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FINANCING ACTIVITIES - Schedule of Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool (Details) - Utility | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
SOUTHWESTERN ELECTRIC POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Maximum Interest Rate | 5.79% | 5.81% | 5.28%
Minimum Interest Rate | 4.74% | 4.66% | 0.10%
OHIO POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Maximum Interest Rate | 5.79% | 5.81% | 5.28%
Minimum Interest Rate | 4.74% | 4.66% | 0.10%
INDIANA MICHIGAN POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Maximum Interest Rate | 5.79% | 5.81% | 5.28%
Minimum Interest Rate | 4.74% | 4.66% | 0.10%
AEP TEXAS INC. |  |  |
Short-Term Debt [Line Items] |  |  |
Maximum Interest Rate | 5.79% | 5.81% | 5.28%
Minimum Interest Rate | 4.74% | 4.66% | 0.10%
APPALACHIAN POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Maximum Interest Rate | 5.79% | 5.81% | 5.28%
Minimum Interest Rate | 4.74% | 4.66% | 0.10%
PUBLIC SERVICE COMPANY OF OKLAHOMA |  |  |
Short-Term Debt [Line Items] |  |  |
Maximum Interest Rate | 5.79% | 5.81% | 5.28%
Minimum Interest Rate | 4.74% | 4.66% | 0.10%
AEP TRANSMISSION COMPANY, LLC |  |  |
Short-Term Debt [Line Items] |  |  |
Maximum Interest Rate | 5.79% | 5.81% | 5.28%
Minimum Interest Rate | 4.74% | 4.66% | 0.10%

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- Definition 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. + References No definition available. + Details
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Period Type: | duration

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- Definition 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. + References No definition available. + Details
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- 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
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- Details
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Period Type: |

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

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

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- Details
Name: | dei_LegalEntityAxis=aep_IndianaMichiganPowerCompanyMember
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- Details
Name: | dei_LegalEntityAxis=aep_AEPTexasInc.Member
Namespace Prefix: |
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- Details
Name: | dei_LegalEntityAxis=aep_AppalachianPowerCompanyMember
Namespace Prefix: |
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- Details
Name: | dei_LegalEntityAxis=aep_PublicServiceCompanyOfOklahomaMember
Namespace Prefix: |
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- Details
Name: | dei_LegalEntityAxis=aep_AEPTransmissionCompanyLLCMember
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Period Type: |