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ACQUISITIONS AND DIVESTITURES Identifiable Intangible Assets and Estimated Useful Lives (Details) (Phoenix, USD $)
In Thousands, unless otherwise specified
 0 Months Ended
Nov. 01, 2012
Business Acquisition [Line Items]  
Identifiable intangible assets $ 130,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Customer Relationships  
Business Acquisition [Line Items]  
Estimated Life (years) 8 years
Identifiable intangible assets 129,800us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= chrw_PhoenixMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Noncompete Agreements  
Business Acquisition [Line Items]  
Estimated Life (years) 5 years
Identifiable intangible assets $ 200us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= chrw_PhoenixMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember