REGULATORY MATTERS - APC Rate CNP New Plant (Details) - Alabama Power $ in Millions |
1 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2023
USD ($)
|
Dec. 31, 2020
MW
|
Dec. 01, 2023
USD ($)
|
Oct. 03, 2022
USD ($)
|
|
| Public Utilities, General Disclosures [Line Items] | ||||
| Increase to annual revenue requirement | $ 91 | $ 34 | ||
| Increase to annual revenue requirement, percentage | 1.40% | 0.60% | ||
| Requested rate increase (decrease), amount | $ 78 | |||
| Requested rate increase (decrease), percentage | 1.10% | |||
| Plant Barry Unit 8 | ||||
| Public Utilities, General Disclosures [Line Items] | ||||
| Approximate Nameplate Capacity (MW) | MW | 720 |