XML 67 R41.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Goodwill, Service Contracts and Other Assets - Changes in Carrying Amount of Service Contracts (Details) $ in Thousands | 3 Months Ended
--- | ---
Aug. 31, 2015 USD ($)
Service contracts [Roll Forward] |
Balance as of June 1, 2015 | $ 42,434
Service contracts acquired | 35,910
Service contracts amortization | (3,038)
Balance as of August 31, 2015 | 75,306
Uniform Rental and Facility Services |
Service contracts [Roll Forward] |
Balance as of June 1, 2015 | 6,677
Service contracts acquired | 0
Service contracts amortization | (1,088)
Balance as of August 31, 2015 | 5,589
First Aid and Safety Services |
Service contracts [Roll Forward] |
Balance as of June 1, 2015 | 1,576
Service contracts acquired | 34,970
Service contracts amortization | (439)
Balance as of August 31, 2015 | 36,107
All Other |
Service contracts [Roll Forward] |
Balance as of June 1, 2015 | 34,181
Service contracts acquired | 940
Service contracts amortization | (1,511)
Balance as of August 31, 2015 | $ 33,610

X
- Definition Amount of reduction of finite-lived intangible assets due to amortization during the period. + References No definition available. + Details
Name: | ctas_FiniteLivedIntangibleAssetsAmortization
Namespace Prefix: | ctas_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination. + References No definition available. + Details
Name: | us-gaap_FinitelivedIntangibleAssetsAcquired1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ctas_UniformRentalandFacilityServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ctas_FirstAidandSafetyServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |