Pension and Post-Employment Benefits - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Europe [Member]
Defined Benefit Plan Disclosure [Line Items]
Post-employment obligations European businesses	$ 4.8	$ 5.3

Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as noncurrent. Excludes other postretirement benefit plan.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant