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IMPACT OF THE COVID-19 PANDEMIC - Schedule of Restructuring Plan (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Unusual Or Infrequent Item [Line Items]      
Restructuring costs $ (0.5) $ (1.0) $ 20.3
Restructuring Reserve, Ending Balance 0.0    
2020 Restructuring Plan | U.S. Operating Segment      
Unusual Or Infrequent Item [Line Items]      
Restructuring Reserve, Beginning Balance 1.3 6.6  
Restructuring costs     16.6
Amounts paid (0.9) (4.3) (9.2)
Noncash write-offs     (0.8)
Reserve adjustments [1] (0.4) (1.0)  
Restructuring Reserve, Ending Balance 0.0 1.3 6.6
2020 Restructuring Plan | U.S. Operating Segment | Employee Related      
Unusual Or Infrequent Item [Line Items]      
Restructuring Reserve, Beginning Balance 0.4 0.9  
Restructuring costs     9.0
Amounts paid (0.4) (0.4) (7.6)
Noncash write-offs     (0.5)
Reserve adjustments [1] 0.0 (0.1)  
Restructuring Reserve, Ending Balance 0.0 0.4 0.9
2020 Restructuring Plan | U.S. Operating Segment | Facility Closure Costs      
Unusual Or Infrequent Item [Line Items]      
Restructuring Reserve, Beginning Balance 0.9 5.7  
Restructuring costs     7.6
Amounts paid (0.5) (3.9) (1.6)
Noncash write-offs     (0.3)
Reserve adjustments [1] (0.4) (0.9)  
Restructuring Reserve, Ending Balance 0.0 0.9 5.7
2020 Restructuring Plan | International Operating Segment      
Unusual Or Infrequent Item [Line Items]      
Restructuring Reserve, Beginning Balance 0.1 0.1  
Restructuring costs     3.7
Amounts paid 0.0 0.0 (1.4)
Noncash write-offs (2.2)    
Reserve adjustments [1] (0.1) 0.0  
Restructuring Reserve, Ending Balance 0.0 0.1 0.1
2020 Restructuring Plan | International Operating Segment | Employee Related      
Unusual Or Infrequent Item [Line Items]      
Restructuring Reserve, Beginning Balance 0.0 0.0  
Restructuring costs     0.8
Amounts paid 0.0 0.0 (0.8)
Noncash write-offs     0.0
Reserve adjustments [1] 0.0 0.0  
Restructuring Reserve, Ending Balance 0.0 0.0 0.0
2020 Restructuring Plan | International Operating Segment | Facility Closure Costs      
Unusual Or Infrequent Item [Line Items]      
Restructuring Reserve, Beginning Balance 0.1 0.1  
Restructuring costs     2.9
Amounts paid 0.0 0.0 (0.6)
Noncash write-offs     (2.2)
Reserve adjustments [1] (0.1) 0.0  
Restructuring Reserve, Ending Balance 0.0 0.1 0.1
2020 Restructuring Plan | Consolidated      
Unusual Or Infrequent Item [Line Items]      
Restructuring Reserve, Beginning Balance 1.4 6.7  
Restructuring costs     20.3
Amounts paid (0.9) (4.3) (10.6)
Noncash write-offs     (3.0)
Reserve adjustments [1] (0.5) (1.0)  
Restructuring Reserve, Ending Balance 0.0 1.4 6.7
2020 Restructuring Plan | Consolidated | Employee Related      
Unusual Or Infrequent Item [Line Items]      
Restructuring Reserve, Beginning Balance 0.4 0.9  
Restructuring costs     9.8
Amounts paid (0.4) (0.4) (8.4)
Noncash write-offs     (0.5)
Reserve adjustments [1] 0.0 (0.1)  
Restructuring Reserve, Ending Balance 0.0 0.4 0.9
2020 Restructuring Plan | Consolidated | Facility Closure Costs      
Unusual Or Infrequent Item [Line Items]      
Restructuring Reserve, Beginning Balance 1.0 5.8  
Restructuring costs     10.5
Amounts paid (0.5) (3.9) (2.2)
Noncash write-offs     (2.5)
Reserve adjustments [1] (0.5) (0.9)  
Restructuring Reserve, Ending Balance $ 0.0 $ 1.0 $ 5.8
[1] Amounts were primarily adjustments based on final facility lease payments for certain closed theatres as compared with original estimates recorded.