v3.26.3
Related Party Transactions - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 01, 2026
Sep. 25, 2025
Oct. 01, 2026
Sep. 25, 2025
Apr. 02, 2026
Jan. 01, 2026
Dec. 31, 2013
Related Party Transaction [Line Items]              
AC JV cash distributions $ 0.2 $ 0.5 $ 0.4 $ 0.5      
Receivables, net of allowance 80.4   80.4     $ 96.5  
AC JV, LLC              
Related Party Transaction [Line Items]              
Investment in AC JV, LLC, Percentage             32.00%
Investment 1.0   1.0     0.8  
AC JV, LLC | NCM, LLC.              
Related Party Transaction [Line Items]              
Investment in AC JV, LLC, Percentage             4.00%
Investment 1.0   1.0     0.8  
Equity in earnings of non-consolidated entities 0.2 $ 0.8 0.1 $ 0.4      
MMC LP              
Related Party Transaction [Line Items]              
Investment in AC JV, LLC, Percentage         10.60%    
Investment 1.8   1.8     1.7  
Equity in earnings of non-consolidated entities 0.0   0.1        
Cost method investment 0.6   0.6     0.0  
Recognized revenue related to advertising services provided in exchange for equity interests $ 0.3   $ 0.6        
Looking Glass Media              
Related Party Transaction [Line Items]              
Investment in AC JV, LLC, Percentage 25.00%   25.00%        
Recognized revenue related to advertising services provided in exchange for equity interests $ 0.0   $ 0.2        
Receivables, net of allowance $ 0.1   $ 0.1     $ 0.3