Regulatory Matters - GPC Nuclear Construction Regulatory Matters (Details) - Plant Vogtle Units 3 And 4 - GEORGIA POWER CO $ in Millions							6 Months Ended		12 Months Ended				12003 Months Ended
	Feb. 16, 2023 USD ($)	Jan. 01, 2023 USD ($)	Jan. 01, 2021	Jan. 01, 2020	Jan. 11, 2018 USD ($)	Jan. 01, 2016	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($) claim	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2009 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2021 report	Jun. 30, 2018 USD ($)	Dec. 31, 2013
Public Utilities, General Disclosures [Line Items]
Estimated in-service capital cost												$ 4,418
Financing costs collected, net of tax							$ 3,000
Increase in tariff		$ 36
Additional construction capital costs					$ 3,300								$ 345
Payments for contractor settlement agreement					300
Amendment to estimated in-service capital cost					$ 5,680
Retail rate of return on common equity																10.95%
Public utilities, approved return on equity percentage			5.30%	8.30%		10.00%
Public utilities, approved return on equity, monthly percentage decrease							0.10%
Return on equity reduction, negative impact on earnings											$ 300
Increase to base capital cost forecast not seeking recovery															$ 700
Twenty Fourth Vogtle Construction Monitoring Report
Public Utilities, General Disclosures [Line Items]
Cost settlement agreement revised forecast, net of payments							$ 7,300
Twenty Fifth Vogtle Construction Monitoring Report
Public Utilities, General Disclosures [Line Items]
Number of approved construction management reports | report														25
Requested capital construction costs							7,900
Guarantor obligations							1,700
Customer refund							188
Twenty Sixth Vogtle Construction Monitoring Report
Public Utilities, General Disclosures [Line Items]
Requested capital construction costs								$ 1,100
Number of additional reports reviewed | claim								2
Twenty Seventh Vogtle Construction Monitoring Report
Public Utilities, General Disclosures [Line Items]
Requested capital construction costs	$ 461
Twenty Ninth Vogtle Construction Monitoring Report
Public Utilities, General Disclosures [Line Items]
Requested capital construction costs							$ 390
Scenario, Forecast
Public Utilities, General Disclosures [Line Items]
Return on equity reduction, negative impact on earnings									$ 60	$ 290