v3.26.1
EMPLOYEE BENEFIT PLANS AND POSTRETIREMENT BENEFITS (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Pension        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost $ 2 $ 2 $ 4 $ 4
Interest cost 13 14 26 27
Expected return on assets (14) (13) (29) (25)
Amortization of:        
Prior service cost (credit) 0 1 0 1
Actuarial loss (gain) 4 5 9 10
Net periodic benefit cost (income) 5 9 10 17
Healthcare and Other        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost 1 1 2 3
Interest cost 2 3 5 6
Expected return on assets (1) (1) (1) (2)
Amortization of:        
Prior service cost (credit) 0 (5) 0 (10)
Actuarial loss (gain) (1) 0 (3) 0
Net periodic benefit cost (income) $ 1 $ (2) $ 3 $ (3)