v3.22.0.1
LEASES - Lease costs (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Lessee, Lease, Description [Line Items]      
Interest expense on lease liabilities $ 5.2 $ 5.9 $ 7.6
Total lease cost 898.4 925.9 1,069.9
Depreciation and amortization      
Lessee, Lease, Description [Line Items]      
Amortization of finance lease assets 4.6 6.7 9.2
Finance lease obligations      
Lessee, Lease, Description [Line Items]      
Interest expense on lease liabilities 5.2 5.9 7.6
Theatres | Rent      
Lessee, Lease, Description [Line Items]      
Operating lease cost 775.4 813.7 876.0
Variable lease cost 52.6 70.4 91.8
Theatres | Operating expense (income)      
Lessee, Lease, Description [Line Items]      
Operating lease cost 1.1 2.8 9.1
Equipment | Operating expense (income)      
Lessee, Lease, Description [Line Items]      
Operating lease cost 10.7 14.6 14.4
Variable lease cost 43.4 6.4 56.3
Office And Other | General and administrative: other      
Lessee, Lease, Description [Line Items]      
Operating lease cost $ 5.4 $ 5.4 $ 5.5