Legal Proceedings Legal (Details) - USD ($) $ in Thousands		12 Months Ended
	Aug. 28, 2018	Apr. 28, 2018	Jul. 28, 2018
Loss Contingencies [Line Items]
Stock repurchased		$ 87,500
Class Action Complaints Against Henry Schein Inc., Benco Dental Supply Company And Patterson Companies, Inc.
Loss Contingencies [Line Items]
Litigation settlement reserve			$ 28,263
Kirsten Johnsen V. Scott P Anderson Et Al | Subsequent Event
Loss Contingencies [Line Items]
Stock repurchased	$ 412,800