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OTHER INVESTMENTS - Additional Information (Detail)
$ in Millions
 12 Months Ended
Apr. 30, 2018
USD ($)
Dec. 31, 2022
USD ($)
Studio
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Digital Cinema Implementation Partners        
Schedule Of Equity Method Investments [Line Items]        
Description of digital cinema deployment agreements   The DCDAs were set to end on the earlier of (i) the tenth anniversary of the "mean deployment date" for all digital projection systems scheduled to be deployed over a period of up to five years, or (ii) the date DCIP achieves "cost recoupment", each as defined in the DCDAs.    
Number of major motion picture studio, long-term digital cinema deployment agreements | Studio   6    
Operating lease right of use asset write off       $ 7.5
Operating lease right of use liabilities write off       14.1
Gain on sale of asset       6.6
Lease termination liability       4.2
Cash distributions from DCIP [1]   $ 3.7 $ 13.1 10.4
Fair value of projectors       102.7
Reduction in investment in DCIP       89.8
Other       12.9
Final Distribution   3.7    
Investments in affiliates   $ 0.0 0.0  
Digital Cinema Implementation Partners | Maximum        
Schedule Of Equity Method Investments [Line Items]        
Deployment period of digital cinema deployment agreements   5 years    
AC JV, LLC        
Schedule Of Equity Method Investments [Line Items]        
Cash distributions from DCIP   $ 2.9    
AC JV, LLC | Film rentals and advertising        
Schedule Of Equity Method Investments [Line Items]        
Event fees   $ 13.3 6.2 3.7
Digital Cinema Distribution Coalition        
Schedule Of Equity Method Investments [Line Items]        
Percentage of voting interest   14.60%    
Payments for content delivery services   $ 0.5 0.6 0.4
F E Concepts L L C [Member]        
Schedule Of Equity Method Investments [Line Items]        
Percentage of voting interest   50.00%    
F E Concepts L L C [Member] | AWSR Investments, LLC        
Schedule Of Equity Method Investments [Line Items]        
Percentage of voting interest 50.00%      
Cash distributions from DCIP   $ 4.0    
Payments to Acquire Equity Method Investments $ 20.0      
Management fee revenues   $ 0.1 $ 0.1 $ 0.0
[1] Recorded as a reduction in the Company's investment in DCIP for the year ended December 31, 2020. Recorded in cash distributions from DCIP on the consolidated statements of loss of Holdings and CUSA for the years ended December 31, 2021 and 2022. See discussion at Distribution of Projectors from DCIP above.