Leases - Summary of Other Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases, Operating [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 46.0	$ 46.0
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 41.0	$ 48.0
Weighted-average remaining lease term - operating leases	7 years	6 years
Weighted-average discount rate - operating leases	2.10%	1.90%