Document And Entity Information	3 Months Ended
Oct. 02, 2011	Nov. 04, 2011
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 02, 2011
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1
Entity Registrant Name	BRIGGS & STRATTON CORP
Entity Central Index Key	0000014195
Current Fiscal Year End Date	--07-01
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		50,063,870

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