Accounting For Asset Retirement And Environmental Obligations - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Asset Retirement And Environmental Obligations [Line Items]
Increase (decrease) in asset retirement obligations	$ 6.8
North Anna [Member]
Asset Retirement And Environmental Obligations [Line Items]
North Anna's nuclear decommissioning asset retirement obligation	$ 183.2	$ 171.2
Asset retirement obligations cash flow estimates related to application for additional operating license extension	20 years