Regulatory Matters - GPC Nuclear Construction (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Loss Contingencies [Line Items]
Credit on plant vogtle units 3 and 4	$ 21	$ 0	$ 21	$ 0
GEORGIA POWER CO
Loss Contingencies [Line Items]
Credit on plant vogtle units 3 and 4	21	$ 0	21	$ 0
After tax credit on plant vogtle units 3 and 4	16
GEORGIA POWER CO | Plant Vogtle Units 3 And 4
Loss Contingencies [Line Items]
Estimated cost to complete, construction contingency estimate, financing costs	3,530		3,530
Costs recovered to date	$ 3,080		$ 3,080