RATE MATTERS - PSO and SWEPCo Rate Matters (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2022	Mar. 31, 2026
Independence Energy Connection Project
Public Utilities, General Disclosures [Line Items]
Aep share of independence energy connection capital costs		$ 96
North Central Wind Energy Facilities
Public Utilities, General Disclosures [Line Items]
Net capacity factor guarantee, measurement period started		5 years
Net capacity factor guarantee, full period under coverage		30 years
Net capacity factor guarantee, measurement period, first start period	5 years