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OTHER INVESTMENTS - Summary Financial Information for DCIP (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]      
Revenue $ 2,454.7 $ 1,510.5 $ 686.3
Net income (loss) (268.0) (422.2) (617.9)
Digital Cinema Implementation Partners | Other Affiliates      
Schedule Of Equity Method Investments [Line Items]      
Revenue 1.0 [1] 54.4 30.6
Operating income (loss) (0.9) [1] 43.1 (105.7)
Net income (loss) (1.1) [1] 45.3 $ (114.2)
Current assets 0.3 [1] 22.9  
Current liabilities 0.0 [1] 11.6  
Members' equity (deficit) $ 0.3 [1] $ 11.3  
[1] DCIP ceased operations at the end of the second quarter of 2022.