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CAPITAL STOCK AND STOCK AWARD PLANS - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Vote
Dec. 31, 2013
Dec. 31, 2012
Compensation Related Costs Share Based Payments Disclosure [Line Items]      
Preferred stock, shares authorized 20,000,000us-gaap_PreferredStockSharesAuthorized 20,000,000us-gaap_PreferredStockSharesAuthorized  
Preferred stock, par value $ 0.10us-gaap_PreferredStockParOrStatedValuePerShare $ 0.10us-gaap_PreferredStockParOrStatedValuePerShare  
Common stock, shares authorized 480,000,000us-gaap_CommonStockSharesAuthorized 480,000,000us-gaap_CommonStockSharesAuthorized  
Common stock, par value $ 0.10us-gaap_CommonStockParOrStatedValuePerShare $ 0.10us-gaap_CommonStockParOrStatedValuePerShare  
Entitled vote for each share of Common Stock 1chrw_CommonStockVotingRight    
Antidilutive securities excluded from computation of earnings per share, amount   218,932us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 127,323us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Maximum employee contribution to purchase company stock $ 10,000chrw_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumContributionPerEmployee    
Discount rate used to determine the purchase price 15.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate    
Stock award, vesting rights These options are subject to certain vesting requirements over a five-year period, based on the company’s earnings growth.    
2009 Program      
Compensation Related Costs Share Based Payments Disclosure [Line Items]      
Repurchase program, number of additional shares authorized for repurchase 10,000,000chrw_AdditionalSharesAuthorizedForRepurchase
/ us-gaap_ShareRepurchaseProgramAxis
= chrw_ShareRepurchaseAuthorization2009Member
   
Shares remaining for repurchase under authorization 0us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
/ us-gaap_ShareRepurchaseProgramAxis
= chrw_ShareRepurchaseAuthorization2009Member
   
2012 Program      
Compensation Related Costs Share Based Payments Disclosure [Line Items]      
Repurchase program, number of additional shares authorized for repurchase 10,000,000chrw_AdditionalSharesAuthorizedForRepurchase
/ us-gaap_ShareRepurchaseProgramAxis
= chrw_ShareRepurchaseAuthorization2012Member
   
Shares remaining for repurchase under authorization 0us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
/ us-gaap_ShareRepurchaseProgramAxis
= chrw_ShareRepurchaseAuthorization2012Member
   
2013 Program      
Compensation Related Costs Share Based Payments Disclosure [Line Items]      
Number of shares authorized to be repurchased   15,000,000us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
/ us-gaap_ShareRepurchaseProgramAxis
= chrw_ShareRepurchaseAuthorization2013Member
 
Shares remaining for repurchase under authorization 10,306,342us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
/ us-gaap_ShareRepurchaseProgramAxis
= chrw_ShareRepurchaseAuthorization2013Member
   
Stock Option      
Compensation Related Costs Share Based Payments Disclosure [Line Items]      
Maximum shares that can be granted under stock plan 3,400,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
   
Shares available for stock awards 3,048,819us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
   
Stock award, vesting period 5 years    
Unrecognized compensation expense 51,000,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
   
Full Value Awards      
Compensation Related Costs Share Based Payments Disclosure [Line Items]      
Stock award, vesting period 5 years    
Unrecognized compensation expense $ 134,200,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= chrw_FullValueAwardsMember
   
Restricted stock awards, discount for post-vesting holding restriction, lower limit 17.00%chrw_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsDiscountForPostvestingRestrictionsRangeLowerLimit
/ us-gaap_AwardTypeAxis
= chrw_FullValueAwardsMember
   
Restricted stock awards, discount for post-vesting holding restriction, upper limit 22.00%chrw_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsDiscountForPostvestingRestrictionsRangeUpperLimit
/ us-gaap_AwardTypeAxis
= chrw_FullValueAwardsMember