Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.1
Other Investments- Summary of Activity for Each of Company's Other Investments (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Schedule Of Equity Method Investments [Line Items]    
Investments, beginning balance $ 25.2  
Cash distributions received (0.6) $ (0.2)
Equity in loss of affiliates (2.2) $ (6.8)
Investments, ending balance 25.8  
Other Affiliates    
Schedule Of Equity Method Investments [Line Items]    
Investments, beginning balance 25.2  
Cash distributions received (0.6)  
Equity in loss of affiliates 1.3  
Other (0.1)  
Investments, ending balance 25.8  
Other Affiliates | AC JV, LLC    
Schedule Of Equity Method Investments [Line Items]    
Investments, beginning balance 3.7  
Cash distributions received (0.6)  
Equity in loss of affiliates 1.0  
Investments, ending balance 4.1  
Other Affiliates | Digital Cinema Distribution Coalition    
Schedule Of Equity Method Investments [Line Items]    
Investments, beginning balance 1.8  
Equity in loss of affiliates 0.1  
Investments, ending balance 1.9  
Other Affiliates | FE Concepts, LLC    
Schedule Of Equity Method Investments [Line Items]    
Investments, beginning balance 19.3  
Equity in loss of affiliates 0.2  
Investments, ending balance 19.5  
Other Affiliates | Other Investments    
Schedule Of Equity Method Investments [Line Items]    
Investments, beginning balance 0.4  
Other (0.1)  
Investments, ending balance $ 0.3