Regulatory Matters - GPC Nuclear Construction Cost Schedule (Details) - GEORGIA POWER CO - Plant Vogtle Units 3 And 4 $ in Millions	6 Months Ended
	Jun. 30, 2025 USD ($)
Loss Contingencies [Line Items]
Total project capital cost forecast	$ 10,732
Net investment as of end of the period	(10,690)
Remaining estimate to complete	42
Estimated cost to complete, costs not shared with other owners	1,200
Capitalized interest accrued	440
Twenty Fifth Vogtle Construction Monitoring Report
Loss Contingencies [Line Items]
Guarantor obligations	1,700
Customer refund	$ 188