v3.25.2
DERIVATIVES AND HEDGING - Narrative (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Cash collateral received from third-parties $ 95,000 $ 87,000
Cash collateral paid 15,000 3,000
Fair value of derivative liabilities subject to cross acceleration provisions 48,000 72,000
Fair value of derivative liabilities subject to cross default provisions 153,000 164,000
I&M    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Cash collateral paid 10,000 600
APCo    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Fair value of derivative liabilities subject to cross default provisions 2,000 1,000
PSO    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Fair value of derivative liabilities subject to cross default provisions 8,000 4,000
SWEPCo    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Fair value of derivative liabilities subject to cross default provisions $ 2,000 $ 2,000
Commodity    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Maximum length of time to hedge exposure to variability 10 years  
Cross acceleration provisions maximum third party obligation amount $ 50,000  
Cross default provisions maximum third party obligation amount $ 50,000