Document And Entity Information - shares	3 Months Ended	9 Months Ended
	Mar. 29, 2020	Mar. 29, 2020	Apr. 24, 2020	Jan. 24, 2020
Document Information [Line Items]
Document Transition Report	false
Document Quarterly Report	true
Entity Registrant Name		BRIGGS & STRATTON CORPORATION
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		Mar. 29, 2020
Document Fiscal Year Focus		2020
Document Fiscal Period Focus		Q3
Amendment Flag		false
Entity Common Stock, Shares Outstanding			42,453,535	42,478,165
City Area Code		(414)
Local Phone Number		259-5333
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
Entity File Number		1-1370
Entity Well-known Seasoned Issuer		Yes
Entity Voluntary Filers		Yes
Entity Ex Transition Period		false
Entity Shell Company		false
Entity Incorporation, State or Country Code		WI
Entity Tax Identification Number		39-0182330
Title of 12(b) Security		Common Stock (par value $0.01 per share)
Trading Symbol		BGG
Security Exchange Name		NYSE
Entity Small Business		false
Entity Emerging Growth Company		false