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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-42

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 825
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-Section 50
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-Subparagraph (a)
-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 825
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-Section 50
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 275
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 275
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-Section 50
-Paragraph 20
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482861/275-10-50-20

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Represents amount of cash balances on deposit for FDIC insured.

No definition available.

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Represents cash deposit with foreign banks.

No definition available.

Name:	vrsk_CashDepositWithForeignBanks
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Data Type:	xbrli:monetaryItemType
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The number of banks the company has cash balances on deposit that exceeds the balance insured by the FDIC limit

No definition available.

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Data Type:	xbrli:integerItemType
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The number of customers that represents the majority of business done with the company.

No definition available.

Name:	vrsk_NumberOfCustomers
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Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
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Name:	srt_MajorCustomersAxis=vrsk_TopFiftyCustomersMember
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Name:	srt_MajorCustomersAxis=vrsk_IndividualCustomerMember
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