Regulatory Matters - GPC Nuclear Construction Regulatory Matters (Details) - Plant Vogtle Units 3 And 4 - Georgia Power $ in Millions							3 Months Ended	6 Months Ended	12 Months Ended
	Feb. 17, 2022 USD ($)	Jan. 01, 2022 USD ($)	Jan. 01, 2021	Jan. 01, 2020	Jan. 11, 2018 USD ($)	Jan. 01, 2016	Mar. 31, 2022 USD ($)	Jun. 30, 2021 USD ($) report	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2009 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2013
Public Utilities, General Disclosures [Line Items]
Estimated in-service capital cost												$ 4,418
Financing costs collected, net of tax							$ 2,800
Requested decrease in tariff		$ 78
Additional construction capital costs					$ 3,300		$ 460
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											$ 270
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	$ 584
Scenario, Forecast
Public Utilities, General Disclosures [Line Items]
Return on equity reduction, negative impact on earnings									$ 265	$ 300