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Revenue Recognition (Tables)
 12 Months Ended
May 31, 2020
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregated Revenue
The following table presents Cintas' total revenue disaggregated by service type for the fiscal years ended May 31:
202020192018
(In thousands)Revenue%Revenue%Revenue%
Uniform Rental and Facility Services$5,643,494  79.6 %$5,552,430  80.6 %$5,247,124  81.0 %
First Aid and Safety Services708,569  10.0 %619,470  9.0 %564,706  8.7 %
Fire Protection Services422,688  6.0 %405,467  5.9 %349,968  5.4 %
Uniform Direct Sales310,369  4.4 %314,936  4.5 %314,834  4.9 %
Total revenue$7,085,120  100.0 %$6,892,303  100.0 %$6,476,632  100.0 %