REGULATORY MATTERS - GPC Regulatory Matters (Details) - Plant Vogtle Units 3 and 4 - Georgia Power $ in Millions									6 Months Ended		12 Months Ended
	Feb. 16, 2023 USD ($)	Dec. 20, 2022 USD ($)	Oct. 04, 2022 USD ($)	Jan. 01, 2021	Jan. 01, 2020	Jan. 11, 2018 USD ($)	Jan. 01, 2018	Jan. 01, 2016	Jun. 30, 2022 USD ($) report	Jun. 30, 2021 USD ($) report	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2009 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2015
Public Utilities, General Disclosures [Line Items]
Estimated in-service capital cost																	$ 4,418
Proceeds from recovery of financing costs													$ 2,900
Project capital cost forecast						$ 7,300
Requested decrease in NCCR tariff		$ (36)
Additional construction capital costs			$ 345													$ 3,300
Payments for contractor settlement agreement						300
Amendment to estimated in-service capital cost						$ 5,680
Retail rate of return on common equity																			10.95%
Authorized ROE				5.30%	8.30%		10.00%	10.00%
Potential decrease each month, percentage													0.10%
Return on equity reduction, negative impact on earnings													$ 300	$ 270	$ 150
Increase to base capital cost forecast not seeking recovery																		$ 700
Twenty Fifth Vogtle Construction Monitoring Report
Public Utilities, General Disclosures [Line Items]
Number of approved construction monitoring reports | report										25
Approval of construction capital costs										$ 7,900
Maximum guarantee													1,700
Customer refund													$ 188
Number of additional reports reviewed | report									2
Twenty Sixth Vogtle Construction Monitoring Report
Public Utilities, General Disclosures [Line Items]
Approval of construction capital costs									$ 1,100
Scenario, Forecast
Public Utilities, General Disclosures [Line Items]
Return on equity reduction, negative impact on earnings											$ 60	$ 270
Scenario, Forecast | Twenty Fifth Vogtle Construction Monitoring Report
Public Utilities, General Disclosures [Line Items]
Approval of construction capital costs	$ 461