v3.26.1
Statements of Changes in Shareholder's Equity (Unaudited) - MEC - USD ($)
$ in Millions
Total
Additional Paid-in Capital
Retained Earnings
MEC
MEC
Common Stock
MEC
Additional Paid-in Capital
MEC
Retained Earnings
Balance at Dec. 31, 2024       $ 10,181 $ 0 $ 561 $ 9,620
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income $ 1,889     477     477
Other equity transactions (7)   $ (3)        
Balance at Jun. 30, 2025       10,658 0 561 10,097
Balance at Mar. 31, 2025       10,412 0 561 9,851
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 702     245     245
Other equity transactions (2)   (1) 1     1
Balance at Jun. 30, 2025       10,658 0 561 10,097
Balance at Dec. 31, 2025 54,065     10,742 0 561 10,181
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 2,005     511     511
Other equity transactions 6 $ 5 (1)        
Dividends declared       (200)     (200)
Balance at Jun. 30, 2026 55,883     11,053 0 561 10,492
Balance at Mar. 31, 2026       10,990 0 561 10,429
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 891     263     263
Other equity transactions (3)   $ (1)        
Dividends declared       (200)     (200)
Balance at Jun. 30, 2026 $ 55,883     $ 11,053 $ 0 $ 561 $ 10,492