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Basis of Presentation (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
shares
retail_customers
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Basis of Presentation [Abstract]      
Number of Retail Customers | retail_customers 950,000    
Entity Number of Employees | shares 2,915    
Number of Union Employees Subject to Agreement B | shares 66    
Public Utilities, Allowance for Funds Used During Construction, Capitalized Interest $ 15 $ 13 $ 7
Number of Union Employees | shares 648    
Interest Income, Interest-Earning Asset   16 19
Investment Income, Net   8 4
Other Nonoperating Income   $ 2  
Gain (Loss) on Contract Termination     $ 11