Supplemental Guarantor Information (Condensed Consolidating Income Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Revenue:
Rental uniforms and ancillary products	$ 801,702	$ 748,887	$ 2,398,884	$ 2,259,569
Other services	328,535	326,787	995,449	927,816
Equity in net income of affiliates	0	0	0	0
Total revenue	1,130,237	1,075,674	3,394,333	3,187,385
Costs and expenses (income):
Cost of rental uniforms and ancillary products	450,086	434,809	1,363,929	1,301,859
Cost of other services	201,026	198,924	608,380	565,674
Selling and administrative expenses	328,963	308,918	978,820	908,512
Operating income	150,162	133,023	443,204	411,340
Interest income	(44)	(132)	(196)	(358)
Interest expense (income)	16,418	16,302	49,426	49,194
Income before income taxes	133,788	116,853	393,974	362,504
Income taxes	49,186	42,148	146,756	133,039
Net income	84,602	74,705	247,218	229,465
Cintas Corporation
Revenue:
Rental uniforms and ancillary products	0	0	0	0
Other services	0	0	0	0
Equity in net income of affiliates	84,602	74,705	247,218	229,465
Total revenue	84,602	74,705	247,218	229,465
Costs and expenses (income):
Cost of rental uniforms and ancillary products	0	0	0	0
Cost of other services	0	0	0	0
Selling and administrative expenses	0	0	0	0
Operating income	84,602	74,705	247,218	229,465
Interest income	0	0	0	0
Interest expense (income)	0	0	0	0
Income before income taxes	84,602	74,705	247,218	229,465
Income taxes	0	0	0	0
Net income	84,602	74,705	247,218	229,465
Corp. 2
Revenue:
Rental uniforms and ancillary products	608,699	565,731	1,829,199	1,717,290
Other services	395,020	394,957	1,219,127	1,151,628
Equity in net income of affiliates	0	0	0	0
Total revenue	1,003,719	960,688	3,048,326	2,868,918
Costs and expenses (income):
Cost of rental uniforms and ancillary products	378,548	367,447	1,152,482	1,099,289
Cost of other services	255,282	247,942	788,287	740,797
Selling and administrative expenses	316,755	295,643	939,937	866,546
Operating income	53,134	49,656	167,620	162,286
Interest income	(12)	(2)	(31)	(33)
Interest expense (income)	16,407	16,480	49,355	49,323
Income before income taxes	36,739	33,178	118,296	112,996
Income taxes	13,387	9,981	43,991	39,236
Net income	23,352	23,197	74,305	73,760
Subsidiary Guarantors
Revenue:
Rental uniforms and ancillary products	165,657	151,595	493,207	457,183
Other services	8,929	9,679	26,643	31,188
Equity in net income of affiliates	0	0	0	0
Total revenue	174,586	161,274	519,850	488,371
Costs and expenses (income):
Cost of rental uniforms and ancillary products	95,138	85,481	290,136	269,837
Cost of other services	(2,715)	2,733	(8,917)	(6,633)
Selling and administrative expenses	(9,137)	(4,592)	(24,961)	(15,754)
Operating income	91,300	77,652	263,592	240,921
Interest income	(31)	(86)	(156)	(247)
Interest expense (income)	17	(175)	78	(126)
Income before income taxes	91,314	77,913	263,670	241,294
Income taxes	33,376	23,901	98,053	83,784
Net income	57,938	54,012	165,617	157,510
Non-Guarantors
Revenue:
Rental uniforms and ancillary products	55,134	55,906	166,203	165,060
Other services	31,231	31,950	97,401	90,292
Equity in net income of affiliates	0	0	0	0
Total revenue	86,365	87,856	263,604	255,352
Costs and expenses (income):
Cost of rental uniforms and ancillary products	37,499	39,108	115,520	114,651
Cost of other services	18,932	19,605	59,152	55,877
Selling and administrative expenses	25,776	24,972	77,472	72,978
Operating income	4,158	4,171	11,460	11,846
Interest income	(583)	(44)	(15,279)	(78)
Interest expense (income)	(6)	(3)	(7)	(3)
Income before income taxes	4,747	4,218	26,746	11,927
Income taxes	2,438	8,272	4,771	10,042
Net income	2,309	(4,054)	21,975	1,885
Eliminations
Revenue:
Rental uniforms and ancillary products	(27,788)	(24,345)	(89,725)	(79,964)
Other services	(106,645)	(109,799)	(347,722)	(345,292)
Equity in net income of affiliates	(84,602)	(74,705)	(247,218)	(229,465)
Total revenue	(219,035)	(208,849)	(684,665)	(654,721)
Costs and expenses (income):
Cost of rental uniforms and ancillary products	(61,099)	(57,227)	(194,209)	(181,918)
Cost of other services	(70,473)	(71,356)	(230,142)	(224,367)
Selling and administrative expenses	(4,431)	(7,105)	(13,628)	(15,258)
Operating income	(83,032)	(73,161)	(246,686)	(233,178)
Interest income	582	0	15,270	0
Interest expense (income)	0	0	0	0
Income before income taxes	(83,614)	(73,161)	(261,956)	(233,178)
Income taxes	(15)	(6)	(59)	(23)
Net income	$ (83,599)	$ (73,155)	$ (261,897)	$ (233,155)