v3.26.1
CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - PSO (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Cash Flow Hedges, Tax $ 6 $ (9) $ 2 $ (3)
PUBLIC SERVICE COMPANY OF OKLAHOMA        
Cash Flow Hedges, Tax $ 0 $ 0 $ 0 $ 0