REGULATORY MATTERS - Alabama Power (Details) - ALABAMA POWER CO $ in Millions |
Jun. 09, 2020
USD ($)
MW
|
|---|---|
| Public Utilities, General Disclosures [Line Items] | |
| Approved additional generating capacity, purchases (in MWs) | 240 |
| Approved additional generating capacity, demand-side management and distributed energy resource programs (in MWs) | 200 |
| Additional generating capacity (in MWs) | 400 |
| Plant Barry Unit 8 | |
| Public Utilities, General Disclosures [Line Items] | |
| Approved additional generating capacity, construction (in MWs) | 720 |
| Costs incurred, percentage of estimated in-service costs | 5.00% |
| Estimated in-service cost | $ | $ 652 |