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Revenue Recognition (Tables)
 6 Months Ended
Nov. 30, 2021
Revenue from Contract with Customer [Abstract]  
Total Revenue Disaggregated by Operating Segment
The following table presents Cintas' total revenue disaggregated by operating segment:
Three Months EndedSix Months Ended
(In thousands)November 30,
2021		November 30,
2020		November 30,
2021		November 30,
2020
Uniform Rental and
   Facility Services		$1,535,271 79.9 %$1,410,488 80.3 %$3,043,447 79.7 %$2,804,899 80.0 %
First Aid and Safety
   Services		202,160 10.5 %194,419 11.0 %401,276 10.5 %398,899 11.4 %
Fire Protection
   Services		123,254 6.4 %104,636 6.0 %251,472 6.6 %212,701 6.1 %
Uniform Direct Sales61,596 3.2 %47,505 2.7 %123,036 3.2 %87,123 2.5 %
Total revenue$1,922,281 100.0 %$1,757,048 100.0 %$3,819,231 100.0 %$3,503,622 100.0 %