v3.26.3
Borrowings - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 18, 2026
Mar. 06, 2025
Jan. 24, 2025
Oct. 01, 2026
Sep. 25, 2025
Oct. 01, 2026
Sep. 25, 2025
Jan. 01, 2026
Debt Instrument [Line Items]                
Repayment of line of credit           $ 12.0 $ 20.0  
Loss on debt extinguishment       $ (0.5) $ 0.0 $ (0.5) $ (1.8)  
2026 Term Loan Facility | Base Rate                
Debt Instrument [Line Items]                
Interest rate 6.00%     6.50%   6.50%    
2026 Term Loan Facility | SOFR                
Debt Instrument [Line Items]                
Interest rate 7.00%     7.50%   7.50%    
2026 Term Loan Facility | Paid-in-Kind Interest                
Debt Instrument [Line Items]                
Interest rate       2.00%   2.00%    
NCM, LLC.                
Debt Instrument [Line Items]                
Aggregate principal amount       $ 285.0   $ 285.0   $ 12.0
NCM, LLC. | 2026 Term Loan Facility                
Debt Instrument [Line Items]                
Aggregate principal amount $ 275.0     275.0 [1]   275.0 [1]   0.0 [1]
Outstanding balance       275.0   275.0    
NCM, LLC. | 2026 Term Loan Facility | First Three Years of Term Loan Facility                
Debt Instrument [Line Items]                
Basis spread on variable rate, percent 2.50%              
NCM, LLC. | 2026 Term Loan Facility | Last Two Years of Term Loan Facility                
Debt Instrument [Line Items]                
Basis spread on variable rate, percent 5.00%              
NCM, LLC. | 2026 Term Loan Facility | First Year Anniversary                
Debt Instrument [Line Items]                
Line of credit facility, prepayment premium 3.00%              
NCM, LLC. | 2026 Term Loan Facility | Second Year Anniversary                
Debt Instrument [Line Items]                
Line of credit facility, prepayment premium 2.00%              
NCM, LLC. | 2026 Term Loan Facility | Third Year Anniversary                
Debt Instrument [Line Items]                
Line of credit facility, prepayment premium 1.00%              
NCM, LLC. | 2026 Revolving Credit Facility                
Debt Instrument [Line Items]                
Aggregate principal amount [1]       10.0   10.0   0.0
Borrowing amount of credit facility $ 25.0     25.0   25.0    
Outstanding balance       10.0   10.0    
Line of credit facility, current borrowing capacity       14.3   14.3    
Debt issuance costs, gross       $ 8.6   $ 8.6    
Line of credit facility, unused capacity, commitment fee percentage 0.50%              
Maturity date Sep. 18, 2031              
Line of credit facility, frequency of commitment fee payment quarterly              
NCM, LLC. | 2026 Revolving Credit Facility | Minimum                
Debt Instrument [Line Items]                
Total net leverage ratio 1.00%     1.00%   1.00%    
Total required leverage ratio       1.00%   1.00%    
NCM, LLC. | 2026 Revolving Credit Facility | Maximum                
Debt Instrument [Line Items]                
Total net leverage ratio 5.00%     4.38%   4.38%    
Total required leverage ratio       5.00%   5.00%    
NCM, LLC. | 2026 Revolving Credit Facility | Step-down of Ratio One | Minimum                
Debt Instrument [Line Items]                
Total net leverage ratio 1.00%              
NCM, LLC. | 2026 Revolving Credit Facility | Step-down of Ratio One | Maximum                
Debt Instrument [Line Items]                
Total net leverage ratio 4.75%              
NCM, LLC. | 2026 Revolving Credit Facility | Step-down of Ratio Two | Minimum                
Debt Instrument [Line Items]                
Total net leverage ratio 1.00%              
NCM, LLC. | 2026 Revolving Credit Facility | Step-down of Ratio Two | Maximum                
Debt Instrument [Line Items]                
Total net leverage ratio 4.50%              
NCM, LLC. | Revolving Credit Facility 2023                
Debt Instrument [Line Items]                
Repayment of line of credit     $ 10.0          
NCM, LLC. | Letter of Credit                
Debt Instrument [Line Items]                
Borrowing amount of credit facility   $ 5.0   $ 5.0   $ 5.0    
Line of credit facility, current borrowing capacity       0.7   0.7    
Interest rate   2.00%            
NCM, LLC. | 2025 Credit Facility                
Debt Instrument [Line Items]                
Aggregate principal amount [2]       0.0   $ 0.0   $ 12.0
Borrowing amount of credit facility     $ 45.0          
Basis spread on variable rate, percent   2.00%            
Line of credit facility, unused capacity, commitment fee percentage   0.25%            
Maturity date     Jan. 24, 2028          
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]   SOFR            
Debt instrument, floor rate   0.00%            
Additional interest rate upon event of default   2.00%            
Repayment of line of credit $ 12.0              
Loss on debt extinguishment $ (0.5)     $ 0.5        
Line of credit facility, frequency of commitment fee payment   quarterly            
Leverage ratio   1            
Fixed charge coverage ratio   1            
NCM, LLC. | 2025 Credit Facility | Minimum                
Debt Instrument [Line Items]                
Fixed charge coverage ratio   1.5            
NCM, LLC. | 2025 Credit Facility | Maximum                
Debt Instrument [Line Items]                
Leverage ratio   2.25            
[1] The interest rates on the 2026 Credit Agreement are described below.
[2] The interest rates on the 2025 Credit Facility are described below.