REGULATORY MATTERS - GPC Regulatory Matters (Details) - USD ($) $ in Millions								1 Months Ended	6 Months Ended	12 Months Ended
	Mar. 24, 2024	Oct. 17, 2023	Oct. 05, 2023	Jan. 01, 2021	Jan. 01, 2020	Jan. 01, 2018	Jan. 01, 2016	Dec. 31, 2022	Jun. 30, 2021	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2009	Jan. 31, 2018	Dec. 31, 2016
Public Utilities, General Disclosures [Line Items]
Net regulatory assets								$ 5,833			$ 6,523	$ 5,833
Deferred Income Tax Charges
Public Utilities, General Disclosures [Line Items]
Net regulatory assets								866			897	866
Georgia Power
Public Utilities, General Disclosures [Line Items]
Net regulatory assets								4,663			5,090	4,663
Georgia Power | Deferred Income Tax Charges
Public Utilities, General Disclosures [Line Items]
Net regulatory assets								583			605	583
Plant Vogtle Units 3 and 4 | Georgia Power
Public Utilities, General Disclosures [Line Items]
Estimated in-service capital cost														$ 4,418
Proceeds from recovery of financing costs											$ 3,000
Project capital cost forecast															$ 7,300
Requested decrease in NCCR tariff								$ (36)
Additional construction capital costs		$ 17	$ 308
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											$ 310	$ 300	$ 270
Plant Vogtle Units 3 and 4 | Georgia Power | Deferred Income Tax Charge, Debt Component
Public Utilities, General Disclosures [Line Items]
Net regulatory assets											14
Plant Vogtle Units 3 and 4 | Georgia Power | Deferred Income Tax Charges
Public Utilities, General Disclosures [Line Items]
Net regulatory assets											17
Plant Vogtle Units 3 and 4 | Georgia Power | Deferred Income Tax Charge, Equity Component
Public Utilities, General Disclosures [Line Items]
Net regulatory assets											$ 23
Plant Vogtle Units 3 and 4 | Georgia Power | Twenty Fifth Vogtle Construction Monitoring Report
Public Utilities, General Disclosures [Line Items]
Maximum guarantee									$ 1,700
Customer refund									$ 188
Plant Vogtle Units 3 and 4 | Georgia Power | Scenario, Forecast
Public Utilities, General Disclosures [Line Items]
Return on equity reduction, negative impact on earnings	$ 30									$ 90