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Basis of Presentation (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) shares retail_customers | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Basis of Presentation [Abstract] |  |  |
Number of Retail Customers | retail_customers | 934,000 |  |
Entity Number of Employees | 2,842 |  |
Number of Union Employees Subject to Agreement B | 65 |  |
Public Utilities, Allowance for Funds Used During Construction, Capitalized Interest | $ | $ 13 | $ 7 | $ 8
Number of Union Employees | 661 |  |
Interest Income, Interest-Earning Asset | $ | $ 19 | $ 8 | $ 6

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