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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
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Litigation and Other Matters - Additional Information (Detail) - USD ($)				3 Months Ended
	Oct. 26, 2018	Jul. 27, 2018	Oct. 07, 2016	Sep. 29, 2018	Apr. 01, 2017	Dec. 31, 2016	Sep. 04, 2012
Loss Contingencies [Line Items]
Assessed damages							$ 4,000,000
Plaintiff statutory damages offer, individual basis			$ 25
Litigation settlement amount					$ 8,500,000
Litigation settlement expense				$ 34,800,000		$ 9,200,000
Smith & Nephew vs. Interlace Medical, Inc. \| Subsequent Event \| Settled Litigation
Loss Contingencies [Line Items]
Paid damages	$ 34,800,000
Company Vs. Minerva Surgical, Inc. \| Judicial Ruling
Loss Contingencies [Line Items]
Awarded damages		$ 4,800,000