v3.26.1
Condensed Statements of Common Stockholders' Equity (Unaudited) - MPC - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Paid-In Capital
Retained Earnings
Mississippi Power
Mississippi Power
Common Stock
Mississippi Power
Paid-In Capital
Mississippi Power
Retained Earnings
Mississippi Power
Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2024   1,098       1      
Beginning balance at Dec. 31, 2024         $ 2,089 $ 38 $ 4,791 $ (2,745) $ 5
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income         55     55  
Capital contributions from parent company         51   51    
Cash dividends on common stock $ (791)     $ (791) (48)     (48)  
Other (5)   $ (1) (2) (1)       (1)
Ending balance (in shares) at Mar. 31, 2025   1,100       1      
Ending balance at Mar. 31, 2025         2,146 $ 38 4,842 (2,738) 4
Beginning balance (in shares) at Dec. 31, 2024   1,098       1      
Beginning balance at Dec. 31, 2024         2,089 $ 38 4,791 (2,745) 5
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income 2,214       114        
Ending balance (in shares) at Jun. 30, 2025   1,101       1      
Ending balance at Jun. 30, 2025         2,164 $ 38 4,849 (2,727) 4
Beginning balance (in shares) at Mar. 31, 2025   1,100       1      
Beginning balance at Mar. 31, 2025         2,146 $ 38 4,842 (2,738) 4
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income 880       59     59  
Capital contributions from parent company         7   7    
Cash dividends on common stock (815)     (815) (49)     (49)  
Other 6   6 1 1     1  
Ending balance (in shares) at Jun. 30, 2025   1,101       1      
Ending balance at Jun. 30, 2025         2,164 $ 38 4,849 (2,727) 4
Beginning balance (in shares) at Dec. 31, 2025   1,120       1      
Beginning balance at Dec. 31, 2025         2,189 $ 38 4,871 (2,724) 4
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income         60     60  
Capital contributions from parent company         90   90    
Cash dividends on common stock (830)     (830) (48)     (48)  
Other (3)   (1)            
Ending balance (in shares) at Mar. 31, 2026   1,128       1      
Ending balance at Mar. 31, 2026         2,291 $ 38 4,961 (2,712) 4
Beginning balance (in shares) at Dec. 31, 2025   1,120       1      
Beginning balance at Dec. 31, 2025         2,189 $ 38 4,871 (2,724) 4
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income 2,531       112        
Ending balance (in shares) at Jun. 30, 2026   1,151       1      
Ending balance at Jun. 30, 2026         2,302 $ 38 4,968 (2,708) 4
Beginning balance (in shares) at Mar. 31, 2026   1,128       1      
Beginning balance at Mar. 31, 2026         2,291 $ 38 4,961 (2,712) 4
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income 1,174       52     52  
Capital contributions from parent company         7   7    
Cash dividends on common stock (858)     (858) (48)     (48)  
Other $ 6   $ 5 $ 2          
Ending balance (in shares) at Jun. 30, 2026   1,151       1      
Ending balance at Jun. 30, 2026         $ 2,302 $ 38 $ 4,968 $ (2,708) $ 4