v3.26.1
PENSION AND OTHER POSTRETIREMENT BENEFITS - Schedule of Components of Net Periodic Cost (Benefit) and Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 5 Months Ended 7 Months Ended 12 Months Ended
Dec. 31, 2025
Aug. 06, 2025
Dec. 31, 2024
Dec. 31, 2023
Other comprehensive income (loss):        
Deferred income taxes $ 6 $ 8 $ 34 $ 14
Recognized in other comprehensive income (loss), net of tax 19 25 105 45
Discontinued operations        
Components of net periodic cost:        
Net periodic cost (benefit)       7
Pension Benefits        
Components of net periodic cost:        
Service cost   0 0  
Interest cost 79 120 198 207
Expected return on plan assets (51) (77) (136) (128)
Amortization of actuarial gains (losses) 0 44 80 83
Net periodic cost (benefit) 28 87 142 162
Other comprehensive income (loss):        
Actuarial (loss) gain 29 0 57 (22)
Amortization of actuarial gains (losses) 0 44 80 83
Recognized in other comprehensive income (loss), before tax 29 44 137 61
Deferred income taxes (7) (11) (34) (14)
Recognized in other comprehensive income (loss), net of tax 22 33 103 47
Postretirement Benefits        
Components of net periodic cost:        
Service cost 0 1 1 1
Interest cost 4 5 10 12
Amortization of actuarial gains (losses) 0 (11) (17) (18)
Net periodic cost (benefit) 4 (5) (6) (5)
Other comprehensive income (loss):        
Actuarial (loss) gain (1) 0 14 11
Amortization of actuarial gains (losses) 0 (11) (17) (18)
Recognized in other comprehensive income (loss), before tax (1) (11) (3) (7)
Deferred income taxes 0 3 1 2
Recognized in other comprehensive income (loss), net of tax $ (1) $ (8) $ (2) $ (5)