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Regulatory Matters - APC Plant Greene County (Details)
$ in Millions
1 Months Ended
May 08, 2024
$ / KWH_Kilowatt_hour
Jan. 31, 2026
$ / KWH_Kilowatt_hour
Jul. 31, 2024
USD ($)
$ / KWH_Kilowatt_hour
Apr. 26, 2024
MW
MISSISSIPPI POWER CO | Plant Greene County Units 1 and 2        
Public Utilities, General Disclosures [Line Items]        
Proportionate ownership share       40.00%
Required fossil-stream generation retirements (in MWs) | MW       206
ALABAMA POWER CO        
Public Utilities, General Disclosures [Line Items]        
Current billing rates under rate ECR (usd per KWH) 0.03270      
ALABAMA POWER CO | Scenario, Forecast        
Public Utilities, General Disclosures [Line Items]        
Current billing rates under rate ECR (usd per KWH)   0.05910    
ALABAMA POWER CO | Subsequent Event        
Public Utilities, General Disclosures [Line Items]        
Current billing rates under rate ECR (usd per KWH)     0.03015  
Current billing rates under rate ECR, amount | $     $ 135  
ALABAMA POWER CO | Plant Greene County Units 1 and 2        
Public Utilities, General Disclosures [Line Items]        
Proportionate ownership share       60.00%
Required fossil-stream generation retirements (in MWs) | MW       300