Lease Accounting - Schedule of Aggregate Lease Costs by Lease Classification (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Lease Cost [Line Items]
Operating Lease, Cost		$ 89.2	$ 80.5	$ 264.8	$ 239.0
Total finance lease costs		4.2	4.5	12.7	13.5
Depreciation and Amortization
Lease Cost [Line Items]
Amortization of leased assets		3.0	3.1	9.0	9.4
Interest Expense
Lease Cost [Line Items]
Interest on lease liabilities		1.2	1.4	3.7	4.1
Equipment | Utilities and Other
Lease Cost [Line Items]
Operating Lease, Cost	[1]	0.7	1.0	3.4	2.6
Real Estate | Facility Lease Expense
Lease Cost [Line Items]
Operating Lease, Cost	[1]	$ 88.5	$ 79.5	$ 261.4	$ 236.4

[1] Includes short-term lease payments, variable lease payments and office lease payments reflected in general and administrative expense as set forth in the following table for the periods presented:       Three Months Ended     Nine Months Ended       September 30,     September 30,   Lease Cost Classification 2023     2022     2023     2022   Operating lease costs                         Equipment - Short-term and variable lease payments Utilities and other $ 0.5     $ 0.8     $ 3.0     $ 2.2   Real Estate - Variable lease payments (1) Facility lease expense $ 18.2     $ 9.4     $ 51.0     $ 27.5   Real Estate - Office leases General and administrative $ 0.4     $ 0.3     $ 1.0     $ 1.0   (1) Represents lease payments that are based on a change in index, such as CPI or inflation, variable payments based on revenue or attendance and variable common area maintenance costs.