v3.25.1
REGULATORY MATTERS (Cost Recovery Mechanisms) (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
May 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2025
Dec. 31, 2023
Dec. 31, 2022
Effective 1/1/2024-12/31/2026            
Regulatory Assets [Roll Forward]            
Energy efficiency implementation plan term         3 years  
Purchased Power and Fuel Adjustment Clause            
Public Utilities, General Disclosures [Line Items]            
Months approved rate in effect unless modified   12 months        
Regulatory Assets [Roll Forward]            
Beginning of Period   $ (49) $ 55 $ (49)    
Deferred Fuel and Purchased Power Costs   61 49      
PPFAC and Base Power Recoveries   (60) (97)      
End of Period   $ (48) $ 7   $ 55  
Renewable Energy Standard            
Regulatory Assets [Roll Forward]            
Approved spending budget $ 66          
Approved renewable energy standard increase in tariff amount $ 17          
Renewable Energy Standard | Scenario, Forecast            
Regulatory Assets [Roll Forward]            
Renewable energy target percentage       15.00%    
Energy Efficiency Standards            
Regulatory Assets [Roll Forward]            
Annual energy efficiency target, percentage           1.30%
Energy Efficiency Standards | Effective 1/1/2024-12/31/2026            
Regulatory Assets [Roll Forward]            
Approved recovery of spending budget         $ 72  
Lost Fixed Cost Recovery            
Regulatory Assets [Roll Forward]            
Cap on increase in lost fixed cost recovery rate (percentage)   2.00%