Schedule of Pension Plans with Accumulated Benefit Obligation and Projected Benefit Obligation in Excess of Plan Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
UNITED STATES
Defined Benefit Plan Disclosure
Projected benefit obligation	$ 58.0	$ 60.8
Accumulated benefit obligation	55.7	58.5
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure
Projected benefit obligation	45.8	51.0
Accumulated benefit obligation	42.5	46.5
Fair value of plan assets	$ 2.0	$ 1.9