v3.25.2
Pension and Postretirement Benefits (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Pension Benefits        
Components of net periodic benefit cost        
Service costs $ 0.9 $ 1.1 $ 1.9 $ 2.3
Interest costs 0.8 0.8 1.7 1.7
Expected return on plan assets (2.8) (2.6) (5.6) (5.3)
Recognized net actuarial loss 0.2 0.4 0.3 0.8
Net periodic benefit (income) expense (0.9) (0.3) (1.7) (0.5)
Postretirement Benefits        
Components of net periodic benefit cost        
Service costs 0.0 0.0 0.0 0.0
Interest costs 0.0 0.0 0.1 0.1
Expected return on plan assets 0.0 0.0 (0.1) (0.1)
Recognized net actuarial loss 0.0 0.0 0.0 0.1
Net periodic benefit (income) expense $ 0.0 $ 0.0 $ 0.0 $ 0.1