XML 128 R59.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Rate Matters West Companies (Details) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) MW | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Public Utilities, General Disclosures [Line Items] |  |  |  |
Other Asset Impairment Charges |  | $ 85.6 | $ 48.8 | $ 11.6
Net Investment |  | 76,693.4 | 73,339.1 |
Noncurrent Regulatory Assets |  | 5,092.4 | 4,762.0 |
AEP Texas Inc. [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Net Investment |  | 12,774.0 | 11,681.6 |
Noncurrent Regulatory Assets |  | 315.3 | 298.3 |
Public Service Co Of Oklahoma [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Net Investment |  | 6,112.3 | 5,626.5 |
Noncurrent Regulatory Assets |  | 522.7 | 653.7 |
Southwestern Electric Power Co [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Other Asset Impairment Charges |  | 85.6 | 0.0 | 11.6
Provision for Refund |  | (34.8) | (5.6) | $ (0.4)
Net Investment |  | 8,558.4 | 8,262.2 |
Noncurrent Regulatory Assets |  | 1,131.8 | 1,042.4 |
AEP Texas Interim Transmission and Distribution Rates [Member] | AEP Texas Inc. [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
AEP Texas Cumulative Revenues Subject to Review |  | $ 987.0 |  |
ETT Interim Transmission Rates [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Parent Ownership Interest In ETT |  | 50.00% |  |
AEP Share Of ETT Cumulative Revenues Subject To Review |  | $ 1,700.0 |  |
2012 Texas Base Rate Case [Member] | Southwestern Electric Power Co [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
2013 Reversal Of Previously Recorded Regulatory Disallowances |  | 114.0 |  |
Turk AFUDC Disallowance |  | 86.0 |  |
Estimated Reduced Annual Revenues |  | $ 15.0 |  |
2016 Texas Base Rate Case [Member] | Southwestern Electric Power Co [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Requested Return on Equity |  | 10.00% |  |
Approved Return on Common Equity |  | 9.60% |  |
Requested Net Increase in Texas Annual Revenues |  | $ 69.0 |  |
Approved Net Increase in Texas Annual Revenues |  | 50.0 |  |
Approved Additional Vegetation Management Expenses |  | 2.0 |  |
Impairment Charge Total |  | 19.0 |  |
Impairment Charge Welsh Plant, Unit 2 |  | 7.0 |  |
Impairment Charge Disallowed Plant Investments |  | 12.0 |  |
Additional Revenues Recognized to be Surcharged to Customers |  | 32.0 |  |
Additional Recognized Expenses Consisting Primarily of Depreciation and Vegetation Management |  | 7.0 |  |
2020 Texas Base Rate Case [Member] | Southwestern Electric Power Co [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Requested Annual Increase |  | $ 105.0 |  |
Approved Return on Common Equity |  | 9.25% |  |
Impairment Charge Total |  | $ 12.0 |  |
Requested Return on Equity |  | 10.35% |  |
Requested Net Annual Increase |  | $ 90.0 |  |
Revised Requested Annual Increase |  | 100.0 |  |
Revised Requested Net Annual Increase |  | 85.0 |  |
Approved Annual Revenue Increase |  | 39.0 |  |
Amount of Approved Increase Related to Vegetation Management |  | 5.0 |  |
Amount of Approved Increase Related to Storm Catastrophe Reserve |  | 2.0 |  |
2020 Louisiana Base Rate Case [Member] | Southwestern Electric Power Co [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Requested Annual Increase |  | $ 134.0 |  |
Approved Return on Common Equity |  | 9.50% |  |
Requested Return on Equity |  | 10.35% |  |
Revised Requested Annual Increase |  | $ 95.0 |  |
Approved Annual Revenue Increase |  | 27.0 |  |
Authorized Annual Base Rate Increase |  | 21.0 |  |
Approved Rider to Recover Dolet Hils and Pirkey Costs |  | 14.0 |  |
Reduction in Fuel Costs |  | 8.0 |  |
February 2021 Severe Storm Fuel Costs | Southwestern Electric Power Co [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Noncurrent Regulatory Assets |  | 253.3 | 329.0 |
February 2021 Severe Storm Fuel Costs | Southwestern Electric Power Co [Member] | Louisiana Jurisdiction [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Noncurrent Regulatory Assets |  | 97.2 | 121.7 |
February 2021 Severe Storm Fuel Costs | Southwestern Electric Power Co [Member] | Arkansas |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Noncurrent Regulatory Assets |  | $ 54.2 | 74.9 |
Remaining Recovery Period |  | 6 years |  |
February 2021 Severe Storm Fuel Costs | Southwestern Electric Power Co [Member] | Texas |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Noncurrent Regulatory Assets |  | $ 101.9 | $ 132.4 |
Approved Carrying Charge |  | 1.65% |  |
Remaining Recovery Period |  | 5 years |  |
2021 Louisiana Storm Cost Filing | Southwestern Electric Power Co [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Interim WACC |  | 3.125% |  |
Approved Deferred Storm Costs |  | $ 150.0 |  |
2022 Oklahoma Base Rate Case [Member] | Public Service Co Of Oklahoma [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Approved Return on Common Equity |  | 9.30% |  |
Amount of Increase Related to Annual Depreciation Expense |  | $ 47.0 |  |
Requested Debt Capital Structure |  | 45.40% |  |
Requested Equity Capital Structure |  | 54.60% |  |
Requested Net Increase in Oklahoma Annual Revenues |  | $ 173.0 |  |
Amount of Increase Related to Annual Amortization Expense |  | 16.0 |  |
Requested Net Increase in Oklahoma Annual Revenues Net of Rider Revenues |  | 294.0 |  |
Approved Net Increase in Oklahoma Annual Revenues |  | 131.0 |  |
Rock Falls Wind Facility Excess Benefits Rider |  | $ 21.0 |  |
2022 Oklahoma Base Rate Case [Member] | Public Service Co Of Oklahoma [Member] | Rock Falls [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
WindGenerationMWs | MW |  | 155 |  |
2022 Oklahoma Base Rate Case [Member] | Southwestern Electric Power Co [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Requested Return on Equity |  | 10.40% |  |
Minimum [Member] | 2012 Texas Base Rate Case [Member] | Southwestern Electric Power Co [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Estimated Turk AFUDC Refunds |  | $ 0.0 |  |
Maximum [Member] | 2012 Texas Base Rate Case [Member] | Southwestern Electric Power Co [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Estimated Turk AFUDC Refunds |  | $ 200.0 |  |
Subsequent Event [Member] | 2022 Oklahoma Base Rate Case [Member] | Public Service Co Of Oklahoma [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Interim Rate Over Collection Refund | $ 18.0 |  |  |
Subsequent Event [Member] | 2024 Oklahoma Base Rate Case [Member] | Public Service Co Of Oklahoma [Member] |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Requested Return on Equity | 10.80% |  |  |
Requested Debt Capital Structure | 48.90% |  |  |
Requested Equity Capital Structure | 51.10% |  |  |
Requested Net Increase in Oklahoma Annual Revenues | $ 218.0 |  |  |

X
- Definition The 2013 reversal of previously recorded regulatory disallowances. + References No definition available. + Details
Name: | aep_A2013ReversalOfPreviouslyRecordedRegulatoryDisallowances
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition AEP's share of ETT's cumulative revenues, subject to review, based upon interim rate increases received from 2009 through 2015. + References No definition available. + Details
Name: | aep_AEPShareOfETTCumulativeRevenuesSubjectToReview
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition AEP Texas cumulative revenues, subject to review, based upon interim rate increases received. + References No definition available. + Details
Name: | aep_AEPTexasCumulativeRevenuesSubjectToReview
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase in recognized expenses consisting primarily of depreciation and vegetation management + References No definition available. + Details
Name: | aep_AdditionalRecognizedExpensesConsistingPrimarilyofDepreciationandVegetationManagement
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase in revenues recognized to be surcharged to customers + References No definition available. + Details
Name: | aep_AdditionalRevenuesRecognizedtobeSurchargedtoCustomers
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of Approved Increase Related to Storm Catastrophe Reserve + References No definition available. + Details
Name: | aep_AmountOfApprovedIncreaseRelatedToStormCatastropheReserve
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of Approved Increase Related to Vegetation Management + References No definition available. + Details
Name: | aep_AmountOfApprovedIncreaseRelatedToVegetationManagement
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of Increase Related to Annual Amortization Expense + References No definition available. + Details
Name: | aep_AmountOfIncreaseRelatedToAnnualAmortizationExpense
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of requested increase related to annual depreciation expense. + References No definition available. + Details
Name: | aep_AmountOfIncreaseRelatedToAnnualDepreciationExpense
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase in approved additional vegetation management expenses + References No definition available. + Details
Name: | aep_ApprovedAdditionalVegetationManagementExpenses
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of approved annual revenue increase. + References No definition available. + Details
Name: | aep_ApprovedAnnualRevenueIncrease
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Approved Carrying Charge on a Regulatory Asset + References No definition available. + Details
Name: | aep_ApprovedCarryingCharge
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Approved Deferred Storm Costs + References No definition available. + Details
Name: | aep_ApprovedDeferredStormCosts
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Approved Net Increase in Oklahoma Annual Revenues + References No definition available. + Details
Name: | aep_ApprovedNetIncreaseInOklahomaAnnualRevenues
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Net Increase in approved Texas Annual Revenues + References No definition available. + Details
Name: | aep_ApprovedNetIncreaseinTexasAnnualRevenues
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Approved Rider to Recover Dolet Hils and Pirkey Costs + References No definition available. + Details
Name: | aep_ApprovedRiderToRecoverDoletHilsAndPirkeyCosts
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Authorized Annual Base Rate Increase + References No definition available. + Details
Name: | aep_AuthorizedAnnualBaseRateIncrease
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Estimated Reduced Annual Revenues + References No definition available. + Details
Name: | aep_EstimatedReducedAnnualRevenues
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Estimated Turk AFUDC Refunds + References No definition available. + Details
Name: | aep_EstimatedTurkAFUDCRefunds
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Impairment Charge recorded to recognize disallowed plant investments. + References No definition available. + Details
Name: | aep_ImpairmentChargeDisallowedPlantInvestments
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total impairment charge recorded as part of agreement. + References No definition available. + Details
Name: | aep_ImpairmentChargeTotal
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Impairment recorded due to lack of return on Welsh Plant Unit 2. + References No definition available. + Details
Name: | aep_ImpairmentChargeWelshPlantUnit2
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Interim Rate Over Collection Refund + References No definition available. + Details
Name: | aep_InterimRateOverCollectionRefund
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Interim Weighted Average Cost of Capital + References No definition available. + Details
Name: | aep_InterimWACC
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Parents equity ownership interest in ETT. + References No definition available. + Details
Name: | aep_ParentOwnershipInterestInETT
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Provision for Refund + References No definition available. + Details
Name: | aep_ProvisionforRefund
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reduction in Fuel Costs + References No definition available. + Details
Name: | aep_ReductionInFuelCosts
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Requested annual increase. + References No definition available. + Details
Name: | aep_RequestedAnnualIncrease
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Requested Debt Capital Structure + References No definition available. + Details
Name: | aep_RequestedDebtCapitalStructure
Namespace Prefix: | aep_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Requested Equity Capital Structure + References No definition available. + Details
Name: | aep_RequestedEquityCapitalStructure
Namespace Prefix: | aep_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount requested for net annual increase. + References No definition available. + Details
Name: | aep_RequestedNetAnnualIncrease
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Requested Net Increase in Oklahoma Annual Revenues + References No definition available. + Details
Name: | aep_RequestedNetIncreaseInOklahomaAnnualRevenues
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Requested Net Increase in Oklahoma Annual Revenues Net of Rider Revenues + References No definition available. + Details
Name: | aep_RequestedNetIncreaseInOklahomaAnnualRevenuesNetOfRiderRevenues
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Requested net increase in Texas annual revenues. + References No definition available. + Details
Name: | aep_RequestedNetIncreaseinTexasAnnualRevenues
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Requested return on equity. + References No definition available. + Details
Name: | aep_RequestedReturnOnEquity
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revised Requested Annual Increase + References No definition available. + Details
Name: | aep_RevisedRequestedAnnualIncrease
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Revised Requested Net Annual Increase + References No definition available. + Details
Name: | aep_RevisedRequestedNetAnnualIncrease
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Rock Falls Wind Facility Excess Benefits Rider + References No definition available. + Details
Name: | aep_RockFallsWindFacilityExcessBenefitsRider
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Turk AFUDC Disallowance + References No definition available. + Details
Name: | aep_TurkAFUDCDisallowance
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Wind Generation (MWs) + References No definition available. + Details
Name: | aep_WindGenerationMWs
Namespace Prefix: | aep_
Data Type: | dtr-types1:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-2 + Details
Name: | us-gaap_OtherAssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481372/852-10-55-10 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 360 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480842/942-360-50-1 + Details
Name: | us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of public utility's approved return on equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Percentage of public utility's requested return on equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortization period for the recovery of regulatory asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_RegulatoryAssetAmortizationPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481878/980-340-50-1 + Details
Name: | us-gaap_RegulatoryAssetsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=aep_AEPTexasInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_PublicServiceCoOfOklahomaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_SouthwesternElectricPowerCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_BaseRateAxis=aep_AEPTexasInterimTransmissionAndDistributionRatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_BaseRateAxis=aep_ETTInterimTransmissionRatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_BaseRateAxis=aep_A2012TexasBaseRateCaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_BaseRateAxis=aep_A2016TexasBaseRateCaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_BaseRateAxis=aep_A2020TexasBaseRateCaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_BaseRateAxis=aep_A2020LouisianaBaseRateCaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_BaseRateAxis=aep_February2021SevereStormFuelCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatutoryAccountingPracticesByJurisdictionAxis=aep_LouisianaJurisdictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatutoryAccountingPracticesByJurisdictionAxis=aep_ArkansasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatutoryAccountingPracticesByJurisdictionAxis=aep_TexasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_BaseRateAxis=aep_A2021LouisianaStormCostFilingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_BaseRateAxis=aep_A2022OklahomaBaseRateCaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_RockFallsWindFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_BaseRateAxis=aep_A2024OklahomaBaseRateCaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |