v3.26.1
PENSION AND OTHER POST-EMPLOYMENT BENEFIT OBLIGATIONS (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Pension    
Defined Benefit Plan Disclosure [Line Items]    
Current service cost $ (4) $ (4)
Interest cost (6) (6)
Expected return on plan assets 6 6
Amortization of past service gain 0 0
Total net pension and other long-term benefit cost (4) (4)
OPEB and Other Benefits    
Defined Benefit Plan Disclosure [Line Items]    
Current service cost (1) (1)
Interest cost (2) (2)
Expected return on plan assets 0 0
Amortization of past service gain 3 3
Total net pension and other long-term benefit cost $ 0 $ 0