XML 163 R120.htm IDEA: XBRL DOCUMENT v3.22.4
REGULATORY MATTERS - GPC Schedule of Nuclear Construction Cost and Schedule (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Commitments [Line Items]              
Total AFUDC and interest capitalized         $ 327 $ 282 $ 230
Georgia Power              
Commitments [Line Items]              
Total AFUDC and interest capitalized         213 $ 190 $ 138
Pre-tax charge to income $ 53 $ (102) $ 16 $ 440 407    
Georgia Power | Plant Vogtle Units 3 and 4              
Commitments [Line Items]              
Base project capital cost forecast 10,533       10,533    
Construction contingency estimate 60       60    
Preliminary estimated cost to complete 10,593       10,593    
Net investment (9,521)       (9,521)    
Remaining estimate to complete 1,072       1,072    
Estimated cost to complete, costs not shared with other owners 610       610    
Estimated cost to complete, construction monitoring costs approved for recovery 33       33    
Total AFUDC and interest capitalized         421    
Total AFUDC and interest capitalized, accrual amount $ 304       $ 304