| Cover Page | Nov. 24, 2020 | Aug. 25, 2020 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Nov. 24, 2020 | |
| Entity Registrant Name | The J. M. Smucker Company | |
| Entity Incorporation, State or Country Code | OH | |
| Entity File Number | 001-05111 | |
| Entity Tax Identification Number | 34-0538550 | |
| Entity Address, Address Line One | One Strawberry Lane | |
| Entity Address, City or Town | Orrville, | |
| Entity Address, State or Province | OH | |
| Entity Address, Postal Zip Code | 44667-0280 | |
| City Area Code | 330 | |
| Local Phone Number | 682-3000 | |
| Title of 12(b) Security | Common shares, no par value | |
| Trading Symbol | SJM | |
| Security Exchange Name | NYSE | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Entity Emerging Growth Company | false | |
| Entity Central Index Key | 0000091419 | |
| Amendment Flag | false |
