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CAPITAL STOCK AND STOCK AWARD PLANS Summary of Performance Based Shares and Units by Year of Grant (Detail) (USD $)
 12 Months Ended
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Performance shares and stock units granted, net of forfeitures 2,334,949us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
Weighted average grant date fair value (1) $ 55.54us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue [1]
Unvested performance shares and restricted stock units 1,536,154us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
2010  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Performance shares and stock units granted, net of forfeitures 686,919us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_AwardDateAxis
= chrw_Range2Member
Weighted average grant date fair value (1) $ 63.28us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardDateAxis
= chrw_Range2Member		 [1]
Unvested performance shares and restricted stock units 288,506us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardDateAxis
= chrw_Range2Member
2011  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Performance shares and stock units granted, net of forfeitures 596,676us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_AwardDateAxis
= chrw_Range3Member
Weighted average grant date fair value (1) $ 53.72us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardDateAxis
= chrw_Range3Member		 [1]
Unvested performance shares and restricted stock units 352,037us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardDateAxis
= chrw_Range3Member
2012  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Performance shares and stock units granted, net of forfeitures 333,881us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_AwardDateAxis
= chrw_Range4Member
Weighted average grant date fair value (1) $ 48.65us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardDateAxis
= chrw_Range4Member		 [1]
Unvested performance shares and restricted stock units 277,121us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardDateAxis
= chrw_Range4Member
2013  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Performance shares and stock units granted, net of forfeitures 396,735us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_AwardDateAxis
= chrw_Range5Member
Weighted average grant date fair value (1) $ 46.45us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardDateAxis
= chrw_Range5Member		 [1]
Unvested performance shares and restricted stock units 297,552us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardDateAxis
= chrw_Range5Member
2014  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Performance shares and stock units granted, net of forfeitures 320,738us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_AwardDateAxis
= chrw_Range6Member
Weighted average grant date fair value (1) $ 60.74us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardDateAxis
= chrw_Range6Member		 [1]
Unvested performance shares and restricted stock units 320,938us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardDateAxis
= chrw_Range6Member
[1] Amount shown is the weighted average grant date fair value of performance shares and restricted stock units granted, net of forfeitures.