v3.25.2
RATE MATTERS - FERC Rate Matters (Details)
$ in Millions
1 Months Ended
Oct. 31, 2023
USD ($)
Jun. 30, 2025
USD ($)
order
Public Utilities, General Disclosures [Line Items]    
Number of order FERC issues | order   2
Independence Energy Connection Project    
Public Utilities, General Disclosures [Line Items]    
Aep share of independence energy connection capital costs   $ 91
Request to Update SWEPCo Generation Depreciation Rates    
Public Utilities, General Disclosures [Line Items]    
Requested annual revenue requirement $ 5