v3.26.1
Risk Management and Hedging Activities - PAC - Balance Sheet Location (Details) - PAC - Commodity derivatives - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Derivatives, Fair Value [Line Items]        
Cash collateral receivable $ 65 $ 71    
Total derivatives - net basis (46) (66)    
Other current assets        
Derivatives, Fair Value [Line Items]        
Cash collateral receivable 0 0    
Total derivatives - net basis 3 5    
Other noncurrent assets        
Derivatives, Fair Value [Line Items]        
Cash collateral receivable 0 0    
Total derivatives - net basis 0 0    
Other current liabilities        
Derivatives, Fair Value [Line Items]        
Cash collateral receivable 65 67    
Total derivatives - net basis (29) (48)    
Other noncurrent liabilities        
Derivatives, Fair Value [Line Items]        
Cash collateral receivable 0 4    
Total derivatives - net basis (20) (23)    
Not Designated as Hedging        
Derivatives, Fair Value [Line Items]        
Derivative asset, gross 6 10    
Commodity derivatives (117) (147)    
Total derivative asset (liability) (111) (137)    
Net regulatory asset (liability) on derivative contracts 111 137 $ 81 $ 97
Not Designated as Hedging | Other current assets        
Derivatives, Fair Value [Line Items]        
Derivative asset, gross 3 5    
Commodity derivatives 0 0    
Total derivative asset (liability) 3 5    
Not Designated as Hedging | Other noncurrent assets        
Derivatives, Fair Value [Line Items]        
Derivative asset, gross 0 0    
Commodity derivatives 0 0    
Total derivative asset (liability) 0 0    
Not Designated as Hedging | Other current liabilities        
Derivatives, Fair Value [Line Items]        
Derivative asset, gross 3 4    
Commodity derivatives (97) (119)    
Total derivative asset (liability) (94) (115)    
Not Designated as Hedging | Other noncurrent liabilities        
Derivatives, Fair Value [Line Items]        
Derivative asset, gross 0 1    
Commodity derivatives (20) (28)    
Total derivative asset (liability) $ (20) $ (27)