Government Assistance (Details) - USD ($) $ in Millions	1 Months Ended			6 Months Ended
	Jun. 30, 2025	May 31, 2025	Jan. 31, 2025	Jun. 30, 2025	Jul. 31, 2025	Dec. 31, 2024
Government Assistance [Line Items]
Other noncurrent assets	$ 1,504			$ 1,504		$ 1,191
Transferable Nuclear Production Tax Credit Revenues
Government Assistance [Line Items]
PTC sold under agreements	$ 90	$ 90	$ 200	290
PTC sold under agreements, cash proceeds				$ 191
Transferable Nuclear Production Tax Credit Revenues | Subsequent Event
Government Assistance [Line Items]
Other noncurrent assets					$ 86