Employee Benefit Plans - Components of Net Periodic Benefit Cost (Detail) - Defined Benefit Pension Plans - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2.8	$ 3.7	$ 8.7	$ 11.1
Interest cost	2.7	2.2	8.3	6.6
Expected return on plan assets	(3.1)	(2.9)	(9.2)	(8.9)
Amortization of prior service cost				0.1
Recognized actuarial losses	3.2	5.0	10.0	15.2
Total	$ 5.6	$ 8.0	$ 17.8	$ 24.1