Regulatory Matters - Georgia Power (Details) - GEORGIA POWER CO $ in Millions					3 Months Ended
	Apr. 23, 2026 MW	Mar. 25, 2026 MW	Dec. 19, 2025 MW	May 14, 2025 USD ($)	Mar. 31, 2026 USD ($) MW
Public Utilities, General Disclosures [Line Items]
Capital costs | $					$ 3,700
Total certified amounts | $					$ 19,500
Approved capacity increase (in MWs)			9,885
Generating capacity petitioned for decertification		757
Robins
Public Utilities, General Disclosures [Line Items]
Nameplate capacity placed in service					128
Minimum | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Requested additional generating capacity (in MWs)	2,000
Maximum
Public Utilities, General Disclosures [Line Items]
Approved rate increase (decrease) | $				$ 200
Maximum | Subsequent Event
Public Utilities, General Disclosures [Line Items]
Requested additional generating capacity (in MWs)	6,000