| Cover Page | Feb. 20, 2025 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Feb. 20, 2025 |
| Entity Registrant Name | GANNETT CO., INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-36097 |
| Entity Tax Identification Number | 38-3910250 |
| Entity Address, Address Line One | 175 Sully's Trail |
| Entity Address, Address Line Two | Suite 203 |
| Entity Address, City or Town | Pittsford, |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 14534-4560 |
| City Area Code | 585 |
| Local Phone Number | 598-0030 |
| 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 | GCI |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001579684 |
