Supplemental Guarantor Information - Consolidating Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
Aug. 31, 2017	Aug. 31, 2016
Condensed Consolidating Financial Statements
Net income	$ 217,211	$ 138,091
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	35,184	115
Change in fair value of cash flow hedges	0	(12,037)
Amortization of interest rate lock agreements	(172)	385
Change in fair value of available-for-sale securities	20	(1)
Other comprehensive income (loss)	35,032	(11,538)
Comprehensive income	252,243	126,553
Eliminations
Condensed Consolidating Financial Statements
Net income	(214,406)	(135,265)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(35,184)	(115)
Change in fair value of cash flow hedges		12,037
Amortization of interest rate lock agreements	172	(385)
Change in fair value of available-for-sale securities	(20)	1
Other comprehensive income (loss)	(35,032)	11,538
Comprehensive income	(249,438)	(123,727)
Cintas Corporation
Condensed Consolidating Financial Statements
Net income	217,211	138,091
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	35,184	115
Change in fair value of cash flow hedges		(12,037)
Amortization of interest rate lock agreements	(172)	385
Change in fair value of available-for-sale securities	20	(1)
Other comprehensive income (loss)	35,032	(11,538)
Comprehensive income	252,243	126,553
Corp. 2
Condensed Consolidating Financial Statements
Net income	118,530	43,871
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	0	0
Change in fair value of cash flow hedges		(12,037)
Amortization of interest rate lock agreements	(172)	385
Change in fair value of available-for-sale securities	0	0
Other comprehensive income (loss)	(172)	(11,652)
Comprehensive income	118,358	32,219
Subsidiary Guarantors
Condensed Consolidating Financial Statements
Net income	87,171	87,515
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	0	0
Change in fair value of cash flow hedges		0
Amortization of interest rate lock agreements	0	0
Change in fair value of available-for-sale securities	0	0
Other comprehensive income (loss)	0	0
Comprehensive income	87,171	87,515
Non- Guarantors
Condensed Consolidating Financial Statements
Net income	8,705	3,879
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	35,184	115
Change in fair value of cash flow hedges		0
Amortization of interest rate lock agreements	0	0
Change in fair value of available-for-sale securities	20	(1)
Other comprehensive income (loss)	35,204	114
Comprehensive income	$ 43,909	$ 3,993

Other Comprehensive Income (Loss), Amortization of Interest Rate Lock Agreements, Net of Tax

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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