v3.25.4
Exit Activities and Asset Sales (Narrative) (Details)
$ in Millions
1 Months Ended 12 Months Ended 42 Months Ended
Sep. 30, 2025
facility
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Nov. 30, 2025
USD ($)
Feb. 17, 2026
USD ($)
Restructuring Cost and Reserve [Line Items]          
Facilities agreed to sell | facility 13        
Duration of purchase agreement 30 years        
Minimum          
Restructuring Cost and Reserve [Line Items]          
Expected duration of review 12 months        
Maximum          
Restructuring Cost and Reserve [Line Items]          
Expected duration of review 18 months        
Retention Benefits          
Restructuring Cost and Reserve [Line Items]          
Retention and severance costs   $ 7 $ 8    
Retention Benefits | D.E. Karn Generating Complex and J.H. Campbell Generating Units | Retention Incentive Program          
Restructuring Cost and Reserve [Line Items]          
Regulatory asset collection period   3 years      
Retention Benefits | J.H. Campbell Generating Units          
Restructuring Cost and Reserve [Line Items]          
Retention and severance costs       $ 48  
Retention Benefits | J.H. Campbell Generating Units | Subsequent Event          
Restructuring Cost and Reserve [Line Items]          
Expected cost         $ 4