Defined Benefit Pension Plans - Components of Net Periodic Defined Benefit Pension Benefit Cost (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Compensation And Retirement Disclosure [Abstract]
Service cost	$ 1.6	$ 3.0
Interest cost	5.6	3.2
Expected return on plan assets	(5.2)	(3.5)
Recognized actuarial losses	0.9	3.8
Total	$ 2.9	$ 6.5