RATE MATTERS - FERC Rate Matters (Details) - USD ($) $ in Millions	1 Months Ended
Oct. 31, 2023	Mar. 31, 2025
Independence Energy Connection Project
Public Utilities, General Disclosures [Line Items]
Aep share of independence energy connection capital costs		$ 97
Request to Update SWEPCo Generation Depreciation Rates
Public Utilities, General Disclosures [Line Items]
Requested annual revenue requirement	$ 5

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