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
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

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. 29, 2020	Aug. 31, 2019	Aug. 25, 2018
Goodwill [Line Items]
Impairment losses related to goodwill or intangible assets	$ 0	$ 0	$ 0
Goodwill	424,844,000	$ 401,178,000	$ 397,422,000
US and Canadian Rental and Cleaning
Goodwill [Line Items]
Goodwill	413,200,000
Specialty Garments
Goodwill [Line Items]
Goodwill	11,000,000.0
First Aid
Goodwill [Line Items]
Goodwill	$ 600,000