Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)	12 Months Ended
	Aug. 28, 2021	Aug. 29, 2020	Aug. 31, 2019
Goodwill [Line Items]
Impairment losses related to goodwill or intangible assets	$ 0	$ 0	$ 0
Goodwill	429,538,000	$ 424,844,000	$ 401,178,000
US and Canadian Rental and Cleaning
Goodwill [Line Items]
Goodwill	418,000,000.0
Specialty Garments
Goodwill [Line Items]
Goodwill	10,900,000
First Aid
Goodwill [Line Items]
Goodwill	$ 600,000