Rider - Indiana Rockport Plant Unit 2 Selective Catalytic Reduction [Member] Rockport Plant Unit 2 Selective Catalytic Reduction Cash and Cash Equivalents Cash and Cash Equivalents, Fair Value Disclosure Parent Company [Member] Parent Company [Member] Amount of Increase Related to SPP Expenses Amount of Increase Related to SPP Expenses Amount of Increase Related to SPP Expenses Central Machine Shop Central Machine Shop [Abstract] Central Machine Shop. Adjusted Cost of Debt Securities Adjusted cost of debt securities Adjusted cost of debt securities. Subsequent Events [Abstract] Colorado Colorado [Member] Colorado Operating Lease Asset and Related Obligations Operating Lease Asset and Related Obligations [Abstract] Operating Lease Asset and Related Obligations Direct Borrowing [Member] Direct Borrowing [Member] Direct Borrowing and Loans from and to Parent Deferred Deferred State and Local Income Tax Expense (Benefit) Pension Payments [Member] Pension Payments [Member] Pension Payments. 2022 [Member] Maturity Period One [Member] 2021 [Member] Changes in Carrying Amount of Goodwill Schedule of Goodwill [Table Text Block] International [Member] Defined Benefit Plan, Equity Securities, Non-US [Member] Restricted Stock Units Including Units Awarded for Dividends Rsus including units awarded for dividends [Abstract] RSUs including units awarded for dividends. Production Tax Credits Increase Decrease in income taxes due to energy production credits Increase Decrease in Income Taxes due to Energy Production Credits. Maximum Contractual Term of Outstanding Restricted Stock Units (in months) Maximum Contractual Term of Outstanding Restricted Stock Units Maximum Contractual Term of Outstanding Restricted Stock Units Risk Management Contracts [Member] Risk Management Commodity Contracts [Member] Risk Management Commodity Contracts [Member] Risk Management Contracts Member. 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. Revenues [Member] Operating Revenue [Member] Percentage of Risk associated with Operating Revenue. Protected Cell Of Energy Insurance Services, Inc. [Member] Protected Cell Of Energy Insurance Services, Inc. [Member] Protected Cell Of Energy Insurance Services, Inc. Variable Interest Entity Member Inventory Inventory, Policy [Policy Text Block] Barging, Urea Transloading and Other Services Barging, Urea Transloading and Other Services [Text Block] Tabular disclosure of I&M barging, urea transloading and other services. 2021 and 2022 ENEC Filing 2021 and 2022 ENEC Filing [Member] 2021 and 2022 ENEC Filing Common Stock Dividends Dividends, Common Stock Share Based Compensation Performance Units Converted to Shares Share Based Compensation Performance Units Converted to Shares Share Based Compensation Performance Units Converted to Shares. 2022 Requested Increase in ENEC Rates Second Filing 2022 Requested Increase in ENEC Rates Second Filing 2022 Requested Increase in ENEC Rates Second Filing Gross Realized Losses on Investment Sales Available-for-Sale Securities, Gross Realized Losses Revenue, Performance Obligation Revenue, Performance Obligation [Abstract] AFUDC Increase Decrease In Income Taxes Afudc The portion of the difference between total income tax expense (benefit) as reported in the Income Statement and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to AFUDC. WindGenerationMWs WindGenerationMWs Wind Generation (MWs) Initial Phased in Annual Increase Initial Phased in Annual Increase Amount of approved annual revenue increase that will be phased in initially. Principal Amount, 2027 Long-Term Debt, Maturity, Year Five Rockport Plant, Unit 2 Acquisition Price Rockport Plant, Unit 2 Acquisition Price Rockport Plant, Unit 2 Acquisition Price Public Service Co of Oklahoma to AEP Transmission Co [Member] Public Service Co of Oklahoma to AEP Transmission Co [Member] Public Service Co of Oklahoma to AEP Transmission Co [Member] Impairment Charge Total Impairment Charge Total Total impairment charge recorded as part of agreement. Power Participation Ratio Power Participation Ratio Power participation ratio Billings from Significant Variable Interest Billings from Significant Variable Interest [Text Block] Billings from significant variable interest entity. Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Tax Contingency [Abstract] Tax Contingency [Abstract] Tax Contingency [Abstract] Revenue Recognition Revenue [Policy Text Block] Principal Amounts of Junior Subordinated Debt Principal Amounts of Junior Subordinated Debt Principal Amounts Of Junior Subordinated Debt. The dollar amount that notes are broken into. Statement [Table] Statement [Table] Summary of Tax Credit Carryforwards Summary of Tax Credit Carryforwards [Table Text Block] AEP Share Price for Equity Unit Conversion AEP Share Price for Equity Unit Conversion AEP Share Price for Equity Unit Conversion Pension Costs [Member] Pension Costs [Member] 2020 Equity Units [Member] 2020 Equity Units [Member] 2020 Equity Units issued in August 2020. Corporate Units that convert to AEP Common Stock. Obligations Under Operating Leases Operating Lease Noncurrent Liability Operating Lease, Liability, Noncurrent Sensitivity of Fair Value Measurements Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Cost of Company Matching Contributions Defined Contribution Plan, Cost Statistical Measurement [Axis] Statistical Measurement [Axis] Mine End-of-Life Date Mine End-of-Life Date Mine end-of-life date related to Sabine. Asset Retirement Obligation, Liabilities Settled Liabilities Settled Asset Retirement Obligation, Liabilities Settled Regulatory Assets Currently Not Earning Return [Member] Regulatory Assets Currently Not Earning Return [Member] Regulatory Assets Currently Not Earning a Return Renewable Generation [Member] Renewable Generation [Member] Renewable Generation Texas Retail Electric Provider Bad Debt Expense Texas Retail Electric Provider Bad Debt Expense [Member] Texas Retail Electric Provider Bad Debt Expense Depreciation and Amortization Total Depreciation and Amortization Depreciation and Amortization Utilities Operating Expense, Depreciation and Amortization Utilities Operating Expense, Depreciation and Amortization Fair Value Of Derivative Liabilities Subject To Cross Acceleration Provisions Fair Value Of Derivative Liabilities Subject To Cross Acceleration Provisions Fair Value Of Derivative Liabilities Subject To Cross Acceleration Provisions Equity Ownership Percentage Equity Ownership Percentage Equity Ownership Percentage Amount of Dolet Hills Fuel Costs Approved to Recover Amount of Dolet Hills Fuel Costs Approved to Recover Amount of Dolet Hills Fuel Costs Approved to Recover in 2021. Approved Annual Revenue Cap for the DIR in 2022 Approved Annual Revenue Cap for the DIR in 2022 Approved Annual Increase of Revenues Capped for the DIR in 2022. Approved Annual Revenue Cap for the DIR in 2021 Approved Annual Revenue Cap for the DIR in 2021 Approved Annual Increase of Revenues Capped for the DIR in 2021. Nonvested, Shares/Units, Beginning Balance Nonvested, Shares/Units, Ending Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Retained Earnings Available to Pay Dividends Retained Earnings, Unappropriated Proceeds for KY Operations [Domain] Proceeds for KY Operations [Domain] Proceeds for KY Operations [Domain] Underfunded Projected Benefit Obligation Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets [Table Text Block] Wheeling Power Co to AEP Transmission Co [Member] Wheeling Power Co to AEP Transmission Co [Member] Wheeling Power Co to AEP Transmission Co [Member] Approved Annual Revenue Cap for the DIR in 2023 Approved Annual Revenue Cap for the DIR in 2023 Approved Annual Increase of Revenues Capped for the DIR in 2023. Maximum Future Payments for Letters of Credit Under Uncommitted Facilities Maximum Future Payments for Letters of Credit Under Uncommitted Facilities [Abstract] Maximum Future Payments for Letters of Credit Under Uncommitted Facilities [Abstract] Effective Income Tax Rate Reconciliation, Deduction, Percent Effective Income Tax Rate Reconciliation, Deduction, Percent Proceeds from Investment Sales Proceeds from Sale of Available-for-Sale Securities Goodwill Goodwill Disclosure [Text Block] Sempra Renewable LLC and Santa Rita Sempra Renewable LLC and Santa Rita [Member] Sempra Renewable LLC and Santa Rita Operating Lease Assets Operating Lease, Right-of-Use Asset Return of Capital to Parent Equity Statement Return of Capital to Parent Equity Statement Return of Capital to Parent Equity Statement Refund of Global Settlement Provision for Refund - Global Settlement Provisions for refund for obligations to customers as a result of the OPCo Global Settlement. Document Transition Report Document Transition Report 2023 Defined Benefit Plan, Expected Future Benefit Payment, Year Two Local Phone Number Local Phone Number Net Book Value of Amos and Mountaineer Plants - Virginia Net Book Value of Amos and Mountaineer Plants - Virginia Net Book Value of Amos and Mountaineer Plants - Virginia Second Matching Contributions Provided Percentage Second Matching Contributions Provided Percentage Second Matching Contributions Provided. OPERATING INCOME (LOSS) Operating Income (Loss) Operating Income (Loss) Net Deferred Tax Liability and Significant Temporary Differences Net Deferred Tax Liability and Significant Temporary Differences [Abstract] Net deferred tax liability and significant temporary differences. Return on Common Equity [Member] Return on Common Equity [Member] Return on Common Equity Incremental Long-Term Incentive Plan Grants Incremental Long-Term Incentive Plan Grants [Member] Incremental Long-Term Incentive Plan Grants Retail, Trading and Marketing Revenue [Member] Marketing, Competitive Retail and Renewable [Member] Marketing, Competitive Retail and Renewable [Member] Weighted Average Dilutive Effect of: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Deferred Fuel Over/Under-Recovery, Net 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. PJM/SPP Annual Formula Rate True Up [Member] PJM/SPP Annual Formula Rate True Up [Member] PJM/SPP Annual Formula Rate True Up [Member] Basis Points Over Authorized Return on Equity Considered Excess Earnings Basis Points Over Authorized Return on Equity Considered Excess Earnings The amount of basis points over the authorized ROE considered Excess Earnings. Expenses from Barging, Urea Transloading and Other Services Expenses from Barging, Urea Transloading and Other Services Expenses from barging, urea transloading and other services provided by I&M. Property, Plant and Equipment Depreciation, Depletion, and Amortization [Policy Text Block] Future Minimum Lease Payments Future Minimum Lease Payments for Sale and Leaseback [Table Text Block] Future Minimum Lease Payments for sale-and-leaseback. Recovery of Spent Nuclear Fuel Storage Costs 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. United States Bonds [Member] US Treasury Bond Securities [Member] Allocated Assets of Investments Allocated Assets of Investments Percentage of investments that are allocated to the Registrant Subsidiary. Approved Annual Increase in 2023 Approved Annual Increase in 2023 Approved Annual Increase in 2023 Property, Plant and Equipment and Equity Investments Property, Plant and Equipment, Policy [Policy Text Block] Accumulated Benefit Obligation Accumulated Benefit Obligation [Abstract] Accumulated Benefit Obligation. Approved Annual Increase in 2022 Approved Annual Increase in 2022 Approved Annual Increase in 2022 2022 Approved Projected ENEC Rate Increase 2022 Approved Projected ENEC Rate Increase 2022 Approved Projected ENEC Rate Increase Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Document Fiscal Period Focus Document Fiscal Period Focus Liabilities, Total [Member] Liabilities, Total [Member] ASU 2018-02 Adoption Stockholders Equity ASU 2018-02 Adoption This element represents movements included in the statement of changes in stockholders' equity which are specifically related to the adoption of ASU 2018-02. Cash Payments for Non Employee Director Plans Cash Payments for Non Employee Director Plans Cash Payments for Non Employee Director Plans Other Short-term Debt Short-Term Bank Loans and Notes Payable Capital Lease Term Capital Lease Terms Maximum Capital Lease Terms Maximum Regulatory Assets Noncurrent Regulatory Assets Regulatory Asset, Noncurrent Other Regulatory Liabilities Pending Final Regulatory Determination [Member] Other Regulatory Liabilities Not Yet Being Paid [Member] Other Regulatory Liabilities Not Yet Being Paid Member. Regulatory Liability for Over-Recovered Fuel Costs Current Regulatory Liabilities Regulatory Liability, Current Accounts Receivable and Accrued Unbilled Revenues Accounts Receivable and Accrued Unbilled Revenues [Text Block] Accounts receivable and accrued unbilled revenues under the sale of receivables agreement. Desert Sky and Trent PPA Period Desert Sky and Trent PPA Period Desert Sky and Trent PPA for the sale of power to AEPEP related to deliveries of electricity beginning January 1, 2021 for a 12 year period. Approved Item in Commission Order Approved Item in Commission Order An item that is approved in a commission order. Berkshire Hathaway [Member] Berkshire Hathaway [Member] Berkshire Hathaway. Medicare Subsidy Defined Benefit Plan, Benefit Obligation, Prescription Drug Subsidy Receipt Amount Of Increased Depreciation Expense Requested Amount Of Increased Depreciation Expense Requested Amount of increased depreciation expense requested. Issuance of Long-term Debt Proceeds from Issuance of Long-term Debt Proceeds from Issuance of Long-Term Debt EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS Net Income (Loss) Net Income (Loss) Available to Common Stockholders, Basic NCWF [Member] NCWF [Member] NCWF Liabilities Held for Sale Disposal Group, Including Discontinued Operation, Liabilities, Current Equity Method Investment Investments in Equity Method Investees Equity Method Investments Equity Method Investments Construction Expenditures Included in Noncurrent Liabilities as of December 31, Capital Expenditures Incurred but Not yet Paid 2019 Equity Units [Member] 2019 Equity Units [Member] 2019 Equity Units issued in March 2019. Corporate Units that convert to AEP Common Stock. Customer Deposits Customer Deposits, Current Customer Deposits, Current Cook Plant Uprate Project [Member] Cook Plant Uprate Project [Member] Cook Plant Uprate Project [Member] Notional Amount of a Discontinued Hedge Notional Amount of a Discontinued Hedge Notional Amount of a Discontinued Hedge Related Party Transactions (Textuals) Related Party Transactions (Textuals) [Abstract] Related Party Transactions Textuals Abstract Other Regulatory Liabilities Approved for Payment [Member] Other Regulatory Liabilities Being Paid [Member] Other Regulatory Liabilities Being Paid Fair Value of Legally Restricted Assets Asset Retirement Obligation, Legally Restricted Assets, Fair Value 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. TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO SHAREHOLDERS Comprehensive Income (Loss), Net of Tax, Attributable to Parent Guarantor Obligations, Current Carrying Value Guarantor Obligations, Current Carrying Value Guarantor Obligations, Current Carrying Value Disallowance Item [Domain] Disallowance Item [Domain] [Domain] for Disallowance Item [Axis] Uncommitted Facility Uncommitted Facility Amount of letters of credit drawn on an uncommitted credit facility. Percentage of DHLCs Debt Guaranteed by Each SWEPCo and CLECO Percentage Of VIE Debt Guaranteed Percentage of DHLCs debt guaranteed by each SWEPCo and CLECO. Stock Based Compensation (Textuals) Stock Based Compensation Textuals [Abstract] Stock Based Compensation Textuals Abstract. Impairment Charge Dolet Hills Power Station Impairment Charge Dolet Hills Power Station Impairment Charge Dolet Hills Power Station Other Current Liabilities Finance Lease Liability Due Within One Year Other Liabilities, Current Proposed ESP Return on Common Equity Proposed ESP Return on Common Equity Proposed ESP Return on Common Equity Contract with Customer, Duration [Axis] Contract with Customer, Duration [Axis] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entities Finance Lease Liabilities [Member] Finance Lease Liabilities [Member] Finance Lease Liabilities. Ohio Transmission Company [Member] Ohio Transmission Company [Member] Ohio Transmission Company Income Taxes, Net [Member] Income Taxes, Net [Member] Income Taxes, Net Accumulated Provisions For Rate Refunds Accumulated Provisions For Rate Refunds Refunds for costs collected in formula rates. Joint License Agreement Joint License Agreement [Table Text Block] [Table Text Block] for Joint License Agreement [Table] Future Minimum Rentals, Sale Leaseback Transactions Minimum Lease Payments, Sale Leaseback Transactions, Fiscal Year Maturity [Abstract] Shares Per Equity Unit Shares Per Equity Unit Amount of shares issued per equity unit at maturity Requested Fuel Cost Deferral Requested Fuel Cost Deferral Requested fuel cost deferral amount in filing. Lump Sum Salary Payments and Cash Subsidies Lump Sum Salary Payments and Cash Subsidies [Member] Lump Sum Salary Payments and Cash Subsidies Depreciation Expense [Member] Depreciation Expense [Member] Depreciation Expense Pension and OPEB Funded Status, Net of Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Forward Equity Purchase Contracts Included in Current and Noncurrent Liabilities as of December 31, Stockholders' Equity, Other Disposal Group, Including Discontinued Operation, Other Assets Disposal Group, Including Discontinued Operation, Other Assets Peak Demand Reduction/Energy Efficiency [Member] Energy Efficiency/Peak Demand Reduction [Member] Energy Efficiency/Peak Demand Reduction. Cook Nuclear Plant [Member] Cook Nuclear Plant [Member] Cook Nuclear Plant Requested Annual Increase in Rebuttal Requested Annual Increase in Rebuttal Requested Annual Increase in Rebuttal Stock Unit Accumulation Plan for Non Employee Directors [Member] Stock Unit Accumulation Plan for Non Employee Directors [Member] Stock Unit Accumulation Plan for Non-Employee Directors. Regulatory Liabilities [Domain] Regulatory Liabilities [Domain] Regulatory Liabilities Domain. Entities [Table] Entities [Table] Guarantee Obligations Current Carrying Value Other Liabilities Current GuaranteeObligationsCurrentCarryingValueOtherLiabilitiesCurrent The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees recorded under Other Current Liabilities. Shares/Units, Forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Schedule Of Cost Method Investment Cost Method Investee Name [Axis] Schedule Of Cost Method Investment Cost Method Investee Name [Axis] Information by investee name in which the entity has an investment accounted for under the cost method of accounting. COVID-19 [Member] COVID-19 [Member] COVID-19 Balance Sheet Location [Axis] Balance Sheet Location [Axis] Amos Plant Amos Plant [Member] Amos Plant Non-cash Acquisitions Under Operating Leases Non-cash Acquisitions Under Operating Leases Non-cash Acquisitions Under Operating Leases Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Other Noncurrent Assets Assets, Noncurrent [Abstract] Unrealized Gain on Forward Commitments [Member] Unrealized Gain on Forward Commitments [Member] Unrealized Gain on Forward Commitments Member. Energy Contracts [Member] Energy Contracts [Member] Risk management commodity contracts whose primary underlying risk is tied energy contracts. Accumulated Other Comprehensive Income (Loss) Beginning Balance in AOCI Ending Balance in AOCI Accumulated Other Comprehensive Income (Loss), Net of Tax Affiliated and Nonaffiliated [Member] Affiliated and Nonaffiliated [Member] Includes affiliated and nonaffiliated revenues. AEP Generating Co [Member] AEP Generating Co [Member] AEP Generating Company Expected Return on Plan Assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets Restricted Cash for Securitized Funding Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] TOTAL CURRENT ASSETS Current Assets Assets, Current Adjusted Cost of Domestic Equity Securities Adjusted Cost Of Equity Securities Adjusted cost of equity securities within the nuclear trusts Entity Small Business Entity Small Business Fuel Purchase Contracts [Member] Fuel Purchase Contracts [Member] Fuel Purchase Contracts. Revenues Revenues Revenues [Abstract] Common Stock Dividends - Nonaffiliated Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Regulatory Liabilities and Deferred Investment Tax Credits Noncurrent Regulatory Liabilities Regulatory Liability, Noncurrent Asset Retirement Obligation (ARO) Schedule of Change in Asset Retirement Obligation [Table Text Block] Organization and Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Significant Accounting Policies [Text Block] Vegetation Management Programs [Member] Vegetation Management Programs [Member] Vegetation Management Programs Total Unrecognized Compensation Cost Related to Unvested Share-based Compensation Arrangements Granted Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Changes in Accumulated Other Comprehensive Income (Loss) by Component Changes In Accumulated Other Comprehensive Income by Component [Abstract] Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Charitable Contribution to AEP Foundation [Table Text Block] Charitable Contribution to AEP Foundation [Table Text Block] Charitable Contribution to AEP Foundation [Table Text Block] Amount Collected through a Rider for Final Mine Closure - ARO Noncurrent Amount Collected, Rider Mine Close ARO Noncurrent Amount Collected, Rider Mine Close ARO Noncurrent Amount collected through a rider for final mine closure and reclamation costs recorded in asset retirement obligations Public Utilities, General Disclosures [Line Items] Public Utilities, General Disclosures [Line Items] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Consolidated Entities [Axis] Consolidated Entities [Axis] Senior Unsecured Notes Unsecured Debt Derivative, Energy Notional Amount Derivative Nonmonetary Energy Notional Amount Volume of power derivatives contracts. Total Principal Outstanding Principal Amount Outstanding on Loans Held-for-sale or Securitization or Asset-Backed Financing Arrangement Property, Plant and Equipment and Related Obligations Under Finance Leases Property Plant and Equipment and Related Obligations Under Finance Leases [Table Text Block] Property, Plant and Equipment and Related Obligations Under Finance Leases. Securitization Bonds [Member] Securitization Bonds [Member] A collateralized debt obligation (backed by pledge, mortgage or other lien on the entity's assets). Related Party Purchases of Property Related Party Purchases of Property AEP subsidiaries' purchases of property with certain affiliates. SWEPCo's Share of Obligations [Member] SWEPCo's Share of Obligations [Member] SWEPCo's share of obligations. Long-term Under-recovered Fuel Costs - Virginia [Member] Long-term Under-recovered Fuel Costs - Virginia [Member] Long-term Under-recovered Fuel Costs - Virginia Letters of Credit [Member] Letters of Credit [Member] Letters of Credit Member. Deferred Tax Assets, Tax Credit Carryforwards [Abstract] Deferred Tax Assets, Tax Credit Carryforwards [Abstract] Interest Rate Foreign Currency Hedges [Member] Interest Rate Foreign Currency Hedges [Member] Junior Subordinated Notes [Member] Junior Subordinated Notes [Member] Junior Subordinated Notes Member Contractual Maturities, Fair Value of Debt Securities Investments Classified by Contractual Maturity Date [Table Text Block] Requested Recovery of Dolet Hills Power Station Requested Recovery of Dolet Hills Power Station The amount requested for recovery of Dolet Hills Power Station. Maturity Period Eight [Member] 2029 - 2033 [Member] Maturity Period Eight [Member] Maturity Period Eight. Entity Filer Category Entity Filer Category Commodity Hedges [Member] Commodity [Member] Refund for Over Collections Refund for Over Collections Refund to customers for over collections based on annual increase being overstated. Voluntary Retirement Incentive Program [Axis] Voluntary Retirement Incentive Program [Axis] Voluntary Retirement Incentive Program 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 Liabilities, Fair Value Disclosure Liabilities, Fair Value Disclosure [Abstract] Compensation Cost for Share-based Payment Arrangements Share-Based Payment Arrangement, Expense Staff Recommended Annual Revenue Cap for the DIR in 2023 Staff Recommended Annual Revenue Cap for the DIR in 2023 Staff Recommended Annual Increase of Revenues Capped for the DIR in 2023. Security Exchange Name Security Exchange Name Staff Recommended Annual Revenue Cap for the DIR in 2021 Staff Recommended Annual Revenue Cap for the DIR in 2021 Staff Recommended Annual Increase of Revenues Capped for the DIR in 2021. Staff Recommended Annual Revenue Cap for the DIR in 2022 Staff Recommended Annual Revenue Cap for the DIR in 2022 Staff Recommended Annual Increase of Revenues Capped for the DIR in 2022. AEP Texas Interim Transmission and Distribution Rates [Member] AEP Texas Interim Transmission and Distribution Rates [Member] AEP Texas Interim Transmission and Distribution Rates Equity Units Annual Distribution Rate Equity Units Annual Distribution Rate Equity Units Annual Distribution Rate Auction Purchases from AEPSC [Member] Auction Purchases From AEPSC [Member] Auction Purchases From AEPSC Average Borrowings from Money Pool 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. Allowance for Funds Used During Construction (AFUDC) and Interest Capitalization Allowance for Funds Used During Construction, Policy [Policy Text Block] Assets Held for Sale Disposal Group, Including Discontinued Operation, Assets, Current Parent Ownership Interest In ETT Parent Ownership Interest In ETT Parents equity ownership interest in ETT. Regulatory Liability [Axis] Regulatory Liability [Axis] Rate Case Expense [Member] Rate Case Expense [Member] Rate Case Expense. Cash and Cash Equivalents [Member] Cash and Cash Equivalents [Member] Noncurrent Liabilities Liabilities, Noncurrent Liabilities, Noncurrent [Abstract] Cover [Abstract] Property, Plant and Equipment Property, Plant and Equipment Property, Plant and Equipment, Gross [Abstract] Impact of Fair Value Hedges on the Balance Sheet Impact of Fair Value Hedges on the Balance Sheet [Abstract] Impact of Fair Value Hedges on the Balance Sheet. Joint License Agreement Joint License Agreement 50 year joint license agreement between AEPTCo and operating companies allowing either party to occupy the granting party's facilities or real property. Accrued Nuclear Decommissioning Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Asset Retirement Obligations Plant Retirement Costs - Asset Retirement Obligation Costs [Member] Asset Retirement Obligation Related to Retired Plants [Member] Asset Retirement Obligation Related to Retired Plants [Member] Money Pool Participant by Company Type [Axis] Money Pool Participant by Company Type [Axis] Money Pool Participant by Company Type. Segment Reporting [Abstract] Segment Reporting [Abstract] Corresponding Regulatory Liability that was Recorded for Reduction to Revenues Corresponding Regulatory Liability that was Recorded for Reduction to Revenues The total corresponding regulatory liability that was recorded for a reduction to revenues. Risk Management Assets Current Risk Management Assets Derivative Asset, Current Held For Sale [Member] Held For Sale [Member] Held For Sale [Member] Kentucky Power Company and Kentucky Transmission Company Kentucky Power Company and Kentucky Transmission Company [Member] Kentucky Power Company and Kentucky Transmission Company Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Unamortized Loss on Reacquired Debt [Member] Loss on Reacquired Debt [Member] Virginia Jurisdictional AMR Meters [Member] Virginia Jurisdictional AMR Meters [Member] Virginia Jurisdictional AMR Meters [Member] Infrastructure [Member] Infrastructure [Member] Infrastructure. Operating Loss Carryforwards, Expiration Date Operating Loss Carryforwards, Expiration Date 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. Purchases of Investment Securities Payments to Acquire Investments Unregulated Operation [Member] Unregulated Operation [Member] Change in Regulatory Assets Change in Regulatory Assets The increase (decrease) during the reporting period in regulatory assets. Equity and Voting Ownership Percentage Equity and Voting Ownership Percentage Equity And Voting Ownership Percentage TOTAL DILUTED EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS Earnings Per Share, Diluted Earnings Per Share, Diluted Pension and Postemployment Benefit Reserves Pension and Other Postretirement Benefits Cost (Reversal of Cost) Noncash Contribution of Assets to Cedar Creek Project Contribution of Property Accumulated Benefit Obligation Defined Benefit Plan, Accumulated Benefit Obligation Nuclear Incident Liability [Member] Nuclear Incident Liability [Member] Nuclear Incident Liability Member. Difference between Carrying Value and Underlying equity Difference between Carrying Value and Underlying Equity Difference between Carrying Value and Underlying Equity Consolidation Items [Axis] Consolidation Items [Axis] Total Noncurrent Regulatory Liabilities [Member] Total Noncurrent Regulatory Liabilities [Member] Total Noncurrent Regulatory Liabilities Smart Grid Costs [Member] Smart Grid Costs [Member] Long-term PPA MWs [Member] Long-term PPA MWs [Member] Long-term PPA MWs [Member] Public Utilities, General Disclosures [Abstract] Public Utilities, General Disclosures [Abstract] Requested Net Increase in Texas Annual Revenues Requested Net Increase in Texas Annual Revenues Requested net increase in Texas annual revenues. PJM Transmission Enhancement Refund [Member] PJM Transmission Enhancement Refund [Member] PJM Transmission Enhancement Refund [Member] Equity Method Ownership [Axis] Equity Method Ownership [Axis] Information by name of entity in which equity method ownership interest is disclosed. Refund Item [Domain] Refund Item [Domain] [Domain] for Refund Item [Axis] Equity Securities [Member] Equity Securities [Member] Refund for Excess ADIT Associated with Certain Depreciable Property Refund for Excess ADIT Associated with Certain Depreciable Property Amount of refund to be given through rate reductions, riders, etc related to Excess ADIT Associated with Certain Depreciable Property. Wind [Member] Wind [Member] Wind Percentage of VIE Sales of Lignite Produced Percentage Of VIE Sales Of Lignite Produced Percentage of VIE sales of lignite produced. Trent and Desert Sky Wind Farms [Member] Trent and Desert Sky Wind Farms [Member] Trent and Desert Sky Wind Farms [Member] Income Taxes (Textuals) [Abstract] Income Taxes (Textuals) [Abstract] Income Taxes. Discount Rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Ash Pond [Member] Ash Pond [Member] Ash Pond Supplemental Information Related to Leases Supplemental Information Related to Leases [Abstract] Supplemental Information Related to Leases Operating Lease Liabilities Rolling Future Minimum Lease Payments Lessee, Operating Lease, Liability, Maturity [Table Text Block] Total Property, Plant and Equipment - Net [Domain] Total Property, Plant and Equipment - Net [Domain] Total Property, Plant and Equipment - Net Share of Net Investment in Pirkey Power Plant Share of Net Investment in Pirkey Power Plant SWEPCo's share of the net investment in Pirkey Power Plant Variable Interest Entities (Textuals) Variable Interest Entities (Textuals) [Abstract] 2022 Minimum Lease Payments, Sale Leaseback Transactions, Next 12 Months Total Compensation Cost Capitalized Share-Based Payment Arrangement, Amount Capitalized Tax Credit Carryforward, Expiration Date Tax Credit Carryforward, Expiration Date Proceeds for KY Operations [Axis] Proceeds for KY Operations [Axis] Proceeds for KY Operations Performance Units Earned Share Based Compensation Performance Units Earned Performance Units Earned. Allowance For Equity Funds Used During Construction Allowance For Equity Funds Used During Construction [Table Text Block] Allowance for equity funds used during construction. Public Utilities, Inventory, Lignite [Member] Public Utilities, Inventory, Lignite [Member] A soft brownish coal between bituminous coal and peat, which is extracted from the ground and used as fuel. Deferred Premium Assessment Annual Payment Deferred premium assessment annual payment Deferred premium assessment annual payment. Senior Unsecured Notes Senior Unsecured Notes [Member] Senior Unsecured Notes Staff and Intervenor Recommended Base Rate Increase/Decrease Staff and Intervenor Recommended Base Rate Increase/Decrease Staff and Intervenor Recommended Base Rate Increase/Decrease Revenue from Contracts with Customers [Abstract] Revenue from Contracts with Customers [Abstract] Revenue from Contracts with Customers [Abstract] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Total Amount Collected through a Rider for Final Mine Closure and Reclamation Costs 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. Approved Deferral of Dolet Hills Fuel Costs Approved Deferral of Dolet Hills Fuel Costs Approved Deferral of Dolet Hills Fuel Costs in 2021 Actuarial Assumption Financial Statement Effect [Domain] Actuarial Assumption Financial Statement Effect [Domain] [Domain] for Actuarial Assumption Financial Statement Effect. Unamortized Discount, Net and Debt Issuance Costs Unamortized Debt Issuance Expense Funded (Underfunded) Status as of December 31 Defined Benefit Plan, Funded (Unfunded) Status of Plan Reduction in Aggregate Common Shares Authorized Per Share Issued Pursuant to Stock Options or Stock Appreciation Rights Reduction in Aggregate Common Shares Authorized Per Share Issued Pursuant to Stock Options or Stock Appreciation Rights Reduction in Aggregate Common Shares Authorized Per Share Issued Pursuant to Stock Options or Stock Appreciation Rights Requested Net Increase in Oklahoma Annual Increase Requested Net Increase in Oklahoma Annual Increase Requested Net Increase in Oklahoma Annual Increase Operating Cash Flows Used for Finance Leases Finance Lease, Interest Payment on Liability Participant Contributions Defined Benefit Plan, Plan Assets, Contributions by Plan Participant Common Stock, No Par Value Common Stock, No Par Value Estimated ELG Investment Estimated ELG Investment Estimated ELG Investment Nature of Expense [Axis] Nature of Expense [Axis] Maximum Length of Time Hedged in Price Risk Cash Flow Hedge Maximum Length of Time Hedged in Price Risk Cash Flow Hedge Actuarial Assumptions for Net Periodic Benefit Costs Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Maximum Future Payments for Letters of Credit Issued Under the Uncommitted Facility Maximum Future Payments for Letters of Credit Issued Under the Uncommitted Facility Maximum future payments for Letters of Credit issued under the uncommitted facility. Commercial Paper [Member] Commercial Paper [Member] Liabilities Subject to Cross Default Provisions Cross Default Provision [Text Block] Tabular disclosure of liabilities subject to cross default provisions. Spent Nuclear Fuel Disposal [Member] Spent Nuclear Fuel Disposal [Member] Spent Nuclear Fuel Disposal Member Performance Units Performance units [Abstract] Performance units. Equity [Member] Equity [Member] Other Operation Utilities Operating Expense, Operations Utilities Operating Expense, Operations Mineral Rights Mineral Rights [Member] Mineral Rights Noncash or Part Noncash Acquisition, Debt Assumed Noncash or Part Noncash Acquisition, Debt Assumed Total of Amounts Included in AOCI, Income Tax Expense and Regulatory Assets Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Disallowance of 2020 OVEC Costs Disallowance of 2020 OVEC Costs Disallowance of 2020 OVEC Costs Retirement Benefits [Abstract] Retirement Benefits [Abstract] 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) HLBV Income for Noncontrolling Interests HLBV Income for Noncontrolling Interests HLBV Income attributable for Noncontrolling Interests Public Utilities, Approved Debt Capital Structure, Percentage Public Utilities, Approved Debt Capital Structure, Percentage Maturity of Credit Facility [Domain] Maturity of Credit Facility [Domain] Maturity of Credit Facility [Domain] Long-term PPA Energy Production Long-term PPAs Energy Production Long-term PPAs Energy Production AEP Texas Cumulative Revenues Subject to Review AEP Texas Cumulative Revenues Subject to Review AEP Texas cumulative revenues, subject to review, based upon interim rate increases received. Financing Activities Net Cash Provided by (Used in) Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Auction Purchases From AEP Energy [Member] Auction Purchases From AEP Energy Partners [Member] [Domain] Auction Purchases From AEP Energy Partners [Member] [Domain] Provision for Refund Provision for Refund Provision for Refund Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions Asset Impairments and Other Related Charges Asset Impairment Charges Proposed Grid Transformation Plan Proposed Grid Transformation Plan Proposed Grid Transformation Plan Taxes Other Than Income Taxes Taxes, Miscellaneous Long-term Risk Management Liabilities Derivative Liability, Noncurrent Derivative Liability, Noncurrent