Operating Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Disclosures related to operating segments
Revenue	$ 9,596,615	$ 8,815,769	$ 7,854,459
Gross margin	4,686,416	4,173,368	3,632,246
Selling and administrative expenses	2,617,783	2,370,704	2,044,876
Operating income	2,068,633	1,802,664	1,587,370
Depreciation and amortization	442,384	409,162	399,701
Capital expenditures	409,469	331,109	240,672
Total assets	9,168,817	8,546,356	8,147,256
Uniform Rental and Facility Services
Disclosures related to operating segments
Revenue	7,465,199	6,897,130	6,226,980
First Aid and Safety Services
Disclosures related to operating segments
Revenue	1,067,334	951,496	832,458
Operating Segments | Uniform Rental and Facility Services
Disclosures related to operating segments
Revenue	7,465,199	6,897,130	6,226,980
Gross margin	3,600,128	3,264,955	2,910,547
Selling and administrative expenses	1,940,627	1,786,198	1,557,057
Operating income	1,659,501	1,478,757	1,353,490
Depreciation and amortization	340,426	326,185	329,473
Capital expenditures	261,225	227,436	166,559
Total assets	7,503,043	7,176,257	6,979,731
Operating Segments | First Aid and Safety Services
Disclosures related to operating segments
Revenue	1,067,334	951,496	832,458
Gross margin	592,656	482,088	372,193
Selling and administrative expenses	353,503	301,398	265,430
Operating income	239,153	180,690	106,763
Depreciation and amortization	81,342	62,059	48,656
Capital expenditures	100,025	76,549	59,656
Total assets	730,003	703,226	664,040
Operating Segments | All Other
Disclosures related to operating segments
Revenue	1,064,082	967,143	795,021
Gross margin	493,632	426,325	349,506
Selling and administrative expenses	323,653	283,108	222,389
Operating income	169,979	143,217	127,117
Depreciation and amortization	20,616	20,918	21,572
Capital expenditures	48,219	27,124	14,457
Total assets	593,756	542,724	413,014
Corporate
Disclosures related to operating segments
Revenue	0	0	0
Gross margin	0	0	0
Selling and administrative expenses	0	0	0
Operating income	0	0	0
Depreciation and amortization	0	0	0
Capital expenditures	0	0	0
Total assets	$ 342,015	$ 124,149	$ 90,471