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CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - PSO - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
OTHER COMPREHENSIVE LOSS, NET OF TAXES        
Cash Flow Hedges, Net of Tax $ 22 $ (33) $ 7 $ (10)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS 736 1,193 1,596 2,017
PUBLIC SERVICE COMPANY OF OKLAHOMA        
Net Income 54 63 69 91
OTHER COMPREHENSIVE LOSS, NET OF TAXES        
Cash Flow Hedges, Net of Tax 0 0 0 (1)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS $ 54 $ 63 $ 69 $ 90