Regulatory Matters - APC Renewable Generation Certificate (Details)	Jun. 14, 2023 MW	Jun. 13, 2023 MW	Apr. 04, 2023 claim MW
Public Utilities, General Disclosures [Line Items]
Renewable generation certificate, number of new solar power purchase agreements (in claims) | claim			2
ALABAMA POWER CO
Public Utilities, General Disclosures [Line Items]
Renewable generation certificate, additional generating capacity procured (in MWs)			160
Renewable generation certificate, generating capacity (in MWs)			490
Renewable generation certificate, authorized generating capacity (in MWs)			500
Renewable generation certificate, additional renewable capacity (in MWs)	2,400
Renewable generation certificate, size of allowable projects (in MWs)	200	80
Renewable generation certificate, annual approval limit (in MWs)	400	160