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FINANCING ACTIVITIES - Dividend Restrictions Narrative (Details) | 9 Months Ended
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Sep. 30, 2025
Dividends Payable [Line Items] |
Maximum percentage debt to capitalization | 67.50%
I&M |
Dividends Payable [Line Items] |
Maximum percentage debt to capitalization | 67.50%
AEP Texas |
Dividends Payable [Line Items] |
Maximum percentage debt to capitalization | 67.50%
APCo |
Dividends Payable [Line Items] |
Maximum percentage debt to capitalization | 67.50%
SWEPCo |
Dividends Payable [Line Items] |
Maximum percentage debt to capitalization | 67.50%
PSO |
Dividends Payable [Line Items] |
Maximum percentage debt to capitalization | 67.50%
AEPTCo |
Dividends Payable [Line Items] |
Maximum percentage debt to capitalization | 67.50%

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