DERIVATIVES - Energy-Related Derivative Contracts (Details) - Energy-related, Natural Gas MMBTU in Millions |
Dec. 31, 2024
MMBTU
|
|---|---|
| Derivative [Line Items] | |
| Net Purchased mmBtu | 431.0 |
| Alabama Power | |
| Derivative [Line Items] | |
| Net Purchased mmBtu | 123.0 |
| Georgia Power | |
| Derivative [Line Items] | |
| Net Purchased mmBtu | 116.0 |
| Mississippi Power | |
| Derivative [Line Items] | |
| Net Purchased mmBtu | 103.0 |
| Southern Power | |
| Derivative [Line Items] | |
| Net Purchased mmBtu | 6.0 |
| Southern Company Gas | |
| Derivative [Line Items] | |
| Net Purchased mmBtu | 83.0 |
| Long | Not Designated as Hedging Instrument | Southern Company Gas | |
| Derivative [Line Items] | |
| Derivative nonmonetary notional amount net long short position volume | 90.0 |
| Short | Not Designated as Hedging Instrument | Southern Company Gas | |
| Derivative [Line Items] | |
| Derivative nonmonetary notional amount net long short position volume | 7.0 |