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Note 8 - Leases (Details Textual) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Finance Lease, Liability, Total | $ 13.3 |
Fixed Assets, Net [Member] |  |
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total | 19.0 | $ 27.1
Short-term Debt and Current Portion of Long-term Debt and Long-term Debt [Member] |  |
Finance Lease, Liability, Total | $ 13.5 | $ 24.7
First Option to Extend Corporate Headquarters [Member] |  |
Lessee, Leases, Number of Extensions | 1 |
Lessee, Lease, Extension Lease Term (Year) | 10 years |
Second Option to Extend Corporate Headquarters [Member] |  |
Lessee, Leases, Number of Extensions | 2 |
Lessee, Lease, Extension Lease Term (Year) | 5 years |
Hyderabad, India Office [Member] |  |
Lessee, Leases, Termination Period (Month) | 6 months |

X
- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The extension lease term of operating and financing leases of the lessee. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

X
- Definition The number of extensions under the operating and finance leases of the lessee. + References No definition available. + Details
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Namespace Prefix: | vrsk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The termination period for operating and finance leases of the lessee. + References No definition available. + Details
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- Details
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X
- Details
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X
- Details
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Namespace Prefix: |
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X
- Details
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Namespace Prefix: |
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Balance Type: |
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X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |