Operating Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2025	May 31, 2024	May 31, 2023
Disclosures related to operating segments
Revenue	$ 10,340,181	$ 9,596,615	$ 8,815,769
Cost of sales	5,166,017	4,910,199	4,642,401
Gross margin	5,174,164	4,686,416	4,173,368
Selling and administrative expenses	2,814,438	2,617,783	2,370,704
Operating income	2,359,726	2,068,633	1,802,664
Depreciation and amortization	494,183	442,384	409,162
Capital expenditures	408,884	409,469	331,109
Total assets	9,825,241	9,168,817	8,546,356
Uniform Rental and Facility Services
Disclosures related to operating segments
Revenue	7,976,073	7,465,199	6,897,130
First Aid and Safety Services
Disclosures related to operating segments
Revenue	1,218,090	1,067,334	951,496
Operating Segments | Uniform Rental and Facility Services
Disclosures related to operating segments
Revenue	7,976,073	7,465,199	6,897,130
Cost of sales	4,040,888	3,865,071	3,632,175
Gross margin	3,935,185	3,600,128	3,264,955
Selling and administrative expenses	2,061,795	1,940,627	1,786,198
Operating income	1,873,390	1,659,501	1,478,757
Depreciation and amortization	385,360	340,426	326,185
Capital expenditures	301,624	261,225	227,436
Total assets	7,993,720	7,503,043	7,176,257
Operating Segments | First Aid and Safety Services
Disclosures related to operating segments
Revenue	1,218,090	1,067,334	951,496
Cost of sales	521,480	474,678	469,408
Gross margin	696,610	592,656	482,088
Selling and administrative expenses	401,882	353,503	301,398
Operating income	294,728	239,153	180,690
Depreciation and amortization	86,286	81,342	62,059
Capital expenditures	55,447	100,025	76,549
Total assets	810,188	730,003	703,226
Operating Segments | All Other
Disclosures related to operating segments
Revenue	1,146,018	1,064,082	967,143
Cost of sales	603,649	570,450	540,818
Gross margin	542,369	493,632	426,325
Selling and administrative expenses	350,761	323,653	283,108
Operating income	191,608	169,979	143,217
Depreciation and amortization	22,537	20,616	20,918
Capital expenditures	51,813	48,219	27,124
Total assets	757,360	593,756	542,724
Corporate
Disclosures related to operating segments
Revenue	0	0	0
Cost of sales	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	$ 263,973	$ 342,015	$ 124,149