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Revenue Recognition - Schedule of Sources of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Feb. 28, 2019 | Feb. 28, 2018 | Feb. 28, 2019 | Feb. 28, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | $ 1,682,330 | $ 1,589,138 | $ 5,098,573 | $ 4,807,082
Uniform Rental and Facility Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 1,358,322 | 1,284,516 | 4,124,038 | 3,904,338
First Aid and Safety Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 149,170 | 137,327 | 455,935 | 416,999
Fire Protection Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | 99,688 | 87,498 | 293,980 | 254,994
Uniform Direct Sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net Sales | $ 75,150 | $ 79,797 | $ 224,620 | $ 230,751
Revenue Recognized under Topic 840 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Concentration risk (as a percent) | 100.00% | 100.00% | 100.00% | 100.00%
Revenue Recognized under Topic 840 | Uniform Rental and Facility Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Concentration risk (as a percent) | 80.70% | 80.80% | 80.90% | 81.20%
Revenue Recognized under Topic 840 | First Aid and Safety Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Concentration risk (as a percent) | 8.90% | 8.70% | 8.90% | 8.70%
Revenue Recognized under Topic 840 | Fire Protection Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Concentration risk (as a percent) | 5.90% | 5.50% | 5.80% | 5.30%
Revenue Recognized under Topic 840 | Uniform Direct Sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Concentration risk (as a percent) | 4.50% | 5.00% | 4.40% | 4.80%

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