v3.25.0.1
REGULATORY MATTERS - GPC Transmission Asset Sales, Fuel Cost, and Storm Damage Recovery (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended 24 Months Ended
Apr. 24, 2024
Jan. 01, 2023
Sep. 30, 2024
May 31, 2023
Jun. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2022
Mar. 07, 2024
Public Utilities, General Disclosures [Line Items]                    
To be recovered amount       $ 2,200            
Regulatory liabilities           $ 705        
Regulatory asset             $ 66 $ 216 $ 216  
Public utilities, property, plant and equipment, net           104,689 99,844      
Deferred amount to be billed in 2025           476 533      
Other operations and maintenance           6,539 6,093 6,824    
Major storms                    
Public Utilities, General Disclosures [Line Items]                    
Storm damage reserves               239    
Georgia Power                    
Public Utilities, General Disclosures [Line Items]                    
Requested rate increase (decrease), amount       $ 1,100       14,000    
Requested rate increase (decrease), percentage       54.00%            
Recovery period       3 years            
Over (under) recovered fuel balance           $ (1,200) (1,900)      
Required period for options and hedges           36 months        
Storm damage reserves   $ 31             213  
Regulatory liabilities           $ 827 54      
Regulatory asset               83 $ 83  
Public utilities, property, plant and equipment, net           44,038 40,995      
Deferred amount to be billed in 2025           262 305      
Other operations and maintenance           2,372 2,083 2,349    
Georgia Power | Major storms                    
Public Utilities, General Disclosures [Line Items]                    
Storm damage reserves               $ 213    
Weather related damages     $ 870              
Regulatory asset           750        
Public utilities, property, plant and equipment, net           90        
Deferred amount to be billed in 2025           30        
Georgia Power | Under Recovered Fuel Clause Revenues                    
Public Utilities, General Disclosures [Line Items]                    
Over (under) recovered fuel balance           (713) (694)      
Georgia Power | Deferred Under Recovered Fuel Clause Revenues                    
Public Utilities, General Disclosures [Line Items]                    
Over (under) recovered fuel balance           (453) (1,200)      
Georgia Power | Other regulatory assets, current                    
Public Utilities, General Disclosures [Line Items]                    
Regulatory liabilities           31 31      
Georgia Power | Other Regulatory Assets                    
Public Utilities, General Disclosures [Line Items]                    
Regulatory liabilities           $ 795 $ 23      
Georgia Power | Maximum                    
Public Utilities, General Disclosures [Line Items]                    
Approved rate increase, percent       40.00%            
Public utilities, approved rate increase (decrease), amount       $ 200            
Southern Company And Georgia Power | Disposal Group, Held-for-sale, Not Discontinued Operations                    
Public Utilities, General Disclosures [Line Items]                    
Net book value                   $ 236
Purchase price $ 351                  
Gain on sale         $ 114          
Gain on sale, after tax         $ 84