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Consolidated Statement of Changes in Equity - USD ($)
$ in Millions
Total
Undistributed Earnings (Deficit)
Accumulated Other Comprehensive Income (Loss), net
Noncontrolling Interests
Constellation Energy Generation, LLC
Constellation Energy Generation, LLC
Membership Interest
Constellation Energy Generation, LLC
Undistributed Earnings (Deficit)
Constellation Energy Generation, LLC
Accumulated Other Comprehensive Income (Loss), net
Constellation Energy Generation, LLC
Noncontrolling Interests
Beginning Balance at Dec. 31, 2022         $ 11,414 $ 12,408 $ 412 $ (1,760) $ 354
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income (loss) $ 102 $ 96   $ 6 102   96   6
Changes in equity of noncontrolling interests (2)     (2) (2)       (2)
Distributions to member         (249) (152) (97)    
Other comprehensive income (loss), net of income taxes (48)   $ (48)   (48)     (48)  
Ending Balance at Mar. 31, 2023         11,217 12,256 411 (1,808) 358
Beginning Balance at Dec. 31, 2022         11,414 12,408 412 (1,760) 354
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income (loss) 1,616       1,616        
Other comprehensive income (loss), net of income taxes (37)       (37)        
Ending Balance at Sep. 30, 2023         12,108 11,778 1,793 (1,797) 334
Beginning Balance at Mar. 31, 2023         11,217 12,256 411 (1,808) 358
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income (loss) 824 833   (9) 824   833   (9)
Changes in equity of noncontrolling interests 7     7 7       7
Distributions to member         (335) (244) (91)    
Other comprehensive income (loss), net of income taxes 8   8   8     8  
Ending Balance at Jun. 30, 2023         11,721 12,012 1,153 (1,800) 356
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income (loss) 690 731   (41) 690   731   (41)
Changes in equity of noncontrolling interests 19     19 19       19
Distributions to member         (325) (234) (91)    
Other comprehensive income (loss), net of income taxes 3   3   3     3  
Ending Balance at Sep. 30, 2023         12,108 11,778 1,793 (1,797) 334
Beginning Balance at Dec. 31, 2023         11,374 11,537 1,667 (2,191) 361
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income (loss) 883 883     883   883    
Distributions to member         (610) (499) (111)    
Other comprehensive income (loss), net of income taxes 11   11   11     11  
Ending Balance at Mar. 31, 2024         11,658 11,038 2,439 (2,180) 361
Beginning Balance at Dec. 31, 2023         11,374 11,537 1,667 (2,191) 361
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income (loss) 2,888       2,888        
Other comprehensive income (loss), net of income taxes 57       57        
Ending Balance at Sep. 30, 2024         13,007 10,538 4,232 (2,134) 371
Beginning Balance at Mar. 31, 2024         11,658 11,038 2,439 (2,180) 361
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income (loss) 809 814   (5) 809   814   (5)
Distributions to member         (610) (500) (110)    
Other comprehensive income (loss), net of income taxes 19   19   19     19  
Ending Balance at Jun. 30, 2024         11,876 10,538 3,143 (2,161) 356
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income (loss) 1,196 $ 1,200   (4) 1,196   1,200   (4)
Changes in equity of noncontrolling interests 19     $ 19 19       19
Distributions to member         (111)   (111)    
Other comprehensive income (loss), net of income taxes $ 27   $ 27   27     27  
Ending Balance at Sep. 30, 2024         $ 13,007 $ 10,538 $ 4,232 $ (2,134) $ 371