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CAPITAL STOCK AND STOCK AWARD PLANS Summary of Nonvested Performance-Based Restricted Stock Grants (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Nonvested Restricted Shares and Units - Number of Shares and Units [Roll Forward]  
Unvested, Ending Balance 1,536,154us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Nonvested Restricted Shares and Units - Weighted Average Grant Date Fair Value [Roll Forward]  
Unvested, Ending Balance $ 55.54us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue [1]
Performance Based Restricted Stock and Restricted Stock Units  
Nonvested Restricted Shares and Units - Number of Shares and Units [Roll Forward]  
Unvested, Beginning Balance 2,028,669us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= chrw_PerformanceBasedRestrictedStockAndRestrictedStockUnitsMember
Granted 321,995us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= chrw_PerformanceBasedRestrictedStockAndRestrictedStockUnitsMember
Vested (516,165)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= chrw_PerformanceBasedRestrictedStockAndRestrictedStockUnitsMember
Forfeitures (298,345)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_AwardTypeAxis
= chrw_PerformanceBasedRestrictedStockAndRestrictedStockUnitsMember
Unvested, Ending Balance 1,536,154us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= chrw_PerformanceBasedRestrictedStockAndRestrictedStockUnitsMember
Nonvested Restricted Shares and Units - Weighted Average Grant Date Fair Value [Roll Forward]  
Unvested, Beginning Balance $ 51.55us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= chrw_PerformanceBasedRestrictedStockAndRestrictedStockUnitsMember
Granted $ 60.70us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= chrw_PerformanceBasedRestrictedStockAndRestrictedStockUnitsMember
Vested $ 51.26us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= chrw_PerformanceBasedRestrictedStockAndRestrictedStockUnitsMember
Forfeitures $ 45.88us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= chrw_PerformanceBasedRestrictedStockAndRestrictedStockUnitsMember
Unvested, Ending Balance $ 54.67us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= chrw_PerformanceBasedRestrictedStockAndRestrictedStockUnitsMember
[1] Amount shown is the weighted average grant date fair value of performance shares and restricted stock units granted, net of forfeitures.