Regulatory Matters - GPC Other Construction (Details) - GEORGIA POWER CO $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($) MW	Jul. 30, 2025 MW
Public Utilities, General Disclosures [Line Items]
Capital costs | $	$ 1,500
Total certified amounts | $	2,800
Approximate nameplate capacity		260
July 2025 Requested For Certification
Public Utilities, General Disclosures [Line Items]
Capital costs | $	$ 725
McGrau Ford
Public Utilities, General Disclosures [Line Items]
Approximate nameplate capacity	265
Plant Yates Units 8 And 10
Public Utilities, General Disclosures [Line Items]
Approximate nameplate capacity	1,326
Various Facilities
Public Utilities, General Disclosures [Line Items]
Approximate nameplate capacity	500