Lease Commitments - Supplemental Cash Flow Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for amounts included in the measurement of lease liabilities - operating cash flows	$ 91.4	$ 70.3
Supplemental non-cash information
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 122.6	$ 61.0