| Document and Entity Information | Jan. 06, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 6, 2021 |
| Entity Registrant Name | BRIGGS & STRATTON CORPORATION |
| Entity Incorporation, State or Country Code | WI |
| Entity File Number | 1-1370 |
| Entity Tax Identification Number | 39-0182330 |
| Entity Address, Address Line One | 12301 West Wirth Street |
| Entity Address, City or Town | Wauwatosa |
| Entity Address, State or Province | WI |
| Entity Address, Postal Zip Code | 53222 |
| City Area Code | 414 |
| Local Phone Number | 259-5333 |
| 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 | 0000014195 |
| Title of 12(b) Security | Common Stock (par value $0.01 per share) |
| Trading Symbol | BGGSQ |
| Security Exchange Name | NONE |
