Lease Commitments - Supplemental Cash Flow Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for amounts included in the measurement of lease liabilities - operating cash flows	$ 69.5	$ 107.9
Supplemental non-cash information
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 58.5	$ 164.8