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Jointly Owned Electric Plant (Details) - Nuclear Plant - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Quad Cities    
Schedule Of Jointly Owned Utility Plant Net Ownership [Abstract]    
Ownership interest 75.00%  
Plant in service $ 1,263 $ 1,243
Accumulated depreciation 805 761
Construction work in progress $ 8 7
Peach Bottom    
Schedule Of Jointly Owned Utility Plant Net Ownership [Abstract]    
Ownership interest 50.00%  
Plant in service $ 1,552 1,534
Accumulated depreciation 689 659
Construction work in progress $ 14 12
Salem    
Schedule Of Jointly Owned Utility Plant Net Ownership [Abstract]    
Ownership interest 42.59%  
Plant in service $ 781 772
Accumulated depreciation 357 328
Construction work in progress $ 49 23
Nine Mile Point Unit 2    
Schedule Of Jointly Owned Utility Plant Net Ownership [Abstract]    
Ownership interest 82.00%  
Plant in service $ 1,073 1,063
Accumulated depreciation 292 256
Construction work in progress $ 35 26
South Texas Project    
Schedule Of Jointly Owned Utility Plant Net Ownership [Abstract]    
Ownership interest 44.00%  
Plant in service $ 1,089 0
Accumulated depreciation 5 0
Construction work in progress $ 13 $ 0