v3.25.2
Pension and Post-Employment Benefits - Plan Net Pension Credit (Detail) - GERMANY - German Plan [Member] - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Defined Benefit Plan Disclosure [Line Items]        
Service credit/(cost) $ (1.2) $ (0.9) $ (2.4) $ (1.7)
Interest cost on projected benefit obligation 0.0 (4.6) (0.1) (9.3)
Expected return on plan assets 0.0 6.4 0.0 12.8
Amortization of prior service cost 0.0 (0.2) 0.0 (0.3)
Amortization of actuarial net gains 0.0 0.0 0.0 0.1
Net periodic benefit/(cost) $ (1.2) $ 0.7 $ (2.5) $ 1.6