Lease Accounting - Schedule of Aggregate Lease Costs by Lease Classification (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Lease Cost [Line Items]
Total operating lease costs		$ 84.8	$ 92.1	$ 166.2	$ 175.6
Total finance lease costs		4.9	4.3	9.4	8.5
Depreciation and Amortization
Lease Cost [Line Items]
Amortization of leased assets		3.4	3.0	6.5	6.0
Interest Expense
Lease Cost [Line Items]
Interest on lease liabilities		1.5	1.3	2.9	2.5
Equipment | Utilities and Other
Lease Cost [Line Items]
Total operating lease costs	[1]	0.8	1.3	1.6	2.7
Real Estate | Facility Lease Expense
Lease Cost [Line Items]
Total operating lease costs	[1]	$ 84.0	$ 90.8	$ 164.6	$ 172.9

[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     Six Months Ended       June 30,     June 30,   Lease Cost Classification 2024     2023     2024     2023   Operating lease costs                         Equipment - Short-term and variable lease payments Utilities and other $ 0.7     $ 1.2     $ 1.4     $ 2.5   Real Estate - Variable lease payments (1) Facility lease expense $ 16.5     $ 20.1     $ 28.7     $ 32.8   Real Estate - Office leases General and administrative $ 0.3     $ 0.3     $ 0.6     $ 0.6   (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.