REGULATORY MATTERS - Georgia Power (Details) - GEORGIA POWER CO - USD ($)		4 Months Ended	6 Months Ended
	May 28, 2020	Sep. 30, 2020	Jun. 30, 2020
Public Utilities, General Disclosures [Line Items]
Incremental COVID-19 costs deferred			$ 34,000,000
Requested decrease in fuel billings	$ 740,000,000
Requested decrease in fuel billings, term	2 years
Adjustment to fuel cost recovery rate if under recovered fuel balance exceeds budget thereafter			$ 200,000,000
Scenario, Forecast
Public Utilities, General Disclosures [Line Items]
Requested decrease in fuel billings		$ 44,000,000