Regulatory Matters - GPC Nuclear Construction Cost and Schedule (Details) - GEORGIA POWER CO - Plant Vogtle Units 3 And 4 $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Loss Contingencies [Line Items]
Total project capital cost forecast	$ 10,753
Net investment as of end of the period	(10,608)
Remaining estimate to complete	145
Estimated cost to complete, costs not shared with other owners	610
Estimated cost to complete, construction monitoring costs approved for recovery	33
Pre-tax charge to income	567
Expected capitalized costs	440
Capitalized interest accrued	435
Twenty Fifth Vogtle Construction Monitoring Report
Loss Contingencies [Line Items]
Guarantor obligations	1,700
Customer refund	$ 188