v3.22.0.1
STOCKHOLDERS' EQUITY - Related Party Transactions (Details)
$ in Millions
12 Months Ended
Sep. 14, 2018
USD ($)
item
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Related Party Transactions        
Conversion of principal amount   $ 600.0    
2.95% Senior Secured Convertible Notes due 2024        
Related Party Transactions        
Principal balance $ 600.0      
Maximum        
Related Party Transactions        
Ownership percentage   50.00%    
Class B common stock | Maximum | 2.95% Senior Secured Convertible Notes due 2024        
Related Party Transactions        
Number of shares upon conversion | item 5,666,000      
Wanda        
Related Party Transactions        
Receivable due from related party   $ 0.0 $ 0.7  
Reimbursements   $ 0.0 $ 0.3 $ 0.4
Silver Lake | 2.95% Senior Secured Convertible Notes due 2024        
Related Party Transactions        
Principal balance $ 600.0