| Cover | Oct. 22, 2019 |
| Cover page. | |
| Document Type | 8-K |
| Document Period End Date | Oct. 22, 2019 |
| Entity Registrant Name | Hasbro, Inc. |
| Entity Central Index Key | 0000046080 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | RI |
| Entity File Number | 1-6682 |
| Entity Tax Identification Number | 05-0155090 |
| Entity Address, Address Line One | 1027 Newport Avenue |
| Entity Address, City or Town | Pawtucket, |
| Entity Address, State or Province | RI |
| Entity Address, Postal Zip Code | 02861 |
| City Area Code | 401 |
| Local Phone Number | 431-8697 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.50 par value per share |
| Trading Symbol | HAS |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
