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Note 17 - Compensation Plans (Details Textual)		12 Months Ended			22 Months Ended
	Jan. 01, 2019	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares
Share-Based Payment Arrangement, Expense		$ 54,000,000	$ 56,500,000	$ 55,700,000
Number of Service Hours		1,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)			4 years
Profit Sharing Contributions		$ 0	$ 0	0
Proceeds from Stock Options Exercised		141,900,000	132,500,000	84,300,000
Share-Based Payment Arrangement, Expense, Tax Benefit		$ 20,600,000	$ 26,500,000	$ 35,900,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year)		5 years 7 months 6 days	5 years 10 months 24 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term (Year)		4 years 9 months 18 days	4 years 10 months 24 days
Unrecognized Compensation Cost Related to Nonvested Share Based Compensation Arrangements		$ 76,200,000			$ 76,200,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		2 years 2 months 4 days
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date		5.00%			5.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | shares		211,945	653,802	750,822
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate		20.00%			20.00%
Share Based Compensation Arrangement By Share Based Payment Award, Percentage Of Short Term Incentive Compensation Available For Payroll Deductions Maximum		50.00%
Share Based Compensation Arrangement By Share Based Payment Award, Payroll Deductions Amount Maximum		$ 25,000			$ 25,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares		$ 52.69	$ 42.25	$ 35.15
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Target Levels		0.00%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Target Levels		200.00%
The 2021 Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares) | shares		13,441,921			13,441,921
Proceeds from Stock Options Exercised		$ 141,900,000	$ 132,500,000
KSOP [Member]
Maximum Pre Tax Employee Contribution To Saving Plan		22,500	20,500	$ 19,500	$ 22,500
Share-based Compensation Arrangement by Share-based Payment Award, Additional Employee Contribution, Minimum Participant Age (Year)				50 years
Additional Pre Tax Certain Eligible Employee Contribution To Saving Plan		7,500	$ 6,500		$ 7,500
Maximum Employee Contribution As Percentage Of Compensation	6.00%		10.00%
Percentage Of Employer Contribution	100.00%
Share-Based Payment Arrangement, Expense		$ 32,400,000	$ 40,000,000	$ 33,700,000
Number of Service Hours		1,000
Employee Stock Purchase Plan [Member] | UK Sharesave Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)		3 years
Common Stock, Capital Shares Reserved for Future Issuance (in shares) | shares		441,528			441,528
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date		5.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares) | shares		5,144		11,254
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | shares			9,370
Value of Common Stock Issued to Employees Per Share (in dollars per share) | $ / shares		$ 227.65	$ 178.26	$ 166.16	$ 227.65
Employee Stock Purchase Plan [Member] | US ESPP [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares) | shares		1,177,258			1,177,258
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares) | shares		18,636	30,398	33,974
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares		$ 209.68	$ 174.66	$ 181.77

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1

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-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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X

- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
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-Section 50
-Paragraph 2
-Subparagraph (i)
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-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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X

- Definition

Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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X

- Definition

Amount of cash inflow from exercise of option under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 718
-SubTopic 10
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-Section 50
-Paragraph 2
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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

X

- Definition

Discount rate from fair value on purchase date that participants pay for shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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Data Type:	dtr-types:percentItemType
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X

- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
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-Section 50
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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Gross number of share options (or share units) granted during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(01)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
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-Section 50
-Paragraph 2
-Subparagraph (d)(1)
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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of shares issued under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
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X

- Definition

Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Publisher FASB
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X

- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
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X

- Definition

Represents additional pre tax certain eligible employee contribution to saving plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	vrsk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

This element represents the maximum percentage of compensation eligible participants could make to a 401(k) plan account during the reporting period.

+ References

No definition available.

+ Details

Name:	vrsk_MaximumEmployeeContributionAsPercentageOfCompensation
Namespace Prefix:	vrsk_
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X

- Definition

This element represents the maximum pre-tax contribution that can be made to an 401(k) plan account as determined under the provisions of Code Section 401(g) during the reporting period.

+ References

No definition available.

+ Details

Name:	vrsk_MaximumPreTaxEmployeeContributionToSavingPlan
Namespace Prefix:	vrsk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

This element represents the number of service hours required from employees in a plan year to be qualified for certain employee benefits.

+ References

No definition available.

+ Details

Name:	vrsk_NumberOfServiceHours
Namespace Prefix:	vrsk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

This element represents the percentage at which an employer is to make the 401(k) match.

+ References

No definition available.

+ Details

Name:	vrsk_PercentageOfEmployerContribution
Namespace Prefix:	vrsk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

This element represents the amount contributed by an entity to one of its employee benefit plans. The profit sharing plan is discretionary dependent upon the performance of the entity.

+ References

No definition available.

+ Details

Name:	vrsk_ProfitSharingContributions
Namespace Prefix:	vrsk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

This element represents the maximum amount of payroll deduction from an employee's salary which could be authorized under an entity's employee stock purchase plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	vrsk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

This element represents the maximum percentage of payroll deduction from short-term incentive compensation which could be authorized under an entity's employee stock purchase plan.

+ References

No definition available.

+ Details

Name:	vrsk_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfShortTermIncentiveCompensationAvailableForPayrollDeductionsMaximum
Namespace Prefix:	vrsk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents minimum participant age of share-based compensation arrangement by share-based payment award.

+ References

No definition available.

+ Details

Name:	vrsk_SharebasedCompensationArrangementBySharebasedPaymentAwardAdditionalEmployeeContributionMinimumParticipantAge
Namespace Prefix:	vrsk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percent target levels for an award in a share-baesd compensation arrangement.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
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X

- Definition

As of the balance-sheet date, the aggregate unrecognized cost of share-based awards made to employees and non-employees under share-based compensation plans that have yet to vest.

+ References

No definition available.

+ Details

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Namespace Prefix:	vrsk_
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Balance Type:	debit
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X

- Definition

This element represents the discount price per share offered to employees who participate in the ESPP Plan.

+ References

No definition available.

+ Details

Name:	vrsk_ValueOfCommonStockIssuedToEmployeesPerShare
Namespace Prefix:	vrsk_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
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X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PlanNameAxis=vrsk_The2021IncentivePlanMember
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=vrsk_KSOPMember
Namespace Prefix:
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Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=vrsk_EmployeeStockPurchasePlanMember
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Period Type:

X

- Details

Name:	us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis=vrsk_UKSharesavePlanMember
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X

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