Audit Information	12 Months Ended
	Dec. 31, 2023
Auditor [Line Items]
Auditor Name	Deloitte & Touche LLP
Auditor Firm ID	34
Auditor Location	Atlanta, Georgia
Alabama Power
Auditor [Line Items]
Auditor Name	Deloitte & Touche LLP
Auditor Firm ID	34
Auditor Location	Birmingham, Alabama
Georgia Power
Auditor [Line Items]
Auditor Name	Deloitte & Touche LLP
Auditor Firm ID	34
Auditor Location	Atlanta, Georgia
Mississippi Power
Auditor [Line Items]
Auditor Name	Deloitte & Touche LLP
Auditor Firm ID	34
Auditor Location	Atlanta, Georgia
Southern Power
Auditor [Line Items]
Auditor Name	Deloitte & Touche LLP
Auditor Firm ID	34
Auditor Location	Atlanta, Georgia
Southern Company Gas
Auditor [Line Items]
Auditor Name	Deloitte & Touche LLP
Auditor Firm ID	34
Auditor Location	Atlanta, Georgia
Southern Natural Gas Company, LLC
Auditor [Line Items]
Auditor Name	BDO USA, P.C.
Auditor Firm ID	243
Auditor Location	Houston, Texas