Pension and Other Employee Benefits - Components of Net Periodic Benefit Cost (Detail) - Pension Benefits [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.7	$ 0.7	$ 0.5
Interest cost	0.2	0.3	0.6
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.7	0.7	0.5
Interest cost	0.2	0.3	0.6
Expected return on plan assets	(0.4)	(0.5)	(1.1)
Amortization of actuarial losses and prior year service costs	0.6	0.4	0.1
Net periodic benefit cost	$ 1.1	$ 0.9	$ 0.1