v3.26.3
PENSION AND OTHER POST-EMPLOYMENT BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Pension        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 4 $ 5 $ 13 $ 14
Interest cost 24 30 71 90
Expected return on plan assets (22) (26) (67) (78)
Amortization of actuarial loss 13 14 37 42
Amortization of prior service cost (credit) 0 0 1 1
Total net periodic benefit cost 19 23 55 69
Other Post-Employment Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost 0 1 2 3
Amortization of prior service cost (credit) (0) (0) (1) (1)
Total net periodic benefit cost $ 0 $ 1 $ 1 $ 2