v3.24.3
Defined Benefit Pension Plans and Other Post-Employment Benefit Plans - Components of Net Periodic Benefit Cost (Income) for Defined Benefit Pension Plans (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Components of net periodic benefit cost:        
Service cost $ 1.0 $ 0.9 $ 2.9 $ 2.5
Interest cost 6.7 7.0 20.3 21.0
Expected return on plan assets (7.5) (7.1) (22.5) (21.3)
Amortization of net prior service cost 0.1 0.1 0.2 0.2
Amortization of net actuarial loss 1.5 1.2 4.3 3.6
Net periodic benefit cost 1.8 2.1 5.2 6.0
Settlement (credit) cost (0.3) 0.0 (0.3) 0.1
Total benefit cost 1.5 2.1 4.9 6.1
U.S.        
Components of net periodic benefit cost:        
Service cost 0.1 0.1 0.1 0.1
Interest cost 1.6 1.8 4.9 5.4
Expected return on plan assets (1.7) (1.8) (5.2) (5.4)
Amortization of net prior service cost 0.0 0.0 0.0 0.0
Amortization of net actuarial loss 0.5 0.4 1.3 1.2
Net periodic benefit cost 0.5 0.5 1.1 1.3
Settlement (credit) cost 0.0 0.0 0.0 0.0
Total benefit cost 0.5 0.5 1.1 1.3
International        
Components of net periodic benefit cost:        
Service cost 0.9 0.8 2.8 2.4
Interest cost 5.1 5.2 15.4 15.6
Expected return on plan assets (5.8) (5.3) (17.3) (15.9)
Amortization of net prior service cost 0.1 0.1 0.2 0.2
Amortization of net actuarial loss 1.0 0.8 3.0 2.4
Net periodic benefit cost 1.3 1.6 4.1 4.7
Settlement (credit) cost (0.3) 0.0 (0.3) 0.1
Total benefit cost $ 1.0 $ 1.6 $ 3.8 $ 4.8