FINANCING ACTIVITIES - Schedule of Direct Borrowing Activity (Details) - Direct Borrowing $ in Millions |
6 Months Ended |
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Jun. 30, 2026
USD ($)
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| AEP TRANSMISSION COMPANY, LLC | |
| Short-Term Debt [Line Items] | |
| Maximum Borrowings | $ 0 |
| Maximum Loans | 578 |
| Average Borrowings | 0 |
| Average Loans | 144 |
| Borrowings | 0 |
| Loans | 156 |
| Authorized Short-term Borrowing Limit | 0 |
| SWTCo | |
| Short-Term Debt [Line Items] | |
| Maximum Borrowings | 2 |
| Maximum Loans | 0 |
| Average Borrowings | 2 |
| Average Loans | 0 |
| Borrowings | 2 |
| Loans | 0 |
| Authorized Short-term Borrowing Limit | $ 50 |
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- Definition Authorized Short-term Borrowing Limit by regulatory orders. No definition available.
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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. No definition available.
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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. No definition available.
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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. No definition available.
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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. No definition available.
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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. No definition available.
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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. No definition available.
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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