XML 110 R82.htm IDEA: XBRL DOCUMENT v3.24.3
Regulatory Matters - GPC Rate Plans and Integrated Resource Plan (Details)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 27, 2024
MW
Apr. 24, 2024
USD ($)
Apr. 16, 2024
MW
Jan. 12, 2024
turbine
MW
Sep. 30, 2024
USD ($)
Sep. 30, 2024
USD ($)
facility
MW
Sep. 30, 2024
USD ($)
Dec. 31, 2028
MW
Dec. 31, 2025
MW
Oct. 01, 2024
USD ($)
Mar. 07, 2024
USD ($)
Dec. 31, 2023
USD ($)
Public Utilities, General Disclosures [Line Items]                        
Regulatory asset balance related to storm damage                       $ 66
GEORGIA POWER CO                        
Public Utilities, General Disclosures [Line Items]                        
Requested additional generating capacity (in MWs) | MW 1,258         265            
Number of turbines | turbine       3                
Number of battery energy storage facilities | facility           4            
Damage costs recovered annually             $ 31          
Weather-related damages         $ 1,100              
Regulatory asset balance related to storm damage         $ 1,200 $ 1,200 $ 1,200          
GEORGIA POWER CO | Traditional Base | Subsequent Event                        
Public Utilities, General Disclosures [Line Items]                        
Requested rate increase (decrease), amount, due in next fiscal year                   $ 194    
GEORGIA POWER CO | Traditional Base, Georgia State | Subsequent Event                        
Public Utilities, General Disclosures [Line Items]                        
Requested rate increase (decrease), amount, due in next fiscal year                   122    
GEORGIA POWER CO | Environmental Compliance Cost Recovery, Traditional | Subsequent Event                        
Public Utilities, General Disclosures [Line Items]                        
Requested rate increase (decrease), amount, due in next fiscal year                   126    
GEORGIA POWER CO | Demand Side-Management | Subsequent Event                        
Public Utilities, General Disclosures [Line Items]                        
Requested rate increase (decrease), amount, due in next fiscal year                   (22)    
GEORGIA POWER CO | Municipal Franchise Fee | Subsequent Event                        
Public Utilities, General Disclosures [Line Items]                        
Requested rate increase (decrease), amount, due in next fiscal year                   $ 9    
GEORGIA POWER CO | Scenario, Forecast                        
Public Utilities, General Disclosures [Line Items]                        
Requested additional generating capacity (in MWs) | MW               228 380      
GEORGIA POWER CO | Maximum                        
Public Utilities, General Disclosures [Line Items]                        
Requested additional generating capacity (in MWs) | MW     500     500            
GEORGIA POWER CO | Plant Yates | Maximum                        
Public Utilities, General Disclosures [Line Items]                        
Requested additional generating capacity (in MWs) | MW     1,400 442                
GEORGIA POWER CO | Affiliate PPA                        
Public Utilities, General Disclosures [Line Items]                        
Requested additional generating capacity (in MWs) | MW     750                  
GEORGIA POWER CO | Non-Affiliate PPA                        
Public Utilities, General Disclosures [Line Items]                        
Requested additional generating capacity (in MWs) | MW     230                  
Southern Co and Georgia Power | Disposal Group, Held-for-sale, Not Discontinued Operations                        
Public Utilities, General Disclosures [Line Items]                        
Assets held for sale                     $ 236  
Proceeds from sale of transmission assets   $ 351                    
Gain (loss) on sale           $ 114            
Gain (loss) on sale, after tax           $ 84