Leases - Schedule of Information on Leases (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Lease cost	$ 85.8	$ 83.7	$ 76.0
Cash paid for leases recognized in operating cash flows	86.3	81.4	73.6
Right-of-use assets obtained in exchange for new lease liabilities	96.4	83.5	$ 55.0
Right-of-use assets recognized in Other assets	$ 271.2	$ 274.5
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets	us-gaap:OtherAssets
Lease liabilities recognized in Other current liabilities	$ 69.3	$ 75.0
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities	Other current liabilities
Lease liabilities recognized in Other long-term liabilities	$ 220.2	$ 217.8
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long-term liabilities	Other long-term liabilities
Weighted-average remaining lease term	5 years 10 months 24 days	5 years 9 months 18 days
Weighted-average discount rate	2.00%	2.30%