Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	May 31, 2022
Segment Reporting Information
Revenue	$ 2,166,454	$ 1,896,950
Income (loss) before income taxes	412,555	372,303
Total assets	8,261,026	7,857,750	$ 8,147,256
Uniform Rental and Facility Services
Segment Reporting Information
Revenue	1,697,772	1,508,176
First Aid and Safety Services
Segment Reporting Information
Revenue	234,161	199,116
Operating Segments | Uniform Rental and Facility Services
Segment Reporting Information
Revenue	1,697,772	1,508,176
Income (loss) before income taxes	364,771	329,382
Total assets	7,036,979	6,770,296
Operating Segments | First Aid and Safety Services
Segment Reporting Information
Revenue	234,161	199,116
Income (loss) before income taxes	40,846	25,728
Total assets	680,864	636,829
Operating Segments | All Other
Segment Reporting Information
Revenue	234,521	189,658
Income (loss) before income taxes	34,503	38,991
Total assets	468,625	370,876
Corporate
Segment Reporting Information
Revenue	0	0
Income (loss) before income taxes	(27,565)	(21,798)
Total assets	$ 74,558	$ 79,749