v3.26.1
PENSION AND POSTRETIREMENT BENEFIT PLANS - Schedule of Components of Net Periodic Benefit Costs (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Pension Benefit    
Net periodic benefit costs:    
Service cost - benefits earned during the period $ 0 $ 0
Interest cost on projected benefit obligation 4 4
Expected return on plan assets (6) (6)
Amortization of net actuarial loss   0
Amortization of prior service cost credit 0 0
Net periodic benefit costs (2) (2)
Postretirement Benefit    
Net periodic benefit costs:    
Service cost - benefits earned during the period 1 1
Interest cost on projected benefit obligation 1 1
Expected return on plan assets (1) (1)
Amortization of net actuarial loss   (1)
Amortization of prior service cost credit (2) (1)
Net periodic benefit costs $ (1) $ (1)