Significant Accounting Policies (Tables)

12 Months Ended

May 31, 2018

Accounting Policies [Abstract]

Schedule of Inventory

Inventory is comprised of the following amounts at May 31:

(In thousands)	2018		2017
Raw materials	$	17,042	$	17,528
Work in process	27,350		17,951
Finished goods	235,955		242,739
	$	280,347	$	278,218

Property and Equipment Estimated Useful Lives

Depreciation is calculated using the straight-line method primarily over the following estimated useful lives of the assets based on industry and Cintas specific experience, in years:

Buildings	30 to 40
Building improvements	5 to 20
Equipment	3 to 10
Leasehold improvements	2 to 15

Cintas' property and equipment is summarized as follows at May 31:

(In thousands)	2018		2017
Land	$	177,281	$	173,166
Buildings and improvements	644,322		624,615
Equipment	2,070,009		1,930,018
Leasehold improvements	34,891		32,679
Construction in progress	119,937		79,400
	3,046,440		2,839,878
Less: accumulated depreciation	1,663,710		1,516,377
	$	1,382,730	$	1,323,501

Current Accrued Liabilities

Current accrued liabilities include the following amounts at May 31:

(In thousands)	2018		2017
General insurance liabilities	$	163,400	$	153,743
Employee benefit related liabilities	112,801		110,104
Taxes and related liabilities	8,148		8,057
Accrued interest	24,763		36,638
Other	111,017		121,267
	$	420,129	$	429,809