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Revenue Recognition (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Disaggregation of Revenue [Line Items]        
Subtotal $ 683 $ 639 $ 1,490 $ 1,389
Alternative revenue programs, net of amortization 9 (3) 5 (14)
Other Cost of Operating Revenue 6      
Other accrued (deferred) revenues, net   4 10 5
Total retail revenues 698 640 1,505 1,380
Wholesale revenues 88 99 188 275
Other operating revenue 21 19 42 32
Total revenues 807 758 1,735 1,687
Gain on Derivative Instruments, Pretax 30 32 80 120
Residential [Member]        
Disaggregation of Revenue [Line Items]        
Subtotal 311 307 740 722
Commercial [Member]        
Disaggregation of Revenue [Line Items]        
Subtotal 234 219 476 446
Industrial [Member]        
Disaggregation of Revenue [Line Items]        
Subtotal 128 104 255 206
Direct Access customers [Member]        
Disaggregation of Revenue [Line Items]        
Subtotal $ 10 $ 9 $ 19 $ 15