v3.25.2
Pension and Other Benefits - Schedule of Net Pension and Other Benefit Costs (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 0.1 $ 0.2 $ 0.2 $ 0.3
Interest cost 8.8 8.3 17.6 16.6
Expected return on plan assets (7.1) (7.6) (14.2) (15.3)
Amortization of prior service cost 0.1 0.1 0.2 0.2
Amortization of actuarial losses (gains) 2.8 2.3 5.9 5.4
NET PERIODIC BENEFIT COST 4.7 3.3 9.7 7.2
Other Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 0.0 0.0 0.0 0.0
Interest cost 0.2 0.2 0.4 0.4
Expected return on plan assets 0.0 0.0 0.0 0.0
Amortization of prior service cost 0.0 0.0 0.0 0.0
Amortization of actuarial losses (gains) (0.2) (0.1) (0.3) (0.2)
NET PERIODIC BENEFIT COST $ 0.0 $ 0.1 $ 0.1 $ 0.2