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Pension and Post-Employment Benefits - Plan Net Pension Credit (Detail) - GERMANY - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ (0.9) $ (0.6) $ (2.7) $ (1.8)
Interest cost on projected benefit obligation (5.1) (2.4) (15.0) (7.8)
Expected return on plan assets 6.5 3.8 19.0 12.3
Amortization of prior service cost (0.2) (0.1) (0.4) (0.4)
Amortization of actuarial net gains/(losses) 0.6 (0.1) 1.6 (0.4)
Net periodic benefit $ 0.9 $ 0.6 $ 2.5 $ 1.9