XML 70 R56.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Goodwill, Service Contracts and Other Assets - Information Regarding Service Contracts and Other Assets (Details) - USD ($) $ in Thousands | May 31, 2018 | May 31, 2017 | May 31, 2016
--- | --- | --- | ---
Information regarding service contracts and other assets |  |  |
Service contracts, net | $ 545,768 | $ 586,988 | $ 78,194
Other assets, carrying amount | 80,497 | 75,633 |
Other assets, accumulated amortization | 51,182 | 43,666 |
Other assets, net | 29,315 | 31,967 |
Noncompete and consulting agreements |  |  |
Information regarding service contracts and other assets |  |  |
Other assets, carrying amount | 41,710 | 40,743 |
Other assets, accumulated amortization | 39,877 | 39,244 |
Other assets, net | 1,833 | 1,499 |
Other |  |  |
Information regarding service contracts and other assets |  |  |
Other assets, carrying amount | 38,787 | 34,890 |
Other assets, accumulated amortization | 11,305 | 4,422 |
Other assets, net | 27,482 | 30,468 |
Service contracts |  |  |
Information regarding service contracts and other assets |  |  |
Service contracts, carrying amount | 924,978 | 911,273 |
Service contracts, accumulated amortization | 379,210 | 324,285 |
Service contracts, net | $ 545,768 | $ 586,988 |

X
- Definition This element represents the accumulated amortization of finite-lived assets and other noncurrent assets. + References No definition available. + Details
Name: | ctas_AccumulatedAmortizationOfOtherAssets
Namespace Prefix: | ctas_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition This element represents the gross carrying amount, as of the balance sheet date, of finite-lived assets and other noncurrent assets. + References No definition available. + Details
Name: | ctas_OtherAssetsGross
Namespace Prefix: | ctas_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | ctas_OtherAssetsLineItems
Namespace Prefix: | ctas_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of noncurrent assets classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_OtherAssetsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ctas_OtherAssetsAxis=us-gaap_NoncompeteAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ctas_OtherAssetsAxis=ctas_OtherMiscellaneousAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_ServiceAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |