Document And Entity Information - shares	3 Months Ended
	Sep. 29, 2019	Oct. 25, 2019
Document Information [Line Items]
Document Transition Report	false
Document Quarterly Report	true
Entity Registrant Name	BRIGGS & STRATTON CORP
Entity Central Index Key	0000014195
Current Fiscal Year End Date	--06-28
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 29, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		42,483,625