Pension and Post-Employment Benefits - Unfunded Defined Benefit Pension Plan (Detail) - German Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Plan net pension charge:
Service cost	$ 0.1	$ 0.1	$ 0.1
Interest cost on PBO	0.1	0.1	0.2
Amortization of actuarial net loss	1.0	0.8	0.3
Net periodic benefit	$ 1.2	$ 1.0	$ 0.6
Plan assumptions at December 31, (%):
Discount rate	0.90%	0.40%	0.80%
Inflation rate	2.00%	1.50%	1.75%
Rate of increase in compensation levels	2.75%	2.75%	2.75%