Defined Contribution and Defined Benefit Retirement - Components of Net Periodic Defined Benefit Pension Benefit Cost (Credit) (Detail) - Defined Benefit Pension Plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
U.S.
Defined Benefit Plan Disclosure [Line Items]
Interest cost on PBO	$ 1.3	$ 1.9	$ 2.3
Expected return on plan assets	(2.1)	(2.1)	(2.3)
Recognized net actuarial losses	2.1	2.1	2.2
Settlement gain	(0.5)
Total	0.8	1.9	2.2
Non U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	14.7	13.3	12.8
Interest cost on PBO	8.3	10.1	13.5
Expected return on plan assets	(11.4)	(9.0)	(11.9)
Recognized net actuarial losses	19.5	17.3	12.8
Amortization of prior service cost	0.2	0.2	0.2
Total	$ 31.3	$ 31.9	$ 27.4