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Pensions - Summary of Components of Net Periodic Pension Expense (Benefit) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
U.S.        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 0.0 $ 0.0 $ 0.0 $ 0.0
Interest cost 1.4 1.5 4.2 4.4
Amortization of actuarial loss 0.6 0.5 1.8 1.5
Amortization of prior service cost 0.0 0.0 0.0 0.0
Expected return on plan assets (1.4) (1.8) (4.2) (5.4)
Net periodic pension expense 0.6 0.2 1.8 0.5
Non-U.S. Benefit Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 0.1 0.0 0.2 0.1
Interest cost 0.4 0.4 1.1 1.1
Amortization of actuarial loss 0.1 0.3 0.4 0.7
Amortization of prior service cost 0.0 0.0 0.1 0.1
Expected return on plan assets (0.5) (0.6) (1.5) (1.7)
Net periodic pension expense $ 0.1 $ 0.1 $ 0.3 $ 0.3