Document And Entity Information - shares	3 Months Ended	6 Months Ended
	Dec. 29, 2019	Dec. 29, 2019	Jan. 24, 2020
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		Dec. 29, 2019
Document Fiscal Year Focus		2020
Document Fiscal Period Focus		Q2
Amendment Flag		false
Entity Common Stock, Shares Outstanding			42,478,165