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ACQUISITIONS AND DIVESTITURES - Additional Information (Detail) (USD $)
Share data in Millions, unless otherwise specified
12 Months Ended 0 Months Ended 3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Nov. 01, 2012
Oct. 16, 2012
Dec. 31, 2012
Oct. 01, 2012
Business Acquisition [Line Items]              
Gain on sale $ 1,848,000us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal $ 0us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal $ 281,551,000us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal        
Phoenix              
Business Acquisition [Line Items]              
Purchase consideration       677,273,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= chrw_PhoenixMember
     
Equity interest issued or issuable, value assigned       60,200,000us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned
/ us-gaap_BusinessAcquisitionAxis
= chrw_PhoenixMember
     
Equity interest issued or issuable, number of shares       1.1us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
/ us-gaap_BusinessAcquisitionAxis
= chrw_PhoenixMember
     
Acquisition price financed with debt       173,000,000chrw_BusinessAcquisitionAcquisitionPriceFinancedWithDebt
/ us-gaap_BusinessAcquisitionAxis
= chrw_PhoenixMember
     
Adjustments to intangibles   10,600,000us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles
/ us-gaap_BusinessAcquisitionAxis
= chrw_PhoenixMember
         
Phoenix | Accounts Receivable              
Business Acquisition [Line Items]              
Adjustments to financial assets   1,500,000us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentFinancialAssets
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_BusinessAcquisitionAxis
= chrw_PhoenixMember
         
Phoenix | Goodwill              
Business Acquisition [Line Items]              
Adjustments to financial assets   5,300,000us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentFinancialAssets
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_GoodwillMember
/ us-gaap_BusinessAcquisitionAxis
= chrw_PhoenixMember
         
Phoenix | Current Deferred Taxes              
Business Acquisition [Line Items]              
Adjustments to financial assets   1,700,000us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentFinancialAssets
/ us-gaap_BalanceSheetLocationAxis
= chrw_CurrentDeferredTaxesMember
/ us-gaap_BusinessAcquisitionAxis
= chrw_PhoenixMember
         
Phoenix | Non-Current Deferred Taxes              
Business Acquisition [Line Items]              
Adjustments to financial assets   2,100,000us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentFinancialAssets
/ us-gaap_BalanceSheetLocationAxis
= chrw_NonCurrentDeferredTaxesMember
/ us-gaap_BusinessAcquisitionAxis
= chrw_PhoenixMember
         
Phoenix | Taxes Payable              
Business Acquisition [Line Items]              
Adjustments to financial liabilities   3,000,000us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentFinancialLiabilities
/ us-gaap_BalanceSheetLocationAxis
= chrw_TaxesPayableMember
/ us-gaap_BusinessAcquisitionAxis
= chrw_PhoenixMember
         
T-Chek              
Business Acquisition [Line Items]              
Long lived assets held-for-sale, proceeds from sale         302,500,000us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= chrw_TChekMember
   
Gain on sale           281,600,000us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
/ us-gaap_BusinessAcquisitionAxis
= chrw_TChekMember
 
Apreo              
Business Acquisition [Line Items]              
Purchase consideration             26,500,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= chrw_ApreoMember
Goodwill and other intangible assets related to acquisition             $ 17,400,000chrw_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsAndGoodwill
/ us-gaap_BusinessAcquisitionAxis
= chrw_ApreoMember