CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
OPERATING ACTIVITIES
Net income	$ 449,711us-gaap_NetIncomeLoss	$ 415,904us-gaap_NetIncomeLoss	$ 593,804us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	57,009us-gaap_DepreciationAndAmortization	56,882us-gaap_DepreciationAndAmortization	38,090us-gaap_DepreciationAndAmortization
Provision for doubtful accounts	15,092us-gaap_ProvisionForDoubtfulAccounts	15,587us-gaap_ProvisionForDoubtfulAccounts	10,459us-gaap_ProvisionForDoubtfulAccounts
Stock-based compensation	47,861us-gaap_ShareBasedCompensation	9,094us-gaap_ShareBasedCompensation	59,381us-gaap_ShareBasedCompensation
Gain on divestiture	(1,848)	0	(281,551)
Deferred income taxes	(3,117)us-gaap_DeferredIncomeTaxExpenseBenefit	25,226us-gaap_DeferredIncomeTaxExpenseBenefit	(14,442)us-gaap_DeferredIncomeTaxExpenseBenefit
Loss on sale/disposal of assets	710us-gaap_GainLossOnSaleOfOtherAssets	314us-gaap_GainLossOnSaleOfOtherAssets	3,208us-gaap_GainLossOnSaleOfOtherAssets
Other long-term liabilities	0us-gaap_OtherNoncashIncomeExpense	5us-gaap_OtherNoncashIncomeExpense	513us-gaap_OtherNoncashIncomeExpense
Changes in operating elements, net of effects of acquisitions:
Receivables	(137,102)us-gaap_IncreaseDecreaseInReceivables	(87,316)us-gaap_IncreaseDecreaseInReceivables	(88,107)us-gaap_IncreaseDecreaseInReceivables
Prepaid expenses and other	6,294	(5,254)	5,260
Other non-current assets	380	0	0
Accounts payable and outstanding checks	40,251	47,488	61,732
Accrued compensation and profit-sharing contribution	40,236	(15,097)	(19,064)
Accrued income taxes	(4,370)	(105,857)	104,542
Other accrued liabilities	2,319	(9,199)	(13,483)
Net cash provided by operating activities	513,426	347,777	460,342
INVESTING ACTIVITIES
Purchases of property and equipment	(22,364)	(40,354)	(36,096)
Purchases and development of software	(7,138)us-gaap_PaymentsForSoftware	(7,852)us-gaap_PaymentsForSoftware	(14,560)us-gaap_PaymentsForSoftware
Cash received for divestiture, net of cash sold	0	0	274,802
Acquisitions, net of cash acquired	0	19,126	(583,631)
Restricted cash	359,388	0	0
Other	(6)	221	419
Net cash used for investing activities	(388,896)	(28,859)	(359,066)
FINANCING ACTIVITIES
Proceeds from stock issued for employee benefit plans	11,942us-gaap_ProceedsFromStockPlans	15,166us-gaap_ProceedsFromStockPlans	18,868us-gaap_ProceedsFromStockPlans
Stock tendered for payment of withholding taxes	(12,604)	(50,144)	(10,782)
Payment of contingent purchase price	0chrw_PaymentsOfContingentConsideration	(927)chrw_PaymentsOfContingentConsideration	(12,661)chrw_PaymentsOfContingentConsideration
Repurchase of common stock	(164,041)	(757,305)	(245,067)
Cash dividends	(215,008)us-gaap_PaymentsOfDividends	(220,257)us-gaap_PaymentsOfDividends	(275,353)us-gaap_PaymentsOfDividends
Excess tax benefit on stock-based compensation	7,558	27,209	12,294
Proceeds from short-term borrowings	4,823,000us-gaap_ProceedsFromShortTermDebt	4,165,023us-gaap_ProceedsFromShortTermDebt	324,051us-gaap_ProceedsFromShortTermDebt
Payments on short-term borrowings	(4,593,000)us-gaap_RepaymentsOfShortTermDebt	(4,043,669)us-gaap_RepaymentsOfShortTermDebt	(75,688)us-gaap_RepaymentsOfShortTermDebt
Debt issuance costs	(1,484)us-gaap_PaymentsOfDebtIssuanceCosts	0us-gaap_PaymentsOfDebtIssuanceCosts	0us-gaap_PaymentsOfDebtIssuanceCosts
Proceeds from long-term borrowings	0	500,000	0
Net cash used for financing activities	(143,637)	(364,904)	(264,338)
Effect of exchange rates on cash	(14,000)	(1,986)	(588)
Net change in cash and cash equivalents	(33,107)	(47,972)	(163,650)
Cash and cash equivalents, beginning of year	162,047	210,019	373,669
Cash and cash equivalents, end of year	128,940	162,047	210,019
Stock issued for acquisition	0us-gaap_StockIssued1	0us-gaap_StockIssued1	60,152us-gaap_StockIssued1
Cash paid for income taxes	271,979us-gaap_IncomeTaxesPaid	313,799us-gaap_IncomeTaxesPaid	257,580us-gaap_IncomeTaxesPaid
Cash paid for interest	$ 27,066us-gaap_InterestPaid	$ 3,875us-gaap_InterestPaid	$ 518us-gaap_InterestPaid

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