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Acquisitions - Narrative (Details) |  | 12 Months Ended
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Dec. 10, 2021 USD ($) | May 31, 2022 USD ($) reportingUnit | May 31, 2021 USD ($) reportingUnit | May 31, 2020 USD ($)
Business Acquisition [Line Items] |  |  |  |
Cash consideration transferred, net of cash acquired |  | $ 164,228,000 | $ 10,038,000 | $ 53,720,000
Gain on equity method investment transaction |  | $ 30,151,000 | $ 0 | $ 0
Amortization period | 9 years |  |  |
Uniform rental and facility services |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of businesses acquired | reportingUnit |  | 3 | 2 |
First Aid and Safety Services |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of businesses acquired | reportingUnit |  | 10 | 3 |
All Other |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of businesses acquired | reportingUnit |  | 7 | 5 |
Equity Method Investment |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash consideration transferred, net of cash acquired | $ 48,000,000 |  |  |
Cash acquired | 1,700,000 |  |  |
Equity interest in acquiree, fair value | 43,500,000 |  |  |
Gain on equity method investment transaction | 30,200,000 |  |  |
Goodwill deductible for tax purposes | $ 0 |  |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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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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- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126975305&loc=d3e6927-128479 + Details
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- Definition Fair value at acquisition-date of the equity interest in the acquiree held by the acquirer, immediately before the acquisition date for businesses combined in stages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g)(1) -URI https://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g)(2) -URI https://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585 + Details
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