Document And Entity Information - USD ($)	12 Months Ended
	Jul. 01, 2018	Aug. 17, 2018	Dec. 31, 2017
Document Information [Line Items]
Entity Registrant Name	BRIGGS & STRATTON CORP
Entity Central Index Key	0000014195
Current Fiscal Year End Date	--07-01
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Jul. 01, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		42,387,590
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 1,108,685,000