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Schedule of Pension Plans with Accumulated Benefit Obligation and Projected Benefit Obligation in Excess of Plan Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
UNITED STATES    
Defined Benefit Plan Disclosure    
Projected benefit obligation $ 41.3 $ 43.1
Accumulated benefit obligation 41.1 42.6
Foreign Pension Plans, Defined Benefit    
Defined Benefit Plan Disclosure    
Projected benefit obligation 30.3 34.0
Accumulated benefit obligation 29.1 32.5
Fair value of plan assets $ 2.0 $ 1.9