v3.25.0.1
FINANCING - DOE Loan Guarantee Borrowings (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2019
Dec. 31, 2021
Debt Instrument [Line Items]          
Remaining borrowing capacity $ 7,891,000,000        
Line of credit facility, maximum borrowing capacity 7,920,000,000        
Georgia Power          
Debt Instrument [Line Items]          
Remaining borrowing capacity 2,026,000,000        
Principal amortization payments 86,000,000 $ 86,000,000 $ 88,000,000    
Line of credit facility, maximum borrowing capacity $ 2,050,000,000        
Basis spread on variable rate 0.375%        
Amortization period 5 years        
FFB Credit Facility | Georgia Power          
Debt Instrument [Line Items]          
Eligible project costs to be reimbursed       $ 5,130,000,000  
Remaining borrowing capacity         $ 0
Principal amortization payments $ 86,000,000        
Line of credit facility, maximum borrowing capacity $ 4,700,000,000 $ 4,800,000,000