Supplemental Guarantor Information (Condensed Consolidating Income Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended									12 Months Ended
	May 31, 2014		Feb. 28, 2014	Nov. 30, 2013	Aug. 31, 2013	May 31, 2013	Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2014	May 31, 2013	May 31, 2012
Revenue:
Rental uniforms and ancillary products										$ 3,223,930	$ 3,044,587	$ 2,912,261
Other services										1,327,882	1,271,884	1,189,739
Equity in net income of affiliates										0	0	0
Total revenue	1,157,479	[1]	1,130,237	1,143,753	1,120,343	1,129,086	1,075,674	1,060,386	1,051,325	4,551,812	4,316,471	4,102,000
Costs and expenses (income):
Cost of rental uniforms and ancillary products										1,829,427	1,756,297	1,648,551
Cost of other services										807,999	773,107	714,841
Selling and administrative expenses										1,302,752	1,221,856	1,198,981
Shredding transaction asset impairment charge										16,143	0	0
Shredding transaction costs	26,300		2,200							28,481	0	0
Operating income										567,010	565,211	539,627
Gain (loss) on Shredding deconsolidation										106,441	0	0
Interest income										(229)	(409)	(1,942)
Interest expense (income)										65,822	65,712	70,625
Income before income taxes										607,858	499,908	470,944
Income taxes										233,416	184,466	173,307
Net income	127,224	[1]	84,602	84,862	77,754	85,977	74,705	78,027	76,733	374,442	315,442	297,637
Cintas Corporation [Member]
Revenue:
Rental uniforms and ancillary products										0	0	0
Other services										0	0	0
Equity in net income of affiliates										374,442	315,442	297,637
Total revenue										374,442	315,442	297,637
Costs and expenses (income):
Cost of rental uniforms and ancillary products										0	0	0
Cost of other services										0	0	0
Selling and administrative expenses										0	0	0
Shredding transaction asset impairment charge										0
Shredding transaction costs										0
Operating income										374,442	315,442	297,637
Gain (loss) on Shredding deconsolidation										0
Interest income										0	0	0
Interest expense (income)										0	0	0
Income before income taxes										374,442	315,442	297,637
Income taxes										0	0	0
Net income										374,442	315,442	297,637
Corp. 2 [Member]
Revenue:
Rental uniforms and ancillary products										2,460,666	2,314,386	2,233,085
Other services										1,637,193	1,587,000	1,488,163
Equity in net income of affiliates										0	0	0
Total revenue										4,097,859	3,901,386	3,721,248
Costs and expenses (income):
Cost of rental uniforms and ancillary products										1,520,893	1,454,791	1,386,320
Cost of other services										1,056,366	1,016,074	955,148
Selling and administrative expenses										1,303,186	1,210,755	1,184,888
Shredding transaction asset impairment charge										0
Shredding transaction costs										0
Operating income										217,414	219,766	194,892
Gain (loss) on Shredding deconsolidation										111,661
Interest income										(43)	(40)	(111,631)
Interest expense (income)										66,461	66,584	72,212
Income before income taxes										262,657	153,222	234,311
Income taxes										100,394	54,474	68,752
Net income										162,263	98,748	165,559
Subsidiary Guarantors [Member]
Revenue:
Rental uniforms and ancillary products										663,512	616,726	574,950
Other services										31,512	31,210	28,660
Equity in net income of affiliates										0	0	0
Total revenue										695,024	647,936	603,610
Costs and expenses (income):
Cost of rental uniforms and ancillary products										417,388	392,134	362,803
Cost of other services										(14,261)	(12,694)	(13,649)
Selling and administrative expenses										(83,763)	(66,640)	(69,882)
Shredding transaction asset impairment charge										16,143
Shredding transaction costs										28,481
Operating income										331,036	335,136	324,338
Gain (loss) on Shredding deconsolidation										0
Interest income										(178)	(272)	(589)
Interest expense (income)										(635)	(875)	(1,543)
Income before income taxes										331,849	336,283	326,470
Income taxes										126,840	119,556	95,793
Net income										205,009	216,727	230,677
Non-Guarantors [Member]
Revenue:
Rental uniforms and ancillary products										220,969	220,946	210,683
Other services										131,581	124,234	117,791
Equity in net income of affiliates										0	0	0
Total revenue										352,550	345,180	328,474
Costs and expenses (income):
Cost of rental uniforms and ancillary products										153,726	155,490	145,293
Cost of other services										80,385	77,103	73,130
Selling and administrative expenses										101,432	97,646	(145,953)
Shredding transaction asset impairment charge										0
Shredding transaction costs										0
Operating income										17,007	14,941	256,004
Gain (loss) on Shredding deconsolidation										(5,220)
Interest income										(15,279)	(28,334)	(190,345)
Interest expense (income)										(4)	3	(44)
Income before income taxes										27,070	43,272	446,393
Income taxes										6,261	10,479	8,814
Net income										20,809	32,793	437,579
Eliminations [Member]
Revenue:
Rental uniforms and ancillary products										(121,217)	(107,471)	(106,457)
Other services										(472,404)	(470,560)	(444,875)
Equity in net income of affiliates										(374,442)	(315,442)	(297,637)
Total revenue										(968,063)	(893,473)	(848,969)
Costs and expenses (income):
Cost of rental uniforms and ancillary products										(262,580)	(246,118)	(245,865)
Cost of other services										(314,491)	(307,376)	(299,788)
Selling and administrative expenses										(18,103)	(19,905)	229,928
Shredding transaction asset impairment charge										0
Shredding transaction costs										0
Operating income										(372,889)	(320,074)	(533,244)
Gain (loss) on Shredding deconsolidation										0
Interest income										15,271	28,237	300,623
Interest expense (income)										0	0	0
Income before income taxes										(388,160)	(348,311)	(833,867)
Income taxes										(79)	(43)	(52)
Net income										$ (388,081)	$ (348,268)	$ (833,815)

[1] On April 30, 2014, Cintas completed its previously announced partnership transaction with the shareholders of Shred-it to combine Cintas’ document destruction business with Shred-it’s document destruction business. Under the agreement, Cintas and Shred-it each contributed its document destruction business to a newly formed partnership owned 42% by Cintas and 58% by the shareholders of Shred-it. The deconsolidation of the document destruction business negatively impacted fiscal 2014 fourth quarter revenue. In the fourth quarter of fiscal 2014, the Company realized a $106.4 million gain on deconsolidation of the shredding business. In addition, as a result of the shredding transaction, the Company recorded an asset impairment charge of $16.1 million in the fourth quarter of fiscal 2014. The Company also recorded transaction costs of $28.5 million, of which $2.2 million was recorded in the third quarter and $26.3 million was recorded in the fourth quarter. Please see Note 9 entitled Acquisitions and Deconsolidation for additional information on the transaction.