v3.26.1
Risk Management and Hedging Activities - PAC - Not Designated as Hedging Contracts (Details) - PAC - Not Designated as Hedging - Commodity derivatives - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Regulatory Assets (Liabilities), Net, Unrealized Loss (Gain), Net, on Derivative Instruments [Roll Forward]        
Beginning balance $ 111 $ 81 $ 137 $ 97
Changes in fair value recognized in regulatory assets 21 (7) 55 3
Net gains reclassified to operating revenue 0 2 7 10
Net losses reclassified to cost of fuel and energy (30) (23) (97) (57)
Ending balance $ 102 $ 53 $ 102 $ 53