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FINANCING ACTIVITIES - Schedule of Direct Borrowing Activity (Details) - Direct Borrowing $ in Millions | 3 Months Ended
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Mar. 31, 2025 USD ($)
AEPTCo |
Short-Term Debt [Line Items] |
Maximum Borrowings | $ 13.7
Maximum Loans | 80.3
Average Borrowings | 9.5
Average Loans | 26.1
Borrowings | 0.0
Loans | 49.4
Authorized Short-term Borrowing Limit | 0.0
SWTCo |
Short-Term Debt [Line Items] |
Maximum Borrowings | 1.8
Maximum Loans | 0.0
Average Borrowings | 1.8
Average Loans | 0.0
Borrowings | 1.8
Loans | 0.0
Authorized Short-term Borrowing Limit | 50.0
Midwest Transmission Holdings |
Short-Term Debt [Line Items] |
Maximum Borrowings | 0.0
Maximum Loans | 32.6
Average Borrowings | 0.0
Average Loans | 30.9
Borrowings | 0.0
Loans | 3.5
Authorized Short-term Borrowing Limit | $ 0.0

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- Definition Authorized Short-term Borrowing Limit by regulatory orders. + References No definition available. + Details
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Period Type: | duration

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

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

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- Definition Borrowings from Parent at period end. Parent 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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Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
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- Definition Loans to Parent at period end. Parent 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 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. + References No definition available. + Details
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Namespace Prefix: | aep_
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Balance Type: | credit
Period Type: | duration

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- Definition 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. + References No definition available. + Details
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Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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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- Details
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- Details
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- Details
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Period Type: |