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v2.4.1.9

Goodwill, Service Contracts and Other Assets - Changes in Carrying Amount of Service Contracts (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended
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Nov. 30, 2014
Service contracts [Roll Forward] |
Balance as of June 1, 2014 | $ 55,675 us-gaap_FiniteLivedIntangibleAssetsNet
Service contracts acquired | 3,007 us-gaap_FinitelivedIntangibleAssetsAcquired1
Service contracts amortization | (5,806)ctas_FiniteLivedIntangibleAssetsAmortization
Service contracts divested in the Storage transactions | (9,570)ctas_FiniteLivedIntangibleAssetsDecreaseduetoDivestiture
Foreign currency translation | (1,716)us-gaap_FiniteLivedIntangibleAssetsTranslationAdjustments
Balance as of November 30, 2014 | 41,590 us-gaap_FiniteLivedIntangibleAssetsNet
Rental Uniforms and Ancillary Products |
Service contracts [Roll Forward] |
Balance as of June 1, 2014 | 17,171 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = ctas_RentalUniformsAndAncillaryProductsMember
Service contracts acquired | 313 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_StatementBusinessSegmentsAxis = ctas_RentalUniformsAndAncillaryProductsMember
Service contracts amortization | (1,679)ctas_FiniteLivedIntangibleAssetsAmortization / us-gaap_StatementBusinessSegmentsAxis = ctas_RentalUniformsAndAncillaryProductsMember
Service contracts divested in the Storage transactions | 0 ctas_FiniteLivedIntangibleAssetsDecreaseduetoDivestiture / us-gaap_StatementBusinessSegmentsAxis = ctas_RentalUniformsAndAncillaryProductsMember
Foreign currency translation | (1,148)us-gaap_FiniteLivedIntangibleAssetsTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = ctas_RentalUniformsAndAncillaryProductsMember
Balance as of November 30, 2014 | 14,657 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = ctas_RentalUniformsAndAncillaryProductsMember
Uniform Direct Sales |
Service contracts [Roll Forward] |
Balance as of June 1, 2014 | 0 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = ctas_UniformDirectSalesMember
Service contracts acquired | 0 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_StatementBusinessSegmentsAxis = ctas_UniformDirectSalesMember
Service contracts amortization | 0 ctas_FiniteLivedIntangibleAssetsAmortization / us-gaap_StatementBusinessSegmentsAxis = ctas_UniformDirectSalesMember
Service contracts divested in the Storage transactions | 0 ctas_FiniteLivedIntangibleAssetsDecreaseduetoDivestiture / us-gaap_StatementBusinessSegmentsAxis = ctas_UniformDirectSalesMember
Foreign currency translation | 0 us-gaap_FiniteLivedIntangibleAssetsTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = ctas_UniformDirectSalesMember
Balance as of November 30, 2014 | 0 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = ctas_UniformDirectSalesMember
First Aid, Safety and Fire Protection |
Service contracts [Roll Forward] |
Balance as of June 1, 2014 | 28,034 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = ctas_FirstAidSafetyAndFireProtectionMember
Service contracts acquired | 2,429 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_StatementBusinessSegmentsAxis = ctas_FirstAidSafetyAndFireProtectionMember
Service contracts amortization | (3,530)ctas_FiniteLivedIntangibleAssetsAmortization / us-gaap_StatementBusinessSegmentsAxis = ctas_FirstAidSafetyAndFireProtectionMember
Service contracts divested in the Storage transactions | 0 ctas_FiniteLivedIntangibleAssetsDecreaseduetoDivestiture / us-gaap_StatementBusinessSegmentsAxis = ctas_FirstAidSafetyAndFireProtectionMember
Foreign currency translation | 0 us-gaap_FiniteLivedIntangibleAssetsTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = ctas_FirstAidSafetyAndFireProtectionMember
Balance as of November 30, 2014 | 26,933 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = ctas_FirstAidSafetyAndFireProtectionMember
Corporate |
Service contracts [Roll Forward] |
Balance as of June 1, 2014 | 10,470 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember
Service contracts acquired | 265 us-gaap_FinitelivedIntangibleAssetsAcquired1 / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember
Service contracts amortization | (597)ctas_FiniteLivedIntangibleAssetsAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember
Service contracts divested in the Storage transactions | (9,570)ctas_FiniteLivedIntangibleAssetsDecreaseduetoDivestiture / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember
Foreign currency translation | (568)us-gaap_FiniteLivedIntangibleAssetsTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember
Balance as of November 30, 2014 | $ 0 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember

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