Supplemental Guarantor Information - Consolidating Condensed Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2018	Aug. 31, 2017
Revenue:
Uniform rental and facility services	$ 1,374,938	$ 1,311,784
Other	323,037	299,719
Equity in net income of affiliates	0	0
Total revenue	1,697,975	1,611,503
Costs and expenses (income):
Cost of uniform rental and facility services	746,453	706,863
Cost of other	176,810	165,287
Selling and administrative expenses	504,634	486,283
G&K Services, Inc. integration expenses	4,850	3,971
Operating income	265,228	249,099
Interest income	(496)	(297)
Interest expense (income)	24,304	30,317
Income before income taxes	241,420	219,079
Income taxes	28,873	57,971
Income from continuing operations	212,547	161,108
Loss from discontinued operations, net of tax	(32)	56,103
Net income	212,515	217,211
Eliminations
Revenue:
Uniform rental and facility services	(47,037)	(49,575)
Other	(192,628)	(148,198)
Equity in net income of affiliates	(212,547)	(161,108)
Total revenue	(452,212)	(358,881)
Costs and expenses (income):
Cost of uniform rental and facility services	(70,851)	(74,821)
Cost of other	(160,636)	(118,698)
Selling and administrative expenses	(10,018)	(7,040)
G&K Services, Inc. integration expenses	0	0
Operating income	(210,707)	(158,322)
Interest income	1	0
Interest expense (income)	0	0
Income before income taxes	(210,708)	(158,322)
Income taxes	(21)	(19)
Income from continuing operations	(210,687)	(158,303)
Loss from discontinued operations, net of tax	32	(56,103)
Net income	(210,655)	(214,406)
Cintas Corporation
Revenue:
Uniform rental and facility services	0	0
Other	0	0
Equity in net income of affiliates	212,547	161,108
Total revenue	212,547	161,108
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. integration expenses	0	0
Operating income	212,547	161,108
Interest income	0	0
Interest expense (income)	0	0
Income before income taxes	212,547	161,108
Income taxes	0	0
Income from continuing operations	212,547	161,108
Loss from discontinued operations, net of tax	(32)	56,103
Net income	212,515	217,211
Corp. 2
Revenue:
Uniform rental and facility services	1,139,129	1,099,869
Other	491,290	427,302
Equity in net income of affiliates	0	0
Total revenue	1,630,419	1,527,171
Costs and expenses (income):
Cost of uniform rental and facility services	643,741	622,148
Cost of other	341,333	288,919
Selling and administrative expenses	544,910	510,955
G&K Services, Inc. integration expenses	2,676	1,521
Operating income	97,759	103,628
Interest income	(209)	(31)
Interest expense (income)	24,661	30,561
Income before income taxes	73,307	73,098
Income taxes	10,663	19,570
Income from continuing operations	62,644	53,528
Loss from discontinued operations, net of tax	(32)	65,002
Net income	62,612	118,530
Subsidiary Guarantors
Revenue:
Uniform rental and facility services	183,163	164,895
Other	43	307
Equity in net income of affiliates	0	0
Total revenue	183,206	165,202
Costs and expenses (income):
Cost of uniform rental and facility services	109,550	99,019
Cost of other	(22,029)	(19,669)
Selling and administrative expenses	(64,621)	(47,538)
G&K Services, Inc. integration expenses	1,863	2,435
Operating income	158,443	130,955
Interest income	(272)	(99)
Interest expense (income)	(362)	(139)
Income before income taxes	159,077	131,193
Income taxes	16,044	35,123
Income from continuing operations	143,033	96,070
Loss from discontinued operations, net of tax	0	(8,899)
Net income	143,033	87,171
Non- Guarantors
Revenue:
Uniform rental and facility services	99,683	96,595
Other	24,332	20,308
Equity in net income of affiliates	0	0
Total revenue	124,015	116,903
Costs and expenses (income):
Cost of uniform rental and facility services	64,013	60,517
Cost of other	18,142	14,735
Selling and administrative expenses	34,363	29,906
G&K Services, Inc. integration expenses	311	15
Operating income	7,186	11,730
Interest income	(16)	(167)
Interest expense (income)	5	(105)
Income before income taxes	7,197	12,002
Income taxes	2,187	3,297
Income from continuing operations	5,010	8,705
Loss from discontinued operations, net of tax	0	0
Net income	$ 5,010	$ 8,705