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Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Aug. 31, 2019 | Aug. 25, 2018 | Aug. 26, 2017
Goodwill [Line Items] |  |  |
Impairment losses related to goodwill or intangible assets | $ 0 | $ 0 | $ 0
Goodwill | 401,178,000 | $ 397,422,000 | $ 376,110,000
US and Canadian Rental and Cleaning |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 385,800,000 |  |
Specialty Garments |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 11,000,000 |  |
First Aid |  |  |
Goodwill [Line Items] |  |  |
Goodwill | $ 4,400,000 |  |

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- Definition 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. + References Reference 1: 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=77989000&loc=SL49117168-202975 Reference 2: 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 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition 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. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Period Type: |