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Revenue Recognition - Disaggregated Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 7,854,459	$ 7,116,340	$ 7,085,120
Uniform Rental and Facility Services
Disaggregation of Revenue [Line Items]
Revenue	6,226,980	5,689,632	5,643,494
First Aid and Safety Services
Disaggregation of Revenue [Line Items]
Revenue	832,458	784,291	708,569
Fire Protection Services
Disaggregation of Revenue [Line Items]
Revenue	527,517	446,441	422,688
Uniform Direct Sales
Disaggregation of Revenue [Line Items]
Revenue	$ 267,504	$ 195,976	$ 310,369
Product concentration risk | Revenue from Contract with Customer Benchmark
Disaggregation of Revenue [Line Items]
Percentage of revenue	100.00%	100.00%	100.00%
Product concentration risk | Revenue from Contract with Customer Benchmark | Uniform Rental and Facility Services
Disaggregation of Revenue [Line Items]
Percentage of revenue	79.30%	80.00%	79.60%
Product concentration risk | Revenue from Contract with Customer Benchmark | First Aid and Safety Services
Disaggregation of Revenue [Line Items]
Percentage of revenue	10.60%	11.00%	10.00%
Product concentration risk | Revenue from Contract with Customer Benchmark | Fire Protection Services
Disaggregation of Revenue [Line Items]
Percentage of revenue	6.70%	6.30%	6.00%
Product concentration risk | Revenue from Contract with Customer Benchmark | Uniform Direct Sales
Disaggregation of Revenue [Line Items]
Percentage of revenue	3.40%	2.70%	4.40%

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