v3.26.1
PENSION AND NON-PENSION POST-EMPLOYMENT BENEFIT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 0.6 $ 0.5
Interest cost 2.7 2.5
Expected return on plan assets (2.6) (2.5)
Amortization of net gain (0.1) (0.1)
Net periodic benefit cost 0.6 0.4
Other Benefits Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 1.1 0.8
Interest cost 0.7 0.7
Expected return on plan assets 0.0 0.0
Amortization of net gain (0.9) (0.5)
Net periodic benefit cost $ 0.9 $ 1.0