v3.26.1
PENSION AND POSTRETIREMENT BENEFIT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Pension Benefit        
Net periodic benefit costs:        
Service cost - benefits earned during the period $ 1 $ 0 $ 1 $ 0
Interest cost on projected benefit obligation 3 3 7 7
Expected return on plan assets (6) (5) (12) (11)
Settlement loss 0 1 0 1
Amortization of net actuarial loss     0 0
Amortization of prior service cost credit 0 0 0 0
Net periodic benefit costs (2) (1) (4) (3)
Postretirement Benefit        
Net periodic benefit costs:        
Service cost - benefits earned during the period 0 0 1 1
Interest cost on projected benefit obligation 1 2 2 3
Expected return on plan assets (1) (1) (2) (2)
Settlement loss 0 0 0 0
Amortization of net actuarial loss     0 (1)
Amortization of prior service cost credit (1) (1) (3) (2)
Net periodic benefit costs $ (1) $ 0 $ (2) $ (1)