Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Namespace Prefix:	us-gaap_
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Period Type:	duration

Changes in Equity - Additional Information (Detail) - Stock Repurchase - shares	Aug. 31, 2018	Sep. 27, 2017
Class Of Stock [Line Items]
Common Stock remaining shares authorized for repurchase	5,700,000
Maximum
Class Of Stock [Line Items]
Common Stock shares authorized for repurchase		6,828,855