v3.25.2
EMPLOYEE BENEFIT PLANS AND POSTRETIREMENT BENEFITS - Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Pension        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost $ 2 $ 3 $ 4 $ 5
Interest cost 14 13 27 26
Expected return on assets (13) (14) (25) (27)
Amortization of:        
Prior service credit 1 0 1 0
Actuarial loss (gain) 5 6 10 11
Net periodic benefit cost 9 8 17 15
Healthcare        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost 0 0 1 1
Interest cost 3 2 5 4
Expected return on assets (1) 0 (2) (1)
Amortization of:        
Prior service credit (5) (6) (10) (12)
Actuarial loss (gain) 0 0 1 0
Net periodic benefit cost (3) (4) (5) (8)
Other        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost 1 1 2 2
Interest cost 0 1 1 2
Expected return on assets 0 0 0 0
Amortization of:        
Prior service credit 0 0 0 0
Actuarial loss (gain) 0 (1) (1) (1)
Net periodic benefit cost $ 1 $ 1 $ 2 $ 3