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Revenue Recognition - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 30, 2021 | Nov. 30, 2020 | Nov. 30, 2021 | Nov. 30, 2020 | May 31, 2021
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Deferred commissions, current | $ 81.3 |  | $ 81.3 |  | $ 79.4
Deferred commissions, noncurrent | 228.9 |  | 228.9 |  | $ 227.1
Amortization of deferred commissions | $ 21.7 | $ 20.7 | $ 43.1 | $ 41.1 |
Revenue | Product Concentration Risk |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percentage of revenue | 100.00% | 100.00% | 100.00% | 100.00% |
Uniform Rental and Facility Services, First Aid and Safety Services and Fire Protection Services | Revenue | Product Concentration Risk | Route Servicing Fees |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percentage of revenue |  |  | 95.00% |  |
Uniform Direct Sales | Revenue | Product Concentration Risk |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percentage of revenue | 3.20% | 2.70% | 3.20% | 2.50% |
Uniform Direct Sales | Revenue | Product Concentration Risk | Other |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Percentage of revenue |  |  | 5.00% |  |

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