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RATE MATTERS - PSO and SWEPCo Rate Matters (Details) - North Central Wind Energy Facilities
1 Months Ended 9 Months Ended
Apr. 30, 2022
Sep. 30, 2025
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