RATE MATTERS - Regulated Generating Units (Details) - SWEPCo - USD ($) $ in Millions	1 Months Ended
	Oct. 29, 2025	Aug. 31, 2025	Sep. 30, 2025
Pirkey Plant
Public Utilities, General Disclosures [Line Items]
Public utilities, remaining net book recovery period		20 years
Pirkey Plant | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Public utilities, remaining net book recovery period	20 years
Pirkey Generating Station (Unit No. 1) | Texas
Public Utilities, General Disclosures [Line Items]
Net Book Value			$ 117