Lease Commitments - Lease Cost Components (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating Lease Cost	$ 109.2	$ 104.5
Variable Lease, Cost	54.7	82.2
Sublease Income	(2.7)	(2.9)
Total Lease Cost	$ 161.2	$ 183.8