| Document And Entity Information | Nov. 05, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 05, 2024 |
| Entity Registrant Name | National CineMedia, Inc. |
| Entity Central Index Key | 0001377630 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-33296 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 20-5665602 |
| Entity Address, Address Line One | 6300 S. Syracuse Way, Suite 300 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | NCMI |
| Security Exchange Name | NASDAQ |
