v3.26.1
Document and Entity Information - shares
 6 Months Ended
Jul. 02, 2026
Aug. 06, 2026
Document Information [Line Items]    
Document Transition Report false  
Document Quarterly Report true  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 20-5665602  
Entity Address, Address Description 6300 S. Syracuse Way, Suite 200  
Entity Address, City or Town Centennial  
Entity Address, State or Province CO  
Entity Address, Postal Zip Code 80111  
City Area Code 303  
Local Phone Number 792-3600  
Trading Symbol NCMI  
Security Exchange Name NASDAQ  
Entity Interactive Data Current Yes  
Document Period End Date Jul. 02, 2026  
Entity Registrant Name NATIONAL CINEMEDIA, INC.  
Amendment Flag false  
Entity Central Index Key 0001377630  
Document Type 10-Q  
Entity File Number 001-33296  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Entity Small Business false  
Entity Current Reporting Status Yes  
Current Fiscal Year End Date --12-31  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   94,070,443
Entity Filer Category Accelerated Filer  
Entity Emerging Growth Company false  
Former Address    
Document Information [Line Items]    
Entity Address, Address Description 6300 S. Syracuse Way, Suite 300  
Entity Address, City or Town Centennial  
Entity Address, State or Province CO  
Entity Address, Postal Zip Code 80111