v3.25.1
Retirement Benefit Plans - Schedule of Net Periodic Benefit Cost for the Defined Benefit Pension Plans (Details) - Pension Plan - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Components of net periodic benefit cost (credit):    
Service cost $ 0.6 $ 0.6
Interest cost 7.0 6.8
Expected return on plan assets (4.3) (4.3)
Amortization of prior service cost 0.1 0.1
Net periodic benefit cost 3.4 3.2
U.S. Plans    
Components of net periodic benefit cost (credit):    
Service cost 0.2 0.1
Interest cost 4.3 4.3
Expected return on plan assets (2.1) (1.9)
Amortization of prior service cost 0.0 0.0
Net periodic benefit cost 2.4 2.5
Foreign Plan    
Components of net periodic benefit cost (credit):    
Service cost 0.4 0.5
Interest cost 2.7 2.5
Expected return on plan assets (2.2) (2.4)
Amortization of prior service cost 0.1 0.1
Net periodic benefit cost $ 1.0 $ 0.7