Subsequent Events (Details) $ in Thousands	Aug. 14, 2024 USD ($) MW	Jun. 07, 2024 USD ($)
Litigation Nuclear Fuel Disposal Cost January 1, 2011 Through December 31, 2014 | Settled Litigation | Plant Hatch And Plant Vogtle
Subsequent Event [Line Items]
Litigation settlement, amount awarded from other party		$ 39,000
Litigation Nuclear Fuel Disposal Cost January 1, 2011 Through December 31, 2014 | Settled Litigation | Plant Hatch And Plant Vogtle | Minimum
Subsequent Event [Line Items]
Expected payment period		30 days
Litigation Nuclear Fuel Disposal Cost January 1, 2011 Through December 31, 2014 | Settled Litigation | Plant Hatch And Plant Vogtle | Maximum
Subsequent Event [Line Items]
Expected payment period		60 days
Subsequent Event | Southern Natural Gas Company, LLC
Subsequent Event [Line Items]
Generating unit, megawatts | MW	1,200
Base terms	20 years
Total fixed charges	$ 1,901,000