Vogtle Units No. 3 and No. 4 Construction Project - Project Budget and Actual Costs (Details) - Vogtle Units No. 3 & No. 4 $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Actual Costs at June 30, 2022
Proceeds from guarantee agreement	$ 1,100
Cost sharing benefits	99
Jointly Owned Nuclear Power Plant
Project Budget (Tender)
Construction Costs	6,021
Financing Costs	1,966
Subtotal	7,987
Deferred Training Costs	54
Total Project Costs Before Contingency	8,041
Oglethorpe-Level Contingency	59
Total Contingency	59
Totals	8,100
Actual Costs at June 30, 2022
Construction Costs	5,842
Financing Costs	1,626
Subtotal	7,468
Deferred Training Costs	46
Total Project Costs Before Contingency	7,514
Oglethorpe-Level Contingency	0
Total Contingency	0
Totals	$ 7,514