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Related Party Transactions (Schedule of Amounts Due to Founding Members, Net) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 30, 2023
Dec. 29, 2022
Related Party Transaction [Line Items]    
Theater access fees and revenue share, net of beverage revenues and other encumbered theater payments $ 13.8 $ 15.2
Total amounts due to founding members, net 13.8 15.2
RelatedPartyTRAPayment,Regal 0.0  
RelatedPartyTRAPayment,Cinemark 0.0  
Cinemark    
Related Party Transaction [Line Items]    
Theater access fees and revenue share, net of beverage revenues and other encumbered theater payments 9.7 11.1
Total amounts due to founding members, net 9.7 11.1
Regal    
Related Party Transaction [Line Items]    
Theater access fees and revenue share, net of beverage revenues and other encumbered theater payments 4.1 4.1
Total amounts due to founding members, net $ 4.1 $ 4.1