Verisk Analytics (VRSK) 10-K21 Feb 242023 FY Annual reportFinancial data

Company Profile

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
Document And Entity Information - USD ($)	Dec. 31, 2023	Feb. 16, 2024	Jun. 30, 2023
Document Information [Line Items]
Entity Central Index Key	0001442145
Entity Registrant Name	Verisk Analytics, Inc.
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2023
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
Entity File Number	001-34480
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-2994223
Entity Address, Address Line One	545 Washington Boulevard
Entity Address, City or Town	Jersey City
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07310-1686
City Area Code	201
Local Phone Number	469-3000
Title of 12(b) Security	Common Stock $.001 par value
Trading Symbol	VRSK
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 31,913,567,495
Entity Common Stock, Shares Outstanding		143,389,884
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Morristown, New Jersey

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 302.7	$ 112.5
Accounts receivable, net	334.2	290.1
Prepaid expenses	84.5	83.7
Income taxes receivable	23.5	44.2
Other current assets	65.2	32
Current assets held-for-sale	0	362.6
Total current assets	810.1	925.1
Noncurrent assets:
Fixed assets, net	604.9	541.5
Operating lease right-of-use assets, net	191.7	182
Intangible assets, net	471.7	504.8
Goodwill	1,760.8	1,676
Deferred income tax assets	30.8	31.7
Other noncurrent assets	496.1	371.4
Noncurrent assets held for sale	0	2,728.6
Total assets	4,366.1	6,961.1
Current liabilities:
Accounts payable and accrued liabilities	340.8	292.8
Short-term debt and current portion of long-term debt	14.5	1,392.9
Deferred revenues	375.1	321.7
Operating lease liabilities	33.1	29.5
Income taxes payable	7.9	0
Current liabilities held-for-sale	0	282.3
Total current liabilities	771.4	2,319.2
Noncurrent liabilities:
Long-term debt	2,852.2	2,343.2
Deferred income tax liabilities	210.1	145.6
Operating lease liabilities	195.6	189.9
Other noncurrent liabilities	14.6	17.9
Noncurrent liabilities held-for-sale	0	177.6
Total liabilities	4,043.9	5,193.4
Commitments and contingencies (Note 21)
Stockholders’ equity:
Common stock, $.001 par value; 2,000,000,000 shares authorized; 544,003,038 shares issued; 143,308,729 and 154,701,136 shares outstanding, respectively	0.1	0.1
Additional paid-in capital	2,872.3	2,720.8
Treasury stock, at cost, 400,694,309 and 389,301,902 shares, respectively	(9,037.5)	(6,239.5)
Retained earnings	6,416.9	5,999.1
Accumulated other comprehensive income (losses)	58.2	(731.2)
Total Verisk stockholders' equity	310	1,749.3
Noncontrolling interests	12.2	18.4
Total stockholders’ equity	322.2	1,767.7
Total liabilities and stockholders’ equity	$ 4,366.1	$ 6,961.1

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2023	Dec. 31, 2022
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock authorized (in shares)	2,000,000,000	2,000,000,000
Common stock issued (in shares)	544,003,038	544,003,038
Common stock outstanding (in shares)	143,308,729	154,701,136
Treasury stock (in shares)	400,694,309	389,301,902

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues	$ 2,681.4	$ 2,497	$ 2,462.5
Operating expenses:
Cost of revenues (exclusive of items shown separately below)	876.5	824.6	853.7
Selling, general and administrative	391.8	381.5	313.2
Depreciation and amortization of fixed assets	206.8	164.2	170.3
Amortization of intangible assets	74.6	74.4	79.9
Other operating (income) loss	0	(354.2)	134
Total operating expenses	1,549.7	1,090.5	1,551.1
Operating income	1,131.7	1,406.5	911.4
Other income (expense):
Investment income (loss) and others, net	11	(5.3)	2.1
Interest expense, net	(115.5)	(138.8)	(127)
Total other expense, net	(104.5)	(144.1)	(124.9)
Total income before income taxes	1,027.2	1,262.4	786.5
Provision for income taxes	(258.8)	(220.3)	(179.4)
Income from continuing operations	768.4	1,042.1	607.1
(Loss) income from discontinued operations, net of tax (expense) benefit of $(12.6), $131.5 and $(29.7), respectively (Note 11)	(154)	(87.8)	59.2
Net income	614.4	954.3	666.3
Less: Net loss (income) attributable to noncontrolling interests	0.2	(0.4)	(0.1)
Net income attributable to Verisk	$ 614.6	$ 953.9	$ 666.2
Income from continuing operations (in dollars per share)	$ 5.24	$ 6.6	$ 3.75
Loss from discontinued operations (in dollars per share)	(1.05)	(0.56)	0.37
Basic net income per share attributable to Verisk: (in dollars per share)	4.19	6.04	4.12
Income from continuing operations (in dollars per share)	5.22	6.55	3.72
Loss from discontinued operations (in dollars per share)	(1.05)	(0.55)	0.36
Diluted net income per share attributable to Verisk: (in dollars per share)	$ 4.17	$ 6	$ 4.08
Weighted average shares outstanding:
Basic (in shares)	146,623,989	157,905,718	161,841,441
Diluted (in shares)	147,336,159	158,928,942	163,338,909

Consolidated Statements of Op_2

Consolidated Statements of Operations (Parentheticals) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
(Loss) Income from discontinued operations, tax	$ (12.6)	$ 131.5	$ (29.7)

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net income	$ (614.4)	$ (954.3)	$ (666.3)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	768.2	(300.3)	(46.3)
Pension and postretirement liability adjustment	21.8	(37.7)	26.9
Total other comprehensive income (loss)	790	(338)	(19.4)
Comprehensive income	1,404.4	616.3	646.9
Less: Comprehensive (gain) loss attributable to noncontrolling interests	(0.4)	1.1	0.4
Comprehensive income attributable to Verisk	$ 1,404	$ 617.4	$ 647.3

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Millions		Share-Based Payment Arrangement, Option [Member] Common Stock [Member]	Share-Based Payment Arrangement, Option [Member] Additional Paid-in Capital [Member]	Share-Based Payment Arrangement, Option [Member] Treasury Stock, Common [Member]	Share-Based Payment Arrangement, Option [Member] Retained Earnings [Member]	Share-Based Payment Arrangement, Option [Member] AOCI Attributable to Parent [Member]	Share-Based Payment Arrangement, Option [Member] Parent [Member]	Share-Based Payment Arrangement, Option [Member] Noncontrolling Interest [Member]	Share-Based Payment Arrangement, Option [Member]	Performance Shares [Member] Common Stock [Member]	Performance Shares [Member] Additional Paid-in Capital [Member]	Performance Shares [Member] Treasury Stock, Common [Member]	Performance Shares [Member] Retained Earnings [Member]	Performance Shares [Member] AOCI Attributable to Parent [Member]	Performance Shares [Member] Parent [Member]	Performance Shares [Member] Noncontrolling Interest [Member]	Performance Shares [Member]	Restricted Stock [Member] Common Stock [Member]	Restricted Stock [Member] Additional Paid-in Capital [Member]	Restricted Stock [Member] Treasury Stock, Common [Member]	Restricted Stock [Member] Retained Earnings [Member]	Restricted Stock [Member] AOCI Attributable to Parent [Member]	Restricted Stock [Member] Parent [Member]	Restricted Stock [Member] Noncontrolling Interest [Member]	Restricted Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2020																										544,003,038
Balance at Dec. 31, 2020																										$ 0.1	$ 2,490.9	$ (4,179.3)	$ 4,762.2	$ (375.7)	$ 2,698.2	$ 0	$ 2,698.2
Net income																										0	0	0	666.2	0	666.2	0.1	666.3
Other comprehensive income																										0	0	0	0	(18.9)	(18.9)	(0.5)	(19.4)
Investment in noncontrolling interests																										0	0	0	0	0	0	26.4	26.4
Common stock dividend (1)	[1]																									0	0	0	(188)	0	(188)	0	(188)
Treasury stock acquired																										0	0	(475)	0	0	(475)	0	(475)
Stock options exercised		$ 0	$ 70.4	$ 13.6	$ 0	$ 0	$ 84	$ 0	$ 84
PSUs lapsed										$ 0	$ (0.6)	$ 0.6	$ 0	$ 0	$ 0	$ 0	$ 0
RSAs lapsed																		$ 0	$ (1.5)	$ 1.5	$ 0	$ 0	$ 0	$ 0	$ 0
Stock-based compensation																										0	55.7	0	0	0	55.7	0	55.7
Net share settlement from PSUs and RSAs																										0	(11.8)	0	0	0	(11.8)	0	(11.8)
Other stock issuances																										0	5.6	0.5	0	0	6.1	0	6.1
Investment in noncontrolling interests																										$ 0	0	0	0	0	0	(26.4)	(26.4)
Stock options exercised		$ 0	$ (70.4)	$ (13.6)	$ 0	$ 0	$ (84)	$ 0	$ (84)
Balance (in shares) at Dec. 31, 2021																										544,003,038
Balance at Dec. 31, 2021																										$ 0.1	2,608.7	(4,638.1)	5,240.4	(394.6)	2,816.5	26	2,842.5
Net income																										0	0	0	953.9	0	953.9	0.4	954.3
Other comprehensive income																										0	0	0	0	(335.5)	(335.5)	(1.4)	(336.9)
Common stock dividend (1)	[1]																									0	0	0	(195.2)	0	(195.2)	0	(195.2)
Treasury stock acquired																										0	0	(1,662.5)	0	0	(1,662.5)	0	(1,662.5)
Stock options exercised																										0	111.9	20.6	0	0	132.5	0	132.5
PSUs lapsed										0	(0.6)	0.6	0	0	0	0	0									0
RSAs lapsed																		0	(1.7)	1.7	0	0	0	0	0
Stock-based compensation																										0	56.5	0	0	0	56.5	0	56.5
Net share settlement from PSUs and RSAs																										0	(20.7)	0	0	0	(20.7)	0	(20.7)
Other stock issuances																										0	4.7	0.7	0	0	5.4	0	5.4
Investment in noncontrolling interests																										0	(0.5)	0	0	(1.1)	(1.6)	(6.6)	(8.2)
Treasury stock share repurchased not yet settled																											(37.5)	37.5	0	0	0		0
Stock options exercised																										$ 0	(111.9)	(20.6)	0	0	(132.5)	0	(132.5)
Balance (in shares) at Dec. 31, 2022																										544,003,038
Balance at Dec. 31, 2022																										$ 0.1	2,720.8	(6,239.5)	5,999.1	(731.2)	1,749.3	18.4	1,767.7
Net income																										0	0	0	614.6	0	614.6	(0.2)	614.4
Other comprehensive income																										0	0	0	0	790	790	0.6	790.6
Investment in noncontrolling interests																										0	3.9	0	0	0.6	4.5	6.6	11.1
Common stock dividend (1)																										0	0	0	(196.8)	0	(196.8)	0	(196.8)
Stock options exercised																										0	115.5	25.6	0	0	141.1	0	141.1
PSUs lapsed										$ 0	$ (0.4)	$ 0.4	$ 0	$ 0	$ 0	$ 0	$ 0
RSAs lapsed																		$ 0	$ (1.7)	$ 1.7	$ 0	$ 0	$ 0	$ 0	$ 0
Stock-based compensation																										0	54	0	0	0	54	0	54
Net share settlement from PSUs and RSAs																										0	(15.3)	0	0	0	(15.3)	0	(15.3)
Other stock issuances																										0	3.3	0.7	0	0	4	0	4
Treasury stock share repurchased not yet settled																											(37.5)	37.5	0	0	0		0
Investment in noncontrolling interests																										0	(3.9)	0	0	(0.6)	(4.5)	(6.6)	(11.1)
Treasury stock acquired																										0	37.5	(2,838.7)	0	0	(2,801.2)	0	(2,801.2)
Excise tax associated with share repurchases																										0	0	(25.2)	0	0	(25.2)	0	(25.2)
Stock options exercised																										$ 0	(115.5)	(25.6)	0	0	(141.1)	0	(141.1)
Balance (in shares) at Dec. 31, 2023																										544,003,038
Balance at Dec. 31, 2023																										$ 0.1	$ 2,872.3	$ (9,037.5)	$ 6,416.9	$ 58.2	$ 310	$ 12.2	$ 322.2

[1]Refer to Note 11. Stockholders' Equity for discussion related to quarterly cash dividends declared per share

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement, Option [Member]
Shares transferred from treasury stock (in shares)	1,295,815	1,435,076	1,146,368
Performance Shares [Member]
Shares transferred from treasury stock (in shares)	27,771	49,803	50,898
Restricted Stock [Member]
Shares transferred from treasury stock (in shares)	106,613	122,340	135,664
Treasury stock acquired, shares (in shares)	12,849,921	8,600,963	2,545,191
Net share settlement (in shares)	81,536	99,977	60,101
Other stock issuances (in shares)	27,315	43,241	45,374

Condensed Consolidated Statemen

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 614.4	$ 954.3	$ 666.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of fixed assets	206.8	197.1	206.9
Amortization of intangible assets	74.6	142.9	176.7
Amortization of debt issuance costs and original issue discount, net of original issue premium	1.5	1.1	1.4
Provision for doubtful accounts	8.7	7	17.7
Loss (gain) on sale of assets, net	131.1	(393.9)	0
Impairment of cost-based investments	6.5	0	0
Stock-based compensation expense	54	56.5	55.7
Impairment of long-lived assets	0	377.4	134
Deferred income taxes	52.7	(261)	49.8
Loss on disposal of fixed assets, net	3.8	1.1	0.4
Acquisition related liability adjustment	(20)	0	0
Changes in assets and liabilities, net of effects from acquisitions:
Accounts receivable	(83)	(57.7)	(29.7)
Prepaid expenses and other assets	(56.9)	(8.4)	(33.6)
Operating lease right-of-use assets, net	26.8	46.6	41.3
Income taxes	(55.8)	25.6	(5.7)
Accounts payable and accrued liabilities	46.5	(21.2)	(80.8)
Deferred revenues	81.2	64.5	32.4
Operating lease liabilities	(27.1)	(43.9)	(41.3)
Other liabilities	(5.1)	(29)	(35.8)
Net cash provided by operating activities	1,060.7	1,059	1,155.7
Cash flows from investing activities:
Acquisitions and purchases of controlling interests, net of cash acquired of $8.0, $17.4, and $9.3, respectively	(83.3)	(448.9)	(289.8)
Proceeds from sale of businesses	3,066.4	1,073.3	0
Investments in nonpublic companies	(2.2)	(46)	(23.6)
Escrow funding associated with acquisitions	(3.8)	(2.3)	(9.2)
Capital expenditures	(230)	(274.7)	(268.4)
Payment of contingent liability related to acquisitions	0	0	(1.2)
Other investing activities, net	(0.6)	0	0.2
Net cash provided by (used in) investing activities	2,746.5	301.4	(592)
Cash flows from financing activities:
(Repayment of) proceeds from short-term debt, net	(1,265)	380	560
Repayments of current portion of long-term debt	0	(350)	(450)
Proceeds from issuance of long-term debt, inclusive of original issue premium and net of original issue discount	495.2	0	0
Proceeds from issuance of short-term debt with original maturities less than three months	0	400	0
Repayment of short-term debt with original maturities greater than three months	(125)	0	0
Payment of debt issuance costs	(6)	0	0
Repurchases of common stock	(2,762.3)	(1,662.5)	(475)
Net share settlement of taxes from restricted stock and performance share awards	(15.3)	(20.7)	(11.8)
Proceeds from stock options exercised	141.9	132.5	84.3
Treasury stock shares repurchased not yet settled	(37.5)	0	0
Dividends paid	(196.8)	(195.2)	(188.2)
Other financing activities, net	(15.7)	(14.3)	(18.2)
Net cash used in financing activities	(3,786.5)	(1,330.2)	(498.9)
Effect of exchange rate changes	(10.7)	(17.8)	(3.3)
Increase in cash and cash equivalents	10	12.4	61.5
Cash and cash equivalents, beginning of period	292.7	280.3	218.8
Cash and cash equivalents, end of period	302.7	292.7	280.3
Supplemental disclosures:
Income taxes paid	276	324.5	175
Interest paid	111.2	134.3	129
Noncash investing and financing activities:
Deferred tax liability established on date of acquisitions	8.7	14	21
Net assets sold as part of the dispositions, net of cash sold	3,211.8	0	0
Finance lease additions, net of disposals	45.6	5.2	7
Operating lease additions, net of terminations	34.3	21.7	22.4
Fixed assets included in accounts payable and accrued liabilities	$ 2.2	$ 0.2	$ 5.3

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Cash Flows (Parentheticals) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net of cash acquired from acquisitions	$ 8	$ 17.4	$ 9.3

Insider Trading Arrangements

Insider Trading Arrangements	12 Months Ended
Insider Trading Arrangements	Dec. 31, 2023 shares
ecd_TradingArrByIndTable
Material Terms of Trading Arrangement [Text Block]	9B. Other Information 10b5 1 During the fiscal quarter ended December 31, 2023, 16 10b5 1 408 ● Lee M. Shavel Chief Executive Officer, President and director December 4, 2023 first March 15, 2024). December 31, 2024 ● Elizabeth D. Mann Chief Financial Officer December 15, 2023 first March 15, 2024). December 31, 2024 ● David J. Grover Controller and Chief Accounting Officer December 14, 2023 first March 15, 2024). April 1, 2024 There were no 10b5 1 408 December 31, 2023 16 10b5 1 16
Rule 10b5-1 Arrangement Adopted [Flag]	true
Non-Rule 10b5-1 Arrangement Adopted [Flag]	false
Rule 10b5-1 Arrangement Terminated [Flag]	false
Non-Rule 10b5-1 Arrangement Terminated [Flag]	false
Lee M. Shavel [Member]
ecd_TradingArrByIndTable
Trading Arrangement, Individual Name	Lee M. Shavel
Trading Arrangement, Individual Title	Chief Executive Officer, President and director
Trading Arrangement Adoption Date	December 4, 2023
Trading Arrangement Termination Date	December 31, 2024
Trading Arrangement, Securities Aggregate Available Amount (in shares)	8,000
Elizabeth M. Mann [Member]
ecd_TradingArrByIndTable
Trading Arrangement, Individual Name	Elizabeth D. Mann
Trading Arrangement, Individual Title	Chief Financial Officer
Trading Arrangement Adoption Date	December 15, 2023
Trading Arrangement Termination Date	December 31, 2024
Trading Arrangement, Securities Aggregate Available Amount (in shares)	2,000
David J. Grover [Member]
ecd_TradingArrByIndTable
Trading Arrangement, Individual Name	David J. Grover
Trading Arrangement, Individual Title	Controller and Chief Accounting Officer
Trading Arrangement Adoption Date	December 14, 2023
Trading Arrangement Termination Date	April 1, 2024
Trading Arrangement, Securities Aggregate Available Amount (in shares)	6,481

Note 1 - Organization

Note 1 - Organization	12 Months Ended
Note 1 - Organization	Dec. 31, 2023
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. Verisk Analytics, Inc. is a strategic data analytics and technology partner to the global insurance industry. We empower clients to strengthen operating efficiency, improve underwriting and claims outcomes, combat fraud and make informed decisions about global risks, including climate change, extreme events, ESG (environmental, social, and governance), and political issues. Through advanced data analytics, software, scientific research, and deep industry knowledge, we help build global resilience for individuals, communities, and businesses. We trade under the ticker symbol "VRSK" on the Nasdaq Global Select Market.

Note 2 - Basis of Presentation

Note 2 - Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Significant Accounting Policies [Text Block]	2. Our accompanying consolidated financial statements have been prepared on the basis of accounting principles generally accepted in the United States of America (“U.S. GAAP”). The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Significant estimates include acquisition purchase price allocations, the fair value of goodwill, the realization of deferred tax assets and liabilities, acquisition-related liabilities, fair value of stock-based compensation for equity awards granted, and assets and liabilities for pension and postretirement benefits. Actual results may On February 1, 2023, 205 20, Discontinued Operations 205 20” 205 20. Significant accounting policies include the following: (a) Intercompany Accounts and Transactions The consolidated financial statements include all of our accounts. All intercompany accounts and transactions have been eliminated. (b) Revenue Recognition The following describes our primary types of revenues and the applicable revenue recognition policies. We recognize revenues through recurring and non-recurring long-term agreements (generally one five Hosted Subscriptions We offer two first not no not 606, Revenue from Contracts with Customers 606" The second may no not 606. Subscriptions are generally paid in advance of rendering services either quarterly or annually upon commencement of the subscription period. Advisory/Consulting Services We provide certain discrete project based advisory/consulting services, which are recognized over time by measuring the progress toward complete satisfaction of the performance obligation, based on the input method of consulting hours worked; this aligns with the results achieved and value transferred to our customer. The hours consumed are most reflective of the measure of progress towards satisfying the performance obligation, as the resources hours worked directly tie to the progress of the services to be provided. In general, they are billed over the course of the project. Transactional Solutions Certain solutions are also paid for by customers on a transactional basis. We recognize these revenues as the solutions are delivered or services performed at a point in time. In general, our customers are billed monthly at the end of each month. (c) Deferred Revenues We invoice our customers in annual, quarterly, monthly, or milestone installments. Amounts billed and/or collected in advance of services being provided are recorded as “Deferred revenues” and “Other noncurrent liabilities” in our accompanying consolidated balance sheets and are recognized as the services are performed, control is transferred to customers, and the applicable revenue recognition criteria is met. (d) Accounts Receivable and Allowance for Doubtful Accounts Accounts receivable are generally recorded at the invoiced amount. Unbilled receivables are short-term in nature and expected to be billed within one (e) Deferred Commissions We recognize an asset for the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one five December 31, 2023 (f) Fixed Assets and Finite-lived Intangible Assets Fixed assets and finite-lived intangibles are stated at cost less accumulated depreciation and amortization, which are computed on a straight-line basis over their estimated useful lives. Leasehold improvements are amortized over the shorter of the useful life of the asset or the lease term. Our internal software development costs primarily relate to internal-use software. Such costs are capitalized in the application development stage in accordance with ASC 350 40, Internal-use Software 350 40" 985 20, Software to be Sold, Leased, or Marketed 985 20” In accordance with ASC 360, Property, Plant & Equipment may not first first 2022, 2021, (g) Leases We have operating and finance leases for corporate offices, data centers, and certain equipment that are accounted for under ASC 842, Leases 2033 We determine if an arrangement is a lease at inception. We consider any contract where there is an identified asset and that it has the right to control the use of such asset in determining whether the contract contains a lease. A right-of-use ("ROU") asset represents our right to use an underlying asset for the lease term and the lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and lease liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. As our operating leases do not zero (h) Fair Value of Financial and Non-financial Instruments We follow the provisions of ASC 820 10, Fair Value Measurements 820 10” 820 10 820 10 (i) Foreign Currency We have determined local currencies are the functional currencies of our foreign operations. The assets and liabilities of foreign subsidiaries are translated at the period-end rate of exchange and statement of operations items are translated at the average rates prevailing during the year. The resulting translation adjustment is recorded as a component of “Accumulated other comprehensive losses” in our accompanying consolidated statements of changes in stockholders’ equity. (j) Stock-Based Compensation We follow ASC 718, Stock Compensation 718” 718, Our nonqualified stock options have an exercise price equal to the closing price of our common stock on the grant date, with a ten no zero The fair value of our restricted stock is determined using the closing price of our common stock on the grant date. Our restricted stock is not four Performance share units (“PSU”) vest at the end of a three one third zero 500 We estimate expected forfeitures of equity awards at the date of grant and recognize compensation expense only for those awards expected to vest. The forfeiture assumption is ultimately adjusted to the actual forfeiture rate. Estimated forfeiture is ultimately adjusted to actual forfeiture. Changes in the forfeiture assumptions may Excess tax benefit from exercised stock options, lapsing of restricted stock and PSUs is recorded as an income tax benefit in our accompanying consolidated statements of operations. This tax benefit is calculated as the excess of the intrinsic value of options exercised and of the market value of restricted stock lapsed over the compensation recognized for financial reporting purposes. (k) Research and Development Costs Research and development costs, which are primarily related to personnel and related overhead costs incurred in developing new services for customers, are expensed as incurred. Such cost s were $36.8 million, $43.1 million, and $47.1 m December 31, 2023, 2022, 2021, (l) Advertising Costs Advertising costs, which are primarily associated with promoting our brand, names and solutions provided, are expensed as incurred. Such costs were $11.9 million, $14.7 million, and $12.0 million for the years ended December 31, 2023, 2022, 2021, (m) Income Taxes We account for income taxes under the asset and liability method under ASC 740, Income Taxes 740” Deferred tax assets are recorded to the extent these assets are more likely than not not not We follow ASC 740 10, Income Taxes 740 10” , 740 10 may not not 740 10. We recognize interest and penalties related to unrecognized tax benefits within the income tax expense line in our accompanying consolidated statements of operations. Accrued interest and penalties are included within “Other liabilities” on our accompanying consolidated balance sheets. (n) Earnings Per Share Basic and diluted earnings per share (“EPS”) are determined in accordance with ASC 260, Earnings per Share (o) Pension and Postretirement Benefits We account for our pension and postretirement benefits under ASC 715, Compensation — Retirement Benefits 715” 715 not December 31. (p) Product Warranty Obligations We provide warranty coverage for certain of our solutions. We recognize a product warranty obligation when claims are probable and can be reasonably estimated. As of December 31, 2023 2022 not (q) Loss Contingencies We accrue for costs relating to litigation, claims, and other contingent matters when such liabilities become probable and reasonably estimable. Such estimates are based on management’s judgment. Actual amounts paid may In the ordinary course of business, we enter into numerous agreements that contain standard indemnities whereby we indemnify another party for breaches of confidentiality, infringement of intellectual property or gross negligence. Such indemnifications are primarily granted under licensing of computer software. Most agreements contain provisions to limit the maximum potential amount of future payments that we could be required to make under these indemnifications; however, we are not not (r) Goodwill and Indefinite-Lived Intangible Assets Goodwill represents the excess of acquisition costs over the fair value of tangible net assets and identifiable intangible assets of our businesses acquired. Goodwill and intangible assets deemed to have indefinite lives are not June 30, may not may first not not not (s) Recent Accounting Pronouncements Accounting Standard Description Effective Date Effect on Consolidated Financial Statements or Other Significant Matters Leases (Topic 842 March 2023, No. 2023 01, No. 2023 01" This update amends the accounting for leasehold improvements in common-control arrangements for all entities. The amendment requires a lessee in a common-control lease arrangement to amortize leasehold improvements that it owns over the improvements’ useful life to the common control group, regardless of the lease term, if the lessee continues to control the use of the underlying asset through a lease. ASU No. 2023 01 December 15, 2023, The adoption of this guidance is not Segment Reporting (Topic 280 November 2023, No. 2023 07, No. 2023 07" This updates changes the reportable segment disclosure requirements requiring enhanced disclosures about significant segment expenses. Public entities are required to disclose significant segment expenses that are regularly provided to the chief operating decision maker and to disclose how reported measures of segment profit or loss are used in assessing segment performance and allocating resources. ASU No. 2023 07 December 15, 2023, December 15, 2024. The adoption of this guidance is not Income Taxes (Topic 740 December 2023, No. 2023 09, No. 2023 09 The amendments in within ASU No. 2023 09 The ASU’s amendments are effective for public business entities for fiscal years beginning after December 15, 2024. The adoption of this guidance is not

Note 3 - Cash and Cash Equivale

Note 3 - Cash and Cash Equivalents	12 Months Ended
Note 3 - Cash and Cash Equivalents	Dec. 31, 2023
Notes to Financial Statements
Cash and Cash Equivalents Disclosure [Text Block]	3. Cash and cash equivalents consist of cash in banks, commercial paper, money-market funds, and other liquid instruments with original maturities of 90

Note 4 - Accounts Receivable

Note 4 - Accounts Receivable	12 Months Ended
Note 4 - Accounts Receivable	Dec. 31, 2023
Notes to Financial Statements
Accounts and Nontrade Receivable [Text Block]	4. Accounts receivable, net consisted of the following at December 31: 2023 2022 Billed receivables $ 317.1 $ 273.7 Unbilled receivables 32.2 30.7 Total receivables 349.3 304.4 Less allowance for doubtful accounts (15.1 ) (14.3 ) Accounts receivable, net $ 334.2 $ 290.1

Note 5 - Concentration of Credi

Note 5 - Concentration of Credit Risk	12 Months Ended
Note 5 - Concentration of Credit Risk	Dec. 31, 2023
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	5. Financial instruments that potentially exp ose us to credit risk consist primarily of cash and cash equivalents as well as accounts receivable, net, which are generally not December 31, 2023 December 31, 2022, December 31, 2023 2022 . As of December 31, 2023 2022 , we had cash balances on deposit with seven and five banks that exceeded the balance insured by the FDIC limit by approximat el y $171.8 million and $36.0 million, respectively. As of December 31, 2023 2022 , we also had cash on deposit with foreign banks of approximately $129.2 million and $74.9 million, respectively. We consider the concentration of credit risk associated with our accounts receivable to be commercially reasonable and believe that such concentration does not 2023 , 41% for 2022 and 38% for 2021 , respectively, with no individual customer accounting for more than approximately 3% of revenues for the years ended December 31, 2023 , 2022 , and 2021 respectively. No individual customer comprised more than approximately 5% and 6% December 31, 2023 2022 , respectively.

Note 6 - Revenues

Note 6 - Revenues	12 Months Ended
Note 6 - Revenues	Dec. 31, 2023
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	6. Disaggregated revenues by type of service and by country are provided below for the years ended December 31, 2023, 2022, 2021 No 10.0% December 31, 2023 2022 2021 2023 2022 2021 Insurance: Underwriting $ 1,892.7 $ 1,734.5 $ 1,555.1 Claims 788.7 702.5 651.8 Total Insurance 2,681.4 2,437.0 2,206.9 Specialized Markets — 22.4 112.8 Financial Services — 37.6 142.8 Total revenues $ 2,681.4 $ 2,497.0 $ 2,462.5 2023 2022 2021 Revenues: United States $ 2,238.3 $ 2,120.1 $ 2,057.7 United Kingdom 190.1 169.5 169.0 Other countries 253.0 207.4 235.8 Total revenues $ 2,681.4 $ 2,497.0 $ 2,462.5 Contract assets are defined as an entity's right to consideration in exchange for goods or services that the entity has transferred to a customer when that right is conditioned on something other than the passage of time. As of December 31, 2023 2022 Contract liabilities are define d as an entity's obligation to transfer goods or services to a customer for which the entity has received consideration (or an amount of consideration is due) from the customer. As of December 31, 2023 2022 , we had contract liabilities that primarily related to unsatisfied performance obligations to provide customers with the right to use and update the online content over the remaining contract term of $375.1 million and $321.7 million, respectively. Contract liabilities, which are current and noncurrent, are included in "Deferred revenues" and "Other noncurrent liabilities" in our consolidated balance sheets, respectively, as of December 31, 2023 2022 . The following is a summary of the change in contract liabilities from December 31, 2020 December 31, 2022: Contract Liabilities at December 31, 2021 $ 349.3 Revenue (2,497.0 ) Acquisitions 3.4 Dispositions (61.0 ) Billings 2,527.0 Contract Liabilities at December 31, 2022 321.7 Revenue (2,681.4 ) Foreign currency translation adjustment (3.0 ) Billings 2,737.8 Contract Liabilities at December 31, 2023 $ 375.1 Our most significant remaining performance obligations relate to providing customers with the right to use and update the online content over the remaining contract term. Our disclosure of the timing for satisfying the performance obligation is based on the requirements of contracts with customers. However, from time to time, these contracts may one December 31, 2023 2022 , respectively. We recognize an asset for incremental costs of obtaining a contract with a customer if we expect the benefits of those costs to be longer than one December 31, 2023 2022 , we had deferred commissions of $76.4 million and $69.7 million, resp

Note 7 - Investments and Fair V

Note 7 - Investments and Fair Value Measurements	12 Months Ended
Note 7 - Investments and Fair Value Measurements	Dec. 31, 2023
Notes to Financial Statements
Fair Value Disclosures [Text Block]	7. Certain assets and liabilities are reported at fair value in our accompanying consolidated balance sheets. Such assets and liabilities include amounts for both financial and non-financial instruments. To increase consistency and comparability of assets and liabilities recorded at fair value, ASC 820 10 three 820 10 820 10, Level 1 Level 2 Level 3 not The fair value of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities, and short-term debt approximate their carrying amounts because of the short-term nature of these instrume nts. Our investments in registered investment companies, which are Level 1 December 31, 2023 2022 , respectively. Our investments in registered investment companies have been included in "Other current assets" in our consolidated balance sheets as of December 31, 2023 2022 We elected not December 31, 2023 2022 2023 2022 Fair Value Carrying Estimated Carrying Estimated Hierarchy Value Fair Value Value Fair Value Financial instrument not carried at fair value: Senior Notes (Note 15) Level 2 $ 2,833.7 $ 2,735.3 $ 2,342.6 $ 2,113.3 As of December 31, 2023 2022 , we had securities without readily determinable market values of $200.9 million and $201.5 million, respectively, which were accounted for at cost. We do not not December 31, 2023 2022 , we also had investments in private companies of $30.5 milli on and $28.3 million, respectively, accounted for in accordance with ASC 323 10 25, The Equity Method of Accounting for Investments in Common Stock ("ASC 323 10 25" December 31, 2023 2022

Note 8 - Leases

Note 8 - Leases	12 Months Ended
Note 8 - Leases	Dec. 31, 2023
Notes to Financial Statements
Lessee, Operating and Finance Leases [Text Block]	8. We have operating and finance leases for corporate offices, data centers, and certain equipment that are accounted for under ASC 842. 2033 one two The following table presents the consolidated lease cost and cash paid for amounts included in the measurement of lease liabilities for finance and operating leases for the years ended December 31, 2023 2022: 2023 2022 Lease cost: Operating lease cost (1) $ 33.9 $ 47.7 Sublease income (1.7 ) (2.0 ) Finance lease cost Depreciation of finance lease assets (2) 14.4 12.8 Interest on finance lease liabilities (3) 1.0 0.5 Total lease cost $ 47.6 $ 59.0 Other information: Cash paid for amounts included in the measurement of lease liabilities Operating cash outflows from operating leases $ (34.9 ) $ (46.4 ) Operating cash outflows from finance leases $ (1.0 ) $ (0.5 ) Financing cash outflows from finance leases $ (15.7 ) $ (14.3 ) _______________ ( 1 ( 2 Included in "Depreciation and amortization of fixed assets" in our accompanying consolidated statements of operations ( 3 The following table presents weighted-average remaining lease terms and weighted-average discount rates for the consolidated finance and operating leases for the years ended December 31, 2023 2022: 2023 2022 Weighted-average remaining lease term - operating leases (in years) 8.2 8.5 Weighted-average remaining lease term - finance leases (in years) 3.1 1.7 Weighted-average discount rate - operating leases 4.0 % 3.8 % Weighted-average discount rate - finance leases 4.2 % 2.6 % Our ROU assets and lease liabilities for finance leases were $41.2 million and $34.5 million, respectively, as of December 31, 2023 December 31, 2022. Note 15 Maturities of the continuing lease liabilities for the years through 2029 Years Ending Operating Leases Finance Leases 2024 $ 33.3 $ 15.6 2025 34.1 13.8 2026 32.6 3.4 2027 32.4 2.6 2028 31.7 1.7 2029 and thereafter 104.3 - Total lease payments 268.4 37.1 Less: Amount representing interest (39.7 ) (2.6 ) Present value of total lease payments $ 228.7 $ 34.5

Note 9 - Fixed Assets

Note 9 - Fixed Assets	12 Months Ended
Note 9 - Fixed Assets	Dec. 31, 2023
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	9. The following is a summary of fixed assets: Useful Life (in years) Cost Accumulated Depreciation and Amortization Net December 31, 2023 Furniture and office equipment 3 - 10 $ 178.5 $ (156.7 ) $ 21.8 Leasehold improvements Lease term 116.5 (63.0 ) 53.5 Purchased software 3 59.9 (55.2 ) 4.7 Software development costs 3 - 7 1,136.6 (653.0 ) 483.6 Leased equipment 3 - 4 105.1 (63.8 ) 41.3 Total fixed assets $ 1,596.6 $ (991.7 ) $ 604.9 December 31, 2022 Furniture and office equipment 3 - 10 $ 199.2 $ (177.1 ) $ 22.1 Leasehold improvements Lease term 118.3 (54.6 ) 63.7 Purchased software 3 65.1 (61.0 ) 4.1 Software development costs 3 - 7 945.4 (504.5 ) 440.9 Leased equipment 3 - 4 64.4 (53.7 ) 10.7 Total fixed assets $ 1,392.4 $ (850.9 ) $ 541.5 D epreciation and amortization of fixed assets for the years ended December 31, 2023, 2022, 2021 were $206.8 million, $164.2 million, and $170.3 million, of which $165.5 million, $ million, and $ million related to amortization of internal-use software development costs, respectively. Amortization expense related to development of software for sale in accordance with ASC 985 20 December 31, 2023, 2022, 2021 , respectively. We had unamortized software development costs that had been capitalized in accordance with ASC 350 40 December 31, 2023 2022 , respectively. We had unamortized software development costs that had been capitalized in accordance with ASC 985 20 December 31, 2023 2022 , respectively. Leased assets include amounts held under finance leases for automobiles, computer software, and computer equipment.

Note 10 - Acquisitions

Note 10 - Acquisitions	12 Months Ended
Note 10 - Acquisitions	Dec. 31, 2023
Notes to Financial Statements
Business Combination Disclosure [Text Block]	10. 2023 Acquisitions On April 20, 2023, On February 1, 2023, The "Other" column includes other immaterial acquisitions that have occurred during the period. The preliminary purchase price allocation of the 2023 Krug Other Total Cash and cash equivalents $ 7.0 $ 1.0 $ 8.0 Accounts receivable 1.8 0.8 2.6 Other current assets 3.8 0.1 3.9 Fixed assets 0.2 0.1 0.3 Operating lease right-of-use assets, net — 0.2 0.2 Intangible assets 15.1 18.4 33.5 Goodwill 33.1 22.8 55.9 Total assets acquired 61.0 43.4 104.4 Accounts payable and accrued liabilities 5.8 2.1 7.9 Operating lease liabilities — 0.1 0.1 Deferred income tax, net 4.8 3.9 8.7 Other noncurrent liabilities 0.1 1.4 1.5 Total liabilities assumed 10.7 7.5 18.2 Net assets acquired 50.3 35.9 86.2 Less: cash acquired 7.0 1.0 8.0 Net cash purchase price $ 43.3 $ 34.9 $ 78.2 The preliminary amounts assigned to intangible assets by type for our 2023 Weighted Average Useful Life (in years) Total Technology-based 5 $ 9.9 Marketing-related 2 0.5 Customer-related 13 23.1 Total intangible assets $ 33.5 The preliminary allocations of the purchase price for th e 2023 2022 may not one not he $55.9 m not For the year ended December 31, 2023, Our 2023 not December 31, 2023, 2022, 2021, not 2022 On March 1, 2022, On February 11, 2022, The final purchase price allocations, inclusive of closing adjustments, of our 2022 Opta Infutor Others Total Cash and cash equivalents $ 0.4 $ 17.0 $ - $ 17.4 Accounts receivable 5.2 10.7 - 15.9 Other current assets 1.3 3.8 0.1 5.2 Fixed assets 1.5 0.9 0.3 2.7 Operating lease right-of-use assets, net 1.1 2.3 - 3.4 Intangible assets 87.0 83.4 2.3 172.7 Goodwill 141.1 140.3 3.0 284.4 Other assets - 0.1 - 0.1 Total assets acquired 237.6 258.5 5.7 501.8 Current liabilities 4.9 14.4 0.1 19.4 Deferred revenues 0.2 3.1 0.1 3.4 Operating lease liabilities 1.1 3.3 - 4.4 Deferred income tax, net 13.5 - 0.5 14.0 Other liabilities - - 0.2 0.2 Total liabilities assumed 19.7 20.8 0.9 41.4 Net assets acquired 217.9 237.7 4.8 460.4 Less: Cash acquired 0.4 17.0 - 17.4 Net cash purchase price $ 217.5 $ 220.7 $ 4.8 $ 443.0 The final amounts assigned to intangible assets by type for our 2022 Weighted Average Useful Life (in years) Total Technology-based 6 $ 48.5 Marketing-related 4 2.0 Customer-related 13 122.2 Total intangible assets $ 172.7 For the year ende d December 31, 2023, 2022 805, Business Combinations 805" not December 31, 2023 2022. Of the $284.4 million in goodwill associated with our acquisitions, $144.5 million is not December 31, 2022, Note 12 . Goodwill and Intangible Assets for further discussion. Our 2022 not December 31, 2022 2021, not 2021 On December 23, 2021, On November 2, 2021, On September 1, 2021, On June 17, 2021, On March 2, 2021, three three The final purchase price allocations, inclusive of closing adjustments, of our 2021 ACTINEO Data Driven Safety Others Total Cash and cash equivalents $ 0.2 $ 2.5 $ 3.7 $ 6.4 Accounts receivable 1.8 1.0 1.4 4.2 Other current assets — 2.0 1.0 3.0 Fixed assets 1.4 — 0.1 1.5 Operating lease right-of-use assets, net 4.2 0.4 1.3 5.9 Intangible assets 48.3 42.1 19.0 109.4 Goodwill 121.9 74.1 39.6 235.6 Other assets — — 0.1 0.1 Total assets acquired 177.8 122.1 66.2 366.1 Current liabilities 2.1 2.7 1.7 6.5 Deferred revenues — 0.4 1.4 1.8 Operating lease liabilities 4.2 0.4 1.4 6.0 Deferred income tax, net 15.8 — 3.7 19.5 Other liabilities — 21.7 — 21.7 Total liabilities assumed 22.1 25.2 8.2 55.5 Net assets acquired 155.7 96.9 58.0 310.6 Less: Noncontrolling interests 6.6 — 19.8 26.4 Cash acquired 0.2 3.4 3.7 7.3 Net cash purchase price $ 148.9 $ 93.5 $ 34.5 $ 276.9 The final amounts assigned to intangible assets by type for our 2021 Weighted Average Useful Life (in years) Total Technology-based 5 $ 21.1 Marketing-related 3 1.1 Customer-related 13 81.2 Database-related 6 6.0 Total intangible assets $ 109.4 For the year ended December 3 1, 2022, 2021 805 . The impact of finalization of the purchase accounting associated with these acquisitions was not December 31, 2021. Of the $235.6 million in goodwill associated with our acquisitions, $161.3 million is not December 31, 2021, Note 12 . Goodwill and Intangible Assets for further discussion. Our 2021 not not Acquisition Escrows and Related Liabilities Pursuant to the related acquisition agreements, we have funded various escrow accounts to satisfy pre-acquisition indemnity and tax claims arising subsequent to the acquisition dates, as well as a portion of the contingent payment. During the years ended December 31, 2023 2022, leased $ 0.0 million and $12.8 million of indemnity escrows related to various acquisitions. At December 31, 2023 2022, $3.9 million and $0.0 million. There were no The current and noncurrent portions of the escrows have been included in "Other current assets" and "Other noncurrent assets" in our accompanying consolidated balance sheets, respectively. The acquisitions of Infutor Data Solutions, LLC, Krug, Mavera, and Morning Data Limited included acquisition-related contingent payments, for which the sellers of these acquisitions could receive additional payments by achieving the specific predetermined revenue, EBITDA, and EBITDA margin earn-out targets for exceptional performance. We believe that the liabilities recorded as of December 31, 2023 2022 $10.0 million and $29.9 million as of December 31, 2023 2022, $2.1 million and $0.0 million a s of December 31, 2023 2022, respectively.

Note 11 - Dispositions and Disc

Note 11 - Dispositions and Discontinued Operations	12 Months Ended
Note 11 - Dispositions and Discontinued Operations	Dec. 31, 2023
Notes to Financial Statements
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	11. Discontinued Operations On February 1, 2023, The Energy business, which was part of our Energy and Specialized Markets segment, was classified as discontinued operations per ASC 205 20 December 31, 2022. February 1, 2023, second fourth 2023, The following table presents the financial results from discontinued operations, net of income taxes in our consolidated statement of income for the periods indicated: For the Year Ended December 31, 2023 2022 2021 Revenues $ 46.8 $ 537.3 $ 536.1 Operating expenses: Cost of revenues (exclusive of items shown separately below) 18.2 207.4 204.1 Selling, general and administrative 33.2 117.2 109.5 Depreciation and amortization of fixed assets - 32.9 36.6 Amortization of intangible assets - 68.5 96.8 Impairment loss - 303.7 - Other operating loss 131.1 33.9 - Total operating expenses 182.5 763.6 447.0 Operating (loss) income (135.7 ) (226.3 ) 89.1 Other income (expense): Investment income (loss) and others, net (5.7 ) 7.0 (0.2 ) Total other income (expense), net (5.7 ) 7.0 (0.2 ) (Loss) income from discontinued operations before income taxes (141.4 ) (219.3 ) 88.9 Income tax (expense) benefit (12.6 ) 131.5 (29.7 ) (Loss) income from discontinued operations, net of income taxes $ (154.0 ) $ (87.8 ) $ 59.2 The following table presents the aggregate carrying amounts of the held for sale assets and liabilities of the Energy business in the consolidated balance sheet as of the date indicated: February 1, 2023 December 31, 2022 Cash and cash equivalents $ 86.3 $ 180.2 Accounts receivable, net 187.1 150.8 Prepaid expenses 17.6 17.8 Other current assets 13.8 13.8 Total current assets: 304.8 362.6 Fixed assets, net 165.2 157.1 Operating lease right-of-use assets, net 29.7 29.8 Intangible assets, net 625.9 616.9 Goodwill 2,165.7 2,136.3 Other noncurrent assets 18.9 16.3 Total noncurrent assets 3,005.4 2,956.4 Total assets held for sale: 3,310.2 3,319.0 Net impairment of asset group(1) (227.8 ) (227.8 ) Total assets held for sale, net $ 3,082.4 $ 3,091.2 Accounts payable and accrued liabilities $ 77.6 $ 68.6 Operating lease liabilities 7.6 6.9 Deferred revenues 207.4 176.6 Income taxes payable 13.6 30.2 Current liabilities held-for-sale: 306.2 282.3 Deferred income tax liabilities 146.2 144.1 Noncurrent lease liabilities 30.0 30.8 Other noncurrent liabilities 2.5 2.7 Noncurrent liabilities held-for-sale 178.7 177.6 Total liabilities held for sale $ 484.9 $ 459.9 ( 1 $303.7 $75.9 205 20, Discontinued Operations. The consolidated statements of cash flows have not For the Year Ended December 31, 2023 2022 2021 Significant non-cash operating activities: Depreciation and amortization of fixed assets $ - $ 32.9 $ 36.6 Amortization of intangible assets - 68.5 96.8 Impairment loss - 303.7 - Operating lease right-of-use assets, net 0.1 7.6 7.7 Investing activities: Capital expenditures (6.5 ) (72.6 ) (59.7 ) Supplemental disclosures: Fixed assets included in accounts payable and accrued liabilities - 3.0 5.0

Note 12 - Goodwill and Intangib

Note 12 - Goodwill and Intangible Assets	12 Months Ended
Note 12 - Goodwill and Intangible Assets	Dec. 31, 2023
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	12. The following is a summary of the change in goodwill from January 1, 2022 December 31, 2023 Insurance Specialized Markets Financial Services Total Goodwill at January 1, 2022 $ 1,454.8 $ 117.4 $ 475.4 $ 2,047.6 Acquisitions 284.4 — — 284.4 Purchase accounting reclassifications (0.5 ) — — (0.5 ) Disposition of sold businesses — (116.5 ) (473.2 ) (589.7 ) Impairment Charge — — (1.7 ) (1.7 ) Foreign currency translation adjustment (62.7 ) (0.9 ) (0.5 ) (64.1 ) Goodwill at December 31, 2022 1,676.0 — — 1,676.0 Acquisitions 55.9 — — 55.9 Purchase accounting reclassifications (0.1 ) — — (0.1 ) Foreign currency translation adjustment 29.0 — — 29.0 Goodwill at December 31, 2023 $ 1,760.8 $ — $ — $ 1,760.8 Goodwill and intangible assets with indefinite lives are subject to impairment testing annually as of June 30, may not may first not not not June 30, 2023, not not not not Impairments to long-lived assets for the twelve December 31, 2023 2022 Our intangible assets and related accumulated amortization consisted of the following: Weighted Average Useful Life Accumulated (in years) Cost Amortization Net December 31, 2023 Technology-based 8 $ 370.2 $ (261.2 ) $ 109.0 Marketing-related 6 42.7 (38.7 ) 4.0 Contract-based 6 5.0 (5.0 ) - Customer-related 13 542.1 (190.7 ) 351.4 Database-based 8 15.2 (7.9 ) 7.3 Total intangible assets $ 975.2 $ (503.5 ) $ 471.7 December 31, 2022 Technology-based 8 $ 355.1 $ (229.3 ) $ 125.8 Marketing-related 6 41.3 (35.5 ) 5.8 Contract-based 6 5.0 (5.0 ) — Customer-related 13 510.7 (146.7 ) 364.0 Database-based 8 15.0 (5.8 ) 9.2 Total intangible assets $ 927.1 $ (422.3 ) $ 504.8 Amortization expense related to intangible assets for the years ended December 31, 2023, 2022, 2021 s $74.6 million 2029 Years Ending Amount 2024 $ 72.2 2025 63.1 2026 61.1 2027 52.8 2028 45.7 2029 and thereafter 176.8 Total $ 471.7

Note 13 - Income Taxes

Note 13 - Income Taxes	12 Months Ended
Note 13 - Income Taxes	Dec. 31, 2023
Notes to Financial Statements
Income Tax Disclosure [Text Block]	13. Domestic and foreign income before income taxes was as follows: 2023 2022 2021 U.S. $ 1,021.9 $ 1,277.1 $ 784.1 Foreign 5.3 (14.7 ) 2.4 Total income before income taxes $ 1,027.2 $ 1,262.4 $ 786.5 The components of the provision for income taxes for the years ended December 31 2023 2022 2021 Current: Federal $ 226.8 $ 247.8 $ 123.8 State and local 52.0 64.7 19.5 Foreign 9.0 1.1 3.0 Total current provision for income taxes 287.8 313.6 146.3 Deferred: Federal (23.4 ) (43.3 ) 20.6 State and local (3.4 ) (11.2 ) 10.5 Foreign (2.2 ) (38.8 ) 2.0 Total deferred provision for income taxes (29.0 ) (93.3 ) 33.1 Provision for income taxes $ 258.8 $ 220.3 $ 179.4 The reconciliation between our effective tax rate and the statutory tax rate is as follows for the years ended December 31: 2023 2022 2021 Federal statutory rate 21.0 % 21.0 % 21.0 % State and local taxes, net of federal tax benefit 3.7 3.4 2.8 Impact of dispositions - (3.0 ) - UK valuation allowance release - (2.4 ) - Global Intangible Low-taxed Income 1.3 0.4 2.6 Stock-based compensation (1.8 ) (1.7 ) (3.5 ) Other 1.0 (0.2 ) (0.1 ) Effective tax rate 25.2 % 17.5 % 22.8 % The increase in the effective tax rate in 2023 2022 2022 3E 2023 first The tax effects of significant items comprising our deferred tax assets and liabilities as of December 31 2023 2022 Deferred tax assets: Employee wages and other benefits $ 49.9 $ 54.9 Lease liabilities 55.4 53.3 Net operating loss carryover 9.4 12.0 Interest expense 31.0 31.1 Book/tax energy basis difference - 112.2 Other 17.1 22.0 Total 162.8 285.5 Less valuation allowance (5.6 ) (45.3 ) Deferred tax assets 157.2 240.2 Deferred tax liabilities: Right of use assets (48.3 ) (44.1 ) Fixed assets and intangible assets (194.1 ) (223.9 ) Commissions (18.2 ) (16.8 ) Pensions (57.0 ) (56.5 ) Other (18.9 ) (12.8 ) Deferred tax liabilities (336.5 ) (354.1 ) Deferred tax liabilities, net $ (179.3 ) $ (113.9 ) The net deferred tax liabilitie s of $179.3 million consist prim Our net operating loss carryforwards expire as follows: Years Ending Amount 2024 - 2031 $ 20.5 2032 - 2036 11.5 2037 - 2043 37.0 Total $ 69.0 A valuation allowance has been established based on our evaluation of the likelihood of utilizing these benefits before they expire. Other than these items, we have determined, based on our historical operating performance, that our taxable income will more likely than not As of December 31, 2023 not not not We follow ASC 740 10 not not No may not not 2023 2022 2021 Unrecognized tax benefit as of January 1 $ 3.2 $ 3.4 $ 9.9 Gross increase in tax positions in prior period 0.8 1.0 1.3 Gross decrease in tax positions in prior period - - (0.1 ) Settlements - (0.6 ) — Lapse of statute of limitations (2.0 ) (0.6 ) (7.7 ) Unrecognized tax benefit as of December 31 $ 2.0 $ 3.2 $ 3.4 All unrecognized tax benefits as of December 31, 2023 2022 2021 would have a favorable impact on our effective tax rate if recognized in any future periods. The total gross amount of accrued interest and penalties for the years ended December 31, 2023 , 2022 , and 2021 was $0.2 million, $0.4 million, and $0.5 million, respectively. Our practice is to recognize interest and penalties associated with income taxes as a component of “Provision for income taxes” in our accompanying consolidated statements of operations. We do not may 2024 We are subject to tax in the U.S., various state, and foreign jurisdictions, and are routinely under audit by various tax authorities. With few exceptions, we are no 2019. not

Note 14 - Composition of Certai

Note 14 - Composition of Certain Financial Statement Caption	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
Accounts Payable and Accrued Liabilities Disclosure [Text Block]	14. The following table presents the components of “Accounts payable and accrued liabilities” as of December 31: 2023 2022 Accounts payable and accrued liabilities: Accrued salaries, benefits and other related costs $ 149.4 $ 117.4 Escrow liabilities 3.9 0.4 Accrued interest 19.1 16.3 Trade accounts payable and other accrued expenses 158.4 128.7 Acquisition-related liabilities 10.0 30.0 Total accounts payable and accrued liabilities $ 340.8 $ 292.8 The following table presents the components of "Other noncurrent assets" as of December 31: 2023 2022 Other noncurrent assets: Pension benefits $ 121.4 $ 89.0 Other assets - prepaid expenses 73.2 50.7 Investments in nonpublic companies 231.4 229.8 State income tax receivable 67.7 - Deposits and other 2.4 1.9 Total other noncurrent assets $ 496.1 $ 371.4

Note 15 - Debt

Note 15 - Debt	12 Months Ended
Note 15 - Debt	Dec. 31, 2023
Notes to Financial Statements
Debt Disclosure [Text Block]	15. The following table presents short-term and long-term debt by issuance as of December 31: Issuance Maturity Date Date 2023 2022 Short-term debt and current portion of long-term debt: Credit Facilities: Syndicated revolving credit facility Various Various $ - $ 990.0 Bilateral revolving credit facility Various Various - 275.0 Bilateral term loan facility Various Various - 125.0 Finance lease liabilities (1) Various Various 14.5 2.9 Short-term debt and current portion of long-term debt 14.5 1,392.9 Long-term debt: Senior notes: 3.625 9.6 10.0 5/13/2020 5/15/2050 490.4 490.0 4.125 7.8 9.4 3/6/2019 3/15/2029 607.8 609.4 4.000 1.8 2.8 5/15/2015 6/15/2025 898.2 897.2 5.500 3.8 4.0 5/15/2015 6/15/2045 346.2 346.0 5.750 8.9 0 3/3/2023 4/1/2033 491.1 - Finance lease liabilities (1) Various Various 20.0 1.3 Syndicated revolving credit facility debt issuance costs Various Various (1.5 ) (0.7 ) Long-term debt 2,852.2 2,343.2 Total debt $ 2,866.7 $ 3,736.1 _______________ ( 1 Note 8 Accrued interest associated with our outstand ing debt obligations was $19.1 and $16.3 million as of December 31, 2023 2022 , respectively, and included in “Accounts payable and accrued liabilities” within our accompanying consolidated balance sheets. Interest expense associated with our finance lease and outstanding debt obligations, including amortization of debt issuance costs and original discounts, wa s $131.3 m illion, $ 135.5 million, and $127.0 million for the years ended December 31, 2023, 2022, 2021 , respectively. Senior Notes As of December 31, 2023 December 31, 2022, On March 3, 2023, 2033 "2033 2033 April 1, 2033 April 1st October 1st October 1, 2023. 2033 2033 2033 2033 Credit Facilities We have a syndicated revolving credit facility ("Syndicated Revolving Credit Facility") with a borrowing capacity of $1,000.0 million with Bank of America N.A., HSBC Bank USA, N.A., JP Morgan Chase Bank, N.A., Wells Fargo Bank, National Association, Citibank, N.A., Morgan Stanley Bank, N.A., TD Bank, N.A., Goldman Sachs Bank USA, and the Northern Trust Company. The Syndicated Revolving Credit Facility may December 31, 2023, December 31, 2023 2022, On April 5, 2023, not April 5, 2028. may 1.0. 1.0 no 1.0 no may We also maintained a $125.0 million Bilateral Term Loan Facility and a $275.0 million Bilateral Credit Facility (together the "Bilateral Credit Facilities") that matured on September 9, 2023 October 2, 2023, one no 2023 not Debt Maturities The following table reflects our debt maturities: Years Ending Amount 2024 $ 14.4 2025 913.3 2026 2.9 2027 2.3 2028 1.4 2029 and thereafter 1,950.0 Total $ 2,884.3

Note 16 - Stockholders' Equity

Note 16 - Stockholders' Equity	12 Months Ended
Note 16 - Stockholders' Equity	Dec. 31, 2023
Notes to Financial Statements
Equity [Text Block]	16. We have 2,000,000,000 shares of authorized common stock as of December 31, 2023 2022 rights to any dividend declared by our Board of Directors, subject to any preferential or other rights of any outstanding preferred stock, and voting rights to elect all eleven December 31, 2023, 2022, 2021 , the adjusted closing price of our common stoc as $238.86, $176.42, and $228.73 per share, respectively. We have 80,000,000 shares of authorized preferred stock, par value $0.001 per share. The preferred shares have preferential rights over the common shares with respect to dividends and net distribution upon liquidation. We did not December 31, 2023 2022 . On February 14, 2023, April 25, 2023, July 26, 2023, October 25, 2023, March 15, 2023, June 15, 2023, September 15, 2023, December 15, 2023, December 31, 2023 2022, . Share Repurchase Program In December 2022 March 2023, "December 2022 "March 2023 December 2022 March 2023 815 40, Contracts in Entity's Own Equity 815 40" zero December 14, 2022 March 7, 2023, February 2023 December 2023, December 31, 2023 . These repurchases for the year ended December 31, 2023 resulted in a reduction of outstanding shares used to calculate the weighted average common shares outstanding for basic and diluted earnings per share ("EPS"). In December 2023, December 14, 2023, February 2024, For the year ended December 31, 2023, December 31, 2023, Treasury Stock As of December 31, 2023 , our treasury stock consisted of 400,694,309 shares of common stock. During the years ended December 31, 2023, 2022, 2021 , we transferred 1,457,514, 1,650,460, and 1,379,304 shares of common stock, from the treasury shares at a weighted average price of $19.50, $14.25, and $11.78 per share, respectively. Earnings Per Share The following is a reconciliation of the numerators and denominators of our basic and diluted EPS computations for the years ended December 31: 2023 2022 2021 (In millions, except for share and per share data) Numerator used in basic and diluted EPS: Income from continuing operations $ 768.4 $ 1,042.1 $ 607.1 Less: Net loss (income) attributable to noncontrolling interests 0.2 (0.4 ) (0.1 ) Income from discontinued operations, net of tax (154.0 ) (87.8 ) 59.2 Net income attributable to Verisk $ 614.6 $ 953.9 $ 666.2 Denominator: Weighted average number of common shares used in basic EPS 146,623,989 157,905,718 161,841,441 Effect of dilutive shares: Potential common shares issuable from stock options and stock-based awards 712,170 1,023,224 1,497,468 Weighted average number of common shares and dilutive potential common shares used in diluted EPS 147,336,159 158,928,942 163,338,909 The potential shares of common stock that were excluded from diluted EPS were 540,221, 1,350,159, and 620,241 at December 31, 2023, 2022, 2021 Accumulated Other Comprehensive Losses The following is a summary of accumulated other comprehensive income (losses) as of December 31: 2023 2022 Foreign currency translation adjustment $ 130.7 $ (636.9 ) Pension and postretirement adjustment, net of tax (72.5 ) (94.3 ) Accumulated other comprehensive income (losses) $ 58.2 $ (731.2 ) The before tax and after tax amounts of other comprehensive (loss) income for the years ended December 31, 2023, 2022, 2021 Tax Benefit Before Tax (Expense) After Tax December 31, 2023 Foreign currency translation adjustment attributable to Verisk $ 67.0 $ — $ 67.0 Foreign currency translation adjustment attributable to noncontrolling interests 0.6 — 0.6 Cumulative translation adjustment recognized upon deconsolidation of the Energy business 700.6 — 700.6 Foreign currency translation adjustment 768.2 — 768.2 Pension and postretirement adjustment before reclassifications 35.1 (8.9 ) 26.2 Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive income (losses) (1) (5.8 ) 1.4 (4.4 ) Pension and postretirement adjustment 29.3 (7.5 ) 21.8 Total other comprehensive income $ 797.5 $ (7.5 ) $ 790.0 December 31, 2022 Foreign currency translation adjustment attributable to Verisk $ (298.9 ) $ — $ (298.9 ) Foreign currency translation adjustment attributable to noncontrolling interests (1.4 ) — (1.4 ) Foreign currency translation adjustment (300.3 ) — (300.3 ) Pension and postretirement adjustment before reclassifications (45.7 ) 13.5 (32.2 ) Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive income (losses) (1) (4.4 ) (1.1 ) (5.5 ) Pension and postretirement adjustment (50.1 ) 12.4 (37.7 ) Total other comprehensive loss $ (350.4 ) $ 12.4 $ (338.0 ) December 31, 2021 Foreign currency translation adjustment $ (45.8 ) $ — $ (45.8 ) Foreign currency translation adjustment attributable to noncontrolling interests (0.5 ) — (0.5 ) Foreign currency translation adjustment (46.3 ) — (46.3 ) Pension and postretirement adjustment before reclassifications 39.8 (9.8 ) 30.0 Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive income (losses) (1) (4.1 ) 1.0 (3.1 ) Pension and postretirement adjustment 35.7 (8.8 ) 26.9 Total other comprehensive loss $ (10.6 ) $ (8.8 ) $ (19.4 ) _______________ ( 1 These accumulated other comprehensive loss components, before tax, are included under “Cost of revenues” and “Selling, general and administrative” in our accompanying consolidated statements of operations. These components are also included in the computation of net periodic (benefit) cost (See Note 18

Note 17 - Compensation Plans

Note 17 - Compensation Plans	12 Months Ended
Note 17 - Compensation Plans	Dec. 31, 2023
Notes to Financial Statements
Share-Based Payment Arrangement [Text Block]	17. KSOP We have established the KSOP for the benefit of eligible employees in the U.S. and Puerto Rico. The KSOP includes both an employee savings component and an employee stock ownership component. The purpose of the combined plan is to enable our employees to participate in a tax-deferred savings arrangement under Internal Revenue Service Code Sections 401 401 Under the KSOP, eligible employees may 401 401 2023 , $20.5 thousand for 2022 and $19.5 thousand for 2021 . Certain eligible participants (age 50 and older) may 2023 , and $6.5 thousand for 2022 and 2021 . After-tax contributions are limited to 10.0% of a participant’s compensation. Effective January 1, 2019, first 401 December 31, 2023, 2022, 2021 , were $32.4 million, $40.0 million, and $33.7 million, respectively; which, at our option, were funded in cash. In 2005, March 1, 2005. 1,000 December 31 four 1,000 December 31, 2023, 2022, 2021 Equity Compensation Plans All of our outstanding stock options, restricted stock awards, deferred stock units, and PSUs are covered under our 2021 2013 2021 may one 2021 December 31, 2023, 2021 December 31, 2023 December 31, 2022 may A summary of the status of the stock options, restricted stock, and PSUs awarded under our 2021 December 31, 2023, 2022, 2021 Stock Option Restricted Stock PSU Weighted Weighted Weighted Average Average Average Aggregate Grant Date Grant Date Number Exercise Intrinsic Number Fair Value Number Fair Value of Options Price Value of Shares Per Share of Shares Per Share (in millions) Outstanding at January 1, 2021 5,611,777 $ 98.28 $ 613.4 390,054 $ 131.63 145,609 $ 170.75 Granted 750,822 $ 189.29 162,378 $ 189.23 59,144 $ 210.07 Dividend reinvestment — $ — — $ — 980 N/A Exercised or lapsed (1,146,422 ) $ 73.30 $ 147.6 (173,726 ) $ 120.94 (42,610 ) $ 140.70 Canceled, expired or forfeited (149,079 ) $ 155.40 (27,202 ) $ 157.79 — $ — Outstanding at December 31, 2021 5,067,098 $ 115.73 $ 572.6 351,504 $ 161.33 163,123 $ 192.99 Granted 653,802 $ 196.64 201,617 $ 193.33 111,333 $ 168.63 Dividend reinvestment — $ — — $ — 1,371 N/A Exercised or lapsed (1,435,673 ) $ 92.38 $ 129.1 (205,407 ) $ 157.22 (54,927 ) $ 174.42 Canceled, expired or forfeited (261,411 ) $ 181.48 (40,139 ) $ 182.35 (21,406 ) $ 202.55 Outstanding at December 31, 2022 4,023,816 $ 132.90 $ 193.3 307,575 $ 182.07 199,494 $ 195.34 Granted 211,945 $ 185.29 194,236 $ 185.22 48,486 $ 212.86 Dividend reinvestment — $ — — $ — 1,142 N/A Exercised or lapsed (1,295,815 ) $ 108.85 $ 118.1 (178,602 ) $ 179.39 (45,997 ) $ 192.93 Canceled, expired or forfeited (227,436 ) $ 187.56 (32,170 ) $ 183.25 (21,889 ) $ 207.27 Outstanding at December 31, 2023 2,712,510 $ 143.91 $ 257.6 291,039 $ 186.28 181,236 $ 199.62 Exercisable at December 31, 2023 1,947,253 $ 127.43 $ 217.0 Exercisable at December 31, 2022 2,702,075 $ 110.02 $ 182.6 Nonvested at December 31, 2023 765,257 291,039 181,236 Expected to vest at December 31, 2023 643,367 252,146 223,629 (1) _______________ ( 1 Includes estimated performance achievement The fair value of our stock options granted was estimated on the date of grant using a Black-Scholes option valuation model that uses the weighted-average assumptions noted in the following table during the years ended December 31: 2023 2022 2021 Expected volatility 27.28 % 25.33 % 23.66 % Risk-free interest rate 3.77 % 1.55 % 0.39 % Expected term in years 4.0 4.2 4.3 Dividend yield 0.66 % 0.60 % 0.63 % Weighted average grant date fair value per stock option $ 48.14 $ 42.25 $ 35.15 A summary of the status of our nonvested options and changes are presented below: Number of Options Weighted Average Grant-Date Fair Value Per Share Nonvested balance at January 1, 2021 2,117,613 $ 23.39 Granted 750,822 $ 35.15 Vested (825,850 ) $ 21.62 Cancelled or expired (149,079 ) $ 27.54 Nonvested balance at December 31, 2021 1,893,506 $ 28.49 Granted 653,802 $ 42.25 Vested (964,156 ) $ 22.97 Cancelled or expired (261,411 ) $ 35.23 Nonvested balance at December 31, 2022 1,321,741 $ 34.65 Granted 211,945 $ 52.69 Vested (540,993 ) $ 33.08 Cancelled or expired (227,436 ) $ 38.03 Nonvested balance at December 31, 2023 765,257 $ 39.74 Intrinsic value for stock options is calculated based on the exercise price of the underlying awards and the quoted price of our common stock as of the reporting date. Excess tax benefits of $20.6 million, $26.5 million, and $35.9 million from exercised stock options were recorded as income tax benefit in our accompanying consolidated statements of operations for the years ended December 31, 2023, 2022, 2021 , respectively. Stock-based compensation expense for the years ended December 31, 2023, 2022, 2021 was $54.0 million, $56.5 million, and $55.7 million, respectively. As of December 31, 2023, December 31, 2022 As of December 31, 2023 , there was $76.2 million of total unrecognized compensation cost, exclusive of the impact of vesting upon retirement eligibility, related to nonvested share-based compensation arrangements granted under our 2021 2013 Our U.K. Sharesave Plan offers qualifying employees in the United Kingdom the opportunity to own shares of our common stock. Employees who elect to participate are granted stock options, of which the exercise price is equal to the average of the closing price on the five three December 31, 2023, 2022, 2021 , we granted 5,144, 9,370 and 11,254 stock options under the U.K. Sharesave Plan at a discounted exercise price of $227.65, $178.26, and $166.16, respectively. As of December 31, 2023 , there were 441,528 shares of common stock reserved and available for future issuance under our U.K. Sharesave Plan. We also offer eligible employees the opportunity to participate in an ESPP. Under our ESPP, participating employees may may not 718, may no December 31, 2023, 2022, 2021 , we issued 18,636, 30,398, and 33,974 shares of common stock at a weighted average discounted price of $209.68, $174.66, and $181.77, respectively. As of December 31, 2023 , there were 1,177,258 shares of common stock reserved and available for future issuance under our ESPP.

Note 18 - Pension and Postretir

Note 18 - Pension and Postretirement Benefits	12 Months Ended
Note 18 - Pension and Postretirement Benefits	Dec. 31, 2023
Notes to Financial Statements
Retirement Benefits [Text Block]	18. We have a frozen qualified defined benefit pension plan for certain of our employees through membership in the Pension Plan for Insurance Organizations (the “Pension Plan”), a multiple-employer trust. Prior to the freeze, we applied a cash balance formula to determine future benefits. Under the cash balance formula, each participant has an account, which was credited annually based on salary rates determined by years of service, as well as the interest earned on the previous year-end cash balance. We also have a non-qualified frozen supplemental cash balance plan (“SERP”) for certain employees. Our SERP is funded from our general assets. W e contributed $1.7 million to our SERP in 2023 and $0.8 million in 2022 , respectively, and expect to contribute $1.0 million in 2024. Our Pension Plan’s funding policy is to contribute annually at an amount between the minimum funding requirements set forth in the Employee Retirement Income Security Act of 1974 No d for 2023 and 2022, We also provide certain healthcare and life insurance benefits for both active and retired employees. The Postretirement Health and Life Insurance Plan (the “Postretirement Plan”), which has been frozen, is contributory, requiring participants to pay a stated percentage of the premium for coverage. We do not 2024. The following table sets forth the changes in the benefit obligations and the plan assets, the funded status of the Pension Plan, SERP, and Postretirement Plan, and the amounts recognized in our consolidated balance sheets at December 31: Pension Plan and SERP Postretirement Plan 2023 2022 2023 2022 Change in benefit obligation: Benefit obligation at January 1 $ 330.9 $ 431.7 $ 4.2 $ 6.0 Interest cost 17.1 14.7 0.2 0.1 Actuarial (gain) loss (0.8 ) (86.6 ) 1.1 (0.4 ) Plan participants’ contributions — — 1.3 1.3 Benefits paid (29.4 ) (28.9 ) (2.7 ) (2.8 ) Benefit obligation at December 31 $ 317.8 $ 330.9 $ 4.1 $ 4.2 Accumulated benefit obligation at December 31 $ 317.8 $ 330.9 Change in plan assets: Fair value of plan assets at January 1 $ 406.3 $ 546.2 $ 7.6 $ 9.5 Actuarial gain (loss) 47.3 (111.8 ) 0.4 (1.1 ) Employer contributions, net 1.7 0.8 1.5 0.7 Plan participants’ contributions — — 1.3 1.3 Benefits paid (29.4 ) (28.9 ) (2.7 ) (2.8 ) Fair value of plan assets at December 31 $ 425.9 $ 406.3 $ 8.1 $ 7.6 Funded status at December 31 $ (108.1 ) $ (75.4 ) $ (4.0 ) $ (3.4 ) Amounts recognized in the consolidated balance sheets consist of: Pension assets, noncurrent (1) $ (117.4 ) $ (85.6 ) $ (4.0 ) $ (3.4 ) Pension, SERP and postretirement benefits, current (2) 1.0 0.8 — — Pension, SERP and postretirement benefits, noncurrent (3) 8.3 9.4 — — Total Pension, SERP and Postretirement benefits $ (108.1 ) $ (75.4 ) $ (4.0 ) $ (3.4 ) _______________ ( 1 ( 2 Included in "Accounts payable and accrued liabilities" in our accompanying consolidated balance sheets ( 3 Included in "Other noncurrent liabilities" in our accompanying consolidated balance sheets The pre-tax components included within accumulated other comprehensive losses as of December 31 Pension Plan and SERP Postretirement Plan 2023 2022 2023 2022 Prior service benefit cost $ 2.4 $ 2.6 $ — $ — Actuarial losses 118.3 147.8 3.6 3.2 Accumulated other comprehensive losses, pretax $ 120.7 $ 150.4 $ 3.6 $ 3.2 The pre-tax components of net periodic benefit (credit) cost and the amounts recognized in other comprehensive income are summarized below for the years ended December 31: Pension Plan and SERP Postretirement Plan 2023 2022 2021 2023 2022 2021 Interest cost $ 17.1 $ 14.7 $ 11.0 $ 0.2 $ 0.1 $ 0.1 Expected return on plan assets (24.1 ) (28.2 ) (32.8 ) (0.1 ) (0.2 ) (0.2 ) Amortization of prior service cost (credit) reclassified from accumulated other comprehensive income 0.2 0.2 0.2 — — (0.1 ) Amortization of net actuarial loss reclassified from accumulated other comprehensive income 5.2 4.0 3.8 0.4 0.2 0.2 Net periodic (credit) benefit cost (1.6 ) (9.3 ) (17.8 ) 0.5 0.1 — Less: Amortization of prior service (cost) credit reclassified from accumulated other comprehensive income (0.2 ) (0.2 ) (0.2 ) — — 0.1 Less: Amortization of actuarial loss reclassified from accumulated other comprehensive losses (0.1 ) (0.2 ) (0.2 ) — — — Less: Net loss recognized reclassified from accumulated other comprehensive losses (5.1 ) (3.8 ) (3.6 ) (0.4 ) (0.2 ) (0.2 ) Actuarial (gain) loss (24.3 ) 53.5 (31.1 ) 0.8 1.0 (0.5 ) Total recognized in other comprehensive income (29.7 ) 49.3 (35.1 ) 0.4 0.8 (0.6 ) Total recognized in net periodic benefit credit and other comprehensive (income) loss $ (31.3 ) $ 40.0 $ (52.9 ) $ 0.9 $ 0.9 $ (0.6 ) The weighted-average assumptions used to determine benefit obligations as of December 31, 2023 2022 2023 2022 2021 Pension Plan and SERP Postretirement Plan Weighted-average assumptions used to determine benefit obligations: 2023 2022 2023 2022 Discount rate 5.37 % 5.49 % 4.75 % 5.25 % Expected return on plan assets 6.50 % 6.25 % 1.75 % 1.75 % Cash balance interest credit rate 4.43 % 2.57 % N/A Weighted-average assumptions used to determine net periodic benefit (credit) cost: 2023 2022 2021 2023 2022 2021 Discount rate 5.48 % 2.75 % 2.49 % 5.25 % 2.25 % 1.50 % Expected return on plan assets 6.25 % 6.25 % 6.50 % 1.75 % 1.75 % 2.00 % Cash balance interest credit rate 4.43 % 2.57 % 2.57 % N/A The following table presents the estimated future benefit payments for the respective plans. The future benefit payments for the Postretirement Plan are net of the federal Medicare subsidy. Pension Plan Postretirement and SERP Plan Gross Gross Medicare Net Benefit Benefit Subsidy Benefit Amount Amount Payments Amount 2024 $ 29.4 $ 0.8 $ (0.1 ) $ 0.7 2025 $ 28.9 $ 0.7 $ — $ 0.7 2026 $ 28.4 $ 0.6 $ — $ 0.6 2027 $ 28.4 $ 0.5 $ — $ 0.5 2028 $ 27.0 $ 0.4 $ — $ 0.4 2029 and thereafter $ 123.3 $ 1.4 $ — $ 1.4 The healthcare cost trend rate for 2023 2037. The subsidy benefit from the Medicare Prescription Drug, Improvement and Modernization Act of 2003 December 31, 2023 2022, 2023 , 2022 and 2021, The expected return on our Pension Plan assets as of December 31, 2023 2022 was 6.25%, which was determined by taking into consideration our analysis of our actual historical investment returns to a broader long-term forecast after adjusting for the target investment allocation and reflecting the current economic environment. During the first 2023, December 31, 2022. The asset allocation at December 31, 2023 2022 Target Percentage of Plan Assets Asset Category Allocation 2023 2022 Equity securities 40.0 % 40.0 % 41.4 % Debt securities 60.0 53.5 52.9 Real Estate — 5.3 5.0 Other — 1.2 0.7 Total 100.0 % 100.0 % 100.0 % We have used the target investment allocation to derive the expected return as we believe this allocation will be retained on an ongoing basis that will be commensurate with the projected cash flows of the plan. The expected return for each investment category within the target investment allocation is developed using average historical rates of return for each targeted investment category, considering the projected cash flow of our Pension Plan. The difference between this expected return and the actual return on plan assets is generally deferred and recognized over subsequent periods through future net periodic benefit costs. We believe that the use of the average historical rates of returns is consistent with the timing and amounts of expected contributions to the plans and benefit payments to plan participants. These considerations provide the basis for reasonable assumptions with respect to the expected long-term rate of return on plan assets. We also maintain a voluntary employees beneficiary association plan (the “VEBA Plan”) under Section 501 9 December 31, 2023 2022 There were no 1, 2, 3 December 31, 2023 2022 Note 7 Quoted Prices Significant in Active Other Markets for Observable Identical Assets Inputs Total (Level 1) (Level 2) December 31, 2023 Equity Managed equity accounts (1) $ 131.6 $ 131.6 $ — Equity — pooled separate account (2) 38.6 — 38.6 Debt Fixed income manager — separately managed account (5) 138.9 — 138.9 Fixed income manager — pooled separate account (2) 89.2 — 89.2 Fixed income manager — government securities (3) 8.1 8.1 — Others Cash — pooled separate account (2) 5.2 — 5.2 Global real estate account (4) 22.4 — 22.4 Total $ 434.0 $ 139.7 $ 294.3 December 31, 2022 Equity Managed equity accounts (1) $ 128.8 $ 128.8 $ — Equity — pooled separate account (2) 39.7 — 39.7 Debt Fixed income manager — separately managed account (5) 133.6 — 133.6 Fixed income manager — pooled separate account (2) 81.5 — 81.5 Fixed income manager — government securities (3) 7.7 7.7 — Others Cash — pooled separate account (2) 2.7 — 2.7 Global real estate account (4) 20.2 — 20.2 Total $ 414.2 $ 136.5 $ 277.7 _______________ ( 1 Valued at the closing price of shares for domestic stocks within the managed equity accounts, and valued at the net asset value (“NAV”) of shares for mutual funds at either the closing price reported in the active market or based on yields currently available on comparable securities of issuers with similar credit ratings for corporate bonds held by the Pension Plan in these managed accounts. ( 2 The pooled separate accounts invest in domestic and foreign stocks, bonds and mutual funds. The fair values of these stocks, bonds and mutual funds are publicly quoted and are used in determining the NAV of the pooled separate account, which is not ( 3 The fund invested in the U.S. government, its agencies or instrumentalities or securities that are rated AAA by S&P, AAA by Fitch, or Aaa by Moody’s, including but not ( 4 The funds invested in common stocks and other equity securities issued by domestic and foreign real estate companies, including real estate investment trusts ("REIT") and similar REIT-like entities. The fair values of these stocks, bonds and mutual funds are publicly quoted and are used in determining the NAV of the funds, which is not ( 5 The separately managed accounts invest in U.S. Treasury Bonds and U.S. Treasury Separate Trading of Registered Interest and Principal of Securities (“UST STRIPS”). The fair values of these bonds and UST STRIPS are publicly quoted and are used in determining the NAV of the separately managed account, which is not

Note 19 - Segment Reporting

Note 19 - Segment Reporting	12 Months Ended
Note 19 - Segment Reporting	Dec. 31, 2023
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	19. ASC 280 10, Disclosures About Segments of an Enterprise and Related Information 280 10” 280 10 280 10. Each of our reportable segments, Insurance, Energy and Specialized Markets, and Financial Services has a portion of its revenue from more than one three Note 2 Insurance: Energy and Specialized Markets: first 2022 , 3E February 1, 2023, Note 11. Financial Services: April 8, 2022, Note 11. As of February 1, 2023, one one third not not not 6. The following table provides our revenue and EBITDA by reportable segment for the years ended December 31, 2023 2022 2021 Insurance Total Insurance Energy and Specialized Markets Financial Services Total Insurance Energy and Specialized Markets Financial Services Total Revenues $ 2,681.4 $ 2,681.4 $ 2,437.0 $ 22.4 $ 37.6 $ 2,497.0 $ 2,206.9 $ 112.8 $ 142.8 $ 2,462.5 Expenses: Cost of revenues (exclusive of items shown separately below) (876.5 ) (876.5 ) (781.9 ) (19.1 ) (23.6 ) (824.6 ) (704.4 ) (58.9 ) (90.4 ) (853.7 ) Selling, general and administrative (391.8 ) (391.8 ) (347.4 ) (26.7 ) (7.4 ) (381.5 ) (239.1 ) (44.9 ) (29.2 ) (313.2 ) Other operating gain (loss) - - - 450.0 (95.8 ) 354.2 - - (134.0 ) (134.0 ) Investment income (loss) 11.0 11.0 (4.7 ) (0.4 ) (0.2 ) (5.3 ) 1.8 0.6 (0.3 ) 2.1 EBITDA from discontinued operations of the Energy business - - - (117.9 ) - (117.9 ) - 222.3 - 222.3 EBITDA $ 1,424.1 $ 1,424.1 $ 1,303.0 $ 308.3 $ (89.4 ) $ 1,521.9 $ 1,265.2 $ 231.9 $ (111.1 ) $ 1,386.0 EBITDA from discontinued operations of the Energy business - 117.9 (222.3 ) Depreciation and amortization of fixed assets (206.8 ) (164.2 ) (170.3 ) Amortization of intangible assets (74.6 ) (74.4 ) (79.9 ) Interest expense (115.5 ) (138.8 ) (127.0 ) Income before income taxes $ 1,027.2 $ 1,262.4 $ 786.5 Long-lived assets by country are provided below as of December 31: 2023 2022 Long-lived assets: U.S. $ 2,455.7 $ 2,876.5 U.K. 597.9 2,428.9 Other countries 502.4 730.6 Total long-lived assets $ 3,556.0 $ 6,036.0

Note 20 - Related Parties

Note 20 - Related Parties	12 Months Ended
Note 20 - Related Parties	Dec. 31, 2023
Notes to Financial Statements
Related Party Transactions Disclosure [Text Block]	20. We consider our stockholders that own more than 5% 850, Related Party Disclosures 5% December 31, 2023 2022. Jeffrey Dailey, one December 31, 2022 June 30, 2023, 2% 2023 2022. Therese M. Vaughan, one January 31, 2024. 1% 2023 2022. Lee M. Shavel, our President and CEO and one no

Note 21 - Commitments and Conti

Note 21 - Commitments and Contingencies	12 Months Ended
Note 21 - Commitments and Contingencies	Dec. 31, 2023
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	21. Commercial Litigation On February 12, 2024, No. N24C 02 130 April 3, 2024. not ERISA Litigation On September 24, 2020, No. 2:20 13223 401 September 24, 2014 not January 12, 2021, April 13, 2021. May 5, 2023. October 4, 2023. January 12, 2024, Financial Services Government Inquiry We continue to cooperate with a civil inquiry by the Department of Justice ("DOJ") related to government contracts within our former Financial Services segment, which was sold to TransUnion in April 2022. no In March 2022, November 28, 2023 not Data Privacy Litigation On or about February 8, 2023, Atlas Data Privacy Corp., et al. v. Verisk Analytics, Inc., et al. No. 000903 24, not 19,640 not On January 30, 2023, No.: 8:23 00186. April 13, 2023. not February 7, 2024. February 22, 2024. not On June 27, 2022, No. 3:22 03789. 631 scrappyrent2own.com 17200 January 27, 2023. February 28, 2023. April 13, 2023. August 18, 2023 September 20, 2023. September 20, 2023. December 18, 2023. January 30, 2024. February 9, 2024. not On December 15, 2021, No. 2:21 6911. April 22, 2022. March 30, 2023 February 16, 2024. not

Note 22 - Subsequent Events

Note 22 - Subsequent Events	12 Months Ended
Note 22 - Subsequent Events	Dec. 31, 2023
Notes to Financial Statements
Subsequent Events [Text Block]	22. On January 9, 2024, 2022, On February 14, 2024, March 29, 2024, March 15, 2024.

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts and Reserves	12 Months Ended
	Dec. 31, 2023
Notes to Financial Statements
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]	Supplementary Financial Information (Unaudited) Valuation and Qualifying Accounts and Reserves For the Years Ended December 31, 2023, 2022, 2021 (In millions) Balance at Charged to Beginning Costs and Deductions— Balance at Description of Year Expenses (1) Write-offs (2) End of Year Year ended December 31, 2023 Allowance for doubtful accounts $ 14.3 $ 8.7 $ (7.9 ) $ 15.1 Valuation allowance for income taxes $ 45.3 $ 1.2 $ (40.9 ) $ 5.6 Year ended December 31, 2022 Allowance for doubtful accounts $ 15.4 $ 6.4 $ (7.5 ) $ 14.3 Valuation allowance for income taxes $ 38.3 $ 41.2 $ (34.2 ) $ 45.3 Year ended December 31, 2021 Allowance for doubtful accounts $ 14.1 $ 13.8 $ (12.5 ) $ 15.4 Valuation allowance for income taxes $ 30.6 $ 8.1 $ (0.4 ) $ 38.3 ( 1 Primarily additional reserves for bad debts ( 2 Primarily accounts receivable balances written off, net of recoveries, the expiration of loss carryforwards, and businesses held for sale

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
Significant Accounting Policies (Policies)	Dec. 31, 2023
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Our accompanying consolidated financial statements have been prepared on the basis of accounting principles generally accepted in the United States of America (“U.S. GAAP”). The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Significant estimates include acquisition purchase price allocations, the fair value of goodwill, the realization of deferred tax assets and liabilities, acquisition-related liabilities, fair value of stock-based compensation for equity awards granted, and assets and liabilities for pension and postretirement benefits. Actual results may On February 1, 2023, 205 20, Discontinued Operations 205 20” 205 20.
Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block]	(a) Intercompany Accounts and Transactions The consolidated financial statements include all of our accounts. All intercompany accounts and transactions have been eliminated.
Revenue from Contract with Customer [Policy Text Block]	(b) Revenue Recognition The following describes our primary types of revenues and the applicable revenue recognition policies. We recognize revenues through recurring and non-recurring long-term agreements (generally one five Hosted Subscriptions We offer two first not no not 606, Revenue from Contracts with Customers 606" The second may no not 606. Subscriptions are generally paid in advance of rendering services either quarterly or annually upon commencement of the subscription period. Advisory/Consulting Services We provide certain discrete project based advisory/consulting services, which are recognized over time by measuring the progress toward complete satisfaction of the performance obligation, based on the input method of consulting hours worked; this aligns with the results achieved and value transferred to our customer. The hours consumed are most reflective of the measure of progress towards satisfying the performance obligation, as the resources hours worked directly tie to the progress of the services to be provided. In general, they are billed over the course of the project. Transactional Solutions Certain solutions are also paid for by customers on a transactional basis. We recognize these revenues as the solutions are delivered or services performed at a point in time. In general, our customers are billed monthly at the end of each month. (c) Deferred Revenues We invoice our customers in annual, quarterly, monthly, or milestone installments. Amounts billed and/or collected in advance of services being provided are recorded as “Deferred revenues” and “Other noncurrent liabilities” in our accompanying consolidated balance sheets and are recognized as the services are performed, control is transferred to customers, and the applicable revenue recognition criteria is met. (d) Accounts Receivable and Allowance for Doubtful Accounts Accounts receivable are generally recorded at the invoiced amount. Unbilled receivables are short-term in nature and expected to be billed within one (e) Deferred Commissions We recognize an asset for the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one five December 31, 2023
Property, Plant and Equipment, Policy [Policy Text Block]	(f) Fixed Assets and Finite-lived Intangible Assets Fixed assets and finite-lived intangibles are stated at cost less accumulated depreciation and amortization, which are computed on a straight-line basis over their estimated useful lives. Leasehold improvements are amortized over the shorter of the useful life of the asset or the lease term. Our internal software development costs primarily relate to internal-use software. Such costs are capitalized in the application development stage in accordance with ASC 350 40, Internal-use Software 350 40" 985 20, Software to be Sold, Leased, or Marketed 985 20” In accordance with ASC 360, Property, Plant & Equipment may not first first 2022, 2021,
Lessee, Leases [Policy Text Block]	(g) Leases We have operating and finance leases for corporate offices, data centers, and certain equipment that are accounted for under ASC 842, Leases 2033 We determine if an arrangement is a lease at inception. We consider any contract where there is an identified asset and that it has the right to control the use of such asset in determining whether the contract contains a lease. A right-of-use ("ROU") asset represents our right to use an underlying asset for the lease term and the lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and lease liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. As our operating leases do not zero
Fair Value of Financial Instruments, Policy [Policy Text Block]	(h) Fair Value of Financial and Non-financial Instruments We follow the provisions of ASC 820 10, Fair Value Measurements 820 10” 820 10 820 10
Foreign Currency Transactions and Translations Policy [Policy Text Block]	(i) Foreign Currency We have determined local currencies are the functional currencies of our foreign operations. The assets and liabilities of foreign subsidiaries are translated at the period-end rate of exchange and statement of operations items are translated at the average rates prevailing during the year. The resulting translation adjustment is recorded as a component of “Accumulated other comprehensive losses” in our accompanying consolidated statements of changes in stockholders’ equity.
Compensation Related Costs, Policy [Policy Text Block]	(j) Stock-Based Compensation We follow ASC 718, Stock Compensation 718” 718, Our nonqualified stock options have an exercise price equal to the closing price of our common stock on the grant date, with a ten no zero The fair value of our restricted stock is determined using the closing price of our common stock on the grant date. Our restricted stock is not four Performance share units (“PSU”) vest at the end of a three one third zero 500 We estimate expected forfeitures of equity awards at the date of grant and recognize compensation expense only for those awards expected to vest. The forfeiture assumption is ultimately adjusted to the actual forfeiture rate. Estimated forfeiture is ultimately adjusted to actual forfeiture. Changes in the forfeiture assumptions may Excess tax benefit from exercised stock options, lapsing of restricted stock and PSUs is recorded as an income tax benefit in our accompanying consolidated statements of operations. This tax benefit is calculated as the excess of the intrinsic value of options exercised and of the market value of restricted stock lapsed over the compensation recognized for financial reporting purposes.
Research, Development, and Computer Software, Policy [Policy Text Block]	(k) Research and Development Costs Research and development costs, which are primarily related to personnel and related overhead costs incurred in developing new services for customers, are expensed as incurred. Such cost s were $36.8 million, $43.1 million, and $47.1 m December 31, 2023, 2022, 2021,
Advertising Cost [Policy Text Block]	(l) Advertising Costs Advertising costs, which are primarily associated with promoting our brand, names and solutions provided, are expensed as incurred. Such costs were $11.9 million, $14.7 million, and $12.0 million for the years ended December 31, 2023, 2022, 2021,
Income Tax, Policy [Policy Text Block]	(m) Income Taxes We account for income taxes under the asset and liability method under ASC 740, Income Taxes 740” Deferred tax assets are recorded to the extent these assets are more likely than not not not We follow ASC 740 10, Income Taxes 740 10” , 740 10 may not not 740 10. We recognize interest and penalties related to unrecognized tax benefits within the income tax expense line in our accompanying consolidated statements of operations. Accrued interest and penalties are included within “Other liabilities” on our accompanying consolidated balance sheets.
Earnings Per Share, Policy [Policy Text Block]	(n) Earnings Per Share Basic and diluted earnings per share (“EPS”) are determined in accordance with ASC 260, Earnings per Share
Pension and Other Postretirement Plans, Policy [Policy Text Block]	(o) Pension and Postretirement Benefits We account for our pension and postretirement benefits under ASC 715, Compensation — Retirement Benefits 715” 715 not December 31.
Standard Product Warranty, Policy [Policy Text Block]	(p) Product Warranty Obligations We provide warranty coverage for certain of our solutions. We recognize a product warranty obligation when claims are probable and can be reasonably estimated. As of December 31, 2023 2022 not
Commitments and Contingencies, Policy [Policy Text Block]	(q) Loss Contingencies We accrue for costs relating to litigation, claims, and other contingent matters when such liabilities become probable and reasonably estimable. Such estimates are based on management’s judgment. Actual amounts paid may In the ordinary course of business, we enter into numerous agreements that contain standard indemnities whereby we indemnify another party for breaches of confidentiality, infringement of intellectual property or gross negligence. Such indemnifications are primarily granted under licensing of computer software. Most agreements contain provisions to limit the maximum potential amount of future payments that we could be required to make under these indemnifications; however, we are not not
Goodwill and Intangible Assets, Policy [Policy Text Block]	(r) Goodwill and Indefinite-Lived Intangible Assets Goodwill represents the excess of acquisition costs over the fair value of tangible net assets and identifiable intangible assets of our businesses acquired. Goodwill and intangible assets deemed to have indefinite lives are not June 30, may not may first not not not
New Accounting Pronouncements, Policy [Policy Text Block]	(s) Recent Accounting Pronouncements Accounting Standard Description Effective Date Effect on Consolidated Financial Statements or Other Significant Matters Leases (Topic 842 March 2023, No. 2023 01, No. 2023 01" This update amends the accounting for leasehold improvements in common-control arrangements for all entities. The amendment requires a lessee in a common-control lease arrangement to amortize leasehold improvements that it owns over the improvements’ useful life to the common control group, regardless of the lease term, if the lessee continues to control the use of the underlying asset through a lease. ASU No. 2023 01 December 15, 2023, The adoption of this guidance is not Segment Reporting (Topic 280 November 2023, No. 2023 07, No. 2023 07" This updates changes the reportable segment disclosure requirements requiring enhanced disclosures about significant segment expenses. Public entities are required to disclose significant segment expenses that are regularly provided to the chief operating decision maker and to disclose how reported measures of segment profit or loss are used in assessing segment performance and allocating resources. ASU No. 2023 07 December 15, 2023, December 15, 2024. The adoption of this guidance is not Income Taxes (Topic 740 December 2023, No. 2023 09, No. 2023 09 The amendments in within ASU No. 2023 09 The ASU’s amendments are effective for public business entities for fiscal years beginning after December 15, 2024. The adoption of this guidance is not

Note 4 - Accounts Receivable (T

Note 4 - Accounts Receivable (Tables)	12 Months Ended
Note 4 - Accounts Receivable (Tables)	Dec. 31, 2023
Notes Tables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	2023 2022 Billed receivables $ 317.1 $ 273.7 Unbilled receivables 32.2 30.7 Total receivables 349.3 304.4 Less allowance for doubtful accounts (15.1 ) (14.3 ) Accounts receivable, net $ 334.2 $ 290.1

Note 6 - Revenues (Tables)

Note 6 - Revenues (Tables)	12 Months Ended
Note 6 - Revenues (Tables)	Dec. 31, 2023
Notes Tables
Disaggregation of Revenue [Table Text Block]	2023 2022 2021 Insurance: Underwriting $ 1,892.7 $ 1,734.5 $ 1,555.1 Claims 788.7 702.5 651.8 Total Insurance 2,681.4 2,437.0 2,206.9 Specialized Markets — 22.4 112.8 Financial Services — 37.6 142.8 Total revenues $ 2,681.4 $ 2,497.0 $ 2,462.5 2023 2022 2021 Revenues: United States $ 2,238.3 $ 2,120.1 $ 2,057.7 United Kingdom 190.1 169.5 169.0 Other countries 253.0 207.4 235.8 Total revenues $ 2,681.4 $ 2,497.0 $ 2,462.5
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]	Contract Liabilities at December 31, 2021 $ 349.3 Revenue (2,497.0 ) Acquisitions 3.4 Dispositions (61.0 ) Billings 2,527.0 Contract Liabilities at December 31, 2022 321.7 Revenue (2,681.4 ) Foreign currency translation adjustment (3.0 ) Billings 2,737.8 Contract Liabilities at December 31, 2023 $ 375.1

Note 7 - Investments and Fair_2

Note 7 - Investments and Fair Value Measurements (Tables)	12 Months Ended
Note 7 - Investments and Fair Value Measurements (Tables)	Dec. 31, 2023
Notes Tables
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]	2023 2022 Fair Value Carrying Estimated Carrying Estimated Hierarchy Value Fair Value Value Fair Value Financial instrument not carried at fair value: Senior Notes (Note 15) Level 2 $ 2,833.7 $ 2,735.3 $ 2,342.6 $ 2,113.3

Note 8 - Leases (Tables)

Note 8 - Leases (Tables)	12 Months Ended
Note 8 - Leases (Tables)	Dec. 31, 2023
Notes Tables
Lease, Cost [Table Text Block]	2023 2022 Lease cost: Operating lease cost (1) $ 33.9 $ 47.7 Sublease income (1.7 ) (2.0 ) Finance lease cost Depreciation of finance lease assets (2) 14.4 12.8 Interest on finance lease liabilities (3) 1.0 0.5 Total lease cost $ 47.6 $ 59.0 Other information: Cash paid for amounts included in the measurement of lease liabilities Operating cash outflows from operating leases $ (34.9 ) $ (46.4 ) Operating cash outflows from finance leases $ (1.0 ) $ (0.5 ) Financing cash outflows from finance leases $ (15.7 ) $ (14.3 )
Schedule of Weighted Average Number of Shares [Table Text Block]	2023 2022 Weighted-average remaining lease term - operating leases (in years) 8.2 8.5 Weighted-average remaining lease term - finance leases (in years) 3.1 1.7 Weighted-average discount rate - operating leases 4.0 % 3.8 % Weighted-average discount rate - finance leases 4.2 % 2.6 %
Lessee, Lease Liability Maturity [Table Text Block]	Years Ending Operating Leases Finance Leases 2024 $ 33.3 $ 15.6 2025 34.1 13.8 2026 32.6 3.4 2027 32.4 2.6 2028 31.7 1.7 2029 and thereafter 104.3 - Total lease payments 268.4 37.1 Less: Amount representing interest (39.7 ) (2.6 ) Present value of total lease payments $ 228.7 $ 34.5

Note 9 - Fixed Assets (Tables)

Note 9 - Fixed Assets (Tables)	12 Months Ended
Note 9 - Fixed Assets (Tables)	Dec. 31, 2023
Notes Tables
Property, Plant and Equipment [Table Text Block]	Useful Life (in years) Cost Accumulated Depreciation and Amortization Net December 31, 2023 Furniture and office equipment 3 - 10 $ 178.5 $ (156.7 ) $ 21.8 Leasehold improvements Lease term 116.5 (63.0 ) 53.5 Purchased software 3 59.9 (55.2 ) 4.7 Software development costs 3 - 7 1,136.6 (653.0 ) 483.6 Leased equipment 3 - 4 105.1 (63.8 ) 41.3 Total fixed assets $ 1,596.6 $ (991.7 ) $ 604.9 December 31, 2022 Furniture and office equipment 3 - 10 $ 199.2 $ (177.1 ) $ 22.1 Leasehold improvements Lease term 118.3 (54.6 ) 63.7 Purchased software 3 65.1 (61.0 ) 4.1 Software development costs 3 - 7 945.4 (504.5 ) 440.9 Leased equipment 3 - 4 64.4 (53.7 ) 10.7 Total fixed assets $ 1,392.4 $ (850.9 ) $ 541.5

Note 10 - Acquisitions (Tables)

Note 10 - Acquisitions (Tables)	12 Months Ended
Note 10 - Acquisitions (Tables)	Dec. 31, 2023
Notes Tables
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	Krug Other Total Cash and cash equivalents $ 7.0 $ 1.0 $ 8.0 Accounts receivable 1.8 0.8 2.6 Other current assets 3.8 0.1 3.9 Fixed assets 0.2 0.1 0.3 Operating lease right-of-use assets, net — 0.2 0.2 Intangible assets 15.1 18.4 33.5 Goodwill 33.1 22.8 55.9 Total assets acquired 61.0 43.4 104.4 Accounts payable and accrued liabilities 5.8 2.1 7.9 Operating lease liabilities — 0.1 0.1 Deferred income tax, net 4.8 3.9 8.7 Other noncurrent liabilities 0.1 1.4 1.5 Total liabilities assumed 10.7 7.5 18.2 Net assets acquired 50.3 35.9 86.2 Less: cash acquired 7.0 1.0 8.0 Net cash purchase price $ 43.3 $ 34.9 $ 78.2 Opta Infutor Others Total Cash and cash equivalents $ 0.4 $ 17.0 $ - $ 17.4 Accounts receivable 5.2 10.7 - 15.9 Other current assets 1.3 3.8 0.1 5.2 Fixed assets 1.5 0.9 0.3 2.7 Operating lease right-of-use assets, net 1.1 2.3 - 3.4 Intangible assets 87.0 83.4 2.3 172.7 Goodwill 141.1 140.3 3.0 284.4 Other assets - 0.1 - 0.1 Total assets acquired 237.6 258.5 5.7 501.8 Current liabilities 4.9 14.4 0.1 19.4 Deferred revenues 0.2 3.1 0.1 3.4 Operating lease liabilities 1.1 3.3 - 4.4 Deferred income tax, net 13.5 - 0.5 14.0 Other liabilities - - 0.2 0.2 Total liabilities assumed 19.7 20.8 0.9 41.4 Net assets acquired 217.9 237.7 4.8 460.4 Less: Cash acquired 0.4 17.0 - 17.4 Net cash purchase price $ 217.5 $ 220.7 $ 4.8 $ 443.0 ACTINEO Data Driven Safety Others Total Cash and cash equivalents $ 0.2 $ 2.5 $ 3.7 $ 6.4 Accounts receivable 1.8 1.0 1.4 4.2 Other current assets — 2.0 1.0 3.0 Fixed assets 1.4 — 0.1 1.5 Operating lease right-of-use assets, net 4.2 0.4 1.3 5.9 Intangible assets 48.3 42.1 19.0 109.4 Goodwill 121.9 74.1 39.6 235.6 Other assets — — 0.1 0.1 Total assets acquired 177.8 122.1 66.2 366.1 Current liabilities 2.1 2.7 1.7 6.5 Deferred revenues — 0.4 1.4 1.8 Operating lease liabilities 4.2 0.4 1.4 6.0 Deferred income tax, net 15.8 — 3.7 19.5 Other liabilities — 21.7 — 21.7 Total liabilities assumed 22.1 25.2 8.2 55.5 Net assets acquired 155.7 96.9 58.0 310.6 Less: Noncontrolling interests 6.6 — 19.8 26.4 Cash acquired 0.2 3.4 3.7 7.3 Net cash purchase price $ 148.9 $ 93.5 $ 34.5 $ 276.9
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	Weighted Average Useful Life (in years) Total Technology-based 5 $ 9.9 Marketing-related 2 0.5 Customer-related 13 23.1 Total intangible assets $ 33.5 Weighted Average Useful Life (in years) Total Technology-based 6 $ 48.5 Marketing-related 4 2.0 Customer-related 13 122.2 Total intangible assets $ 172.7 Weighted Average Useful Life (in years) Total Technology-based 5 $ 21.1 Marketing-related 3 1.1 Customer-related 13 81.2 Database-related 6 6.0 Total intangible assets $ 109.4

Note 11 - Dispositions and Di_2

Note 11 - Dispositions and Discontinued Operations (Tables)	12 Months Ended
Note 11 - Dispositions and Discontinued Operations (Tables)	Dec. 31, 2023
Notes Tables
Disposal Groups, Including Discontinued Operations [Table Text Block]	For the Year Ended December 31, 2023 2022 2021 Revenues $ 46.8 $ 537.3 $ 536.1 Operating expenses: Cost of revenues (exclusive of items shown separately below) 18.2 207.4 204.1 Selling, general and administrative 33.2 117.2 109.5 Depreciation and amortization of fixed assets - 32.9 36.6 Amortization of intangible assets - 68.5 96.8 Impairment loss - 303.7 - Other operating loss 131.1 33.9 - Total operating expenses 182.5 763.6 447.0 Operating (loss) income (135.7 ) (226.3 ) 89.1 Other income (expense): Investment income (loss) and others, net (5.7 ) 7.0 (0.2 ) Total other income (expense), net (5.7 ) 7.0 (0.2 ) (Loss) income from discontinued operations before income taxes (141.4 ) (219.3 ) 88.9 Income tax (expense) benefit (12.6 ) 131.5 (29.7 ) (Loss) income from discontinued operations, net of income taxes $ (154.0 ) $ (87.8 ) $ 59.2 February 1, 2023 December 31, 2022 Cash and cash equivalents $ 86.3 $ 180.2 Accounts receivable, net 187.1 150.8 Prepaid expenses 17.6 17.8 Other current assets 13.8 13.8 Total current assets: 304.8 362.6 Fixed assets, net 165.2 157.1 Operating lease right-of-use assets, net 29.7 29.8 Intangible assets, net 625.9 616.9 Goodwill 2,165.7 2,136.3 Other noncurrent assets 18.9 16.3 Total noncurrent assets 3,005.4 2,956.4 Total assets held for sale: 3,310.2 3,319.0 Net impairment of asset group(1) (227.8 ) (227.8 ) Total assets held for sale, net $ 3,082.4 $ 3,091.2 Accounts payable and accrued liabilities $ 77.6 $ 68.6 Operating lease liabilities 7.6 6.9 Deferred revenues 207.4 176.6 Income taxes payable 13.6 30.2 Current liabilities held-for-sale: 306.2 282.3 Deferred income tax liabilities 146.2 144.1 Noncurrent lease liabilities 30.0 30.8 Other noncurrent liabilities 2.5 2.7 Noncurrent liabilities held-for-sale 178.7 177.6 Total liabilities held for sale $ 484.9 $ 459.9 For the Year Ended December 31, 2023 2022 2021 Significant non-cash operating activities: Depreciation and amortization of fixed assets $ - $ 32.9 $ 36.6 Amortization of intangible assets - 68.5 96.8 Impairment loss - 303.7 - Operating lease right-of-use assets, net 0.1 7.6 7.7 Investing activities: Capital expenditures (6.5 ) (72.6 ) (59.7 ) Supplemental disclosures: Fixed assets included in accounts payable and accrued liabilities - 3.0 5.0

Note 12 - Goodwill and Intang_2

Note 12 - Goodwill and Intangible Assets (Tables)	12 Months Ended
Note 12 - Goodwill and Intangible Assets (Tables)	Dec. 31, 2023
Notes Tables
Schedule of Goodwill [Table Text Block]	Insurance Specialized Markets Financial Services Total Goodwill at January 1, 2022 $ 1,454.8 $ 117.4 $ 475.4 $ 2,047.6 Acquisitions 284.4 — — 284.4 Purchase accounting reclassifications (0.5 ) — — (0.5 ) Disposition of sold businesses — (116.5 ) (473.2 ) (589.7 ) Impairment Charge — — (1.7 ) (1.7 ) Foreign currency translation adjustment (62.7 ) (0.9 ) (0.5 ) (64.1 ) Goodwill at December 31, 2022 1,676.0 — — 1,676.0 Acquisitions 55.9 — — 55.9 Purchase accounting reclassifications (0.1 ) — — (0.1 ) Foreign currency translation adjustment 29.0 — — 29.0 Goodwill at December 31, 2023 $ 1,760.8 $ — $ — $ 1,760.8
Schedule of Finite-Lived Intangible Assets [Table Text Block]	Weighted Average Useful Life Accumulated (in years) Cost Amortization Net December 31, 2023 Technology-based 8 $ 370.2 $ (261.2 ) $ 109.0 Marketing-related 6 42.7 (38.7 ) 4.0 Contract-based 6 5.0 (5.0 ) - Customer-related 13 542.1 (190.7 ) 351.4 Database-based 8 15.2 (7.9 ) 7.3 Total intangible assets $ 975.2 $ (503.5 ) $ 471.7 December 31, 2022 Technology-based 8 $ 355.1 $ (229.3 ) $ 125.8 Marketing-related 6 41.3 (35.5 ) 5.8 Contract-based 6 5.0 (5.0 ) — Customer-related 13 510.7 (146.7 ) 364.0 Database-based 8 15.0 (5.8 ) 9.2 Total intangible assets $ 927.1 $ (422.3 ) $ 504.8
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Years Ending Amount 2024 $ 72.2 2025 63.1 2026 61.1 2027 52.8 2028 45.7 2029 and thereafter 176.8 Total $ 471.7

Note 13 - Income Taxes (Tables)

Note 13 - Income Taxes (Tables)	12 Months Ended
Note 13 - Income Taxes (Tables)	Dec. 31, 2023
Notes Tables
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	2023 2022 2021 U.S. $ 1,021.9 $ 1,277.1 $ 784.1 Foreign 5.3 (14.7 ) 2.4 Total income before income taxes $ 1,027.2 $ 1,262.4 $ 786.5
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	2023 2022 2021 Current: Federal $ 226.8 $ 247.8 $ 123.8 State and local 52.0 64.7 19.5 Foreign 9.0 1.1 3.0 Total current provision for income taxes 287.8 313.6 146.3 Deferred: Federal (23.4 ) (43.3 ) 20.6 State and local (3.4 ) (11.2 ) 10.5 Foreign (2.2 ) (38.8 ) 2.0 Total deferred provision for income taxes (29.0 ) (93.3 ) 33.1 Provision for income taxes $ 258.8 $ 220.3 $ 179.4
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	2023 2022 2021 Federal statutory rate 21.0 % 21.0 % 21.0 % State and local taxes, net of federal tax benefit 3.7 3.4 2.8 Impact of dispositions - (3.0 ) - UK valuation allowance release - (2.4 ) - Global Intangible Low-taxed Income 1.3 0.4 2.6 Stock-based compensation (1.8 ) (1.7 ) (3.5 ) Other 1.0 (0.2 ) (0.1 ) Effective tax rate 25.2 % 17.5 % 22.8 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	2023 2022 Deferred tax assets: Employee wages and other benefits $ 49.9 $ 54.9 Lease liabilities 55.4 53.3 Net operating loss carryover 9.4 12.0 Interest expense 31.0 31.1 Book/tax energy basis difference - 112.2 Other 17.1 22.0 Total 162.8 285.5 Less valuation allowance (5.6 ) (45.3 ) Deferred tax assets 157.2 240.2 Deferred tax liabilities: Right of use assets (48.3 ) (44.1 ) Fixed assets and intangible assets (194.1 ) (223.9 ) Commissions (18.2 ) (16.8 ) Pensions (57.0 ) (56.5 ) Other (18.9 ) (12.8 ) Deferred tax liabilities (336.5 ) (354.1 ) Deferred tax liabilities, net $ (179.3 ) $ (113.9 )
Summary of Operating Loss Carryforwards [Table Text Block]	Years Ending Amount 2024 - 2031 $ 20.5 2032 - 2036 11.5 2037 - 2043 37.0 Total $ 69.0
Summary of Income Tax Contingencies [Table Text Block]	2023 2022 2021 Unrecognized tax benefit as of January 1 $ 3.2 $ 3.4 $ 9.9 Gross increase in tax positions in prior period 0.8 1.0 1.3 Gross decrease in tax positions in prior period - - (0.1 ) Settlements - (0.6 ) — Lapse of statute of limitations (2.0 ) (0.6 ) (7.7 ) Unrecognized tax benefit as of December 31 $ 2.0 $ 3.2 $ 3.4

Note 14 - Composition of Cert_2

Note 14 - Composition of Certain Financial Statement Caption (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]	2023 2022 Accounts payable and accrued liabilities: Accrued salaries, benefits and other related costs $ 149.4 $ 117.4 Escrow liabilities 3.9 0.4 Accrued interest 19.1 16.3 Trade accounts payable and other accrued expenses 158.4 128.7 Acquisition-related liabilities 10.0 30.0 Total accounts payable and accrued liabilities $ 340.8 $ 292.8
Schedule of Other Assets, Noncurrent [Table Text Block]	2023 2022 Other noncurrent assets: Pension benefits $ 121.4 $ 89.0 Other assets - prepaid expenses 73.2 50.7 Investments in nonpublic companies 231.4 229.8 State income tax receivable 67.7 - Deposits and other 2.4 1.9 Total other noncurrent assets $ 496.1 $ 371.4

Note 15 - Debt (Tables)

Note 15 - Debt (Tables)	12 Months Ended
Note 15 - Debt (Tables)	Dec. 31, 2023
Notes Tables
Schedule of Debt [Table Text Block]	Issuance Maturity Date Date 2023 2022 Short-term debt and current portion of long-term debt: Credit Facilities: Syndicated revolving credit facility Various Various $ - $ 990.0 Bilateral revolving credit facility Various Various - 275.0 Bilateral term loan facility Various Various - 125.0 Finance lease liabilities (1) Various Various 14.5 2.9 Short-term debt and current portion of long-term debt 14.5 1,392.9 Long-term debt: Senior notes: 3.625 9.6 10.0 5/13/2020 5/15/2050 490.4 490.0 4.125 7.8 9.4 3/6/2019 3/15/2029 607.8 609.4 4.000 1.8 2.8 5/15/2015 6/15/2025 898.2 897.2 5.500 3.8 4.0 5/15/2015 6/15/2045 346.2 346.0 5.750 8.9 0 3/3/2023 4/1/2033 491.1 - Finance lease liabilities (1) Various Various 20.0 1.3 Syndicated revolving credit facility debt issuance costs Various Various (1.5 ) (0.7 ) Long-term debt 2,852.2 2,343.2 Total debt $ 2,866.7 $ 3,736.1
Schedule of Maturities of Long-Term Debt [Table Text Block]	Years Ending Amount 2024 $ 14.4 2025 913.3 2026 2.9 2027 2.3 2028 1.4 2029 and thereafter 1,950.0 Total $ 2,884.3

Note 16 - Stockholders' Equity

Note 16 - Stockholders' Equity (Tables)	12 Months Ended
Note 16 - Stockholders' Equity (Tables)	Dec. 31, 2023
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	2023 2022 2021 (In millions, except for share and per share data) Numerator used in basic and diluted EPS: Income from continuing operations $ 768.4 $ 1,042.1 $ 607.1 Less: Net loss (income) attributable to noncontrolling interests 0.2 (0.4 ) (0.1 ) Income from discontinued operations, net of tax (154.0 ) (87.8 ) 59.2 Net income attributable to Verisk $ 614.6 $ 953.9 $ 666.2 Denominator: Weighted average number of common shares used in basic EPS 146,623,989 157,905,718 161,841,441 Effect of dilutive shares: Potential common shares issuable from stock options and stock-based awards 712,170 1,023,224 1,497,468 Weighted average number of common shares and dilutive potential common shares used in diluted EPS 147,336,159 158,928,942 163,338,909
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	2023 2022 Foreign currency translation adjustment $ 130.7 $ (636.9 ) Pension and postretirement adjustment, net of tax (72.5 ) (94.3 ) Accumulated other comprehensive income (losses) $ 58.2 $ (731.2 )
Comprehensive Income (Loss) [Table Text Block]	Tax Benefit Before Tax (Expense) After Tax December 31, 2023 Foreign currency translation adjustment attributable to Verisk $ 67.0 $ — $ 67.0 Foreign currency translation adjustment attributable to noncontrolling interests 0.6 — 0.6 Cumulative translation adjustment recognized upon deconsolidation of the Energy business 700.6 — 700.6 Foreign currency translation adjustment 768.2 — 768.2 Pension and postretirement adjustment before reclassifications 35.1 (8.9 ) 26.2 Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive income (losses) (1) (5.8 ) 1.4 (4.4 ) Pension and postretirement adjustment 29.3 (7.5 ) 21.8 Total other comprehensive income $ 797.5 $ (7.5 ) $ 790.0 December 31, 2022 Foreign currency translation adjustment attributable to Verisk $ (298.9 ) $ — $ (298.9 ) Foreign currency translation adjustment attributable to noncontrolling interests (1.4 ) — (1.4 ) Foreign currency translation adjustment (300.3 ) — (300.3 ) Pension and postretirement adjustment before reclassifications (45.7 ) 13.5 (32.2 ) Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive income (losses) (1) (4.4 ) (1.1 ) (5.5 ) Pension and postretirement adjustment (50.1 ) 12.4 (37.7 ) Total other comprehensive loss $ (350.4 ) $ 12.4 $ (338.0 ) December 31, 2021 Foreign currency translation adjustment $ (45.8 ) $ — $ (45.8 ) Foreign currency translation adjustment attributable to noncontrolling interests (0.5 ) — (0.5 ) Foreign currency translation adjustment (46.3 ) — (46.3 ) Pension and postretirement adjustment before reclassifications 39.8 (9.8 ) 30.0 Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive income (losses) (1) (4.1 ) 1.0 (3.1 ) Pension and postretirement adjustment 35.7 (8.8 ) 26.9 Total other comprehensive loss $ (10.6 ) $ (8.8 ) $ (19.4 )

Note 17 - Compensation Plans (T

Note 17 - Compensation Plans (Tables)	12 Months Ended
Note 17 - Compensation Plans (Tables)	Dec. 31, 2023
Notes Tables
Share-Based Payment Arrangement, Option, Activity [Table Text Block]	Stock Option Restricted Stock PSU Weighted Weighted Weighted Average Average Average Aggregate Grant Date Grant Date Number Exercise Intrinsic Number Fair Value Number Fair Value of Options Price Value of Shares Per Share of Shares Per Share (in millions) Outstanding at January 1, 2021 5,611,777 $ 98.28 $ 613.4 390,054 $ 131.63 145,609 $ 170.75 Granted 750,822 $ 189.29 162,378 $ 189.23 59,144 $ 210.07 Dividend reinvestment — $ — — $ — 980 N/A Exercised or lapsed (1,146,422 ) $ 73.30 $ 147.6 (173,726 ) $ 120.94 (42,610 ) $ 140.70 Canceled, expired or forfeited (149,079 ) $ 155.40 (27,202 ) $ 157.79 — $ — Outstanding at December 31, 2021 5,067,098 $ 115.73 $ 572.6 351,504 $ 161.33 163,123 $ 192.99 Granted 653,802 $ 196.64 201,617 $ 193.33 111,333 $ 168.63 Dividend reinvestment — $ — — $ — 1,371 N/A Exercised or lapsed (1,435,673 ) $ 92.38 $ 129.1 (205,407 ) $ 157.22 (54,927 ) $ 174.42 Canceled, expired or forfeited (261,411 ) $ 181.48 (40,139 ) $ 182.35 (21,406 ) $ 202.55 Outstanding at December 31, 2022 4,023,816 $ 132.90 $ 193.3 307,575 $ 182.07 199,494 $ 195.34 Granted 211,945 $ 185.29 194,236 $ 185.22 48,486 $ 212.86 Dividend reinvestment — $ — — $ — 1,142 N/A Exercised or lapsed (1,295,815 ) $ 108.85 $ 118.1 (178,602 ) $ 179.39 (45,997 ) $ 192.93 Canceled, expired or forfeited (227,436 ) $ 187.56 (32,170 ) $ 183.25 (21,889 ) $ 207.27 Outstanding at December 31, 2023 2,712,510 $ 143.91 $ 257.6 291,039 $ 186.28 181,236 $ 199.62 Exercisable at December 31, 2023 1,947,253 $ 127.43 $ 217.0 Exercisable at December 31, 2022 2,702,075 $ 110.02 $ 182.6 Nonvested at December 31, 2023 765,257 291,039 181,236 Expected to vest at December 31, 2023 643,367 252,146 223,629 (1)
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	2023 2022 2021 Expected volatility 27.28 % 25.33 % 23.66 % Risk-free interest rate 3.77 % 1.55 % 0.39 % Expected term in years 4.0 4.2 4.3 Dividend yield 0.66 % 0.60 % 0.63 % Weighted average grant date fair value per stock option $ 48.14 $ 42.25 $ 35.15
Schedule of Nonvested Share Activity [Table Text Block]	Number of Options Weighted Average Grant-Date Fair Value Per Share Nonvested balance at January 1, 2021 2,117,613 $ 23.39 Granted 750,822 $ 35.15 Vested (825,850 ) $ 21.62 Cancelled or expired (149,079 ) $ 27.54 Nonvested balance at December 31, 2021 1,893,506 $ 28.49 Granted 653,802 $ 42.25 Vested (964,156 ) $ 22.97 Cancelled or expired (261,411 ) $ 35.23 Nonvested balance at December 31, 2022 1,321,741 $ 34.65 Granted 211,945 $ 52.69 Vested (540,993 ) $ 33.08 Cancelled or expired (227,436 ) $ 38.03 Nonvested balance at December 31, 2023 765,257 $ 39.74

Note 18 - Pension and Postret_2

Note 18 - Pension and Postretirement Benefits (Tables)	12 Months Ended
Note 18 - Pension and Postretirement Benefits (Tables)	Dec. 31, 2023
Notes Tables
Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]	Pension Plan and SERP Postretirement Plan 2023 2022 2023 2022 Change in benefit obligation: Benefit obligation at January 1 $ 330.9 $ 431.7 $ 4.2 $ 6.0 Interest cost 17.1 14.7 0.2 0.1 Actuarial (gain) loss (0.8 ) (86.6 ) 1.1 (0.4 ) Plan participants’ contributions — — 1.3 1.3 Benefits paid (29.4 ) (28.9 ) (2.7 ) (2.8 ) Benefit obligation at December 31 $ 317.8 $ 330.9 $ 4.1 $ 4.2 Accumulated benefit obligation at December 31 $ 317.8 $ 330.9 Change in plan assets: Fair value of plan assets at January 1 $ 406.3 $ 546.2 $ 7.6 $ 9.5 Actuarial gain (loss) 47.3 (111.8 ) 0.4 (1.1 ) Employer contributions, net 1.7 0.8 1.5 0.7 Plan participants’ contributions — — 1.3 1.3 Benefits paid (29.4 ) (28.9 ) (2.7 ) (2.8 ) Fair value of plan assets at December 31 $ 425.9 $ 406.3 $ 8.1 $ 7.6 Funded status at December 31 $ (108.1 ) $ (75.4 ) $ (4.0 ) $ (3.4 ) Amounts recognized in the consolidated balance sheets consist of: Pension assets, noncurrent (1) $ (117.4 ) $ (85.6 ) $ (4.0 ) $ (3.4 ) Pension, SERP and postretirement benefits, current (2) 1.0 0.8 — — Pension, SERP and postretirement benefits, noncurrent (3) 8.3 9.4 — — Total Pension, SERP and Postretirement benefits $ (108.1 ) $ (75.4 ) $ (4.0 ) $ (3.4 )
Schedule of Defined Benefit Plans Disclosures [Table Text Block]	Pension Plan and SERP Postretirement Plan 2023 2022 2023 2022 Prior service benefit cost $ 2.4 $ 2.6 $ — $ — Actuarial losses 118.3 147.8 3.6 3.2 Accumulated other comprehensive losses, pretax $ 120.7 $ 150.4 $ 3.6 $ 3.2 Quoted Prices Significant in Active Other Markets for Observable Identical Assets Inputs Total (Level 1) (Level 2) December 31, 2023 Equity Managed equity accounts (1) $ 131.6 $ 131.6 $ — Equity — pooled separate account (2) 38.6 — 38.6 Debt Fixed income manager — separately managed account (5) 138.9 — 138.9 Fixed income manager — pooled separate account (2) 89.2 — 89.2 Fixed income manager — government securities (3) 8.1 8.1 — Others Cash — pooled separate account (2) 5.2 — 5.2 Global real estate account (4) 22.4 — 22.4 Total $ 434.0 $ 139.7 $ 294.3 December 31, 2022 Equity Managed equity accounts (1) $ 128.8 $ 128.8 $ — Equity — pooled separate account (2) 39.7 — 39.7 Debt Fixed income manager — separately managed account (5) 133.6 — 133.6 Fixed income manager — pooled separate account (2) 81.5 — 81.5 Fixed income manager — government securities (3) 7.7 7.7 — Others Cash — pooled separate account (2) 2.7 — 2.7 Global real estate account (4) 20.2 — 20.2 Total $ 414.2 $ 136.5 $ 277.7
Schedule of Net Benefit Costs [Table Text Block]	Pension Plan and SERP Postretirement Plan 2023 2022 2021 2023 2022 2021 Interest cost $ 17.1 $ 14.7 $ 11.0 $ 0.2 $ 0.1 $ 0.1 Expected return on plan assets (24.1 ) (28.2 ) (32.8 ) (0.1 ) (0.2 ) (0.2 ) Amortization of prior service cost (credit) reclassified from accumulated other comprehensive income 0.2 0.2 0.2 — — (0.1 ) Amortization of net actuarial loss reclassified from accumulated other comprehensive income 5.2 4.0 3.8 0.4 0.2 0.2 Net periodic (credit) benefit cost (1.6 ) (9.3 ) (17.8 ) 0.5 0.1 — Less: Amortization of prior service (cost) credit reclassified from accumulated other comprehensive income (0.2 ) (0.2 ) (0.2 ) — — 0.1 Less: Amortization of actuarial loss reclassified from accumulated other comprehensive losses (0.1 ) (0.2 ) (0.2 ) — — — Less: Net loss recognized reclassified from accumulated other comprehensive losses (5.1 ) (3.8 ) (3.6 ) (0.4 ) (0.2 ) (0.2 ) Actuarial (gain) loss (24.3 ) 53.5 (31.1 ) 0.8 1.0 (0.5 ) Total recognized in other comprehensive income (29.7 ) 49.3 (35.1 ) 0.4 0.8 (0.6 ) Total recognized in net periodic benefit credit and other comprehensive (income) loss $ (31.3 ) $ 40.0 $ (52.9 ) $ 0.9 $ 0.9 $ (0.6 )
Defined Benefit Plan, Assumptions [Table Text Block]	Pension Plan and SERP Postretirement Plan Weighted-average assumptions used to determine benefit obligations: 2023 2022 2023 2022 Discount rate 5.37 % 5.49 % 4.75 % 5.25 % Expected return on plan assets 6.50 % 6.25 % 1.75 % 1.75 % Cash balance interest credit rate 4.43 % 2.57 % N/A Weighted-average assumptions used to determine net periodic benefit (credit) cost: 2023 2022 2021 2023 2022 2021 Discount rate 5.48 % 2.75 % 2.49 % 5.25 % 2.25 % 1.50 % Expected return on plan assets 6.25 % 6.25 % 6.50 % 1.75 % 1.75 % 2.00 % Cash balance interest credit rate 4.43 % 2.57 % 2.57 % N/A
Schedule of Expected Benefit Payments [Table Text Block]	Pension Plan Postretirement and SERP Plan Gross Gross Medicare Net Benefit Benefit Subsidy Benefit Amount Amount Payments Amount 2024 $ 29.4 $ 0.8 $ (0.1 ) $ 0.7 2025 $ 28.9 $ 0.7 $ — $ 0.7 2026 $ 28.4 $ 0.6 $ — $ 0.6 2027 $ 28.4 $ 0.5 $ — $ 0.5 2028 $ 27.0 $ 0.4 $ — $ 0.4 2029 and thereafter $ 123.3 $ 1.4 $ — $ 1.4
Schedule of Allocation of Plan Assets [Table Text Block]	Target Percentage of Plan Assets Asset Category Allocation 2023 2022 Equity securities 40.0 % 40.0 % 41.4 % Debt securities 60.0 53.5 52.9 Real Estate — 5.3 5.0 Other — 1.2 0.7 Total 100.0 % 100.0 % 100.0 %

Note 19 - Segment Reporting (Ta

Note 19 - Segment Reporting (Tables)	12 Months Ended
Note 19 - Segment Reporting (Tables)	Dec. 31, 2023
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	2023 2022 2021 Insurance Total Insurance Energy and Specialized Markets Financial Services Total Insurance Energy and Specialized Markets Financial Services Total Revenues $ 2,681.4 $ 2,681.4 $ 2,437.0 $ 22.4 $ 37.6 $ 2,497.0 $ 2,206.9 $ 112.8 $ 142.8 $ 2,462.5 Expenses: Cost of revenues (exclusive of items shown separately below) (876.5 ) (876.5 ) (781.9 ) (19.1 ) (23.6 ) (824.6 ) (704.4 ) (58.9 ) (90.4 ) (853.7 ) Selling, general and administrative (391.8 ) (391.8 ) (347.4 ) (26.7 ) (7.4 ) (381.5 ) (239.1 ) (44.9 ) (29.2 ) (313.2 ) Other operating gain (loss) - - - 450.0 (95.8 ) 354.2 - - (134.0 ) (134.0 ) Investment income (loss) 11.0 11.0 (4.7 ) (0.4 ) (0.2 ) (5.3 ) 1.8 0.6 (0.3 ) 2.1 EBITDA from discontinued operations of the Energy business - - - (117.9 ) - (117.9 ) - 222.3 - 222.3 EBITDA $ 1,424.1 $ 1,424.1 $ 1,303.0 $ 308.3 $ (89.4 ) $ 1,521.9 $ 1,265.2 $ 231.9 $ (111.1 ) $ 1,386.0 EBITDA from discontinued operations of the Energy business - 117.9 (222.3 ) Depreciation and amortization of fixed assets (206.8 ) (164.2 ) (170.3 ) Amortization of intangible assets (74.6 ) (74.4 ) (79.9 ) Interest expense (115.5 ) (138.8 ) (127.0 ) Income before income taxes $ 1,027.2 $ 1,262.4 $ 786.5
Long-Lived Assets by Geographic Areas [Table Text Block]	2023 2022 Long-lived assets: U.S. $ 2,455.7 $ 2,876.5 U.K. 597.9 2,428.9 Other countries 502.4 730.6 Total long-lived assets $ 3,556.0 $ 6,036.0

Schedule II - Valuation and Q_2

Schedule II - Valuation and Qualifying Accounts and Reserves (Tables)	12 Months Ended
	Dec. 31, 2023
Notes Tables
Valuation Allowances and Reserves [Table Text Block]	Balance at Charged to Beginning Costs and Deductions— Balance at Description of Year Expenses (1) Write-offs (2) End of Year Year ended December 31, 2023 Allowance for doubtful accounts $ 14.3 $ 8.7 $ (7.9 ) $ 15.1 Valuation allowance for income taxes $ 45.3 $ 1.2 $ (40.9 ) $ 5.6 Year ended December 31, 2022 Allowance for doubtful accounts $ 15.4 $ 6.4 $ (7.5 ) $ 14.3 Valuation allowance for income taxes $ 38.3 $ 41.2 $ (34.2 ) $ 45.3 Year ended December 31, 2021 Allowance for doubtful accounts $ 14.1 $ 13.8 $ (12.5 ) $ 15.4 Valuation allowance for income taxes $ 30.6 $ 8.1 $ (0.4 ) $ 38.3

Note 2 - Basis of Presentatio_2

Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Unbilled Receivables, Expected Billing Period (Year)		1 year
Nonqualified Stock Option, Contractual Term (Year)		10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)			4 years
Research and Development Expense, Total		$ 36.8	$ 43.1	$ 47.1
Advertising Expense		$ 11.9	$ 14.7	$ 12
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)		4 years
First Option to Extend Corporate Headquarters [Member]
Lessee, Leases, Number of Extensions		1
Lessee, Lease, Extension Lease Term (Year)		10 years		10 years
Second Option to Extend Corporate Headquarters [Member]
Lessee, Leases, Number of Extensions		2
Lessee, Lease, Extension Lease Term (Year)		5 years	5 years
Verisk Financial Services [Member] \| Disposal Group, Held-for-Sale, Not Discontinued Operations [Member]
Impairment of Long-Lived Assets to be Disposed of	$ 73.7			$ 134
Impairment of Intangible Assets (Excluding Goodwill), Total				88.2
Tangible Asset Impairment Charges, Total				$ 45.8

Note 4 - Accounts Receivable -

Note 4 - Accounts Receivable - Accounts Receivable, Net (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Receivables	$ 349.3	$ 304.4
Less allowance for doubtful accounts	(15.1)	(14.3)
Accounts receivable, net	334.2	290.1
Billed Revenues [Member]
Receivables	317.1	273.7
Unbilled Revenues [Member]
Receivables	$ 32.2	$ 30.7

Note 5 - Concentration of Cre_2

Note 5 - Concentration of Credit Risk (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021
Cash, FDIC Insured Amount		$ 250
Number Of Banks	7	5
Cash Balances On Deposit FDIC Insured Amount	$ 171,800	$ 36,000
Cash Deposit with Foreign Banks	$ 129,200	$ 74,900
Revenue Benchmark [Member] \| Customer Concentration Risk [Member]
Number of Customers	50	50	50
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Top Fifty Customers [Member]
Concentration Risk, Percentage	45%	41%	38%
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Individual Customer [Member]
Number of Customers	0	0	0
Concentration Risk, Percentage	3%	3%	3%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Individual Customer [Member]
Number of Customers	0	0
Concentration Risk, Percentage	5%	6%

Note 6 - Revenues (Details Text

Note 6 - Revenues (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Contract with Customer, Asset, after Allowance for Credit Loss, Total	$ 0	$ 0
Revenue, Remaining Performance Obligation, Amount	$ 375,100	$ 321,700
Revenue Remaining Performance Obligation, Current Percentage	99%	98%
Contract with Customer, Liability, Noncurrent	$ 76,400	$ 69,700

Note 6 - Revenues - Disaggregat

Note 6 - Revenues - Disaggregated Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues	$ 2,681.4	$ 2,497	$ 2,462.5
UNITED STATES
Revenues	2,238.3	2,120.1	2,057.7
UNITED KINGDOM
Revenues	190.1	169.5	169
Other Countries [Member]
Revenues	253	207.4	235.8
Specialized Markets [Member]
Revenues	0	22.4	112.8
Insurance [Member]
Revenues	2,681.4	2,437	2,206.9
Insurance [Member] \| Underwriting [Member]
Revenues	1,892.7	1,734.5	1,555.1
Insurance [Member] \| Claims [Member]
Revenues	788.7	702.5	651.8
Financial Services [Member]
Revenues	$ 0	$ 37.6	$ 142.8

Note 6 - Revenues - Summary of

Note 6 - Revenues - Summary of Change in Contract Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Contract Liabilities	$ 321.7	$ 349.3
Revenue	(2,681.4)	(2,497)
Acquisitions		3.4
Dispositions		(61)
Billings	2,737.8	2,527
Revenue	(2,681.4)	(2,497)
Foreign currency translation adjustment, contract with customer	(3)
Contract Liabilities	$ 375.1	$ 321.7

Note 7 - Investments and Fair_3

Note 7 - Investments and Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Equity Securities without Readily Determinable Fair Value, Amount	$ 200,900	$ 201,500
Equity Method Investments	30,500	28,300
Provision for Credit Loss on Investments	0	0
Registered Investment Companies [Member] \| Fair Value, Inputs, Level 1 [Member] \| Fair Value, Recurring [Member]
Investments, Fair Value Disclosure, Total	$ 1,200	$ 4,000

Note 7 - Investments and Fair_4

Note 7 - Investments and Fair Value Measurements - Long-term Debt (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Reported Value Measurement [Member]
Senior Notes (Note 15)	$ 2,833.7	$ 2,342.6
Estimate of Fair Value Measurement [Member]
Senior Notes (Note 15)	$ 2,735.3	$ 2,113.3

Note 8 - Leases (Details Textua

Note 8 - Leases (Details Textual) $ in Millions	12 Months Ended
Note 8 - Leases (Details Textual) $ in Millions	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021
Finance Lease, Liability	$ 34.5
Fixed Assets, Net [Member]
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total	41.2	$ 10.7
Short-term Debt and Current Portion of Long-term Debt and Long-term Debt [Member]
Finance Lease, Liability	$ 34.5	$ 4.2
First Option to Extend Corporate Headquarters [Member]
Lessee, Leases, Number of Extensions	1
Lessee, Lease, Extension Lease Term (Year)	10 years		10 years
Second Option to Extend Corporate Headquarters [Member]
Lessee, Leases, Number of Extensions	2
Lessee, Lease, Extension Lease Term (Year)	5 years	5 years

Note 8 - Leases - Lease Cost an

Note 8 - Leases - Lease Cost and Other Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Operating lease cost	[1]	$ 33.9	$ 47.7
Sublease income		(1.7)	(2)
Depreciation of finance lease assets	[2]	14.4	12.8
Interest on finance lease liabilities	[3]	1	0.5
Total lease cost		47.6	59
Operating cash outflows from operating leases		(34.9)	(46.4)
Operating cash outflows from finance leases		(1)	(0.5)
Financing cash outflows from finance leases		$ (15.7)	$ (14.3)

[1]Included in "Cost of revenues" and "Selling, general and administrative" expenses in our accompanying condensed consolidated statements of operations[2]Included in "Depreciation and amortization of fixed assets" in our accompanying condensed consolidated statements of operations[3]Included in "Interest expense" in our accompanying condensed consolidated statements of operations

Note 8 - Leases - Weighted-aver

Note 8 - Leases - Weighted-average Remaining Lease Terms and Weighted-average Discount Rates (Details)	Dec. 31, 2023	Dec. 31, 2022
Weighted-average remaining lease term - operating leases (in years) (Year)	8 years 2 months 12 days	8 years 6 months
Weighted-average remaining lease term - finance leases (in years) (Year)	3 years 1 month 6 days	1 year 8 months 12 days
Weighted-average discount rate - operating leases	4%	3.80%
Weighted-average discount rate - finance leases	4.20%	2.60%

Note 8 - Leases - Maturities of

Note 8 - Leases - Maturities of Lease Liabilities (Details) $ in Millions	Dec. 31, 2023 USD ($)
2024, operating leases	$ 33.3
2024, financing leases	15.6
2025, operating leases	34.1
2025, financing leases	13.8
2026, operating leases	32.6
2026, financing leases	3.4
2027, operating leases	32.4
2027, financing leases	2.6
2028, operating leases	31.7
2028, financing leases	1.7
2029 and thereafter, operating leases	104.3
2029 and thereafter, finance lease	0
Total lease payments, operating leases	268.4
Total lease payments, finance leases	37.1
Less: Amount representing interest, operating leases	(39.7)
Less: Amount representing interest, finance leases	(2.6)
Present value of total lease payments, operating leases	228.7
Present value of total lease payments, finance leases	$ 34.5

Note 9 - Fixed Assets (Details

Note 9 - Fixed Assets (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Depreciation, Depletion and Amortization, Nonproduction	$ 206.8	$ 164.2	$ 170.3
Capitalized Computer Software, Amortization	165.5	116.6	111.6
Unamortized Costs Capitalized	1.2	51.7
Software and Software Development Costs [Member]
Depreciation, Depletion and Amortization, Nonproduction	4.8	7.6	$ 11.7
Unamortized Costs Capitalized	$ 482.4	$ 389.1

Note 9 - Fixed Assets - Summary

Note 9 - Fixed Assets - Summary of Fixed Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Cost	$ 1,596.6	$ 1,392.4
Accumulated Depreciation and Amortization	(991.7)	(850.9)
Net	604.9	541.5
Furniture and Office Equipment [Member]
Cost	178.5	199.2
Accumulated Depreciation and Amortization	(156.7)	(177.1)
Net	$ 21.8	$ 22.1
Furniture and Office Equipment [Member] \| Minimum [Member]
Useful Life (Year)	3 years	3 years
Furniture and Office Equipment [Member] \| Maximum [Member]
Useful Life (Year)	10 years	10 years
Leasehold Improvements [Member]
Cost	$ 116.5	$ 118.3
Accumulated Depreciation and Amortization	(63)	(54.6)
Net	$ 53.5	$ 63.7
Purchased Software [Member]
Useful Life (Year)	3 years	3 years
Cost	$ 59.9	$ 65.1
Accumulated Depreciation and Amortization	(55.2)	(61)
Net	4.7	4.1
Software Development [Member]
Cost	1,136.6	945.4
Accumulated Depreciation and Amortization	(653)	(504.5)
Net	$ 483.6	$ 440.9
Software Development [Member] \| Minimum [Member]
Useful Life (Year)	3 years	3 years
Software Development [Member] \| Maximum [Member]
Useful Life (Year)	7 years	7 years
Leased Equipment [Member]
Cost	$ 105.1	$ 64.4
Accumulated Depreciation and Amortization	(63.8)	(53.7)
Net	$ 41.3	$ 10.7
Leased Equipment [Member] \| Minimum [Member]
Useful Life (Year)	3 years	3 years
Leased Equipment [Member] \| Maximum [Member]
Useful Life (Year)	4 years	4 years

Note 10 - Acquisitions (Details

Note 10 - Acquisitions (Details Textual) - USD ($) $ in Thousands									1 Months Ended	12 Months Ended
	Apr. 20, 2023	Mar. 01, 2022	Feb. 11, 2022	Dec. 23, 2021	Nov. 02, 2021	Sep. 01, 2021	Jun. 17, 2021	Mar. 02, 2021	Feb. 28, 2023	Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2024	Feb. 01, 2023	Feb. 01, 2022
Goodwill, Acquired During Period										$ 55,900	$ 284,400	[1]
Goodwill, Ending Balance										1,760,800	1,676,000		$ 2,047,600
Payments to Acquire Businesses, Net of Cash Acquired, Total										83,300	448,900		289,800
Escrow Release										0	12,800
Current Portion of Escrow										3,900	0
Business Combination, Contingent Consideration, Liability, Current										10,000	29,900
Business Combination, Contingent Consideration, Liability, Noncurrent										2,100	0
Krug Sachverständigen GmbH [Member]
Business Combination, Consideration Transferred	$ 43,300
Business Combination, Consideration Transferred, Indemnity Escrows	$ 3,800
Goodwill, Ending Balance										33,100
Payments to Acquire Businesses, Net of Cash Acquired, Total										43,300
Mavera [Member]
Business Combination, Consideration Transferred									$ 28,300
Business Acquisition, Percentage of Voting Interests Acquired																100%
Business Combination, Indemnification Assets, Amount as of Acquisition Date															$ 4,200
Goodwill, Acquired During Period										55,900
The 2023 Acquisitions [Member] \| Selling, General and Administrative Expenses [Member]
Business Combination, Acquisition Related Costs										$ 2,500
Opta Information Intelligence Corp. [Member]
Business Combination, Consideration Transferred		$ 217,500
Business Acquisition, Percentage of Voting Interests Acquired		100%
Business Combination, Indemnification Assets, Amount as of Acquisition Date		$ 800
Goodwill, Ending Balance											141,100
Payments to Acquire Businesses, Net of Cash Acquired, Total											217,500
Infutor Data Solutions, LLC [Member]
Business Combination, Consideration Transferred			$ 220,700
Business Acquisition, Percentage of Voting Interests Acquired			100%
Business Combination, Working Capital Escrow			$ 1,500
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High			$ 25,000
Goodwill, Ending Balance											140,300
Payments to Acquire Businesses, Net of Cash Acquired, Total											220,700
The 2022 Acquisitions [Member]
Goodwill, Ending Balance											284,400
Business Acquisition, Goodwill Non-tax Deductible, Amount											144,500
The 2022 Acquisitions [Member] \| Selling, General and Administrative Expenses [Member]
Business Combination, Acquisition Related Costs											$ 1,800
ACTINEO [Member]
Business Acquisition, Percentage of Voting Interests Acquired				96.70%
Goodwill, Ending Balance													121,900
Payments to Acquire Businesses, Net of Cash Acquired, Total				$ 148,900									148,900
Data Driven Safety, LLC [Member]
Business Acquisition, Percentage of Voting Interests Acquired					100%
Goodwill, Ending Balance													74,100
Payments to Acquire Businesses, Net of Cash Acquired, Total					$ 93,500								93,500
Escrow Deposit					$ 2,000
Ignite Acquisition [Member]
Business Acquisition, Percentage of Voting Interests Acquired						100%
Payments to Acquire Businesses, Net of Cash Acquired, Total						$ 13,800
RoskillAcquisitionMember
Business Acquisition, Percentage of Voting Interests Acquired							100%
Payments to Acquire Businesses, Net of Cash Acquired, Total							$ 22,100
Escrow Deposit							$ 4,800
Whitespace Software Limited [Member]
Business Acquisition, Percentage of Voting Interests Acquired								51%
Payments to Acquire Businesses, Net of Cash Acquired, Total								$ 16,800
Whitespace Software Limited [Member] \| Forecast [Member]
Business Acquisition, Percentage of Voting Interests Acquired														49%
The 2021 Acquisitions [Member]
Goodwill, Ending Balance													235,600
Business Acquisition, Goodwill Non-tax Deductible, Amount													161,300
Payments to Acquire Businesses, Net of Cash Acquired, Total													276,900
The 2021 Acquisitions [Member] \| Selling, General and Administrative Expenses [Member]
Business Combination, Acquisition Related Costs													$ 2,800

[1]This adjustment relates to a segment reclassification; refer to Note 19. Segment Reporting

Note 10 - Acquisitions - Assets

Note 10 - Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions				12 Months Ended
		Dec. 23, 2021	Nov. 02, 2021	Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021
Goodwill, Ending Balance				$ 1,760.8	$ 1,676		$ 2,047.6
Less: cash acquired				8	17.4		9.3
Payments to Acquire Businesses, Net of Cash Acquired, Total				83.3	448.9		289.8
Net cash purchase price				83.3	448.9		289.8
Krug Sachverständigen GmbH [Member]
Cash and cash equivalents				7
Accounts receivable				1.8
Other current assets				3.8
Fixed assets				0.2
Operating lease right-of-use assets, net				0
Intangible assets				15.1
Goodwill, Ending Balance				33.1
Total assets acquired				61
Accounts payable and accrued liabilities				5.8
Operating lease liabilities				0
Deferred income tax, net				4.8
Other noncurrent liabilities				0.1
Total liabilities assumed				10.7
Net assets acquired				50.3
Less: cash acquired				7
Payments to Acquire Businesses, Net of Cash Acquired, Total				43.3
Net cash purchase price				43.3
Acquisition, Others [Member]
Cash and cash equivalents				1	0	[1]	3.7	[1]
Accounts receivable				0.8	0		1.4
Other current assets				0.1	0.1		1
Fixed assets				0.1	0.3		0.1
Operating lease right-of-use assets, net				0.2	0		1.3
Intangible assets				18.4	2.3		19
Goodwill, Ending Balance				22.8	3		39.6
Total assets acquired				43.4	5.7		66.2
Accounts payable and accrued liabilities				2.1
Operating lease liabilities				0.1	0		1.4
Deferred income tax, net				3.9	0.5		3.7
Other noncurrent liabilities				1.4	0.2		0
Total liabilities assumed				7.5	0.9		8.2
Net assets acquired				35.9	4.8		58
Less: cash acquired				1	0		3.7
Payments to Acquire Businesses, Net of Cash Acquired, Total				34.9	4.8		34.5
Other assets					0		0.1
Current liabilities	[1]				0.1		1.7
Deferred revenues					0.1		1.4
Net cash purchase price				34.9	4.8		34.5
Less: Noncontrolling interests							19.8
Acquisition 2023 [Member]
Cash and cash equivalents				8
Accounts receivable				2.6
Other current assets				3.9
Fixed assets				0.3
Operating lease right-of-use assets, net				0.2
Intangible assets				33.5
Goodwill, Ending Balance				55.9
Total assets acquired				104.4
Accounts payable and accrued liabilities				7.9
Operating lease liabilities				0.1
Deferred income tax, net				8.7
Other noncurrent liabilities				1.5
Total liabilities assumed				18.2
Net assets acquired				86.2
Less: cash acquired				8
Payments to Acquire Businesses, Net of Cash Acquired, Total				78.2
Net cash purchase price				$ 78.2
Opta Information Intelligence Corp. [Member]
Cash and cash equivalents	[1]				0.4
Accounts receivable					5.2
Other current assets					1.3
Fixed assets					1.5
Operating lease right-of-use assets, net					1.1
Intangible assets					87
Goodwill, Ending Balance					141.1
Total assets acquired					237.6
Operating lease liabilities					1.1
Deferred income tax, net					13.5
Other noncurrent liabilities					0
Total liabilities assumed					19.7
Net assets acquired					217.9
Less: cash acquired					0.4
Payments to Acquire Businesses, Net of Cash Acquired, Total					217.5
Other assets					0
Current liabilities	[1]				4.9
Deferred revenues					0.2
Net cash purchase price					217.5
Infutor Data Solutions, LLC [Member]
Cash and cash equivalents	[1]				17
Accounts receivable					10.7
Other current assets					3.8
Fixed assets					0.9
Operating lease right-of-use assets, net					2.3
Intangible assets					83.4
Goodwill, Ending Balance					140.3
Total assets acquired					258.5
Operating lease liabilities					3.3
Deferred income tax, net					0
Other noncurrent liabilities					0
Total liabilities assumed					20.8
Net assets acquired					237.7
Less: cash acquired					17
Payments to Acquire Businesses, Net of Cash Acquired, Total					220.7
Other assets					0.1
Current liabilities	[1]				14.4
Deferred revenues					3.1
Net cash purchase price					220.7
2022 Acquisition [Member]
Cash and cash equivalents	[1]				17.4
Accounts receivable					15.9
Other current assets					5.2
Fixed assets					2.7
Operating lease right-of-use assets, net					3.4
Intangible assets					172.7
Goodwill, Ending Balance					284.4
Total assets acquired					501.8
Operating lease liabilities					4.4
Deferred income tax, net					14
Other noncurrent liabilities					0.2
Total liabilities assumed					41.4
Net assets acquired					460.4
Less: cash acquired					17.4
Payments to Acquire Businesses, Net of Cash Acquired, Total					443
Other assets					0.1
Current liabilities	[1]				19.4
Deferred revenues					3.4
Net cash purchase price					$ 443
ACTINEO [Member]
Cash and cash equivalents	[1]						0.2
Accounts receivable							1.8
Other current assets							0
Fixed assets							1.4
Operating lease right-of-use assets, net							4.2
Intangible assets							48.3
Goodwill, Ending Balance							121.9
Total assets acquired							177.8
Operating lease liabilities							4.2
Deferred income tax, net							15.8
Other noncurrent liabilities							0
Total liabilities assumed							22.1
Net assets acquired							155.7
Less: cash acquired							0.2
Payments to Acquire Businesses, Net of Cash Acquired, Total		$ 148.9					148.9
Other assets							0
Current liabilities	[1]						2.1
Deferred revenues							0
Net cash purchase price		$ 148.9					148.9
Less: Noncontrolling interests							6.6
Data Driven Safety, LLC [Member]
Cash and cash equivalents	[1]						2.5
Accounts receivable							1
Other current assets							2
Fixed assets							0
Operating lease right-of-use assets, net							0.4
Intangible assets							42.1
Goodwill, Ending Balance							74.1
Total assets acquired							122.1
Operating lease liabilities							0.4
Deferred income tax, net							0
Other noncurrent liabilities							21.7
Total liabilities assumed							25.2
Net assets acquired							96.9
Less: cash acquired							3.4
Payments to Acquire Businesses, Net of Cash Acquired, Total			$ 93.5				93.5
Other assets							0
Current liabilities	[1]						2.7
Deferred revenues							0.4
Net cash purchase price			$ 93.5				93.5
Less: Noncontrolling interests							0
The 2021 Acquisitions [Member]
Cash and cash equivalents	[1]						6.4
Accounts receivable							4.2
Other current assets							3
Fixed assets							1.5
Operating lease right-of-use assets, net							5.9
Intangible assets							109.4
Goodwill, Ending Balance							235.6
Total assets acquired							366.1
Operating lease liabilities							6
Deferred income tax, net							19.5
Other noncurrent liabilities							21.7
Total liabilities assumed							55.5
Net assets acquired							310.6
Less: cash acquired							7.3
Payments to Acquire Businesses, Net of Cash Acquired, Total							276.9
Other assets							0.1
Current liabilities	[1]						6.5
Deferred revenues							1.8
Net cash purchase price							276.9
Less: Noncontrolling interests							$ 26.4

[1]Within cash and cash equivalents, there is $5.7 million of restricted cash related to Franco Signor's professional administrative services for Medicare Set Asides, with an offsetting liability of $5.7 million included within current liabilities.

Note 10 - Acquisitions - Amount

Note 10 - Acquisitions - Amounts Assigned to Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Weighted average useful life (Year)			6 years
Total intangible assets	$ 33.5		$ 6
The 2021 Acquisitions [Member]
Total intangible assets		$ 172.7
2020 Acquisitions [Member]
Total intangible assets			$ 109.4
Technology-Based Intangible Assets [Member]
Weighted average useful life (Year)	5 years
Total intangible assets	$ 9.9
Technology-Based Intangible Assets [Member] \| The 2021 Acquisitions [Member]
Weighted average useful life (Year)		6 years
Total intangible assets		$ 48.5
Technology-Based Intangible Assets [Member] \| 2020 Acquisitions [Member]
Weighted average useful life (Year)			5 years
Total intangible assets			$ 21.1
Marketing-Related Intangible Assets [Member]
Weighted average useful life (Year)	2 years
Total intangible assets	$ 0.5
Marketing-Related Intangible Assets [Member] \| The 2021 Acquisitions [Member]
Weighted average useful life (Year)		4 years
Total intangible assets		$ 2
Marketing-Related Intangible Assets [Member] \| 2020 Acquisitions [Member]
Weighted average useful life (Year)			3 years
Total intangible assets			$ 1.1
Customer-Related Intangible Assets [Member]
Weighted average useful life (Year)	13 years
Total intangible assets	$ 23.1
Customer-Related Intangible Assets [Member] \| The 2021 Acquisitions [Member]
Weighted average useful life (Year)		13 years
Total intangible assets		$ 122.2
Customer-Related Intangible Assets [Member] \| 2020 Acquisitions [Member]
Weighted average useful life (Year)			13 years
Total intangible assets			$ 81.2

Note 11 - Dispositions and Di_3

Note 11 - Dispositions and Discontinued Operations (Details Textual) - Discontinued Operations, Held-for-Sale [Member] - Energy Business [Member] - USD ($) $ in Millions			12 Months Ended
	Feb. 01, 2023	Oct. 28, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disposal Group, Including Discontinued Operation, Consideration	$ 3,066.4	$ 3,100
Disposal Group, Including Discontinued Operation, Contingent Cash Consideration		200
Impairment of Long-Lived Assets to be Disposed of		$ 303.7	$ 0	$ 303.7	$ 0
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ (128.4)
Discontinued Operation, Amount of Adjustment to Prior Period Gain (Loss) on Disposal, before Income Tax			$ 2.7

Note 11 - Dispositions and Di_4

Note 11 - Dispositions and Discontinued Operations - Divestitures and Business Held for Sale (Details) - USD ($) $ in Millions			12 Months Ended
		Oct. 28, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Feb. 01, 2023
Total current assets:			$ 0	$ 362.6
Total noncurrent assets			0	2,728.6
Current liabilities held-for-sale:			0	282.3
Noncurrent liabilities held-for-sale			0	177.6
Energy Business [Member] \| Discontinued Operations, Held-for-Sale [Member]
Revenues			46.8	537.3	$ 536.1
Cost of revenues (exclusive of items shown separately below)			18.2	207.4	204.1
Selling, general and administrative			33.2	117.2	109.5
Depreciation and amortization of fixed assets			0	32.9	36.6
Amortization of intangible assets			0	68.5	96.8
Impairment of Long-Lived Assets to be Disposed of		$ 303.7	0	303.7	0
Other operating loss			131.1	33.9	0
Total operating expenses			182.5	763.6	447
Operating (loss) income			(135.7)	(226.3)	89.1
Investment income (loss) and others, net			(5.7)	7	(0.2)
Total other income (expense), net			(5.7)	7	(0.2)
(Loss) income from discontinued operations before income taxes			(141.4)	(219.3)	88.9
Income tax (expense) benefit			(12.6)	131.5	(29.7)
(Loss) income from discontinued operations, net of income taxes			(154)	(87.8)	59.2
Cash and cash equivalents				180.2		$ 86.3
Accounts receivable, net				150.8		187.1
Prepaid expenses				17.8		17.6
Other current assets				13.8		13.8
Total current assets:				362.6		304.8
Fixed assets, net				157.1		165.2
Operating lease right-of-use assets, net				29.8		29.7
Intangible assets, net				616.9		625.9
Goodwill				2,136.3		2,165.7
Other noncurrent assets				16.3		18.9
Total noncurrent assets				2,956.4		3,005.4
Total assets held for sale:				3,319		3,310.2
Net impairment of asset group(1)	[1]			(227.8)		(227.8)
Total assets held for sale, net				3,091.2		3,082.4
Accounts payable and accrued liabilities				68.6		77.6
Operating lease liabilities				6.9		7.6
Deferred revenues				176.6		207.4
Income taxes payable				30.2		13.6
Current liabilities held-for-sale:				282.3		306.2
Deferred income tax liabilities				144.1		146.2
Noncurrent lease liabilities				30.8		30
Other noncurrent liabilities				2.7		2.5
Noncurrent liabilities held-for-sale				177.6		178.7
Total liabilities held for sale				459.9		$ 484.9
Depreciation and amortization of fixed assets			0	32.9	36.6
Amortization of intangible assets			0	68.5	96.8
Operating lease right-of-use assets, net			0.1	7.6	7.7
Capital expenditures			(6.5)	(72.6)	(59.7)
Fixed assets included in accounts payable and accrued liabilities			$ 0	$ 3	$ 5

[1]In connection with the held for sale classification, we recognized a $303.7 million impairment, partially offset by a deferred tax benefit of $75.9 million on the remeasurement of the disposal group held for sale. This impairment was charged to a contra asset account within "Other noncurrent assets" per ASC 205-20, Discontinued Operations.

Note 12 - Goodwill and Intang_3

Note 12 - Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Amortization of Intangible Assets	$ 74,600	$ 74,400	$ 79,900
Other Operating Income (Expense) [Member]
Impairment of Long-Lived Assets to be Disposed of	$ 0	$ 73,700

Note 12 - Goodwill and Intang_4

Note 12 - Goodwill and Intangible Assets - Summary of Changes in Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill	$ 1,676	$ 2,047.6
Goodwill, Acquired During Period	55.9	284.4	[1]
Purchase accounting reclassifications	(0.1)	(0.5)
Disposition of sold businesses		(589.7)
Impairment Charge		(1.7)
Foreign currency translation adjustment	29	(64.1)
Goodwill	1,760.8	1,676
Insurance [Member]
Goodwill	1,676	1,454.8
Goodwill, Acquired During Period	55.9	284.4	[1]
Purchase accounting reclassifications	(0.1)	(0.5)
Disposition of sold businesses		0
Impairment Charge		0
Foreign currency translation adjustment	29	(62.7)
Goodwill	1,760.8	1,676
Energy and Specialized Markets [Member]
Goodwill	0	117.4
Goodwill, Acquired During Period	0	0	[1]
Purchase accounting reclassifications	0	0
Disposition of sold businesses		(116.5)
Impairment Charge		0
Foreign currency translation adjustment	0	(0.9)
Goodwill	0	0
Financial Services [Member]
Goodwill	0	475.4
Goodwill, Acquired During Period	0	0	[1]
Purchase accounting reclassifications	0	0
Disposition of sold businesses		(473.2)
Impairment Charge		(1.7)
Foreign currency translation adjustment	0	(0.5)
Goodwill	$ 0	$ 0

[1]This adjustment relates to a segment reclassification; refer to Note 19. Segment Reporting

Note 12 - Goodwill and Intang_5

Note 12 - Goodwill and Intangible Assets - Intangible Assets and Related Accumulated Amortization (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Cost	$ 975.2	$ 927.1
Accumulated amortization	(503.5)	(422.3)
Net	$ 471.7	$ 504.8
Technology-Based Intangible Assets [Member]
Weighted average useful life (Year)	8 years	8 years
Cost	$ 370.2	$ 355.1
Accumulated amortization	(261.2)	(229.3)
Net	$ 109	$ 125.8
Marketing-Related Intangible Assets [Member]
Weighted average useful life (Year)	6 years	6 years
Cost	$ 42.7	$ 41.3
Accumulated amortization	(38.7)	(35.5)
Net	$ 4	$ 5.8
Contract-Based Intangible Assets [Member]
Weighted average useful life (Year)	6 years	6 years
Cost	$ 5	$ 5
Accumulated amortization	(5)	(5)
Net	$ 0	$ 0
Customer-Related Intangible Assets [Member]
Weighted average useful life (Year)	13 years	13 years
Cost	$ 542.1	$ 510.7
Accumulated amortization	(190.7)	(146.7)
Net	$ 351.4	$ 364
Database [Member]
Weighted average useful life (Year)	8 years	8 years
Cost	$ 15.2	$ 15
Accumulated amortization	(7.9)	(5.8)
Net	$ 7.3	$ 9.2

Note 12 - Goodwill and Intang_6

Note 12 - Goodwill and Intangible Assets - Estimated Amortization Expense (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
2024	$ 72.2
2025	63.1
2026	61.1
2027	52.8
2028	45.7
2029 and thereafter	176.8
Total	$ 471.7	$ 504.8

Note 13 - Income Taxes (Details

Note 13 - Income Taxes (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Effective Income Tax Rate Reconciliation, Litigation Reserve Expense, Amount	$ 38.2
Deferred Tax Liabilities, Net, Total	179.3	$ 113.9
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	0.2	$ 0.4	$ 0.5
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 0.7
State and Local Jurisdiction [Member] \| Pennsylvania Department of Revenue [Member]
Income Tax Examination, Year under Examination		2019 2020 2021

Note 13 - Income Taxes - Domest

Note 13 - Income Taxes - Domestic and Foreign Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
U.S.	$ 1,021.9	$ 1,277.1	$ 784.1
Foreign	5.3	(14.7)	2.4
Total income before income taxes	$ 1,027.2	$ 1,262.4	$ 786.5

Note 13 - Income Taxes - Provis

Note 13 - Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Federal	$ 226.8	$ 247.8	$ 123.8
State and local	52	64.7	19.5
Foreign	9	1.1	3
Total current provision for income taxes	287.8	313.6	146.3
Federal	(23.4)	(43.3)	20.6
State and local	(3.4)	(11.2)	10.5
Foreign	(2.2)	(38.8)	2
Total deferred provision for income taxes	(29)	(93.3)	33.1
Provision for income taxes	$ 258.8	$ 220.3	$ 179.4

Note 13 - Income Taxes - Effect

Note 13 - Income Taxes - Effective Tax Rate on Income from Continuing Operations (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Federal statutory rate	21%	21%	21%
State and local taxes, net of federal tax benefit	3.70%	3.40%	2.80%
Impact of dispositions	0%	(3.00%)	0%
UK valuation allowance release	0%	(2.40%)	0%
Global Intangible Low-taxed Income	1.30%	0.40%	2.60%
Stock-based compensation	(1.80%)	(1.70%)	(3.50%)
Other	1%	(0.20%)	(0.10%)
Effective tax rate	25.20%	17.50%	22.80%

Note 13 - Income Taxes - Summar

Note 13 - Income Taxes - Summary of Deferred Tax Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Employee wages and other benefits	$ 49.9	$ 54.9
Lease liabilities	55.4	53.3
Net operating loss carryover	9.4	12
Interest expense	31	31.1
Book/tax energy basis difference	0	112.2
Other	17.1	22
Total	162.8	285.5
Less valuation allowance	(5.6)	(45.3)
Deferred tax assets	157.2	240.2
Right of use assets	(48.3)	(44.1)
Fixed assets and intangible assets	(194.1)	(223.9)
Commissions	(18.2)	(16.8)
Pensions	(57)	(56.5)
Other	(18.9)	(12.8)
Deferred tax liabilities	(336.5)	(354.1)
Deferred tax liabilities, net	$ (179.3)	$ (113.9)

Note 13 - Income Taxes - Summ_2

Note 13 - Income Taxes - Summary of Company's Net Operating Loss Carryforwards Expires (Details) $ in Millions	Dec. 31, 2023 USD ($)
Operating loss carryforwards	$ 69
Period One [Member]
Operating loss carryforwards	20.5
Period Two [Member]
Operating loss carryforwards	11.5
Period Three [Member]
Operating loss carryforwards	$ 37

Note 13 - Income Taxes - Reconc

Note 13 - Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefit (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 01, 2022	Dec. 31, 2023	Dec. 31, 2021
Unrecognized tax benefit as of January 1	$ 3.4	$ 3.2	$ 9.9
Gross increase in tax positions in prior period	1	0.8	1.3
Gross decrease in tax positions in prior period	0	0	(0.1)
Settlements	(0.6)	0	0
Lapse of statute of limitations	(0.6)	(2)	(7.7)
Unrecognized tax benefit as of December 31	$ 3.2	$ 2	$ 3.4

Note 14 - Composition of Cert_3

Note 14 - Composition of Certain Financial Statement Caption - Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Accrued salaries, benefits and other related costs	$ 149.4	$ 117.4
Escrow liabilities	3.9	0.4
Accrued interest	19.1	16.3
Trade accounts payable and other accrued expenses	158.4	128.7
Acquisition-related liabilities	10	30
Total accounts payable and accrued liabilities	$ 340.8	$ 292.8

Note 14 - Composition of Cert_4

Note 14 - Composition of Certain Financial Statement Caption - Components of Other Noncurrent Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Pension benefits	$ 121.4	$ 89
Other assets - prepaid expenses	73.2	50.7
Investments in nonpublic companies	231.4	229.8
State income tax receivable	67.7	0
Deposits and other	2.4	1.9
Total other noncurrent assets	$ 496.1	$ 371.4

Note 15 - Debt (Details Textual

Note 15 - Debt (Details Textual) $ in Millions			12 Months Ended
Note 15 - Debt (Details Textual) $ in Millions	Apr. 05, 2023 USD ($)	Sep. 09, 2022	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Mar. 03, 2023 USD ($)	Feb. 28, 2023 USD ($)	Mar. 11, 2022 USD ($)
Interest Payable, Current			$ 19.1	$ 16.3
Interest Expense Excluding Earn Out Interest			131.3	135.5	$ 127
Letters of Credit Outstanding, Amount			4.6	4.4
Bilateral Term Loan Agreement [Member]
Debt Instrument, Face Amount								$ 125
BSBY Margin [Member] \| Bilateral Term Loan Agreement [Member]
Debt Instrument, Basis Spread on Variable Rate		1.35%
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,000		1,000
Line of Credit Facility, Maximum Borrowing Capacity			995.4	5.6
Debt Instrument, Leverage Ratio	3.75
Debt Instrument, Covenant, Leverage Ratio, First Request Increase	4.50%
Debt Instrument, Covenant, Leverage Ratio, Second Request Increase	4.25%
Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction	$ 1.2
Revolving Credit Facility [Member] \| Bilateral Term Loan Agreement [Member]
Line of Credit Facility, Current Borrowing Capacity							$ 275
Revolving Credit Facility [Member] \| Minimum [Member]
Line of Credit Facility, Commitment Fee Percentage	0.08%
Revolving Credit Facility [Member] \| Maximum [Member]
Line of Credit Facility, Commitment Fee Percentage	0.175%
Revolving Credit Facility [Member] \| Secured Overnight Financing Rate (SOFR) [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	1%
Revolving Credit Facility [Member] \| Secured Overnight Financing Rate (SOFR) [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	1.625%
Senior Notes [Member]
Long-Term Debt, Gross			$ 2,850	$ 2,850		$ 500
Debt Instrument, Interest Rate, Stated Percentage						5.75%
Debt Instrument, Unamortized Discount, Current						$ 4.7
Debt Issuance Costs, Gross						$ 5.5

Note 15 - Debt - Short-term and

Note 15 - Debt - Short-term and Long-term Debt (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022
Unamortized discount		$ 14.5	$ 1,392.9
Syndicated revolving credit facility debt issuance costs		(1.5)	(0.7)
Long-term debt		2,852.2	2,343.2
Total debt		2,866.7	3,736.1
The 3.625% Senior Note [Member]
Long-term debt		490.4	490
The 4.125% Senior Note [Member]
Long-term debt		607.8	609.4
The 4.000% Senior Note [Member]
Long-term debt		898.2	897.2
The 5.500% Senior Note [Member]
Long-term debt		346.2	346
The 5.750% Senior Notes [Member]
Long-term debt		491.1	0
Short-term Debt and Current Portion of Long-term Debt [Member]
Finance lease liabilities, current	[1]	14.5	2.9
Long-Term Debt [Member]
Finance lease liabilities, noncurrent	[1]	20	1.3
Line of Credit [Member]
Syndicated revolving credit facility		0	990
Term Loan Facility [Member]
Short term debt		0	275
Bilateral Term Loan Agreement [Member]
Short term debt		$ 0	$ 125

[1]Refer to Note 8. Leases

Note 15 - Debt - Short-term a_2

Note 15 - Debt - Short-term and Long-term Debt (Details) (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
The 3.625% Senior Note [Member]
Interest rate	3.625%	3.625%
Unamortized discount (premium)	$ 9,600	$ 10,000
The 4.125% Senior Note [Member]
Interest rate	4.125%	4.125%
Unamortized discount (premium)	$ 7,800	$ 9,400
The 4.000% Senior Note [Member]
Interest rate	4%	4%
Unamortized discount	$ 1,800	$ 2,800
The 5.500% Senior Note [Member]
Interest rate	5.50%	5.50%
Unamortized discount	$ 3,800	$ 4,000
The 5.750% Senior Notes [Member]
Interest rate	5.75%	5.75%
Unamortized discount	$ 8,900	$ 0

Note 15 - Debt - Debt Maturitie

Note 15 - Debt - Debt Maturities (Details) $ in Millions	Dec. 31, 2023 USD ($)
2024, debt	$ 14.4
2025, debt	913.3
2026, debt	2.9
2027, debt	2.3
2028, debt	1.4
2027 and thereafter, debt	1,950
Total, debt	$ 2,884.3

Note 16 - Stockholders' Equit_2

Note 16 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions									1 Months Ended			12 Months Ended
	Feb. 14, 2024	Dec. 14, 2023	Oct. 25, 2023	Jul. 26, 2023	Apr. 25, 2023	Mar. 07, 2023	Feb. 14, 2023	Dec. 14, 2022	Feb. 21, 2024	Dec. 31, 2023	Feb. 28, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Mar. 31, 2023	Nov. 08, 2022
Common Stock, Shares Authorized (in shares)										2,000,000,000		2,000,000,000	2,000,000,000
Share Price (in dollars per share)										$ 238.86		$ 238.86	$ 176.42	$ 228.73
Preferred Stock, Shares Authorized (in shares)										80,000,000		80,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)										$ 0.001		$ 0.001
Preferred Stock, Shares Issued (in shares)										0		0	0
Common Stock, Dividends, Per Share, Declared (in dollars per share)			$ 0.34	$ 0.34	$ 0.34		$ 0.34
Payments of Dividends, Total												$ 196.8	$ 195.2	$ 188.2
Treasury Stock, Shares, Acquired (in shares)												12,849,921	8,600,963	2,545,191
Treasury Stock, Value, Acquired, Cost Method													$ 1,662.5	$ 475
Treasury Stock, Shares, Total (in shares)										400,694,309		400,694,309	389,301,902
Common Stock Reissued (in shares)												1,457,514	1,650,460	1,379,304
Common Stock, Weighted Average Price (in dollars per share)										$ 19.5		$ 19.5	$ 14.25	$ 11.78
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)												540,221	1,350,159	620,241
Subsequent Event [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.39
Accelerated Share Repurchase ("ASR") Agreement [Member]
Stock Repurchase Program, Authorized Amount										$ 250		$ 250	$ 250		$ 2,500
Treasury Stock, Shares, Acquired (in shares)						10,655,301		1,168,224		873,479
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)										$ 243.28
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)										$ 243.28
Treasury Stock, Value, Acquired, Cost Method		$ 250
Treasury Stock, Percentage of Aggregate Purchase Price										85%		85%
Accelerated Share Repurchase ("ASR") Agreement [Member] \| Subsequent Event [Member]
Treasury Stock, Shares, Acquired (in shares)									178,227
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)									$ 237.71
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)									$ 237.71
Share Repurchase Programs [Member]
Treasury Stock, Shares, Acquired (in shares)										865,232	247,487	12,849,921
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)										$ 217	$ 176.68	$ 219.96
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)										$ 217	$ 176.68	$ 219.96
Stock Repurchase Program, Remaining Authorized Repurchase Amount										$ 641.5		$ 641.5
Additonal Repurchase Authorization Shares Upon Sale of Energy Business [Member]
Stock Repurchase Program, Authorized Amount																$ 3,000

Note 16 - Stockholders' Equit_3

Note 16 - Stockholders' Equity - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income from continuing operations	$ 768.4	$ 1,042.1	$ 607.1
Less: Net loss (income) attributable to noncontrolling interests	0.2	(0.4)	(0.1)
Income from discontinued operations, net of tax	(154)	(87.8)	59.2
Net income attributable to Verisk	$ 614.6	$ 953.9	$ 666.2
Weighted average number of common shares used in basic EPS (in shares)	146,623,989	157,905,718	161,841,441
Potential common shares issuable from stock options and stock-based awards (in shares)	712,170	1,023,224	1,497,468
Weighted average number of common shares and dilutive potential common shares used in diluted EPS (in shares)	147,336,159	158,928,942	163,338,909

Note 16 - Stockholders' Equit_4

Note 16 - Stockholders' Equity - Summary of Accumulated Other Comprehensive Losses (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Foreign currency translation adjustment	$ 130.7	$ (636.9)
Pension and postretirement adjustment, net of tax	(72.5)	(94.3)
Accumulated other comprehensive income (losses)	$ 58.2	$ (731.2)

Note 16 - Stockholders' Equit_5

Note 16 - Stockholders' Equity - Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Foreign currency translation adjustment attributable to Verisk, before tax	$ 67	$ (298.9)	$ (45.8)
Foreign currency translation adjustment attributable to Verisk, tax	0	0
Foreign currency translation adjustment attributable to Verisk, after tax	67	(298.9)	(45.8)
Foreign currency translation adjustment attributable to noncontrolling interests, before tax	0.6	(1.4)	(0.5)
Foreign currency translation adjustment attributable to noncontrolling interests, tax	0	0	0
Foreign currency translation adjustment attributable to noncontrolling interests, after tax	0.6	(1.4)	(0.5)
Cumulative translation adjustment recognized upon deconsolidation of the Energy business, before tax	700.6
Cumulative translation adjustment recognized upon deconsolidation of the Energy business, tax	0
Cumulative translation adjustment recognized upon deconsolidation of the Energy business, after tax	700.6
Foreign currency translation adjustment, before tax	768.2	(300.3)	(46.3)
Foreign currency translation adjustment, tax	0	0	0
Foreign currency translation adjustment, after tax	768.2	(300.3)	(46.3)
Total other comprehensive income, before tax	797.5	(350.4)	(10.6)
Total other comprehensive income, tax	(7.5)	12.4	(8.8)
Total other comprehensive income, after tax	790	(338)	(19.4)
Pension and Postretirement Adjustment [Member]
Other comprehensive income (loss), before reclassifications, before tax	35.1	(45.7)	39.8
Other comprehensive income (loss), before reclassifications, tax	(8.9)	13.5	(9.8)
Other comprehensive income (loss), before reclassifications, after tax	26.2	(32.2)	30
Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive income (losses), before tax	(5.8)	(4.4)	(4.1)
Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive income (losses), tax	1.4	(1.1)	1
Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive income (losses), after tax	(4.4)	(5.5)	(3.1)
Other comprehensive income (loss), before tax	29.3	(50.1)	35.7
Other comprehensive income (loss), tax	(7.5)	12.4	(8.8)
Other comprehensive income (loss), after tax	$ 21.8	$ (37.7)	$ 26.9

Note 17 - Compensation Plans (D

Note 17 - Compensation Plans (Details Textual)		12 Months Ended			22 Months Ended
Note 17 - Compensation Plans (Details Textual)	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%			5%
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%			20%
Share Based Compensation Arrangement By Share Based Payment Award, Percentage Of Short Term Incentive Compensation Available For Payroll Deductions Maximum		50%
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%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Target Levels		200%
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%		10%
Percentage Of Employer Contribution	100%
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%
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

Note 17 - Compensation Plans -

Note 17 - Compensation Plans - Summary of Stock Activity (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Outstanding beginning balance, options (in shares)		4,023,816	5,067,098	5,611,777
Outstanding beginning balance, options, weighted average exercise price (in dollars per share)		$ 132.9	$ 115.73	$ 98.28
Outstanding, options, aggregate intrinsic value		$ 257.6	$ 193.3	$ 572.6	$ 613.4
Number of options, granted (in shares)		211,945	653,802	750,822
Granted, options, weighted average exercise price (in dollars per share)		$ 185.29	$ 196.64	$ 189.29
Dividend reinvestment, options (in shares)		0	0	0
Dividend reinvestment, options, weighted average exercise price (in (in dollars per share)		$ 0	$ 0	$ 0
Exercised or lapsed, options (in shares)		(1,295,815)	(1,435,673)	(1,146,422)
Exercised or lapsed, options, weighted average exercise price (in dollars per share)		$ 108.85	$ 92.38	$ 73.3
Exercised or lapsed, options, aggregate intrinsic value		$ 118.1	$ 129.1	$ 147.6
Canceled, expired or forfeited, option (in shares)		(227,436)	(261,411)	(149,079)
Canceled, expired or forfeited, options, weighted average exercise price (in dollars per share)		$ 187.56	$ 181.48	$ 155.4
Outstanding beginning balance, options, weighted average exercise price (in dollars per share)		143.91	132.9	115.73
Outstanding beginning balance, options, weighted average exercise price (in dollars per share)		$ 143.91	$ 132.9	$ 115.73	$ 98.28
Outstanding, option (in shares)		2,712,510	4,023,816	5,067,098
Exercisable, options (in shares)		1,947,253	2,702,075
Exercisable, options, weighted average exercise price (in dollars per share)		$ 127.43	$ 110.02
Exercisable, options, aggregate intrinsic value		$ 217	$ 182.6
Nonvested, options (in shares)		765,257	1,321,741	1,893,506	2,117,613
Expected to vest, options (in shares)		643,367
Restricted Stock [Member]
Outstanding beginning balance, number of shares (in shares)		307,575	351,504	390,054
Outstanding beginning balance, weighted average exercise price (in dollars per share)		$ 182.07	$ 161.33	$ 131.63
Granted, number of shares (in shares)		194,236	201,617	162,378
Granted, weighted average exercise price (in dollars per share)		$ 185.22	$ 193.33	$ 189.23
Dividend reinvestment, number of shares (in shares)		0	0	0
Dividend reinvestment (in dollars per share)		$ 0	$ 0	$ 0
Exercised or lapsed, number of shares (in shares)		(178,602)	(205,407)	(173,726)
Exercised or lapsed, weighted average exercise price (in dollars per share)		$ 179.39	$ 157.22	$ 120.94
Canceled, expired or forfeited, number of shares (in shares)		(32,170)	(40,139)	(27,202)
Canceled, expired or forfeited, weighted average exercise price (in dollars per share)		$ 183.25	$ 182.35	$ 157.79
Outstanding ending balance, weighted average exercise price (in dollars per share)		$ 186.28	$ 182.07	$ 161.33
Outstanding ending balance, number of shares (in shares)		291,039	307,575	351,504	390,054
Outstanding ending balance, weighted average exercise price (in dollars per share)		$ 186.28	$ 182.07	$ 161.33	$ 131.63
Outstanding ending balance, number of shares (in shares)		291,039	307,575	351,504
Expected, number of shares (in shares)		252,146
Performance Shares [Member]
Outstanding beginning balance, number of shares (in shares)		199,494	163,123	145,609
Outstanding beginning balance, weighted average exercise price (in dollars per share)		$ 195.34	$ 192.99	$ 170.75
Granted, number of shares (in shares)		48,486	111,333	59,144
Granted, weighted average exercise price (in dollars per share)		$ 212.86	$ 168.63	$ 210.07
Dividend reinvestment, number of shares (in shares)		1,142	1,371	980
Exercised or lapsed, number of shares (in shares)		(45,997)	(54,927)	(42,610)
Exercised or lapsed, weighted average exercise price (in dollars per share)		$ 192.93	$ 174.42
Canceled, expired or forfeited, number of shares (in shares)		(21,889)	(21,406)	0
Canceled, expired or forfeited, weighted average exercise price (in dollars per share)			$ 202.55	$ 0
Outstanding ending balance, weighted average exercise price (in dollars per share)		$ 199.62	$ 195.34	$ 192.99
Outstanding ending balance, number of shares (in shares)		181,236	199,494	163,123	145,609
Outstanding ending balance, weighted average exercise price (in dollars per share)		$ 199.62	$ 195.34	$ 192.99	$ 170.75
Outstanding ending balance, number of shares (in shares)		181,236	199,494	163,123
Expected, number of shares (in shares)	[1]	223,629

[1]Includes estimated performance achievement

Note 17 - Compensation Plans _2

Note 17 - Compensation Plans - Stock Options Granted Weighted Average Assumptions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Expected volatility	27.28%	25.33%	23.66%
Risk-free interest rate	3.77%	1.55%	0.39%
Expected term in years (Year)	4 years	4 years 2 months 12 days	4 years 3 months 18 days
Dividend yield	0.66%	0.60%	0.63%
Weighted average grant date fair value per stock option (in dollars per share)	$ 48.14	$ 42.25	$ 35.15

Note 17 - Compensation Plans _3

Note 17 - Compensation Plans - Summary of Nonvested Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Nonvested balance (in shares)	1,321,741	1,893,506	2,117,613
Nonvested balance, Weighted Average Grant-Date Fair Value Per Share (in dollars per share)	$ 34.65	$ 28.49	$ 23.39
Number of options, granted (in shares)	211,945	653,802	750,822
Granted, Weighted Average Grant-Date Fair Value Per Share (in dollars per share)	$ 52.69	$ 42.25	$ 35.15
Number of options, vested (in shares)	(540,993)	(964,156)	(825,850)
Vested, Weighted Average Grant-Date Fair Value Per Share (in dollars per share)	$ 33.08	$ 22.97	$ 21.62
Number of options, cancelled or expired (in shares)	(227,436)	(261,411)	(149,079)
Cancelled or expired, Weighted Average Grant-Date Fair Value Per Share (in dollars per share)	$ 38.03	$ 35.23	$ 27.54
Nonvested balance (in shares)	765,257	1,321,741	1,893,506
Nonvested balance, Weighted Average Grant-Date Fair Value Per Share (in dollars per share)	$ 39.74	$ 34.65	$ 28.49

Note 18 - Pension and Postret_3

Note 18 - Pension and Postretirement Benefits (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Mar. 31, 2023	Dec. 31, 2019
Defined Benefit Plan, Prescription Drug Benefit, Accumulated Postretirement Benefit Obligation, Decrease for Subsidy	$ 1,000,000	$ 800,000
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	7.75%
Defined Benefit Plan Ultimate Health Care Cost Decreasing Trend Rate	4.50%
Defined Benefit Plan, Prescription Drug Benefit, Net Periodic Postretirement Benefit Cost, (Increase) Decrease for Subsidy	$ 118,100	$ 80,700	$ 75,800
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100%
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	100%	100%
Equity Securities [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	40%	45%		40%
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	40%	41.40%
Debt Securities [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	60%	55%		60%
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	53.50%	52.90%
Debt Securities [Member] \| Veba [Member]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage		100%			100%
Pension Plan And Supplemental Cash Balance Plan [Member]
Defined Benefit Plan, Prescription Drug Benefit, Accumulated Postretirement Benefit Obligation, Decrease for Subsidy	$ 1,700,000	$ 800,000
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 1,000,000
Pension Plan and SERP Plan [Member]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets	6.25%	6.25%	6.50%

Note 18 - Pension and Postret_4

Note 18 - Pension and Postretirement Benefits - Summary of Changes in Benefit Obligations and Plan Assets Amount Recognized (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair value of plan assets at January 1		$ 414.2
Fair value of plan assets at December 31		434	$ 414.2
Pension Plan and SERP Plan [Member]
Benefit obligation		330.9	431.7
Interest cost		17.1	14.7	$ 11
Actuarial (gain) loss		(0.8)	(86.6)
Plan participants’ contributions		0	0
Benefits paid		(29.4)	(28.9)
Benefit obligation		317.8	330.9	431.7
Accumulated benefit obligation at December 31		317.8	330.9
Fair value of plan assets at January 1		406.3	546.2
Actuarial gain (loss)		47.3	(111.8)
Employer contributions, net		1.7	0.8
Plan participants’ contributions		0	0
Benefits paid		(29.4)	(28.9)
Fair value of plan assets at December 31		425.9	406.3	546.2
Funded status at December 31		(108.1)	(75.4)
Pension assets, noncurrent (1)	[1]	(117.4)	(85.6)
Pension, SERP and postretirement benefits, current (2)	[2]	1	0.8
Pension, SERP and postretirement benefits, noncurrent (3)	[3]	8.3	9.4
Total Pension, SERP and Postretirement benefits		(108.1)	(75.4)
Other Postretirement Benefits Plan [Member]
Benefit obligation		4.2	6
Interest cost		0.2	0.1	0.1
Actuarial (gain) loss		1.1	(0.4)
Plan participants’ contributions		1.3	1.3
Benefits paid		(2.7)	(2.8)
Benefit obligation		4.1	4.2	6
Accumulated benefit obligation at December 31
Fair value of plan assets at January 1		7.6	9.5
Actuarial gain (loss)		0.4	(1.1)
Employer contributions, net		1.5	0.7
Plan participants’ contributions		1.3	1.3
Benefits paid		(2.7)	(2.8)
Fair value of plan assets at December 31		8.1	7.6	$ 9.5
Funded status at December 31		(4)	(3.4)
Pension assets, noncurrent (1)	[1]	(4)	(3.4)
Pension, SERP and postretirement benefits, current (2)	[2]	0	0
Pension, SERP and postretirement benefits, noncurrent (3)	[3]	0	0
Total Pension, SERP and Postretirement benefits		$ (4)	$ (3.4)

[1]Included in "Other noncurrent assets" in our accompanying consolidated balance sheets[2]Included in "Accounts payable and accrued liabilities" in our accompanying consolidated balance sheets[3]Included in "Other noncurrent liabilities" in our accompanying consolidated balance sheets

Note 18 - Pension and Postret_5

Note 18 - Pension and Postretirement Benefits - Summary of Pre-tax Components of Accumulated Other Comprehensive Losses (Details) - USD ($) $ in Millions		Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021
Fair value of plan assets		$ 434		$ 414.2
Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets		139.7		136.5
Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		294.3		277.7
Managed Equity Accounts [Member]
Fair value of plan assets	[1]	131.6		128.8
Managed Equity Accounts [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	[1]	131.6		128.8
Managed Equity Accounts [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	[1]	0		0
Equity - Pooled Separate Account [Member]
Fair value of plan assets	[2]	38.6		39.7
Equity - Pooled Separate Account [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	[2]	0		0
Equity - Pooled Separate Account [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	[2]	38.6		39.7
Fixed Income Manager - Separately Managed Accounts [Member]
Fair value of plan assets	[3]	138.9		133.6
Fixed Income Manager - Separately Managed Accounts [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	[3]	0		0
Fixed Income Manager - Separately Managed Accounts [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	[3]	138.9		133.6
Fixed Income Manager - Pooled Separate Accounts [Member]
Fair value of plan assets		89.2	[2]	81.5	[4]
Fixed Income Manager - Pooled Separate Accounts [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets		0	[2]	0	[4]
Fixed Income Manager - Pooled Separate Accounts [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		89.2	[2]	81.5	[4]
Fixed Income Manager - Government Securities [Member]
Fair value of plan assets		8.1	[4]	7.7	[2]
Fixed Income Manager - Government Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets		8.1	[4]	7.7	[2]
Fixed Income Manager - Government Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets		0	[4]	0	[2]
Cash - Pooled Separate Account [Member]
Fair value of plan assets	[2]	5.2		2.7
Cash - Pooled Separate Account [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	[2]	0		0
Cash - Pooled Separate Account [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	[2]	5.2		2.7
Global Real Estate [Member]
Fair value of plan assets	[5]	22.4		20.2
Global Real Estate [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets	[5]	0		0
Global Real Estate [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets	[5]	22.4		20.2
Pension Plan and SERP Plan [Member]
Prior service benefit cost		2.4		2.6
Actuarial losses		118.3		147.8
Accumulated other comprehensive losses, pretax		120.7		150.4
Fair value of plan assets		425.9		406.3		$ 546.2
Other Postretirement Benefits Plan [Member]
Prior service benefit cost		0		0
Actuarial losses		3.6		3.2
Accumulated other comprehensive losses, pretax		3.6		3.2
Fair value of plan assets		$ 8.1		$ 7.6		$ 9.5

[1]Valued at the closing price of shares for domestic stocks within the managed equity accounts, and valued at the net asset value (“NAV”) of shares for mutual funds at either the closing price reported in the active market or based on yields currently available on comparable securities of issuers with similar credit ratings for corporate bonds held by the Pension Plan in these managed accounts.[2]The pooled separate accounts invest in domestic and foreign stocks, bonds and mutual funds. The fair values of these stocks, bonds and mutual funds are publicly quoted and are used in determining the NAV of the pooled separate account, which is not publicly quoted.[3]The separately managed accounts invest in U.S. Treasury Bonds and U.S. Treasury Separate Trading of Registered Interest and Principal of Securities (“UST STRIPS”). The fair values of these bonds and UST STRIPS are publicly quoted and are used in determining the NAV of the separately managed account, which is not publicly quoted.[4]The fund invested in the U.S. government, its agencies or instrumentalities or securities that are rated AAA by S&P, AAA by Fitch, or Aaa by Moody’s, including but not limited to mortgage securities such as agency and non-agency collateralized mortgage obligations, and other obligations that are secured by mortgages or mortgage backed securities, and valued at the closing price reported in the active market.[5]The funds invested in common stocks and other equity securities issued by domestic and foreign real estate companies, including real estate investment trusts ("REIT") and similar REIT-like entities. The fair values of these stocks, bonds and mutual funds are publicly quoted and are used in determining the NAV of the funds, which is not publicly quoted.

Note 18 - Pension and Postret_6

Note 18 - Pension and Postretirement Benefits - Components of Net Periodic Benefit Cost and Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Plan and SERP Plan [Member]
Interest cost	$ 17.1	$ 14.7	$ 11
Expected return on plan assets	(24.1)	(28.2)	(32.8)
Amortization of prior service cost (credit) reclassified from accumulated other comprehensive income	0.2	0.2	0.2
Amortization of net actuarial loss reclassified from accumulated other comprehensive income	5.2	4	3.8
Net periodic (credit) benefit cost	(1.6)	(9.3)	(17.8)
Less: Amortization of prior service (cost) credit reclassified from accumulated other comprehensive income	(0.2)	(0.2)	(0.2)
Less: Amortization of actuarial loss reclassified from accumulated other comprehensive losses	(0.1)	(0.2)	(0.2)
Less: Net loss recognized reclassified from accumulated other comprehensive losses	(5.1)	(3.8)	(3.6)
Actuarial (gain) loss	(24.3)	53.5	(31.1)
Total recognized in other comprehensive income	(29.7)	49.3	(35.1)
Total recognized in net periodic benefit credit and other comprehensive (income) loss	(31.3)	40	(52.9)
Other Postretirement Benefits Plan [Member]
Interest cost	0.2	0.1	0.1
Expected return on plan assets	(0.1)	(0.2)	(0.2)
Amortization of prior service cost (credit) reclassified from accumulated other comprehensive income	0	0	(0.1)
Amortization of net actuarial loss reclassified from accumulated other comprehensive income	0.4	0.2	0.2
Net periodic (credit) benefit cost	0.5	0.1	0
Less: Amortization of prior service (cost) credit reclassified from accumulated other comprehensive income	0	0	0.1
Less: Amortization of actuarial loss reclassified from accumulated other comprehensive losses	0	0	0
Less: Net loss recognized reclassified from accumulated other comprehensive losses	(0.4)	(0.2)	(0.2)
Actuarial (gain) loss	0.8	1	(0.5)
Total recognized in other comprehensive income	0.4	0.8	(0.6)
Total recognized in net periodic benefit credit and other comprehensive (income) loss	$ 0.9	$ 0.9	$ (0.6)

Note 18 - Pension and Postret_7

Note 18 - Pension and Postretirement Benefits - Summary of Weighted-average Assumptions Used in Calculating Net Periodic Benefit (Credit) Cost (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Plan and SERP Plan [Member]
Discount rate	5.37%	5.49%
Expected return on plan assets	6.50%	6.25%
Cash balance interest credit rate	4.43%	2.57%
Discount rate	5.48%	2.75%	2.49%
Expected return on plan assets	6.25%	6.25%	6.50%
Cash balance interest credit rate	4.43%	2.57%	2.57%
Other Postretirement Benefits Plan [Member]
Discount rate	4.75%	5.25%
Expected return on plan assets	1.75%	1.75%
Discount rate	5.25%	2.25%	1.50%
Expected return on plan assets	1.75%	1.75%	2%

Note 18 - Pension and Postret_8

Note 18 - Pension and Postretirement Benefits - Summary of Estimated Future Benefit Payments for Respective Plans (Details) $ in Millions	Dec. 31, 2023 USD ($)
Pension Plan and SERP Plan [Member]
2024, gross benefit amount	$ 29.4
2025, gross benefit amount	28.9
2026, gross benefit amount	28.4
2027, gross benefit amount	28.4
2028, gross benefit amount	27
2029 and thereafter, gross benefit amount	123.3
Other Postretirement Benefits Plan [Member]
2024, gross benefit amount	0.8
2024, Medicare subsidy payments	(0.1)
2024, Net benefit amount	0.7
2025, gross benefit amount	0.7
2025, Medicare subsidy payments	0
2025, Net benefit amount	0.7
2026, gross benefit amount	0.6
2026, Medicare subsidy payments	0
2026, Net benefit amount	0.6
2027, gross benefit amount	0.5
2027, Medicare subsidy payments	0
2027, Net benefit amount	0.5
2028, gross benefit amount	0.4
2028, Medicare subsidy payments	0
2028, Net benefit amount	0.4
2029 and thereafter, gross benefit amount	1.4
2029 and thereafter, Medicare subsidy payments	0
2029 and thereafter, Net benefit amount	$ 1.4

Note 18 - Pension and Postret_9

Note 18 - Pension and Postretirement Benefits - Summary of Asset Allocation and Target Allocation (Details)	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Target Allocation	100%
Percentage of Plan Assets	100%		100%
Equity Securities [Member]
Target Allocation	40%	40%	45%
Percentage of Plan Assets	40%		41.40%
Debt Securities [Member]
Target Allocation	60%	60%	55%
Percentage of Plan Assets	53.50%		52.90%
Real Estate [Member]
Target Allocation	0%
Percentage of Plan Assets	5.30%		5%
Other Contract [Member]
Target Allocation	0%
Percentage of Plan Assets	1.20%		0.70%

Note 19 - Segment Reporting - R

Note 19 - Segment Reporting - Revenue and EBITDA by Reportable Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues	$ 2,681.4	$ 2,497	$ 2,462.5
Cost of revenues (exclusive of items shown separately below)	(876.5)	(824.6)	(853.7)
Selling, general and administrative	(391.8)	(381.5)	(313.2)
Other operating gain (loss)	0	354.2	(134)
Investment income (loss)	11	(5.3)	2.1
EBITDA from discontinued operations of the Energy business	0	(117.9)	222.3
EBITDA	1,424.1	1,521.9	1,386
EBITDA from discontinued operations of the Energy business	0	117.9	(222.3)
Depreciation and amortization of fixed assets	(206.8)	(164.2)	(170.3)
Amortization of intangible assets	(74.6)	(74.4)	(79.9)
Interest expense	(115.5)	(138.8)	(127)
Income before income taxes	1,027.2	1,262.4	786.5
Insurance [Member]
Revenues	2,681.4	2,437	2,206.9
Cost of revenues (exclusive of items shown separately below)	(876.5)	(781.9)	(704.4)
Selling, general and administrative	(391.8)	(347.4)	(239.1)
Other operating gain (loss)	0	0	0
Investment income (loss)	11	(4.7)	1.8
EBITDA from discontinued operations of the Energy business	0	0	0
EBITDA	1,424.1	1,303	1,265.2
EBITDA from discontinued operations of the Energy business	0	0	0
Energy and Specialized Markets [Member]
Revenues		22.4	112.8
Cost of revenues (exclusive of items shown separately below)		(19.1)	(58.9)
Selling, general and administrative		(26.7)	(44.9)
Other operating gain (loss)		450	0
Investment income (loss)		(0.4)	0.6
EBITDA from discontinued operations of the Energy business		(117.9)	222.3
EBITDA		308.3	231.9
EBITDA from discontinued operations of the Energy business		117.9	(222.3)
Financial Services [Member]
Revenues	$ 0	37.6	142.8
Cost of revenues (exclusive of items shown separately below)		(23.6)	(90.4)
Selling, general and administrative		(7.4)	(29.2)
Other operating gain (loss)		(95.8)	(134)
Investment income (loss)		(0.2)	(0.3)
EBITDA from discontinued operations of the Energy business		0	0
EBITDA		(89.4)	(111.1)
EBITDA from discontinued operations of the Energy business		$ 0	$ 0

Note 19 - Segment Reporting - L

Note 19 - Segment Reporting - Long-lived Assets By Country (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Total long-lived assets	$ 3,556	$ 6,036
UNITED STATES
Total long-lived assets	2,455.7	2,876.5
UNITED KINGDOM
Total long-lived assets	597.9	2,428.9
Other Countries [Member]
Total long-lived assets	$ 502.4	$ 730.6

Note 20 - Related Parties (Deta

Note 20 - Related Parties (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Related Party Transaction, Amounts of Transaction	$ 0	$ 0

Note 21 - Commitments and Con_2

Note 21 - Commitments and Contingencies (Details Textual) - USD ($)	Oct. 18, 2023	Feb. 08, 2023	Jan. 30, 2023	Jun. 27, 2022
Atlas Data Privacy Corp., et al. v. Verisk Analytics, Inc. [Member]
Loss Contingency, Damages Per Violation		$ 1,000
Ahringer et al. v. LoanDepot, Inc. and Verisk Analytics [Member]
Loss Contingency, Aggregate Claims of Proposed Class			$ 5,000,000
Williams v. DDR Merida, LLC and Lead Intelligence, Inc. [Member]
Loss Contingency, Damages Per Violation				$ 5,000
Government Contracts Within Former Financial Services Segment Sold to TransUnion [Member]
Loss Contingency Accrual	$ 39,000,000

Note 22 - Subsequent Events (De

Note 22 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Millions							2 Months Ended
	Feb. 14, 2024	Jan. 09, 2024	Oct. 25, 2023	Jul. 26, 2023	Apr. 25, 2023	Feb. 14, 2023	Feb. 21, 2024
Common Stock, Dividends, Per Share, Declared (in dollars per share)			$ 0.34	$ 0.34	$ 0.34	$ 0.34
Subsequent Event [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.39
Stock Repurchase Program, Additional Authorized Amount							$ 1,000
Rocket Enterprise Solutions GmbH [Member] \| Subsequent Event [Member]
Business Acquisition, Percentage of Voting Interests Acquired		100%
Business Combination, Consideration Transferred		$ 10.6
Rocket Enterprise Solutions GmbH [Member] \| Subsequent Event [Member] \| Business Acquisition, Deferred Payment [Member]
Business Combination, Consideration Transferred, Liabilities Incurred		2.2
Rocket Enterprise Solutions GmbH [Member] \| Subsequent Event [Member] \| Business Acquisition, Holdback Payment [Member]
Business Combination, Consideration Transferred, Liabilities Incurred		$ 0.3

Schedule II - Valuation and Q_3

Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Balance		$ 14.3	$ 15.4	$ 14.1
Charged to Expenses / Against Revenue	[1]	8.7	6.4	13.8
Deductions - Write-offs	[2]	(7.9)	(7.5)	(12.5)
Balance		15.1	14.3	15.4
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
Balance		45.3	38.3	30.6
Charged to Expenses / Against Revenue	[1]	1.2	41.2	8.1
Deductions - Write-offs	[2]	(40.9)	(34.2)	(0.4)
Balance		$ 5.6	$ 45.3	$ 38.3

[1]Primarily additional reserves for bad debts[2]Primarily accounts receivable balances written off, net of recoveries, the expiration of loss carryforwards, and businesses held for sale