PROPERTY, PLANT, AND EQUIPMENT - Composite Straight-Line Rates (Details) - Utility plant in service |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Alabama Power | |||
| Property, Plant and Equipment [Line Items] | |||
| Composite rate | 4.20% | 4.10% | 2.70% |
| Georgia Power | |||
| Property, Plant and Equipment [Line Items] | |||
| Composite rate | 3.40% | 3.80% | 3.30% |
| Mississippi Power | |||
| Property, Plant and Equipment [Line Items] | |||
| Composite rate | 3.30% | 3.40% | 3.40% |
| Southern Company Gas | |||
| Property, Plant and Equipment [Line Items] | |||
| Composite rate | 2.90% | 2.70% | 2.70% |