v3.25.2
PENSION AND OTHER POST-EMPLOYMENT BENEFIT OBLIGATIONS - Schedule of of net benefit costs (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 Plan Disclosure [Line Items]        
Current service cost $ (5) $ (5) $ (9) $ (9)
Interest cost (5) (6) (11) (12)
Expected return on plan assets 5 5 11 11
Amortization of past service gain 1 1 1 1
Amortization of net actuarial gain 0 0 0 0
Total net pension and other long-term benefit cost (4) (5) (8) (9)
OPEB and Other Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Current service cost (1) (1) (2) (2)
Interest cost (2) (2) (4) (4)
Expected return on plan assets 0 0 0 0
Amortization of past service gain 2 2 5 5
Amortization of net actuarial gain 1 1 1 1
Total net pension and other long-term benefit cost $ 0 $ 0 $ 0 $ 0