Retirement Plans, Postretirement and Postemployment Benefits - Schedule of Accumulated Benefit Obligations in Excess of Plan Assets (Detail) - Pension - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 100.7	$ 86.3
Accumulated benefit obligation	90.9	79.5
Fair value of plan assets	$ 0.5	$ 0.5