Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionAxis=chrw_DemaServiceS.pAMember
Namespace Prefix:
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- Details

Name:	us-gaap_BusinessAcquisitionAxis=chrw_TheSpaceCargoGroupMember
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Balance Type:
Period Type:

ACQUISITIONS - Narrative (Details) - USD ($) $ in Thousands			9 Months Ended
ACQUISITIONS - Narrative (Details) - USD ($) $ in Thousands	May 22, 2019	Feb. 28, 2019	Sep. 30, 2019	Sep. 30, 2018
Business Acquisition [Line Items]
Total purchase consideration net of cash acquired			$ 59,188	$ 1,315
Goodwill recorded in acquisition			$ 33,663
Dema Service
Business Acquisition [Line Items]
Total purchase consideration net of cash acquired	$ 14,200
Goodwill recorded in acquisition	$ 7,800
Space Cargo
Business Acquisition [Line Items]
Total purchase consideration net of cash acquired		$ 45,000
Goodwill recorded in acquisition		$ 25,900