STOCK COMPENSATION - Schedule of Employees Participating in Stock-Based Compensation Programs (Details)	Dec. 31, 2023 employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employees	1,401
Alabama Power
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employees	191
Georgia Power
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employees	210
Mississippi Power
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employees	42
Southern Power
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employees	40
Southern Company Gas
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of employees	193

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details