Supplemental Guarantor Information - Consolidating Condensed Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Revenue:
Uniform rental and facility services	$ 1,311,784	$ 994,282
Other	299,719	272,368
Equity in net income of affiliates	0	0
Total revenue	1,611,503	1,266,650
Costs and expenses (income):
Cost of uniform rental and facility services	706,863	537,097
Cost of other	165,287	153,126
Selling and administrative expenses	486,283	369,703
G&K Services, Inc. transaction and integration expenses	3,971	2,787
Operating income	249,099	203,937
Interest income	(297)	(65)
Interest expense (income)	30,317	14,172
Income before income taxes	219,079	189,830
Income taxes	57,971	53,622
Income from continuing operations	161,108	136,208
Income (loss) from discontinued operations, net of tax	56,103	1,883
Net income	217,211	138,091
Eliminations
Revenue:
Uniform rental and facility services	(49,575)	(44,489)
Other	(148,198)	(135,557)
Equity in net income of affiliates	(161,108)	(136,208)
Total revenue	(358,881)	(316,254)
Costs and expenses (income):
Cost of uniform rental and facility services	(74,821)	(65,910)
Cost of other	(118,698)	(109,497)
Selling and administrative expenses	(7,040)	(7,439)
G&K Services, Inc. transaction and integration expenses	0	0
Operating income	(158,322)	(133,408)
Interest income	0	0
Interest expense (income)	0	0
Income before income taxes	(158,322)	(133,408)
Income taxes	(19)	(26)
Income from continuing operations	(158,303)	(133,382)
Income (loss) from discontinued operations, net of tax	(56,103)	(1,883)
Net income	(214,406)	(135,265)
Cintas Corporation
Revenue:
Uniform rental and facility services	0	0
Other	0	0
Equity in net income of affiliates	161,108	136,208
Total revenue	161,108	136,208
Costs and expenses (income):
Cost of uniform rental and facility services	0	0
Cost of other	0	0
Selling and administrative expenses	0	0
G&K Services, Inc. transaction and integration expenses	0	0
Operating income	161,108	136,208
Interest income	0	0
Interest expense (income)	0	0
Income before income taxes	161,108	136,208
Income taxes	0	0
Income from continuing operations	161,108	136,208
Income (loss) from discontinued operations, net of tax	56,103	1,883
Net income	217,211	138,091
Corp. 2
Revenue:
Uniform rental and facility services	1,099,869	831,960
Other	427,302	388,082
Equity in net income of affiliates	0	0
Total revenue	1,527,171	1,220,042
Costs and expenses (income):
Cost of uniform rental and facility services	622,148	475,221
Cost of other	288,919	263,726
Selling and administrative expenses	510,955	407,611
G&K Services, Inc. transaction and integration expenses	1,521	0
Operating income	103,628	73,484
Interest income	(31)	0
Interest expense (income)	30,561	14,827
Income before income taxes	73,098	58,657
Income taxes	19,570	16,669
Income from continuing operations	53,528	41,988
Income (loss) from discontinued operations, net of tax	65,002	1,883
Net income	118,530	43,871
Subsidiary Guarantors
Revenue:
Uniform rental and facility services	164,895	149,148
Other	307	968
Equity in net income of affiliates	0	0
Total revenue	165,202	150,116
Costs and expenses (income):
Cost of uniform rental and facility services	99,019	90,672
Cost of other	(19,669)	(14,931)
Selling and administrative expenses	(47,538)	(50,734)
G&K Services, Inc. transaction and integration expenses	2,435	2,787
Operating income	130,955	122,322
Interest income	(99)	(17)
Interest expense (income)	(139)	(702)
Income before income taxes	131,193	123,041
Income taxes	35,123	35,526
Income from continuing operations	96,070	87,515
Income (loss) from discontinued operations, net of tax	(8,899)	0
Net income	87,171	87,515
Non- Guarantors
Revenue:
Uniform rental and facility services	96,595	57,663
Other	20,308	18,875
Equity in net income of affiliates	0	0
Total revenue	116,903	76,538
Costs and expenses (income):
Cost of uniform rental and facility services	60,517	37,114
Cost of other	14,735	13,828
Selling and administrative expenses	29,906	20,265
G&K Services, Inc. transaction and integration expenses	15	0
Operating income	11,730	5,331
Interest income	(167)	(48)
Interest expense (income)	(105)	47
Income before income taxes	12,002	5,332
Income taxes	3,297	1,453
Income from continuing operations	8,705	3,879
Income (loss) from discontinued operations, net of tax	0	0
Net income	$ 8,705	$ 3,879