Supplemental Guarantor Information (Condensed Consolidating Income Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Revenue:
Rental uniforms and ancillary products	$ 856,872	$ 792,866
Other services	245,205	307,380
Equity in net income of affiliates	0	0
Total revenue	1,102,077	1,100,246
Costs and expenses (income):
Cost of rental uniforms and ancillary products	470,609	454,731
Cost of other services	153,522	189,420
Selling and administrative expenses	314,458	316,483
Operating income	163,488	139,612
Gain on deconsolidation of Shredding business	(6,619)	0
Gain on sale of stock of an equity method investment	(21,739)	0
Interest income	(53)	(68)
Interest expense	16,583	16,523
Income before income taxes	175,316	123,157
Income taxes	65,525	45,759
Income from continuing operations	109,791	77,398
Income from discontinued operations, net of tax	317	356
Net income	110,108	77,754
Cintas Corporation
Revenue:
Rental uniforms and ancillary products	0	0
Other services	0	0
Equity in net income of affiliates	109,791	77,398
Total revenue	109,791	77,398
Costs and expenses (income):
Cost of rental uniforms and ancillary products	0	0
Cost of other services	0	0
Selling and administrative expenses	0	0
Operating income	109,791	77,398
Gain on deconsolidation of Shredding business	0
Gain on sale of stock of an equity method investment	0
Interest income	0	0
Interest expense	0	0
Income before income taxes	109,791	77,398
Income taxes	0	0
Income from continuing operations	109,791	77,398
Income from discontinued operations, net of tax	317	356
Net income	110,108	77,754
Corp. 2
Revenue:
Rental uniforms and ancillary products	658,987	605,758
Other services	343,367	395,193
Equity in net income of affiliates	0	0
Total revenue	1,002,354	1,000,951
Costs and expenses (income):
Cost of rental uniforms and ancillary products	398,272	383,719
Cost of other services	228,239	256,239
Selling and administrative expenses	314,003	304,105
Operating income	61,840	56,888
Gain on deconsolidation of Shredding business	(6,619)
Gain on sale of stock of an equity method investment	0
Interest income	(5)	(8)
Interest expense	16,409	16,480
Income before income taxes	52,055	40,416
Income taxes	19,278	14,989
Income from continuing operations	32,777	25,427
Income from discontinued operations, net of tax	373	254
Net income	33,150	25,681
Subsidiary Guarantors
Revenue:
Rental uniforms and ancillary products	176,706	162,565
Other services	6,956	8,549
Equity in net income of affiliates	0	0
Total revenue	183,662	171,114
Costs and expenses (income):
Cost of rental uniforms and ancillary products	104,159	98,167
Cost of other services	(5,149)	(3,123)
Selling and administrative expenses	(12,954)	(4,859)
Operating income	97,606	80,929
Gain on deconsolidation of Shredding business	0
Gain on sale of stock of an equity method investment	(21,739)
Interest income	(48)	(53)
Interest expense	170	44
Income before income taxes	119,223	80,938
Income taxes	44,207	29,981
Income from continuing operations	75,016	50,957
Income from discontinued operations, net of tax	0	0
Net income	75,016	50,957
Non-Guarantors
Revenue:
Rental uniforms and ancillary products	56,281	54,965
Other services	17,324	20,669
Equity in net income of affiliates	0	0
Total revenue	73,605	75,634
Costs and expenses (income):
Cost of rental uniforms and ancillary products	37,976	38,556
Cost of other services	11,267	13,220
Selling and administrative expenses	19,074	21,442
Operating income	5,288	2,416
Gain on deconsolidation of Shredding business	0
Gain on sale of stock of an equity method investment	0
Interest income	0	(14,694)
Interest expense	4	(1)
Income before income taxes	5,284	17,111
Income taxes	2,051	819
Income from continuing operations	3,233	16,292
Income from discontinued operations, net of tax	(56)	102
Net income	3,177	16,394
Eliminations
Revenue:
Rental uniforms and ancillary products	(35,102)	(30,422)
Other services	(122,442)	(117,031)
Equity in net income of affiliates	(109,791)	(77,398)
Total revenue	(267,335)	(224,851)
Costs and expenses (income):
Cost of rental uniforms and ancillary products	(69,798)	(65,711)
Cost of other services	(80,835)	(76,916)
Selling and administrative expenses	(5,665)	(4,205)
Operating income	(111,037)	(78,019)
Gain on deconsolidation of Shredding business	0
Gain on sale of stock of an equity method investment	0
Interest income	0	14,687
Interest expense	0	0
Income before income taxes	(111,037)	(92,706)
Income taxes	(11)	(30)
Income from continuing operations	(111,026)	(92,676)
Income from discontinued operations, net of tax	(317)	(356)
Net income	$ (111,343)	$ (93,032)