Regulatory Matters - APC Renewable Generation Certificate (Details)	Apr. 04, 2023 claim MW	Mar. 31, 2023 MW
Subsequent Event
Public Utilities, General Disclosures [Line Items]
Renewable generation certificate, number of new solar power purchase agreements | claim	2
ALABAMA POWER CO
Public Utilities, General Disclosures [Line Items]
Renewable generation certificate, authorized generating capacity (in MWs)		500
ALABAMA POWER CO | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Renewable generation certificate, additional generating capacity procured (in MWs)	160
Renewable generation certificate, generating capacity (in MWs)	490