v3.26.3
CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - PSO (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Cash Flow Hedges, Tax $ 1 $ (4) $ 3 $ (7)
PUBLIC SERVICE COMPANY OF OKLAHOMA        
Cash Flow Hedges, Tax $ 0 $ 0 $ 0 $ 0