Quarterly report pursuant to Section 13 or 15(d)

Other Investments- Summary of Activity for Each of Company's Other Investments (Detail)

v3.22.2
Other Investments- Summary of Activity for Each of Company's Other Investments (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Schedule Of Equity Method Investments [Line Items]        
Investments, beginning balance     $ 25.2  
Cash distributions received     (1.5) $ (0.2)
Equity in loss of affiliates $ (5.5) $ (8.1) (7.7) $ (14.9)
Investments, ending balance 25.6   25.6  
Digital Cinema Distribution Coalition        
Schedule Of Equity Method Investments [Line Items]        
Investments, beginning balance     25.2  
Cash distributions received     (1.5)  
Equity in loss of affiliates     2.0  
Other     (0.1)  
Investments, ending balance 25.6   25.6  
Other Affiliates        
Schedule Of Equity Method Investments [Line Items]        
Investments, beginning balance     3.7  
Cash distributions received     (1.5)  
Equity in loss of affiliates     1.3  
Other     0.0  
Investments, ending balance 3.5   3.5  
Other Affiliates | Digital Cinema Distribution Coalition        
Schedule Of Equity Method Investments [Line Items]        
Investments, beginning balance     1.8  
Cash distributions received     0.0  
Equity in loss of affiliates     0.1  
Other     0.0  
Investments, ending balance 1.9   1.9  
Other Affiliates | FE Concepts, LLC        
Schedule Of Equity Method Investments [Line Items]        
Investments, beginning balance     19.3  
Cash distributions received     0.0  
Equity in loss of affiliates     0.6  
Other     0.0  
Investments, ending balance 19.9   19.9  
Other Affiliates | Other Investments        
Schedule Of Equity Method Investments [Line Items]        
Investments, beginning balance     0.4  
Cash distributions received     0.0  
Equity in loss of affiliates     0.0  
Other     (0.1)  
Investments, ending balance $ 0.3   $ 0.3