Verisk Analytics (VRSK) 10-Q 31 Oct 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 27, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Trading Symbol	VRSK
Entity Registrant Name	Verisk Analytics, Inc.
Entity Central Index Key	1,442,145
Current Fiscal Year End Data	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		164,691,912

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 142	$ 135.1
Available-for-sale securities	3.7	3.4
Accounts receivable, net of allowance for doubtful accounts of $4.7 and $3.4, respectively	285.8	263.9
Prepaid expenses	42.4	28.9
Income taxes receivable	34.3	49.3
Other current assets	36.5	20.3
Total current assets	544.7	500.9
Noncurrent assets:
Fixed assets, net	437.8	380.3
Intangible assets, net	1,256.2	1,010.8
Goodwill	3,188.8	2,578.1
Deferred income tax assets	16.9	15.6
Other assets	183.8	145.5
Total assets	5,628.2	4,631.2
Current liabilities:
Accounts payable and accrued liabilities	210.2	184
Short-term debt and current portion of long-term debt	602.9	106.8
Deferred revenues	390	330.8
Total current liabilities	1,203.1	621.6
Noncurrent liabilities:
Long-term debt	2,278.8	2,280.2
Deferred income taxes, net	384.1	322.2
Other liabilities	89.6	74.8
Total liabilities	3,955.6	3,298.8
Commitments and contingencies
Stockholders’ equity:
Common stock, $.001 par value; 2,000,000,000 shares authorized; 544,003,038 shares issued and 164,516,754 and 166,915,772 shares outstanding, respectively	0.1	0.1
Additional paid-in capital	2,165.8	2,121.6
Treasury stock, at cost, 379,486,284 and 377,087,266 shares, respectively	(3,153.4)	(2,891.4)
Retained earnings	3,103.4	2,752.9
Accumulated other comprehensive losses	(443.3)	(650.8)
Total stockholders’ equity	1,672.6	1,332.4
Total liabilities and stockholders’ equity	$ 5,628.2	$ 4,631.2

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 4.7	$ 3.4
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)	164,516,754	166,915,772
Treasury stock (in shares)	379,486,284	377,087,266

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenues	$ 549.1	$ 498.1	$ 1,574.9	$ 1,489.1
Expenses:
Cost of revenues (exclusive of items shown separately below)	198.5	169.7	575.1	521.4
Selling, general and administrative	80.9	77.8	235.6	224.4
Depreciation and amortization of fixed assets	33.8	29.5	99.4	90.7
Amortization of intangible assets	27.5	22.7	73.6	70.4
Total expenses	340.7	299.7	983.7	906.9
Operating income	208.4	198.4	591.2	582.2
Other income (expense):
Investment income and others, net	2.6	2.1	7.9	3
Interest expense	(30.3)	(28.1)	(87.3)	(91.7)
Total other expense, net	(27.7)	(26)	(79.4)	(88.7)
Income from continuing operations before income taxes	180.7	172.4	511.8	493.5
Provision for income taxes	(60)	(44.8)	(161.3)	(149.5)
Income from continuing operations	120.7	127.6	350.5	344
Income from discontinued operations	0	0	0	256.5
Provision for income taxes from discontinued operations	0	0	0	(118.6)
Income from discontinued operations	0	0	0	137.9
Net income	$ 120.7	$ 127.6	$ 350.5	$ 481.9
Basic net income per share:
Income from continuing operations (in dollars per share)	$ 0.73	$ 0.76	$ 2.12	$ 2.04
Income from discontinued operations (in dollars per share)	0	0	0	0.82
Basic net income per share (in dollars per share)	0.73	0.76	2.12	2.86
Diluted net income per share:
Income from continuing operations (in dollars per share)	0.72	0.74	2.08	2.01
Income from discontinued operations (in dollars per share)	0	0	0	0.80
Diluted net income per share (in dollars per share)	$ 0.72	$ 0.74	$ 2.08	$ 2.81
Weighted average shares outstanding:
Basic (in shares)	164,577,575	168,874,129	165,314,267	168,541,399
Diluted (in shares)	167,957,058	171,785,900	168,807,405	171,495,189

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 120.7	$ 127.6	$ 350.5	$ 481.9
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	82.2	(62.1)	204.9	(278.6)
Unrealized holding gain on available-for-sale securities	0	0.1	0.2	0.3
Pension and postretirement liability adjustment	0.9	0.2	2.4	1.4
Total other comprehensive income (loss)	83.1	(61.8)	207.5	(276.9)
Comprehensive income	$ 203.8	$ 65.8	$ 558	$ 205

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Par Value	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Losses	Common Stock Issued
Beginning balance (in shares) at Dec. 31, 2015							544,003,038
Beginning balance at Dec. 31, 2015	$ 1,372	$ 0.1	$ 2,023.4	$ (2,571.2)	$ 2,161.7	$ (242)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	591.2				591.2
Other comprehensive gain (loss)	(408.8)					(408.8)
Treasury stock acquired	(333.3)			(333.3)
KSOP shares earned	14.5		13.2	1.3
Stock options exercised, including tax benefit	66.4		56.2	10.2
Restricted stock lapsed, including tax benefit	1.2			1.2
Employee stock purchase plan	2.3		2.1	0.2
Stock based compensation	29.9		29.9
Net share settlement of restricted stock awards	(3.1)		(3.1)
Other stock issuances	$ 0.1		(0.1)	0.2
Ending balance (in shares) at Dec. 31, 2016	544,003,038						544,003,038
Ending balance at Dec. 31, 2016	$ 1,332.4	0.1	2,121.6	(2,891.4)	2,752.9	(650.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	350.5				350.5
Other comprehensive gain (loss)	207.5					207.5
Treasury stock acquired	(269.8)			(269.8)
Stock options exercised, including tax benefit	28.8		22.5	6.3
Restricted stock lapsed, including tax benefit			(1.1)	1.1
Employee stock purchase plan	1.9		1.7	0.2
Stock based compensation	24.2		24.2
Net share settlement of restricted stock awards	$ (2.9)		(2.9)
Other stock issuances			(0.2)	0.2
Ending balance (in shares) at Sep. 30, 2017	544,003,038						544,003,038
Ending balance at Sep. 30, 2017	$ 1,672.6	$ 0.1	$ 2,165.8	$ (3,153.4)	$ 3,103.4	$ (443.3)

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Treasury stock, shares acquired (in shares)	3,356,360	4,325,548
Tax benefit of stock options exercised	$ 0	$ 22.1
Shares reissued from treasury stock (in shares)	773,206	1,409,803
Other stock issuances (in shares)	18,784	26,106
KSOP
Shares issued in period (in shares)	0	181,198
Restricted stock
Tax benefit of stock options exercised	$ 0	$ 1.2
Shares reissued from treasury stock (in shares)	141,961	169,365
Shares withheld from settlement (in shares)	36,067	38,250
Employee stock purchase plan
Shares reissued from treasury stock (in shares)	23,391	29,867

Condensed Consolidated Stateme8

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 350.5	$ 481.9
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of fixed assets	99.4	97.7
Amortization of intangible assets	73.6	76.3
Amortization of debt issuance costs and original issue discount	3.1	4
Allowance for doubtful accounts	1.4	1.5
KSOP stock based compensation expense	0	11.4
Stock based compensation	24.2	23.8
Gain on sale of discontinued operations	0	(269.4)
Realized (gain) loss on available-for-sale securities, net	(0.1)	0.3
Gain on exercise of common stock warrants	0	(1.5)
Deferred income taxes	(4.1)	(1.7)
Loss on disposal of fixed assets, net	0	0.9
Changes in assets and liabilities, net of effects from acquisitions:
Accounts receivable	4	32.6
Prepaid expenses and other assets	(26.4)	(22.4)
Income taxes	14.1	45.3
Accounts payable and accrued liabilities	21.7	(7.2)
Deferred revenues	47.2	14.7
Other liabilities	(16.5)	(3.8)
Net cash provided by operating activities	592.1	484.4
Cash flows from investing activities:
Acquisitions, net of cash acquired of $22.1 and $1.0, respectively	(674.3)	(45.2)
Purchase of equity method investments in non-public companies	(5)	0
Sale of non-controlling equity investments in non-public companies	0	8.5
Proceeds from sale of discontinued operations	0	719.4
Escrow funding associated with acquisitions	(30.9)	(4.4)
Capital expenditures	(113.8)	(98.6)
Purchases of available-for-sale securities	(0.3)	(0.2)
Proceeds from sales and maturities of available-for-sale securities	0.4	0.4
Other investing activities, net	0	(0.6)
Net cash (used in) provided by investing activities	(823.9)	579.3
Cash flows from financing activities:
Proceeds (repayment) of short-term debt, net	40	(870)
Proceeds from issuance of short-term debt with original maturities greater than three months	455	0
Repurchases of common stock	(276.2)	(182.5)
Payment of debt issuance costs	(0.5)	(0.5)
Net share settlement of restricted stock awards	(2.9)	(3.1)
Proceeds from stock options exercised	26	32.6
Other financing activities, net	(7.1)	(4.4)
Net cash provided by (used in) financing activities	234.3	(1,027.9)
Effect of exchange rate changes	4.4	(9.4)
Increase in cash and cash equivalents	6.9	26.4
Cash and cash equivalents, beginning of period	135.1	138.3
Cash and cash equivalents, end of period	142	164.7
Supplemental disclosures:
Income taxes paid	150.6	221.4
Interest paid	68.8	75.8
Noncash investing and financing activities:
Repurchases of common stock included in accounts payable and accrued liabilities	0	7.3
Deferred tax liability established on date of acquisition	53.2	3.8
Tenant improvement included in other liabilities	0	0.1
Capital lease obligations	4.2	11.5
Capital expenditures included in accounts payable and accrued liabilities	1.3	2.3
Promissory note [Member]
Noncash investing and financing activities:
Amount of consideration received	0	82.9
Equity Securities [Member]
Noncash investing and financing activities:
Amount of consideration received	$ 0	$ 8.4

Condensed Consolidated Stateme9

Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Cash Flows [Abstract]
Cash acquired from acquisition	$ 22.1	$ 1

Organization

Organization	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Organization	Organization: Verisk Analytics, Inc. and its consolidated subsidiaries (“Verisk” or the “Company”) enable risk-bearing businesses to better understand and manage their risks. The Company provides its customers proprietary data that, combined with analytic methods, create embedded decision support solutions. The Company is one of the largest aggregators and providers of data pertaining to property and casualty (“P&C”) insurance risks in the United States of America (“U.S.”). The Company offers predictive analytics and decision support solutions to customers in rating, underwriting, claims, catastrophe and weather risk, global risk analytics, natural resources intelligence, economic forecasting, and many other fields. Verisk was established to serve as the parent holding company of Insurance Services Office, Inc. (“ISO”) upon completion of the initial public offering ("IPO"), which occurred on October 9, 2009. ISO was formed in 1971 as an advisory and rating organization for the P&C insurance industry to provide statistical and actuarial services, to develop insurance programs and to assist insurance companies in meeting state regulatory requirements. For over the past decade, the Company has broadened its data assets, entered new markets, placed a greater emphasis on analytics, and pursued strategic acquisitions. Verisk trades under the ticker symbol “VRSK” on the NASDAQ Global Select Market.

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies: The accompanying unaudited condensed consolidated financial statements have been prepared on the basis of accounting principles generally accepted in the U.S. (“U.S. GAAP”). The preparation of financial statements in conformity with these accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and 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 stock options granted, and assets and liabilities for pension and postretirement benefits. Actual results may ultimately differ from those estimates. The condensed consolidated financial statements as of September 30, 2017 and for the three and nine months ended September 30, 2017 and 2016 , in the opinion of management, include all adjustments, consisting of normal recurring items, to present fairly the Company’s financial position, results of operations and cash flows. The operating results for the three and nine months ended September 30, 2017 are not necessarily indicative of the results to be expected for the full year. The condensed consolidated financial statements and related notes for the three and nine months ended September 30, 2017 have been prepared on the same basis as and should be read in conjunction with the annual report on Form 10-K for the year ended December 31, 2016 . Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the rules of the Securities and Exchange Commission (“SEC”). The Company believes the disclosures made are adequate to keep the information presented from being misleading. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers (“Topic 606”). Topic 606 replaces numerous requirements in U.S. GAAP, including industry-specific requirements, and provides companies with a single revenue recognition model for recognizing revenue from contracts with customers. The core principle of Topic 606 is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The two permitted transition methods under Topic 606 are the full retrospective method, in which case the standard would be applied to each prior reporting period presented and the cumulative effect of applying the standard would be recognized at the earliest period shown, or the modified retrospective method, in which case the cumulative effect of applying the standard would be recognized at the date of initial application. In July 2015, the FASB approved the deferral of Topic 606's effective date by one year. Topic 606 is effective for annual reporting periods beginning after December 15, 2017. The FASB permits companies to adopt Topic 606 early, but not before the original effective date of the annual reporting periods beginning after December 15, 2016. The Company established a corporate implementation team, which engages with cross-functional representatives from all of its business verticals. The Company utilized a bottom-up approach, with the assistance of third party specialists, to analyze the impact of the standard on the contract portfolio by reviewing current accounting policies and practices to identify potential differences that would result from applying the requirements of Topic 606 to revenue contracts. In addition, the Company identified and is in the process of implementing appropriate changes to its business processes, systems, and controls to support recognition and disclosure under Topic 606. The Company is currently planning to adopt Topic 606 using the modified retrospective approach and is in the process of evaluating the impact of adopting Topic 606 on its condensed consolidated financial statements. The Company’s revenue streams primarily consist of subscription services provided through a hosted environment or by delivering term based software as well as other services including consulting and transactional solutions. Based on a preliminary assessment, the analysis of the contract portfolio under Topic 606 results in the revenue for the majority of the Company's customer contracts being recognized over time, as the Company offers most of its solutions through a series of services primarily in a hosted environment, which is consistent with the Company's current revenue recognition model. For the majority of its contracts, there is continuous transfer of control to the customer and the number of performance obligations under Topic 606 is consistent with those identified under the existing standard. The Company is also closely reviewing its licensing revenue streams to determine whether the nature of a promise in granting a license is to provide a right to access the Company’s intellectual property, which is satisfied over time and for which revenue is recognized over time, or to provide a right to use the Company’s intellectual property, which is satisfied at a point in time and for which revenue is recognized at a point in time. An identified impact of adopting Topic 606 relates to the deferral of commissions on revenue contracts, which are currently expensed as incurred but under Topic 606 the majority of such commissions will likely be capitalized and amortized over a period of time. The Company expects that a major portion of its commission expenses for sales employees will be capitalized and will be subject to an amortization period of up to five years. The Company's commission expense is about 1.2% and 1.0% of its total expenses, for the nine months ended September 30, 2017 and for the year ended December 31, 2016, respectively. In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting (“ASU No. 2016-09”). The objective of this update is to simplify several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The Company adopted the guidance prospectively for the income statement impact of income taxes and has retrospectively applied the guidance to the condensed consolidated statements of cash flows for the impact of excess tax benefits on January 1, 2017 in accordance with ASU No. 2016-09. The presentation requirements for cash flows related to employee taxes paid for withheld shares had no impact to any of the periods presented in the condensed consolidated statements of cash flows, since such cash flows have historically been presented in financing activities. The treatment of forfeitures has not changed as the Company is electing to continue the current process of estimating the number of forfeitures. Accordingly, excess tax benefits from exercised stock options in 2017 were recorded as income tax benefit in the condensed consolidated statements of operations and presented as an operating activity on the condensed consolidated statements of cash flows for the nine months ended September 30, 2017 . There was no cumulative-effect adjustment required to retained earnings under the prospective method as of the beginning of the year because all tax benefits had been previously recognized when the tax deductions related to stock compensation were utilized to reduce tax payable. The Company did not record any deferred tax assets or tax liabilities as the result of the adoption of ASU 2016-09. In May 2017, the FASB issued ASU No. 2017-09, Scope of Modification Accounting ("ASU 2017-09"), that clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. Under the guidance within this update, a company will not apply modification accounting to a share-based payment award if all of the following are the same immediately before and after the change: • The award’s fair value (or calculated value or intrinsic value, if those measurement methods are used) • The award’s vesting conditions • The award’s classification as an equity or liability instrument. ASU No. 2017-09 is effective for annual periods beginning after December 15, 2017, including interim periods within those periods. The amendments in this update should be applied prospectively to an award modified on or after the effective date. The Company will evaluate the impact of ASU No. 2017-09 for future award changes subsequent to the effective date.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements: Certain assets and liabilities of the Company are reported at fair value in the accompanying condensed consolidated balance sheets. To increase consistency and comparability of assets and liabilities recorded at fair value, ASC 820-10, Fair Value Measurements (“ASC 820-10”), established a three-level fair value hierarchy to prioritize the inputs to valuation techniques used to measure fair value. ASC 820-10 requires disclosures detailing the extent to which companies measure assets and liabilities at fair value, the methods and assumptions used to measure fair value and the effect of fair value measurements on earnings. In accordance with ASC 820-10, the Company applied the following fair value hierarchy: Level 1 - Assets or liabilities for which the identical item is traded on an active exchange, such as publicly-traded instruments. Level 2 - Assets and liabilities valued based on observable market data for similar instruments. Level 3 - Assets or liabilities for which significant valuation assumptions are not readily observable in the market; instruments valued based on the best available data, some of which are internally-developed, and considers risk premiums that market participants would require. The fair values of cash and cash equivalents, accounts receivable, securities accounted for under ASC 323-10-25, accounts payable and accrued liabilities, and short-term debt approximate their carrying amounts because of the short-term nature of these instruments. The following table summarizes fair value measurements by level for cash equivalents and registered investment companies that were measured at fair value on a recurring basis: Quoted Prices in Active Markets for Identical Assets (Level 1) September 30, 2017 Registered investment companies (1) $ 3.7 December 31, 2016 Registered investment companies (1) $ 3.4 ______________________ (1) Registered investment companies are classified as available-for-sale securities and are valued using quoted prices in active markets multiplied by the number of shares owned. The Company has not elected to carry its subordinated promissory note receivable and long-term debt at fair value. The carrying value of the subordinated promissory note receivable represents amortized cost and has been included in "Other assets" in the accompanying condensed consolidated balance sheets. The carrying value of the long-term debt represents amortized cost less unamortized discount and debt issuance costs. The Company assesses the fair value of these financial instruments based on an estimate of interest rates available to the Company for financial instruments with similar features, the Company’s current credit rating and spreads applicable to the Company. The following table summarizes the carrying value and estimated fair value of these financial instruments as of September 30, 2017 and December 31, 2016 , respectively: 2017 2016 Fair Value Hierarchy Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial instruments not carried at fair value: Subordinated promissory note receivable Level 2 $ 94.8 $ 84.9 $ 84.1 $ 76.8 Long-term debt excluding capitalized Level 2 $ 2,279.8 $ 2,456.7 $ 2,277.3 $ 2,402.6

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Acquisitions	Acquisitions: 2017 Acquisitions On January 21, 2017, the Company acquired 100 percent of the stock of Arium Limited ("Arium") for a net cash purchase price of $1.9 million . Arium specializes in liability risk modeling and decision support. Arium has become part of the insurance vertical within the Decision Analytics segment, and enables the Company to provide its customers with additional modeling solutions and analytics for the casualty market. The preliminary purchase price allocation of the acquisition is presented as part of "Others" in the table below. On February 16, 2017, the Company acquired 100 percent of the stock of Healix International Holdings Limited (“Healix”), a software analytics provider in automated medical risk assessment for the travel insurance industry, for a net cash purchase price of $52.4 million , of which $7.5 million represents indemnity escrows. Healix is within the Company's Risk Assessment segment. The acquisition further expands the Company's offerings for the global insurance industry, providing solutions that are embedded with customer workflows and can help underwrite medical coverage for travelers with greater speed, accuracy, and efficiency. The preliminary purchase price allocation of the acquisition is presented in the table below. On February 24, 2017, the Company acquired 100 percent of the stock of Emergent Network Intelligence Limited (“ENI”), a developer in insurance claims efficiency and fraud detection solutions based in the United Kingdom ("U.K."), for a net cash purchase price of $6.1 million , of which $0.5 million represents indemnity escrows. With the acquisition of ENI within the Decision Analytics segment, the Company's customers in the U.K. can take advantage of technologically advanced tools that allow them to improve motor vehicle claims workflow and reduce their costs and exposure to fraud. The preliminary purchase price allocation of the acquisition is presented as part of "Others" in the table below. On March 31, 2017, the Company acquired 100 percent of the stock of Fintellix Solutions Private Limited ("Fintellix"), a Bangalore-based data solutions company specializing in the development of data management platforms and regulatory reporting solutions for financial institutions, for a net cash purchase price of $16.9 million , of which $1.8 million represents indemnity escrows. Fintellix has become part of the financial services vertical within the Decision Analytics segment. The acquisition of Fintellix positions the Company to expand the data hosting and regulatory platforms and better address the increasingly complex needs of its customers. The preliminary purchase price allocation of the acquisition is presented in the table below. On May 19, 2017, the Comp any acquired 100 percent of the stock o f MAKE Consulting A/S ("MAKE"), a research and advisory business specializing in wind power, for a net cash purchase price of $16.9 million , of which $2.7 million represents indemnity escrows. MAKE has become part of the energy and specialized markets vertical within the Decision Analytics segment. MAKE enhances the Company's offering to existing customers and forms a market analysis and advisory consortium on renewables and the transformation of the global electricity industry. With detailed coverage of power market fundamentals, solar, wind, energy storage, and grid edge technologies, the energy and specialized markets vertical is positioned to bring customers market analysis and insight on the evolution of the energy landscape and provide a comprehensive platform for the future. The preliminary purchase price allocation of the acquisition is presented as part of "Others" in the table below. During the three months ended June 30, 2017, the Company acquired the net assets of Blue Skies Consulting, LLC, ControlCam, LLC, Krawietz Aerial Photography, LLC, Richard Crouse & Associates, Inc., Rocky Mountain Aerial Surveys, Inc., Skyview Aerial Photo, Inc., and Valley Air Photos, LLC (collectively referred to as "Aerial Imagery acquisitions"), a group of similar but unrelated companies, which gives the Company broad geographic coverage of the United States for aerial image capture purposes. The Aerial Imagery acquisitions provide multi-spectral aerial photographic services with expertise in offering digital photogrammetric and remote sensing data for mapping and surveying applications. The purchase consideration consists of an aggregate net cash purchase price of $28.1 million and a holdback of $3.1 million . Within the Company's Decision Analytics segment, the Aerial Imagery acquisitions enable the Company to enhance and maintain its database of images with the required frequency, resolution, and coverage across the U.S. to support the Company's objective as the leading provider of loss quantification data, analytics, and decision-support solutions to the insurance industry, the photogrammetry, surveying and mapping and other related markets. The preliminary purchase price allocation of the acquisition is presented as part of "Others" in the table below. On August 3, 2017, the Company acquired 100 percent of the stock of G2 Web Services ("G2"), a provider of merchant risk intelligence solutions for acquirers, commercial banks, and other payment system providers, for a net cash purchase price of $112.0 million , of which $5.6 million represents indemnity escrows. G2 has become part of the financial services vertical within the Decision Analytics segment. The acquisition of G2 positions the Company to further enhance its offerings to clients and partners, by providing solutions that help fight fraud, transaction laundering, and reputational risk within the global payments and e-commerce ecosystem. The preliminary purchase price allocation of the acquisition is presented in the table below. On August 23, 2017, the Company acquired 100 percent of the stock of Sequel Business Solutions Ltd. ("Sequel"), a provider of commercial and specialty insurance and reinsurance software based in the U.K., for a net cash purchase price of $320.3 million . Sequel has become part of the insurance vertical within the Decision Analytics segment. The acquisition of Sequel further enhances the Company's comprehensive offerings to the global complex commercial and specialty insurance industry, enabling integrated global data analytics through a specialized end-to-end workflow solution. The preliminary purchase price allocation of the acquisition is presented in the table below. On August 31, 2017, the Company acquired 100 percent of the stock of Lundquist Consulting, Inc. ("LCI"), a provider of risk insight, prediction, and management solutions for banks and creditors, for a net cash purchase price of $150.6 million , of which $12.8 million represents indemnity escrows. LCI has become part of the financial services vertical within the Decision Analytics segment. This acquisition brings together the Company's propriety data assets and LCI's proprietary time-series data, including consumer and commercial bankruptcies, consumer behavior, and legal and technical terms associated with debtor settlements. The preliminary purchase price allocation of the acquisition is presented in the table below. The preliminary purchase price allocations of the 2017 acquisitions resulted in the following: Healix Fintellix G2 Sequel LCI Others Total Cash and cash equivalents $ 0.9 $ 1.1 $ 1.0 $ 16.0 $ 1.1 $ 2.0 $ 22.1 Accounts receivable 0.9 2.1 3.4 9.5 3.1 2.9 21.9 Current assets — 0.9 3.6 1.4 — 0.7 6.6 Fixed assets — 0.1 6.4 7.5 5.7 11.9 31.6 Intangible assets 21.1 6.6 41.0 107.3 55.7 12.2 243.9 Goodwill 35.2 11.3 74.2 226.0 100.7 33.5 480.9 Other assets 7.5 2.0 2.8 — 12.8 3.3 28.4 Total assets acquired 65.6 24.1 132.4 367.7 179.1 66.5 835.4 Current liabilities 1.1 1.3 3.2 9.9 1.1 1.4 18.0 Deferred revenues 0.1 0.8 0.4 2.4 0.3 1.7 5.7 Deferred income taxes, net 3.6 2.2 13.0 19.1 13.2 2.1 53.2 Other liabilities 7.5 1.8 2.8 — 12.8 6.3 31.2 Total liabilities assumed 12.3 6.1 19.4 31.4 27.4 11.5 108.1 Net assets acquired 53.3 18.0 113.0 336.3 151.7 55.0 727.3 Cash acquired (0.9 ) (1.1 ) (1.0 ) (16.0 ) (1.1 ) (2.0 ) (22.1 ) Net cash purchase price $ 52.4 $ 16.9 $ 112.0 $ 320.3 $ 150.6 $ 53.0 $ 705.2 The preliminary amounts assigned to intangible assets by type for the 2017 acquisitions are summarized in the table below: Weighted Average Useful Life Total Technology-related 7 years $ 66.3 Marketing-related 8 years 15.3 Customer-related 10 years 110.0 Database-related 12 years 52.3 Total intangible assets $ 243.9 The preliminary allocations of the purchase price for the 2016 and 2017 acquisitions with less than a year ownership are subject to revisions as additional information is obtained about the facts and circumstances that existed as of each acquisition date. The revisions may have a significant impact on the condensed consolidated financial statements. The allocations of the purchase price will be finalized once all information is obtained, but not to exceed one year from the acquisition date. The primary areas of the purchase price allocation that are not yet finalized relate to operating leases, income and non-income taxes, deferred revenues, the valuation of intangible assets acquired, and residual goodwill. The preliminary amounts assigned to intangible assets by type for these acquisitions were based upon the Company's valuation model and historical experiences with entities with similar business characteristics. For the nine months ended September 30, 2017 , the Company finalized the purchase accounting for the acquisitions of RII, Greentech Media and Quest Offshore during the measurement periods in accordance with ASC 805. The impact of finalization of the purchase accounting associated with these acquisitions were not material to the accompanying condensed consolidated statements of operations for the three and nine months ended September 30, 2017 and 2016 . For the three and nine months ended September 30, 2017 , the Company incurred transaction costs related to Arium, Healix, ENI, Fintellix, MAKE, Aerial Imagery acquisitions, G2, Sequel and LCI of $3.2 million and $5.9 million , respectively. For the three and nine months ended September 30, 2016, the Company incurred transaction costs of $0.8 million and $1.0 million , respectively, related to the acquisitions of the RII, Greentech Media and Quest Offshore. The transaction costs were included within "Selling, general and administrative" expenses in the accompanying condensed consolidated statements of operations. For the 2017 acquisitions, the goodwill of $465.8 million associated with the stock purchases of Arium, Healix, ENI, Fintellix, MAKE, G2, Sequel and LCI is not deductible for tax purposes, with the exception of $19.9 million of goodwill attributable to G2. The goodwill of $15.1 million associated with the Aerial Imagery asset acquisitions is deductible for tax purposes. For the 2016 acquisitions, the goodwill of $34.9 million associated with the stock purchases of RII and Greentech Media is not deductible for tax purposes, whereas the goodwill of $6.2 million associated with the asset acquisition of Quest Offshore is deductible for tax purposes. The 2017 acquisitions were immaterial, both individually and in the aggregate, to the Company's condensed consolidated financial statements for the nine months ended September 30, 2017 and 2016 and therefore, supplemental information disclosure on an unaudited pro forma basis is not presented. Acquisition Escrows Pursuant to the related acquisition agreements, the Company has funded various escrow accounts to satisfy pre-acquisition indemnity and tax claims arising subsequent to the acquisition date, as well as a portion of the contingent payments. At September 30, 2017 and December 31, 2016 , the current portion of the escrows amounted to $19.9 million and $4.1 million , and the noncurrent portion of the escrows amounted to $22.1 million and $6.3 million , respectively. The current and noncurrent portions of the escrows have been included in “Other current assets” and "Other assets" in the accompanying condensed consolidated balance sheets, respectively.

Discontinued Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2017
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Discontinued Operations: On June 1, 2016, the Company sold 100 percent of the stock of its healthcare business, Verisk Health ("Verisk Health"), in exchange for a purchase price that consisted of $714.6 million of cash consideration after a working capital adjustment of $5.4 million , a subordinated promissory note with a face value of $100.0 million and an eight year maturity (the "Note"), and other contingent consideration (collectively, the "Sale"). Results of operations for the healthcare business are reported as a discontinued operation for the nine months ended September 30, 2016 . The Note has a stated interest rate of 9.0% per annum, increasing to 11.0% per annum at the earlier of specified refinancings or acquisitions, or the fourth anniversary of the closing of the Sale. Interest shall accrue from the closing date and on each anniversary of the Sale until the Note is paid in full on the unpaid principal amount of the Note outstanding at the interest rate in effect (computed on the basis of a 360-day year of twelve 30-day months). On each anniversary of the Sale, accrued interest shall be paid in kind by adding the amount of such accrued interest to the outstanding principal amount of the Note. The issuer of the Note may, at its option at any time prior to the maturity date, prepay any, or all, of the principal amount of the Note, plus accrued but unpaid interest as of the elected prepayment date, without any premium or penalty. There is a mandatory prepayment of the Note as a result of (i) the proceeds of a specified dividend recapitalization received by the issuer, (ii) the consummation of a change of control of the issuer, or (iii) the sale, transfer or other disposition by the parent of the issuer of more than 10.0% of the capital stock of the issuer. As of September 30, 2017 , the Company had a receivable of $94.8 million outstanding under the Note. The carrying value of the Note represents amortized cost. The fair value of the Note is based on management estimates with the assistance of valuations performed by third party specialists, discounted cash flow analysis based on current market conditions and assumptions that the Note would be paid in full at maturity, including accrued interest, with no prepayment election. Refer to Note 3 Fair Value Measurements for further discussion. The Company also received a 10.0% non-participating interest in the issuer's stock, the exercise value of which will be contingent on the parent of the issuer realizing a specified rate of return on its investment. As of September 30, 2017 , the Company had an equity investment of $8.4 million related to such interest accounted for in accordance with ASC 323-10-25, The Equity Method of Accounting for Investments in Common Stock ("ASC 323-10-25"). The value of the equity investment has been included in “Other assets” in the accompanying condensed consolidated balance sheets. The following table summarizes the results from the discontinued operation for the nine months ended September 30: Nine Months Ended September 30, 2017 2016 Revenues from discontinued operations $ — $ 112.3 Expenses: Cost of revenues (exclusive of items shown separately below) — 75.9 Selling, general and administrative — 36.6 Depreciation and amortization of fixed assets — 7.0 Amortization of intangible assets — 5.9 Total expenses — 125.4 Operating loss — (13.1 ) Other income: Gain on sale — 269.3 Investment income and others, net — 0.3 Total other income — 269.6 Income from discontinued operations before income taxes — 256.5 Provision for income taxes (included tax on gain of $118.0) — (118.6 ) Income from discontinued operations, net of tax $ — $ 137.9 Net cash provided by operating activities and net cash used in investing activities from the discontinued operation for the nine months ended September 30 are presented below: 2017 2016 Net cash provided by operating activities $ — $ 21.4 Net cash used in investing activities $ — $ (10.6 )

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets: The following is a summary of the change in goodwill from December 31, 2016 through September 30, 2017 , both in total and as allocated to the Company’s operating segments: Risk Assessment Decision Analytics Total Goodwill at December 31, 2016 (1) $ 71.3 $ 2,506.8 $ 2,578.1 Current year acquisitions 35.2 445.7 480.9 Purchase accounting reclassification (1.6 ) (2.2 ) (3.8 ) Foreign currency translation 3.2 130.4 133.6 Goodwill at September 30, 2017 (1) $ 108.1 $ 3,080.7 $ 3,188.8 ______________________ (1) These balances are net of accumulated impairment charges of $3.2 million that occurred prior to December 31, 2016 . Goodwill and intangible assets with indefinite lives are subject to impairment testing annually as of June 30, or whenever events or changes in circumstances indicate that the carrying amount may not be fully recoverable. Goodwill impairment testing compares the carrying value of each reporting unit to its fair value. If the fair value of the reporting unit exceeds the carrying value of the net assets, including goodwill assigned to that reporting unit, goodwill is not impaired. If the carrying value of the reporting unit’s net assets including goodwill exceeds the fair value of the reporting unit, then the Company will determine the implied fair value of the reporting unit’s goodwill. If the carrying value of a reporting unit’s goodwill exceeds its implied fair value, then an impairment loss is recorded for the difference between the carrying amount and the implied fair value of goodwill. The Company completed the required annual impairment test as of June 30, 2017, and concluded that there was no impairment of goodwill. The Company’s intangible assets and related accumulated amortization consisted of the following: Weighted Average Useful Life Cost Accumulated Amortization Net September 30, 2017 Technology-based 7 years $ 387.8 $ (215.9 ) $ 171.9 Marketing-related 17 years 257.8 (59.9 ) 197.9 Contract-based 6 years 5.0 (5.0 ) — Customer-related 13 years 618.5 (161.7 ) 456.8 Database-related 19 years 481.0 (51.4 ) 429.6 Total intangible assets $ 1,750.1 $ (493.9 ) $ 1,256.2 December 31, 2016 Technology-based 7 years $ 310.9 $ (196.6 ) $ 114.3 Marketing-related 17 years 227.5 (47.5 ) 180.0 Contract-based 6 years 5.0 (5.0 ) — Customer-related 14 years 483.1 (128.5 ) 354.6 Database-related 20 years 393.9 (32.0 ) 361.9 Total intangible assets $ 1,420.4 $ (409.6 ) $ 1,010.8 Amortization expense related to intangible assets for the three months ended September 30, 2017 and 2016 was $27.5 million and $22.7 million , respectively. Amortization expense related to intangible assets for the nine months ended September 30, 2017 and 2016 was $73.6 million and $70.4 million , respectively. Estimated amortization expense for the remainder of 2017 and the years through 2022 and thereafter for intangible assets subject to amortization is as follows: Year Amount 2017 $ 30.5 2018 121.8 2019 120.8 2020 118.2 2021 108.3 2022 and thereafter 756.6 $ 1,256.2

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes: The Company’s effective tax rate for the three and nine months ended September 30, 2017 was 33.19% and 31.51% , respectively, compared to the effective tax rate for the three and nine months ended September 30, 2016 of 26.00% and 30.29% . The effective tax rate for the three and nine months ended September 30, 2017 is higher than the effective tax rate for the three and nine months ended September 30, 2016 primarily due to reduced tax benefits in the current period resulting from legislation enacted in the U.K., and mix of foreign income, partially offset by the tax rate benefit of adopting ASU No. 2016-09. The difference between statutory tax rates and the Company’s effective tax rate is primarily attributable to income earned in foreign jurisdictions with tax rates lower than the U.S. rate, offset by additional state and local income taxes.

Debt

Debt	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Debt	Debt: The following table presents short-term and long-term debt by issuance as of September 30, 2017 and December 31, 2016 : Issuance Date Maturity Date 2017 2016 Short-term debt and current portion of long-term debt: Syndicated revolving credit facility Various Various $ 595.0 $ 100.0 Capital lease obligations Various Various 7.9 6.8 Short-term debt and current portion of long-term 602.9 106.8 Long-term debt: Senior notes: 4.000% senior notes, less unamortized discount 5/15/2015 6/15/2025 890.5 889.6 5.500% senior notes, less unamortized discount 5/15/2015 6/15/2045 345.1 345.0 4.125% senior notes, less unamortized discount 9/12/2012 9/12/2022 347.0 346.5 4.875% senior notes, less unamortized discount 12/8/2011 1/15/2019 249.2 248.6 5.800% senior notes, less unamortized discount 4/6/2011 5/1/2021 448.1 447.6 Capital lease obligations Various Various 3.1 7.1 Syndicated revolving credit facility debt issuance Various Various (4.2 ) (4.2 ) Long-term debt 2,278.8 2,280.2 Total debt $ 2,881.7 $ 2,387.0 As of September 30, 2017 and December 31, 2016 , the Company had senior notes with an aggregate principal amount of $2,300.0 million outstanding and was in compliance with their financial debt covenants. As of September 30, 2017 , the Company had a borrowing capacity of $1,500.0 million under the committed senior unsecured Syndicated Revolving Credit Facility (the "Credit Facility") with Bank of America N.A., JP Morgan Chase, N.A., and a syndicate of banks. The Credit Facility may be used for general corporate purposes, including working capital needs and capital expenditures, acquisitions and the share repurchase program (the "Repurchase Program"). The Company was in compliance with all financial debt covenants under the Credit Facility as of September 30, 2017 . As of September 30, 2017 and December 31, 2016 , the Company had outstanding borrowings under the Credit Facility of $595.0 million and $100.0 million , respectively. On May 18, 2017, the Company entered into the third amendment to the Credit Facility, which, among other things, extended the maturity date one year to May 15, 2022.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity: The Company has 2,000,000,000 shares of authorized common stock. The common shares have rights to any dividend declared by the board of directors (the "Board"), subject to any preferential or other rights of any outstanding preferred stock, and voting rights to elect all thirteen members of the Board. The Company has 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. The Company did not issue any preferred shares as of September 30, 2017 . Share Repurchase Program Since the introduction of the Repurchase Program as a feature of the Company's capital management strategies in 2010, the Company has authorized repurchases of up to $2,800.0 million of its common stock and has repurchased shares with an aggregate value of $2,433.8 million . The Company repurchased 3,356,360 shares of common stock with an aggregate value of $269.8 million during the nine months ended September 30, 2017 . As of September 30, 2017 , the Company had $366.2 million available to repurchase shares. The Company has no obligation to repurchase stock under this program and intends to use this authorization as a means of offsetting dilution from the issuance of shares under the KSOP, the Verisk 2013 Equity Incentive Plan (the “2013 Incentive Plan”), the Verisk 2009 Equity Incentive Plan (the “2009 Incentive Plan”), and the ISO 1996 Incentive Plan (the “1996 Incentive Plan”), while providing flexibility to repurchase additional shares if warranted. This authorization has no expiration date and may be increased, reduced, suspended, or terminated at any time. Shares that are repurchased under the Repurchase Program will be recorded as treasury stock and will be available for future issuance. Treasury Stock As of September 30, 2017 , the Company’s treasury stock consisted of 379,486,284 shares of common stock. During the nine months ended September 30, 2017 , the Company reissued 957,342 shares of common stock from the treasury shares at a weighted average price of $8.07 per share. Earnings Per Share (“EPS”) Basic EPS is computed by dividing income from continuing operations, income from discontinued operations and net income, respectively, by the weighted average number of common shares outstanding during the period. The computation of diluted EPS is similar to the computation of basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding, using the treasury stock method, if the dilutive potential common shares, including stock options, nonvested restricted stock awards, and nonvested restricted stock units, had been issued. The following is a reconciliation of the numerators and denominators of the basic and diluted EPS computations for the three and nine months ended September 30, 2017 and 2016 : Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Numerator used in basic and diluted EPS: Income from continuing operations $ 120.7 $ 127.6 $ 350.5 $ 344.0 Income from discontinued operations (Note 5) — — — 137.9 Net income $ 120.7 $ 127.6 $ 350.5 $ 481.9 Denominator: Weighted average number of common shares used 164,577,575 168,874,129 165,314,267 168,541,399 Effect of dilutive shares: Potential common shares issuable from stock 3,379,483 2,911,771 3,493,138 2,953,790 Weighted average number of common shares 167,957,058 171,785,900 168,807,405 171,495,189 The potential shares of common stock that were excluded from diluted EPS were 2,471,487 and 1,239,406 for the three months ended September 30, 2017 and 2016 , and 2,158,723 and 1,890,460 for the nine months ended September 30, 2017 and 2016 , respectively, because the effect of including these potential shares was anti-dilutive. Accumulated Other Comprehensive Losses The following is a summary of accumulated other comprehensive losses as of September 30, 2017 and December 31, 2016 : 2017 2016 Foreign currency translation adjustment $ (356.5 ) $ (561.4 ) Unrealized holding gains on available-for-sale securities, net of tax 0.5 0.3 Pension and postretirement adjustment, net of tax (87.3 ) (89.7 ) Accumulated other comprehensive losses $ (443.3 ) $ (650.8 ) The before tax and after tax amounts of other comprehensive income for the three and nine months ended September 30, 2017 and 2016 are summarized below: Before Tax Tax (Expense) Benefit After Tax For the Three Months Ended September 30, 2017 Foreign currency translation adjustment $ 82.2 $ — $ 82.2 Pension and postretirement adjustment before reclassifications 2.4 (0.7 ) 1.7 Amortization of net actuarial loss and prior service benefit (1.2 ) 0.4 (0.8 ) Pension and postretirement adjustment 1.2 (0.3 ) 0.9 Total other comprehensive gain $ 83.4 $ (0.3 ) $ 83.1 For the Three Months Ended September 30, 2016 Foreign currency translation adjustment $ (62.1 ) $ — $ (62.1 ) Unrealized holding gain on available-for-sale securities before 0.7 (0.3 ) 0.4 Amount reclassified from accumulated other comprehensive losses (0.6 ) 0.3 (0.3 ) Unrealized holding gain on available-for-sale securities 0.1 — 0.1 Pension and postretirement adjustment before reclassifications 1.8 (1.0 ) 0.8 Amortization of net actuarial loss and prior service benefit (0.9 ) 0.3 (0.6 ) Pension and postretirement adjustment 0.9 (0.7 ) 0.2 Total other comprehensive loss $ (61.1 ) $ (0.7 ) $ (61.8 ) Before Tax Tax (Expense) Benefit After Tax For the Nine Months Ended September 30, 2017 Foreign currency translation adjustment $ 204.9 $ — $ 204.9 Unrealized holding gain on available-for-sale securities before 0.3 (0.1 ) 0.2 Unrealized holding gain on available-for-sale securities 0.3 (0.1 ) 0.2 Pension and postretirement adjustment before reclassifications 7.4 (2.7 ) 4.7 Amortization of net actuarial loss and prior service benefit (3.7 ) 1.4 (2.3 ) Pension and postretirement adjustment 3.7 (1.3 ) 2.4 Total other comprehensive gain $ 208.9 $ (1.4 ) $ 207.5 For the Nine Months Ended September 30, 2016 Foreign currency translation adjustment $ (278.6 ) $ — $ (278.6 ) Unrealized holding gain on available-for-sale securities before 0.8 (0.3 ) 0.5 Amount reclassified from accumulated other comprehensive losses (0.3 ) 0.1 (0.2 ) Unrealized holding gain on available-for-sale securities 0.5 (0.2 ) 0.3 Pension and postretirement adjustment before reclassifications 5.4 (2.3 ) 3.1 Amortization of net actuarial loss and prior service benefit (2.7 ) 1.0 (1.7 ) Pension and postretirement adjustment 2.7 (1.3 ) 1.4 Total other comprehensive loss $ (275.4 ) $ (1.5 ) $ (276.9 ) _______________ (1) This accumulated other comprehensive loss component, before tax, is included under “Investment income and others, net” in the accompanying condensed consolidated statements of operations. (2) These accumulated other comprehensive loss components, before tax, are included under “Cost of revenues” and “Selling, general and administrative” in the accompanying condensed consolidated statements of operations. These components are also included in the computation of net periodic (benefit) cost (see Note 11 Pension and Postretirement Benefits for additional details).

Equity Compensation Plans

Equity Compensation Plans	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Compensation Plans	Equity Compensation Plans: ISO 401(k) Savings and Employee Stock Ownership Plan ("KSOP") The Company has 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 the Company’s employees to participate in a tax-deferred savings arrangement under Internal Revenue Service Code Sections 401(a) and 401(k), and to provide employee equity participation in the Company through the employee stock ownership plan accounts. For the nine months ended September 30, 2017 , the Company opted to fund the 401(k) matching contributions in cash in lieu of issuance of common stock from treasury shares. For the nine months ended September 30, 2017 and 2016 , the Company made cash contributions of $13.0 million and common stock contributions of 143,439 shares at a weighted average price per share of $79.38 , respectively. Equity Compensation Plans All of the Company’s outstanding stock options and restricted stock awards are covered under the 2013 Incentive Plan, 2009 Incentive Plan or the 1996 Incentive Plan. Awards under the 2013 Incentive Plan may include one or more of the following types: (i) stock options (both nonqualified and incentive stock options), (ii) stock appreciation rights, (iii) restricted stock, (iv) restricted stock units, (v) performance awards, (vi) other share based awards, and (vii) cash. Employees, directors and consultants are eligible for awards under the 2013 Incentive Plan. The Company issued common stock under these plans from the Company’s treasury shares. As of September 30, 2017 , there were 6,798,916 shares of common stock reserved and available for future issuance under the 2013 Incentive Plan. Cash received from stock option exercises for the nine months ended September 30, 2017 and 2016 was $26.0 million and $32.6 million, respectively. The Company granted equity awards to key employees of the Company. The nonqualified stock options have an exercise price equal to the closing price of the Company’s common stock on the grant date, with a ten -year contractual term. The fair value of the restricted stock is determined using the closing price of the Company’s common stock on the grant date. The restricted stock is not assignable or transferable until it becomes vested. The Company recognizes the expense of the equity awards ratably over the vesting period. A summary of the equity awards granted for the nine months ended September 30, 2017 is presented below. Grant Date Service Vesting Period Stock Options Restricted Stock Common Stock January 1 to March 31, 2017 Four-year graded vesting 2,669 525 — April 1, 2017 Four-year graded vesting 1,300,007 248,489 — April 1, 2017 Two-year graded vesting 47,030 11,272 — May 30, 2017 Not applicable — — 372 July 1, 2017 One-year graded vesting 75,133 10,308 — July 1, 2017 Not applicable — 1,304 3,201 July 1 to September 30, 2017 Four-year graded vesting 5,240 1,078 — 1,430,079 272,976 3,573 The fair value of the stock options granted for the nine months ended September 30, 2017 and 2016 was estimated using a Black-Scholes valuation model that uses the weighted average assumptions noted in the following table: 2017 2016 Option pricing model Black-Scholes Black-Scholes Expected volatility 18.72 % 20.27 % Risk-free interest rate 1.82 % 1.14 % Expected term in years 4.5 4.5 Dividend yield — % — % Weighted average grant date fair value per stock option $ 15.71 $ 15.34 The expected term for the stock options granted was estimated based on studies of historical experience and projected exercise behavior. However, for certain awards granted, for which no historical exercise pattern exists, the expected term was estimated using the simplified method. The risk-free interest rate is based on the yield of U.S. Treasury zero coupon securities with a maturity equal to the expected term of the equity award. The volatility factor is calculated using historical daily closing prices over the most recent period that is commensurate with the expected term of the stock option award. The expected dividend yield was based on the Company’s expected annual dividend rate on the date of grant. A summary of the stock options outstanding and exercisable as of December 31, 2016 and September 30, 2017 and changes during the interim period are presented below: Number Weighted Aggregate Outstanding at December 31, 2016 8,770,917 $ 46.67 $ 302.6 Granted 1,430,079 $ 81.32 Exercised (773,206 ) $ 37.24 $ 35.0 Cancelled or expired (156,963 ) $ 76.40 Outstanding at September 30, 2017 9,270,827 $ 52.29 $ 286.4 Exercisable at September 30, 2017 6,170,584 $ 41.08 $ 259.8 Exercisable at December 31, 2016 6,148,349 $ 35.35 $ 281.7 Intrinsic value for stock options is calculated based on the exercise price of the underlying awards and the quoted price of Verisk common stock as of the reporting date. The Company adopted ASU No. 2016-09 prospectively on January 1, 2017 and excess tax benefits from exercised stock options were recorded as income tax benefit in the condensed consolidated statements of operations. This tax benefit is calculated as the excess of the intrinsic value of options exercised and restricted stock lapsed in excess of compensation recognized for financial reporting purposes. Prior to the adoption of ASU No. 2016-09, for the nine months ended September 30, 2016 , the Company recorded excess tax benefits of $18.4 million in "Additional paid-in capital" in the accompanying condensed consolidated balance sheets. Stock based compensation expense for the nine months ended September 30, 2017 and 2016 was $24.2 million and $23.8 million , respectively. The Company estimates expected forfeitures of equity awards at the date of grant and recognizes compensation expense only for those awards that the Company expects to vest. The forfeiture assumption is ultimately adjusted to the actual forfeiture rate. Changes in the forfeiture assumptions may impact the total amount of expense ultimately recognized over the requisite service period and may impact the timing of expense recognized over the requisite service period. A summary of the status of the restricted stock awarded under the 2013 Incentive Plan as of December 31, 2016 and September 30, 2017 and changes during the interim period are presented below: Number Weighted Average Grant Outstanding at December 31, 2016 537,667 $ 73.34 Granted 272,976 $ 81.29 Vested (193,239 ) $ 70.14 Forfeited (28,572 ) $ 76.87 Outstanding at September 30, 2017 588,832 $ 77.83 The Company’s employee stock purchase plan (“ESPP”) offers eligible employees the opportunity to purchase shares of the Company’s common stock at a discount of its fair market value at the time of purchase. During the nine months ended September 30, 2017 and 2016 , the Company issued 23,391 and 23,168 shares of common stock at a weighted discounted price of $78.77 and $76.64 for the ESPP, respectively. As of September 30, 2017 , there was $76.1 million of total unrecognized compensation costs, exclusive of the impact of vesting upon retirement eligibility, related to nonvested share-based compensation arrangements granted under the 2009 and 2013 Incentive Plans. That cost is expected to be recognized over a weighted average period of 2.67 years. As of September 30, 2017 , there were 2,943,743 and 588,612 nonvested stock options and restricted stock, respectively, of which 2,507,335 and 497,670 are expected to vest. The total grant date fair value of options vested during the nine months ended September 30, 2017 and 2016 was $12.3 million and $10.5 million , respectively. The total grant date fair value of restricted stock vested during the nine months ended September 30, 2017 and 2016 was $13.1 million and $10.6 million , respectively.

Pension and Postretirement Bene

Pension and Postretirement Benefits	9 Months Ended
	Sep. 30, 2017
Retirement Benefits [Abstract]
Pension and Postretirement Benefits	Pension and Postretirement Benefits: The Company maintained a frozen qualified defined benefit pension plan for certain of its employees through membership in the Pension Plan for Insurance Organizations (the “Pension Plan”), a multiple-employer trust. The Company has applied a cash balance formula to determine future benefits. Under the cash balance formula, each participant has an account, which is credited annually based on the interest earned on the previous year-end cash balance. The Company also has a frozen non-qualified supplemental cash balance plan (“SERP”) for certain employees. The SERP is funded from the general assets of the Company. The Company also provides certain healthcare and life insurance benefits to certain qualifying 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. The components of net periodic (benefit) cost for the three and nine months ended September 30, are summarized below: Pension Plan and SERP Postretirement Plan For the Three Months Ended September 30, 2017 2016 2017 2016 Interest cost $ 4.3 $ 4.9 $ 0.1 $ 0.1 Expected return on plan assets (7.8 ) (7.9 ) (0.1 ) (0.1 ) Amortization of net actuarial loss 1.1 0.9 0.1 — Net periodic (benefit) cost $ (2.4 ) $ (2.1 ) $ 0.1 $ — Employer contributions, net $ 0.3 $ 0.3 $ (0.2 ) $ 0.3 For the Nine Months Ended September 30, 2017 2016 2017 2016 Interest cost $ 12.9 $ 14.5 $ 0.3 $ 0.3 Expected return on plan assets (23.3 ) (23.8 ) (0.3 ) (0.4 ) Amortization of prior service cost 0.1 — (0.1 ) (0.1 ) Amortization of net actuarial loss 3.4 2.5 0.3 0.3 Net periodic (benefit) cost $ (6.9 ) $ (6.8 ) $ 0.2 $ 0.1 Employer contributions, net $ 0.8 $ 0.8 $ 0.4 $ 0.5 The expected contributions to the Pension Plan, SERP and Postretirement Plan for the year ending December 31, 2017 are consistent with the amounts previously disclosed as of December 31, 2016 .

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting: ASC 280-10, Disclosures About Segments of an Enterprise and Related Information (“ASC 280-10”), establishes standards for reporting information about operating segments. ASC 280-10 requires that a public business enterprise reports financial and descriptive information about its operating segments. Operating segments are components of an enterprise for which separate financial information is available that is evaluated regularly by the chief operating decision maker (“CODM”) in deciding how to allocate resources and in assessing performance. The Company’s President and Chief Executive Officer is identified as the CODM as defined by ASC 280-10. Consistent with the internal management of the Company’s business operations based on service offerings, the Company is organized into the following two operating segments, which are also the Company’s reportable segments: Decision Analytics: The Company develops solutions that its customers use to analyze the key processes in managing risk: ‘prediction of loss’, ‘detection and prevention of fraud’ and ‘quantification of loss’. The Company’s combination of algorithms and analytic methods incorporates its proprietary data to generate solutions. In most cases, the Company’s customers integrate the solutions into their models, formulas or underwriting criteria in order to predict potential loss events, such as hurricanes and earthquakes claims. The Company develops catastrophe and extreme event models and offers solutions covering natural and man-made risks, including acts of terrorism. The Company also develops solutions that allow customers to quantify costs after loss events occur. Fraud solutions include data on claim histories, analysis of claims to find emerging patterns of fraud, and identification of suspicious claims in the insurance sectors. The Company offers services and a suite of solutions to a client base that includes credit and debit card issuers, retail bank and other consumer financial services providers, payment processors, insurance companies and other industry stakeholders. The Company further leverages predictive models and proprietary data to advise customers to make asset investment and portfolio allocation decisions in the global energy market. The Company discloses revenue within this segment based on the industry vertical groupings of insurance, energy and specialized markets, and financial services. On June 1, 2016, the Company sold its healthcare business, Verisk Health, which was part of the Decision Analytics segment. Results of operations for the healthcare business are reported as a discontinued operation for the nine months ended September 30, 2016. Refer to Note 5 for more information. Risk Assessment: The Company is the leading provider of statistical, actuarial and underwriting data for the U.S. P&C insurance industry. The Company’s databases include cleansed and standardized records describing premiums and losses in insurance transactions, casualty and property risk attributes for commercial buildings and their occupants and fire suppression capabilities of municipalities. The Company uses this data to create policy language and proprietary risk classifications that are industry standards and to generate prospective loss cost estimates used to price insurance policies. The two aforementioned operating segments represent the segments for which discrete financial information is available and upon which operating results are regularly evaluated by the CODM in order to assess performance and allocate resources. The Company uses EBITDA as the profitability measure for making decisions regarding ongoing operations. EBITDA is net income before interest expense, provision for income taxes, depreciation and amortization of fixed and intangible assets. EBITDA is the measure of operating results used to assess corporate performance and optimal utilization of debt and acquisitions. Operating expenses consist of direct and indirect costs principally related to personnel, facilities, software license fees, consulting, travel, and third-party information services. Indirect costs are generally allocated to the segments using fixed rates established by management based upon estimated expense contribution levels and other assumptions that management considers reasonable. The Company does not allocate interest expense and provision for income taxes, since these items are not considered in evaluating the segment’s overall operating performance. In addition, the CODM does not evaluate the financial performance of each segment based on assets. On a geographic basis, revenues from countries outside of the U.S. accounted for 21.3% and 22.0% of the Company's consolidated revenues for the nine months ended September 30, 2017 and 2016 , respectively. No individual country outside of the U.S. accounted for 5.0% or more of the Company's consolidated revenues for the nine months ended September 30, 2017 or 2016 . The following table provides the Company’s revenue and EBITDA by reportable segment for the three and nine months ended September 30, 2017 and 2016 , and the reconciliation of EBITDA to operating income as shown in the accompanying condensed consolidated statements of operations: For the Three Months Ended September 30, 2017 September 30, 2016 Decision Risk Total Decision Risk Total Revenues $ 355.9 $ 193.2 $ 549.1 $ 317.3 $ 180.8 $ 498.1 Expenses: Cost of revenues (exclusive of items (141.7 ) (56.8 ) (198.5 ) (117.6 ) (52.1 ) (169.7 ) Selling, general and administrative (60.4 ) (20.5 ) (80.9 ) (55.4 ) (22.4 ) (77.8 ) Investment income and others, net 2.5 0.1 2.6 0.6 1.5 2.1 EBITDA 156.3 116.0 272.3 144.9 107.8 252.7 Depreciation and amortization of fixed (26.2 ) (7.6 ) (33.8 ) (22.6 ) (6.9 ) (29.5 ) Amortization of intangible assets (26.6 ) (0.9 ) (27.5 ) (22.5 ) (0.2 ) (22.7 ) Less: Investment income and others, net (2.5 ) (0.1 ) (2.6 ) (0.6 ) (1.5 ) (2.1 ) Operating income $ 101.0 $ 107.4 208.4 $ 99.2 $ 99.2 198.4 Investment income and others, net 2.6 2.1 Interest expense (30.3 ) (28.1 ) Income from continuing operations $ 180.7 $ 172.4 For the Nine Months Ended September 30, 2017 September 30, 2016 Decision Risk Total Decision Risk Total Revenues $ 999.7 $ 575.2 $ 1,574.9 $ 947.4 $ 541.7 $ 1,489.1 Expenses: Cost of revenues (exclusive of items (405.3 ) (169.8 ) (575.1 ) (362.6 ) (158.8 ) (521.4 ) Selling, general and (174.2 ) (61.4 ) (235.6 ) (161.8 ) (62.6 ) (224.4 ) Investment income and others, net 8.0 (0.1 ) 7.9 1.6 1.4 3.0 EBITDA from discontinued operations — — — 269.4 — 269.4 EBITDA 428.2 343.9 772.1 694.0 321.7 1,015.7 Depreciation and amortization of (76.7 ) (22.7 ) (99.4 ) (69.9 ) (20.8 ) (90.7 ) Amortization of intangible assets (71.0 ) (2.6 ) (73.6 ) (70.0 ) (0.4 ) (70.4 ) Less: Investment income and others, (8.0 ) 0.1 (7.9 ) (1.6 ) (1.4 ) (3.0 ) EBITDA from discontinued operations — — — (269.4 ) — (269.4 ) Operating income $ 272.5 $ 318.7 591.2 $ 283.1 $ 299.1 582.2 Investment income and others, net 7.9 3.0 Interest expense (87.3 ) (91.7 ) Income from continuing operations $ 511.8 $ 493.5 Operating segment revenues by type of service is provided below: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2017 2016 2017 2016 Decision Analytics: Insurance $ 203.9 $ 174.4 $ 573.5 $ 521.4 Energy and specialized markets 111.4 109.1 328.0 333.2 Financial services 40.6 33.8 98.2 92.8 Total Decision Analytics 355.9 317.3 999.7 947.4 Risk Assessment: Industry-standard insurance programs 149.0 138.2 442.7 414.2 Property-specific rating and underwriting 44.2 42.6 132.5 127.5 Total Risk Assessment 193.2 180.8 575.2 541.7 Total revenues $ 549.1 $ 498.1 $ 1,574.9 $ 1,489.1 Long-lived assets by country are provided below: September 30, 2017 December 31, 2016 Long-lived assets: United States of America $ 2,101.9 $ 1,754.0 United Kingdom 2,658.7 2,102.5 Other countries 322.9 273.8 Total long-lived assets $ 5,083.5 $ 4,130.3

Related Parties

Related Parties	9 Months Ended
	Sep. 30, 2017
Related Party Transactions [Abstract]
Related Parties	Related Parties: The Company considers its stockholders that own more than 5.0% of the outstanding common stock to be related parties as defined within ASC 850, Related Party Disclosures . As of September 30, 2017 and December 31, 2016 , the Company had no material transactions with related parties owning more than 5.0% of its common stock, except for transactions with the KSOP as disclosed in Note 16 Compensation Plans of the Company's consolidated financial statements included in the 2016 Form 10-K filing.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies: The Company is a party to legal proceedings with respect to a variety of matters in the ordinary course of business, including the matters described below. With respect to ongoing matters, the Company is unable, at the present time, to determine the ultimate resolution of or provide a reasonable estimate of the range of possible loss attributable to these matters or the impact they may have on the Company’s results of operations, financial position or cash flows. This is primarily because the matters are generally in early stages and discovery has either not commenced or been completed. Although the Company believes it has strong defenses and intends to vigorously defend these matters, the Company could in the future incur judgments or enter into settlements of claims that could have a material adverse effect on its results of operations, financial position or cash flows. Intellicorp Records, Inc. Litigation On September 9, 2015, the Company was served with a nationwide putative class action complaint filed in the Court of Common Pleas, Cuyahoga County in Ohio naming the Company’s subsidiary Intellicorp Records, Inc. (“Intellicorp”) titled Sherri Legrand v. Intellicorp Records, Inc. and The Cato Corporation et al. Defendants removed the case to the United States District Court for the Northern District of Ohio on October 8, 2015. Plaintiffs filed their First Amended Class Action Complaint on November 5, 2015 (“Amended Complaint”), which like the prior complaint claims violations of the Fair Credit Reporting Act ("FCRA") and alleges two putative class claims against Intellicorp, namely (i) a section 1681k(a) claim on behalf of all individuals who were the subjects of consumer reports furnished by Intellicorp, which contained public record information in the “Government Sanctions” section of the report on or after September 4, 2013 and continuing through the date the class list is prepared, and (ii) a section 1681e(b) claim on behalf of all individuals who were the subjects of consumer reports furnished by Intellicorp, which contained public record information in the “Government Sanctions” section of the report where the address or social security number of the subject of the report do not match the social security number or address contained in the government database on or after September 4, 2013 and continuing through the date the class list is prepared. Count I of the Amended Complaint alleges that defendant Cato violated the FCRA by procuring consumer reports on the plaintiff and other class members without making the stand-alone disclosure required by FCRA section 1681b(b)(2)(A)(i). Counts II and III allege that Intellicorp violated the FCRA section 1681e (b) by failing to follow reasonable procedures to assure maximum accuracy of the adverse information included in its consumer reports and FCRA section 1681k (a) by failing to maintain strict procedures to assure that the public record information reported, which was likely to have an adverse effect on the consumer was complete and up to date, respectively. The Amended Complaint alleges that defendants acted willfully and seeks statutory damages for the classes in an amount not less than one hundred dollars and not more than one thousand dollars per violation, punitive damages, equitable relief, costs and attorney’s fees. On April 24, 2017, the parties agreed to resolve the litigation in a Settlement Agreement and Release and plaintiffs filed their Motion for Preliminary Approval of the settlement on the same day. The settlement provides for a non-material cash payment by the Company, as well as certain non-monetary relief. The District Court granted the Motion for Preliminary Approval on April 25, 2017 and the final approval hearing has been re-scheduled for October 31, 2017. Xactware Solutions, Inc. Patent Litigation On October 8, 2015, the Company was served with a summons and complaint in an action titled Eagle View Technologies, Inc. and Pictometry International Group, Inc. v. Xactware Solutions, Inc. and Verisk Analytics, Inc. filed in the United States District Court for the District of New Jersey. The complaint alleges that the Company’s Roof InSight, Property InSight and Aerial Sketch products infringe seven patents owned by Eagle View and Pictometry namely, Patent Nos. 436, 840, 152, 880, 770, 732 and 454. On November 30, 2015, plaintiffs filed a First Amended Complaint adding Patent Nos. 376 and 737 to the Patents in Suit. The First Amended Complaint seeks an entry of judgment by the Court that defendants have and continue to directly infringe and/or indirectly infringe, by way of inducement the Patents-in-Suit, permanent injunctive relief, damages, costs and attorney’s fees. On May 17, 2017, the District Court so ordered a Joint Stipulated Order of Partial Dismissal with Prejudice dismissing all claims or assertions pertaining to Pictometry Patents Nos. 880 and 732 and certain enumerated claims or assertions pertaining to Eagle View Patents Nos. 436, 840, 152, 770, 454, 376 and 737 (collectively the “Patents in Suit”). At this time, it is not reasonably possible to determine the ultimate resolution of, or estimate the liability related to this matter. Interthinx, Inc. Litigation On April 20, 2015, the Company was served with a putative class action titled John Weber v. Interthinx, Inc. and Verisk Analytics, Inc. The plaintiff, a former employee of the Company’s former subsidiary Interthinx, Inc. in Missouri, filed the class action complaint in the United States District Court for the Eastern District of Missouri on behalf of all review appraisers and individuals holding comparable positions with different titles who were employed by Interthinx for the last three years nationwide and who were not paid overtime wages. The class complaint claims that the review appraiser employees were misclassified as exempt employees and, as a result, were denied certain wages and benefits that would have been received if they were properly classified as non-exempt employees. It pleads a Collective Action under section 216(b) of the Fair Labor Standards Act for unpaid overtime and seeks overtime wages, liquidated damages, declaratory relief, interest, costs and attorneys’ fees. On March 11, 2014, the Company sold 100 percent of the stock of Interthinx, Inc. The parties agreed to resolve this matter with the Company’s contribution of a non-material amount in the Class Action Settlement Agreement executed on November 8, 2016. For settlement purposes only, this matter was consolidated with a related action pending in the Los Angeles Superior Court in which the Company is not a party, titled Sager v. Interthinx. On February 21, 2017, the Los Angeles Superior Court approved the settlement at the preliminary approval hearing. The Court held a final approval hearing on August 22, 2017 and issued its Final Order and Judgment Approving the Class Settlement on September 25, 2017. Insurance Services Office, Inc. Litigation On August 1, 2014 the Company was served with an Amended Complaint filed in the United States District Court for the District of Colorado titled Snyder, et. al. v. ACORD Corp., et al. The action is brought by nineteen individual plaintiffs, on their own behalf and on behalf of a putative class, against more than 120 defendants, including the Company and ISO. Except for the Company, ISO and the defendant Acord Corporation, which provides standard forms to assist in insurance transactions, most of the other defendants are property and casualty insurance companies that plaintiffs claim conspired to underpay property damage claims. Plaintiffs claim that the Company and ISO, along with all of the other defendants, violated state and federal antitrust and racketeering laws as well as state common law. On September 8, 2014, the Court entered an Order striking the Amended Complaint and granting leave to the plaintiffs to file a new complaint. On October 13, 2014, plaintiffs filed their Second Amended Complaint, which was re-filed by plaintiffs to correct errors as the Third Amended Complaint. The Third Amended Complaint similarly alleges that the defendants conspired to underpay property damage claims, but does not specifically allege what role the Company or ISO played in the alleged conspiracy. It claims that the Company and ISO, along with all of the other defendants, violated state and federal antitrust and racketeering laws as well as state common law, and seeks all available relief including injunctive, statutory, actual and punitive damages as well as attorneys’ fees. On January 15, 2016, the Court granted defendants’ motions to dismiss all claims asserted in the Third Amended Complaint. Plaintiffs filed a motion for reconsideration of this dismissal on February 16, 2016. The Court granted defendants’ motion to strike the motion for reconsideration on March 2, 2016 and gave plaintiffs leave to file another motion for reconsideration in accordance with the rules which plaintiffs filed on March 11, 2016 and, which was denied by the Court on April 25, 2016. On April 1, 2016, plaintiffs also filed a Notice of Appeal of the Court’s January 15, 2016 Order, which dismissed all claims in the Third Amended Complaint. Plaintiffs also filed an appeal of the Court’s denial of the motion for reconsideration, which the Court of Appeals for the 10th Circuit consolidated with the appeal of the Court’s January 15, 2016 dismissal. Appellants filed their brief in support of the consolidated appeal on July 21, 2016 and Appellees filed their brief in response on September 21, 2016. On April 6, 2017, the Court of Appeals for the 10th Circuit affirmed the Court’s dismissal of the Third Amended Complaint. Appellants filed a motion for en banc reconsideration of the 10th Circuit’s affirmance of the dismissal of the Third Amended Complaint which was denied on May 26, 2017. Appellants filed their petition for a writ of certiorari in the Supreme Court on August 24, 2017 which was denied on October 30, 2017.

Basis of Presentation and Sum24

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers (“Topic 606”). Topic 606 replaces numerous requirements in U.S. GAAP, including industry-specific requirements, and provides companies with a single revenue recognition model for recognizing revenue from contracts with customers. The core principle of Topic 606 is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The two permitted transition methods under Topic 606 are the full retrospective method, in which case the standard would be applied to each prior reporting period presented and the cumulative effect of applying the standard would be recognized at the earliest period shown, or the modified retrospective method, in which case the cumulative effect of applying the standard would be recognized at the date of initial application. In July 2015, the FASB approved the deferral of Topic 606's effective date by one year. Topic 606 is effective for annual reporting periods beginning after December 15, 2017. The FASB permits companies to adopt Topic 606 early, but not before the original effective date of the annual reporting periods beginning after December 15, 2016. The Company established a corporate implementation team, which engages with cross-functional representatives from all of its business verticals. The Company utilized a bottom-up approach, with the assistance of third party specialists, to analyze the impact of the standard on the contract portfolio by reviewing current accounting policies and practices to identify potential differences that would result from applying the requirements of Topic 606 to revenue contracts. In addition, the Company identified and is in the process of implementing appropriate changes to its business processes, systems, and controls to support recognition and disclosure under Topic 606. The Company is currently planning to adopt Topic 606 using the modified retrospective approach and is in the process of evaluating the impact of adopting Topic 606 on its condensed consolidated financial statements. The Company’s revenue streams primarily consist of subscription services provided through a hosted environment or by delivering term based software as well as other services including consulting and transactional solutions. Based on a preliminary assessment, the analysis of the contract portfolio under Topic 606 results in the revenue for the majority of the Company's customer contracts being recognized over time, as the Company offers most of its solutions through a series of services primarily in a hosted environment, which is consistent with the Company's current revenue recognition model. For the majority of its contracts, there is continuous transfer of control to the customer and the number of performance obligations under Topic 606 is consistent with those identified under the existing standard. The Company is also closely reviewing its licensing revenue streams to determine whether the nature of a promise in granting a license is to provide a right to access the Company’s intellectual property, which is satisfied over time and for which revenue is recognized over time, or to provide a right to use the Company’s intellectual property, which is satisfied at a point in time and for which revenue is recognized at a point in time. An identified impact of adopting Topic 606 relates to the deferral of commissions on revenue contracts, which are currently expensed as incurred but under Topic 606 the majority of such commissions will likely be capitalized and amortized over a period of time. The Company expects that a major portion of its commission expenses for sales employees will be capitalized and will be subject to an amortization period of up to five years. The Company's commission expense is about 1.2% and 1.0% of its total expenses, for the nine months ended September 30, 2017 and for the year ended December 31, 2016, respectively. In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting (“ASU No. 2016-09”). The objective of this update is to simplify several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The Company adopted the guidance prospectively for the income statement impact of income taxes and has retrospectively applied the guidance to the condensed consolidated statements of cash flows for the impact of excess tax benefits on January 1, 2017 in accordance with ASU No. 2016-09. The presentation requirements for cash flows related to employee taxes paid for withheld shares had no impact to any of the periods presented in the condensed consolidated statements of cash flows, since such cash flows have historically been presented in financing activities. The treatment of forfeitures has not changed as the Company is electing to continue the current process of estimating the number of forfeitures. Accordingly, excess tax benefits from exercised stock options in 2017 were recorded as income tax benefit in the condensed consolidated statements of operations and presented as an operating activity on the condensed consolidated statements of cash flows for the nine months ended September 30, 2017 . There was no cumulative-effect adjustment required to retained earnings under the prospective method as of the beginning of the year because all tax benefits had been previously recognized when the tax deductions related to stock compensation were utilized to reduce tax payable. The Company did not record any deferred tax assets or tax liabilities as the result of the adoption of ASU 2016-09. In May 2017, the FASB issued ASU No. 2017-09, Scope of Modification Accounting ("ASU 2017-09"), that clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. Under the guidance within this update, a company will not apply modification accounting to a share-based payment award if all of the following are the same immediately before and after the change: • The award’s fair value (or calculated value or intrinsic value, if those measurement methods are used) • The award’s vesting conditions • The award’s classification as an equity or liability instrument. ASU No. 2017-09 is effective for annual periods beginning after December 15, 2017, including interim periods within those periods. The amendments in this update should be applied prospectively to an award modified on or after the effective date. The Company will evaluate the impact of ASU No. 2017-09 for future award changes subsequent to the effective date.
Segment Reporting	ASC 280-10, Disclosures About Segments of an Enterprise and Related Information (“ASC 280-10”), establishes standards for reporting information about operating segments. ASC 280-10 requires that a public business enterprise reports financial and descriptive information about its operating segments.
Related Party Disclosures	The Company considers its stockholders that own more than 5.0% of the outstanding common stock to be related parties as defined within ASC 850, Related Party Disclosures . As of September 30, 2017 and December 31, 2016 , the Company had no material transactions with related parties owning more than 5.0% of its common stock, except for transactions with the KSOP as disclosed in Note 16 Compensation Plans of the Company's consolidated financial statements included in the 2016 Form 10-K filing.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Accounted at Fair Value	The following table summarizes fair value measurements by level for cash equivalents and registered investment companies that were measured at fair value on a recurring basis: Quoted Prices in Active Markets for Identical Assets (Level 1) September 30, 2017 Registered investment companies (1) $ 3.7 December 31, 2016 Registered investment companies (1) $ 3.4 ______________________ (1) Registered investment companies are classified as available-for-sale securities and are valued using quoted prices in active markets multiplied by the number of shares owned.
Summary of Carrying Value and Estimated Fair Value of Long-Term Debt	The following table summarizes the carrying value and estimated fair value of these financial instruments as of September 30, 2017 and December 31, 2016 , respectively: 2017 2016 Fair Value Hierarchy Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial instruments not carried at fair value: Subordinated promissory note receivable Level 2 $ 94.8 $ 84.9 $ 84.1 $ 76.8 Long-term debt excluding capitalized Level 2 $ 2,279.8 $ 2,456.7 $ 2,277.3 $ 2,402.6

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The preliminary purchase price allocations of the 2017 acquisitions resulted in the following: Healix Fintellix G2 Sequel LCI Others Total Cash and cash equivalents $ 0.9 $ 1.1 $ 1.0 $ 16.0 $ 1.1 $ 2.0 $ 22.1 Accounts receivable 0.9 2.1 3.4 9.5 3.1 2.9 21.9 Current assets — 0.9 3.6 1.4 — 0.7 6.6 Fixed assets — 0.1 6.4 7.5 5.7 11.9 31.6 Intangible assets 21.1 6.6 41.0 107.3 55.7 12.2 243.9 Goodwill 35.2 11.3 74.2 226.0 100.7 33.5 480.9 Other assets 7.5 2.0 2.8 — 12.8 3.3 28.4 Total assets acquired 65.6 24.1 132.4 367.7 179.1 66.5 835.4 Current liabilities 1.1 1.3 3.2 9.9 1.1 1.4 18.0 Deferred revenues 0.1 0.8 0.4 2.4 0.3 1.7 5.7 Deferred income taxes, net 3.6 2.2 13.0 19.1 13.2 2.1 53.2 Other liabilities 7.5 1.8 2.8 — 12.8 6.3 31.2 Total liabilities assumed 12.3 6.1 19.4 31.4 27.4 11.5 108.1 Net assets acquired 53.3 18.0 113.0 336.3 151.7 55.0 727.3 Cash acquired (0.9 ) (1.1 ) (1.0 ) (16.0 ) (1.1 ) (2.0 ) (22.1 ) Net cash purchase price $ 52.4 $ 16.9 $ 112.0 $ 320.3 $ 150.6 $ 53.0 $ 705.2
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination	The preliminary amounts assigned to intangible assets by type for the 2017 acquisitions are summarized in the table below: Weighted Average Useful Life Total Technology-related 7 years $ 66.3 Marketing-related 8 years 15.3 Customer-related 10 years 110.0 Database-related 12 years 52.3 Total intangible assets $ 243.9

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2017
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Results from Discontinued Operations	The following table summarizes the results from the discontinued operation for the nine months ended September 30: Nine Months Ended September 30, 2017 2016 Revenues from discontinued operations $ — $ 112.3 Expenses: Cost of revenues (exclusive of items shown separately below) — 75.9 Selling, general and administrative — 36.6 Depreciation and amortization of fixed assets — 7.0 Amortization of intangible assets — 5.9 Total expenses — 125.4 Operating loss — (13.1 ) Other income: Gain on sale — 269.3 Investment income and others, net — 0.3 Total other income — 269.6 Income from discontinued operations before income taxes — 256.5 Provision for income taxes (included tax on gain of $118.0) — (118.6 ) Income from discontinued operations, net of tax $ — $ 137.9 Net cash provided by operating activities and net cash used in investing activities from the discontinued operation for the nine months ended September 30 are presented below: 2017 2016 Net cash provided by operating activities $ — $ 21.4 Net cash used in investing activities $ — $ (10.6 )

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Change in Goodwill	The following is a summary of the change in goodwill from December 31, 2016 through September 30, 2017 , both in total and as allocated to the Company’s operating segments: Risk Assessment Decision Analytics Total Goodwill at December 31, 2016 (1) $ 71.3 $ 2,506.8 $ 2,578.1 Current year acquisitions 35.2 445.7 480.9 Purchase accounting reclassification (1.6 ) (2.2 ) (3.8 ) Foreign currency translation 3.2 130.4 133.6 Goodwill at September 30, 2017 (1) $ 108.1 $ 3,080.7 $ 3,188.8 ______________________ (1) These balances are net of accumulated impairment charges of $3.2 million that occurred prior to December 31, 2016 .
Intangible Assets and Related Accumulated Amortization	The Company’s intangible assets and related accumulated amortization consisted of the following: Weighted Average Useful Life Cost Accumulated Amortization Net September 30, 2017 Technology-based 7 years $ 387.8 $ (215.9 ) $ 171.9 Marketing-related 17 years 257.8 (59.9 ) 197.9 Contract-based 6 years 5.0 (5.0 ) — Customer-related 13 years 618.5 (161.7 ) 456.8 Database-related 19 years 481.0 (51.4 ) 429.6 Total intangible assets $ 1,750.1 $ (493.9 ) $ 1,256.2 December 31, 2016 Technology-based 7 years $ 310.9 $ (196.6 ) $ 114.3 Marketing-related 17 years 227.5 (47.5 ) 180.0 Contract-based 6 years 5.0 (5.0 ) — Customer-related 14 years 483.1 (128.5 ) 354.6 Database-related 20 years 393.9 (32.0 ) 361.9 Total intangible assets $ 1,420.4 $ (409.6 ) $ 1,010.8
Estimated Amortization Expense	Estimated amortization expense for the remainder of 2017 and the years through 2022 and thereafter for intangible assets subject to amortization is as follows: Year Amount 2017 $ 30.5 2018 121.8 2019 120.8 2020 118.2 2021 108.3 2022 and thereafter 756.6 $ 1,256.2

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Short-Term and Long-Term Debt	The following table presents short-term and long-term debt by issuance as of September 30, 2017 and December 31, 2016 : Issuance Date Maturity Date 2017 2016 Short-term debt and current portion of long-term debt: Syndicated revolving credit facility Various Various $ 595.0 $ 100.0 Capital lease obligations Various Various 7.9 6.8 Short-term debt and current portion of long-term 602.9 106.8 Long-term debt: Senior notes: 4.000% senior notes, less unamortized discount 5/15/2015 6/15/2025 890.5 889.6 5.500% senior notes, less unamortized discount 5/15/2015 6/15/2045 345.1 345.0 4.125% senior notes, less unamortized discount 9/12/2012 9/12/2022 347.0 346.5 4.875% senior notes, less unamortized discount 12/8/2011 1/15/2019 249.2 248.6 5.800% senior notes, less unamortized discount 4/6/2011 5/1/2021 448.1 447.6 Capital lease obligations Various Various 3.1 7.1 Syndicated revolving credit facility debt issuance Various Various (4.2 ) (4.2 ) Long-term debt 2,278.8 2,280.2 Total debt $ 2,881.7 $ 2,387.0

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following is a reconciliation of the numerators and denominators of the basic and diluted EPS computations for the three and nine months ended September 30, 2017 and 2016 : Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Numerator used in basic and diluted EPS: Income from continuing operations $ 120.7 $ 127.6 $ 350.5 $ 344.0 Income from discontinued operations (Note 5) — — — 137.9 Net income $ 120.7 $ 127.6 $ 350.5 $ 481.9 Denominator: Weighted average number of common shares used 164,577,575 168,874,129 165,314,267 168,541,399 Effect of dilutive shares: Potential common shares issuable from stock 3,379,483 2,911,771 3,493,138 2,953,790 Weighted average number of common shares 167,957,058 171,785,900 168,807,405 171,495,189
Summary of Accumulated Other Comprehensive Losses	The following is a summary of accumulated other comprehensive losses as of September 30, 2017 and December 31, 2016 : 2017 2016 Foreign currency translation adjustment $ (356.5 ) $ (561.4 ) Unrealized holding gains on available-for-sale securities, net of tax 0.5 0.3 Pension and postretirement adjustment, net of tax (87.3 ) (89.7 ) Accumulated other comprehensive losses $ (443.3 ) $ (650.8 )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	The before tax and after tax amounts of other comprehensive income for the three and nine months ended September 30, 2017 and 2016 are summarized below: Before Tax Tax (Expense) Benefit After Tax For the Three Months Ended September 30, 2017 Foreign currency translation adjustment $ 82.2 $ — $ 82.2 Pension and postretirement adjustment before reclassifications 2.4 (0.7 ) 1.7 Amortization of net actuarial loss and prior service benefit (1.2 ) 0.4 (0.8 ) Pension and postretirement adjustment 1.2 (0.3 ) 0.9 Total other comprehensive gain $ 83.4 $ (0.3 ) $ 83.1 For the Three Months Ended September 30, 2016 Foreign currency translation adjustment $ (62.1 ) $ — $ (62.1 ) Unrealized holding gain on available-for-sale securities before 0.7 (0.3 ) 0.4 Amount reclassified from accumulated other comprehensive losses (0.6 ) 0.3 (0.3 ) Unrealized holding gain on available-for-sale securities 0.1 — 0.1 Pension and postretirement adjustment before reclassifications 1.8 (1.0 ) 0.8 Amortization of net actuarial loss and prior service benefit (0.9 ) 0.3 (0.6 ) Pension and postretirement adjustment 0.9 (0.7 ) 0.2 Total other comprehensive loss $ (61.1 ) $ (0.7 ) $ (61.8 ) Before Tax Tax (Expense) Benefit After Tax For the Nine Months Ended September 30, 2017 Foreign currency translation adjustment $ 204.9 $ — $ 204.9 Unrealized holding gain on available-for-sale securities before 0.3 (0.1 ) 0.2 Unrealized holding gain on available-for-sale securities 0.3 (0.1 ) 0.2 Pension and postretirement adjustment before reclassifications 7.4 (2.7 ) 4.7 Amortization of net actuarial loss and prior service benefit (3.7 ) 1.4 (2.3 ) Pension and postretirement adjustment 3.7 (1.3 ) 2.4 Total other comprehensive gain $ 208.9 $ (1.4 ) $ 207.5 For the Nine Months Ended September 30, 2016 Foreign currency translation adjustment $ (278.6 ) $ — $ (278.6 ) Unrealized holding gain on available-for-sale securities before 0.8 (0.3 ) 0.5 Amount reclassified from accumulated other comprehensive losses (0.3 ) 0.1 (0.2 ) Unrealized holding gain on available-for-sale securities 0.5 (0.2 ) 0.3 Pension and postretirement adjustment before reclassifications 5.4 (2.3 ) 3.1 Amortization of net actuarial loss and prior service benefit (2.7 ) 1.0 (1.7 ) Pension and postretirement adjustment 2.7 (1.3 ) 1.4 Total other comprehensive loss $ (275.4 ) $ (1.5 ) $ (276.9 ) _______________ (1) This accumulated other comprehensive loss component, before tax, is included under “Investment income and others, net” in the accompanying condensed consolidated statements of operations. (2) These accumulated other comprehensive loss components, before tax, are included under “Cost of revenues” and “Selling, general and administrative” in the accompanying condensed consolidated statements of operations. These components are also included in the computation of net periodic (benefit) cost (see Note 11 Pension and Postretirement Benefits for additional details).

Equity Compensation Plans (Tabl

Equity Compensation Plans (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Other Share-based Compensation, Activity	A summary of the equity awards granted for the nine months ended September 30, 2017 is presented below. Grant Date Service Vesting Period Stock Options Restricted Stock Common Stock January 1 to March 31, 2017 Four-year graded vesting 2,669 525 — April 1, 2017 Four-year graded vesting 1,300,007 248,489 — April 1, 2017 Two-year graded vesting 47,030 11,272 — May 30, 2017 Not applicable — — 372 July 1, 2017 One-year graded vesting 75,133 10,308 — July 1, 2017 Not applicable — 1,304 3,201 July 1 to September 30, 2017 Four-year graded vesting 5,240 1,078 — 1,430,079 272,976 3,573
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The fair value of the stock options granted for the nine months ended September 30, 2017 and 2016 was estimated using a Black-Scholes valuation model that uses the weighted average assumptions noted in the following table: 2017 2016 Option pricing model Black-Scholes Black-Scholes Expected volatility 18.72 % 20.27 % Risk-free interest rate 1.82 % 1.14 % Expected term in years 4.5 4.5 Dividend yield — % — % Weighted average grant date fair value per stock option $ 15.71 $ 15.34
Summary of Stock Options Outstanding	A summary of the stock options outstanding and exercisable as of December 31, 2016 and September 30, 2017 and changes during the interim period are presented below: Number Weighted Aggregate Outstanding at December 31, 2016 8,770,917 $ 46.67 $ 302.6 Granted 1,430,079 $ 81.32 Exercised (773,206 ) $ 37.24 $ 35.0 Cancelled or expired (156,963 ) $ 76.40 Outstanding at September 30, 2017 9,270,827 $ 52.29 $ 286.4 Exercisable at September 30, 2017 6,170,584 $ 41.08 $ 259.8 Exercisable at December 31, 2016 6,148,349 $ 35.35 $ 281.7
Summary of Restricted Stock Awards	A summary of the status of the restricted stock awarded under the 2013 Incentive Plan as of December 31, 2016 and September 30, 2017 and changes during the interim period are presented below: Number Weighted Average Grant Outstanding at December 31, 2016 537,667 $ 73.34 Granted 272,976 $ 81.29 Vested (193,239 ) $ 70.14 Forfeited (28,572 ) $ 76.87 Outstanding at September 30, 2017 588,832 $ 77.83

Pension and Postretirement Be32

Pension and Postretirement Benefits (Tables)	9 Months Ended
	Sep. 30, 2017
Retirement Benefits [Abstract]
Components of Net Periodic (Benefit) Cost	The components of net periodic (benefit) cost for the three and nine months ended September 30, are summarized below: Pension Plan and SERP Postretirement Plan For the Three Months Ended September 30, 2017 2016 2017 2016 Interest cost $ 4.3 $ 4.9 $ 0.1 $ 0.1 Expected return on plan assets (7.8 ) (7.9 ) (0.1 ) (0.1 ) Amortization of net actuarial loss 1.1 0.9 0.1 — Net periodic (benefit) cost $ (2.4 ) $ (2.1 ) $ 0.1 $ — Employer contributions, net $ 0.3 $ 0.3 $ (0.2 ) $ 0.3 For the Nine Months Ended September 30, 2017 2016 2017 2016 Interest cost $ 12.9 $ 14.5 $ 0.3 $ 0.3 Expected return on plan assets (23.3 ) (23.8 ) (0.3 ) (0.4 ) Amortization of prior service cost 0.1 — (0.1 ) (0.1 ) Amortization of net actuarial loss 3.4 2.5 0.3 0.3 Net periodic (benefit) cost $ (6.9 ) $ (6.8 ) $ 0.2 $ 0.1 Employer contributions, net $ 0.8 $ 0.8 $ 0.4 $ 0.5

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Reconciliations To Income Before Income Taxes	The following table provides the Company’s revenue and EBITDA by reportable segment for the three and nine months ended September 30, 2017 and 2016 , and the reconciliation of EBITDA to operating income as shown in the accompanying condensed consolidated statements of operations: For the Three Months Ended September 30, 2017 September 30, 2016 Decision Risk Total Decision Risk Total Revenues $ 355.9 $ 193.2 $ 549.1 $ 317.3 $ 180.8 $ 498.1 Expenses: Cost of revenues (exclusive of items (141.7 ) (56.8 ) (198.5 ) (117.6 ) (52.1 ) (169.7 ) Selling, general and administrative (60.4 ) (20.5 ) (80.9 ) (55.4 ) (22.4 ) (77.8 ) Investment income and others, net 2.5 0.1 2.6 0.6 1.5 2.1 EBITDA 156.3 116.0 272.3 144.9 107.8 252.7 Depreciation and amortization of fixed (26.2 ) (7.6 ) (33.8 ) (22.6 ) (6.9 ) (29.5 ) Amortization of intangible assets (26.6 ) (0.9 ) (27.5 ) (22.5 ) (0.2 ) (22.7 ) Less: Investment income and others, net (2.5 ) (0.1 ) (2.6 ) (0.6 ) (1.5 ) (2.1 ) Operating income $ 101.0 $ 107.4 208.4 $ 99.2 $ 99.2 198.4 Investment income and others, net 2.6 2.1 Interest expense (30.3 ) (28.1 ) Income from continuing operations $ 180.7 $ 172.4 For the Nine Months Ended September 30, 2017 September 30, 2016 Decision Risk Total Decision Risk Total Revenues $ 999.7 $ 575.2 $ 1,574.9 $ 947.4 $ 541.7 $ 1,489.1 Expenses: Cost of revenues (exclusive of items (405.3 ) (169.8 ) (575.1 ) (362.6 ) (158.8 ) (521.4 ) Selling, general and (174.2 ) (61.4 ) (235.6 ) (161.8 ) (62.6 ) (224.4 ) Investment income and others, net 8.0 (0.1 ) 7.9 1.6 1.4 3.0 EBITDA from discontinued operations — — — 269.4 — 269.4 EBITDA 428.2 343.9 772.1 694.0 321.7 1,015.7 Depreciation and amortization of (76.7 ) (22.7 ) (99.4 ) (69.9 ) (20.8 ) (90.7 ) Amortization of intangible assets (71.0 ) (2.6 ) (73.6 ) (70.0 ) (0.4 ) (70.4 ) Less: Investment income and others, (8.0 ) 0.1 (7.9 ) (1.6 ) (1.4 ) (3.0 ) EBITDA from discontinued operations — — — (269.4 ) — (269.4 ) Operating income $ 272.5 $ 318.7 591.2 $ 283.1 $ 299.1 582.2 Investment income and others, net 7.9 3.0 Interest expense (87.3 ) (91.7 ) Income from continuing operations $ 511.8 $ 493.5
Operating Segment Revenue by Type of Service	Operating segment revenues by type of service is provided below: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2017 2016 2017 2016 Decision Analytics: Insurance $ 203.9 $ 174.4 $ 573.5 $ 521.4 Energy and specialized markets 111.4 109.1 328.0 333.2 Financial services 40.6 33.8 98.2 92.8 Total Decision Analytics 355.9 317.3 999.7 947.4 Risk Assessment: Industry-standard insurance programs 149.0 138.2 442.7 414.2 Property-specific rating and underwriting 44.2 42.6 132.5 127.5 Total Risk Assessment 193.2 180.8 575.2 541.7 Total revenues $ 549.1 $ 498.1 $ 1,574.9 $ 1,489.1
Long-lived Assets by Geographic Areas	Long-lived assets by country are provided below: September 30, 2017 December 31, 2016 Long-lived assets: United States of America $ 2,101.9 $ 1,754.0 United Kingdom 2,658.7 2,102.5 Other countries 322.9 273.8 Total long-lived assets $ 5,083.5 $ 4,130.3

Basis of Presentation and Sum34

Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Commission amortization period	5 years
Commission expense ratio	1.20%	1.00%
ASU 2016-09 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle			$ 0

Fair Value Measurements - Fina

Fair Value Measurements - Financial Assets and Liabilities Accounted at Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Registered investment companies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Registered investment companies	$ 3.7	$ 3.4

Fair Value Measurements - Summ

Fair Value Measurements - Summary of Carrying Value and Estimated Fair Value of Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Subordinated promissory note receivable, carrying value	$ 94.8	$ 84.1
Subordinated promissory note receivable, estimated fair value	84.9	76.8
Long-term debt excluding capital leases, carrying value	2,279.8	2,277.3
Long-term debt excluding capital leases, estimated fair value	$ 2,456.7	$ 2,402.6

Acquisitions - Additional Info

Acquisitions - Additional Information (Details) - USD ($) $ in Millions

Aug. 31, 2017

Aug. 23, 2017

Aug. 03, 2017

May 19, 2017

Mar. 31, 2017

Feb. 24, 2017

Feb. 16, 2017

Jan. 21, 2017

Sep. 30, 2017

Jun. 30, 2017

Sep. 30, 2016

Sep. 30, 2017

Sep. 30, 2016

Dec. 31, 2016

Business Acquisition [Line Items]

Transaction costs

$ 3.2

$ 0.8

$ 5.9

$ 1

Non tax deductible, goodwill

465.8

465.8

$ 34.9

Current portion of escrow

19.9

19.9

4.1

Escrow deposit

22.1

22.1

6.3

Arium Limited

Business Acquisition [Line Items]

Percentage of voting interests acquired

100.00%

Consideration transferred

$ 1.9

Healix International Holdings Limited

Business Acquisition [Line Items]

Percentage of voting interests acquired

100.00%

Consideration transferred

$ 52.4

Indemnification escrow

$ 7.5

Emergent Network Intelligence Limited

Business Acquisition [Line Items]

Percentage of voting interests acquired

100.00%

Consideration transferred

$ 6.1

Indemnification escrow

$ 0.5

Fintellix Solutions Private Limited

Business Acquisition [Line Items]

Percentage of voting interests acquired

100.00%

Consideration transferred

$ 16.9

Indemnification escrow

$ 1.8

MAKE Consulting A/S

Business Acquisition [Line Items]

Percentage of voting interests acquired

100.00%

Consideration transferred

$ 16.9

Indemnification escrow

$ 2.7

Aerial Imagery

Business Acquisition [Line Items]

Consideration transferred

$ 28.1

Holdback amount

$ 3.1

Tax deductible, goodwill

15.1

15.1

G2 Web Services

Business Acquisition [Line Items]

Percentage of voting interests acquired

100.00%

Consideration transferred

$ 112

Indemnification escrow

$ 5.6

Tax deductible, goodwill

$ 19.9

$ 19.9

Sequel

Business Acquisition [Line Items]

Percentage of voting interests acquired

100.00%

Consideration transferred

$ 320.3

LCI

Business Acquisition [Line Items]

Percentage of voting interests acquired

100.00%

Consideration transferred

$ 150.6

Indemnification escrow

$ 12.8

Quest Offshore

Business Acquisition [Line Items]

Tax deductible, goodwill

$ 6.2

Acquisitions - Assets Acquired

Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill	$ 3,188.8		$ 2,578.1
Cash acquired	(22.1)	$ (1)
Net cash purchase price	674.3	$ 45.2
Total
Business Acquisition [Line Items]
Cash and cash equivalents	22.1
Accounts receivable	21.9
Current assets	6.6
Fixed assets	31.6
Intangible assets	243.9
Goodwill	480.9
Other assets	28.4
Total assets acquired	835.4
Current liabilities	18
Deferred revenues	5.7
Deferred income taxes, net	53.2
Other liabilities	31.2
Total liabilities assumed	108.1
Net assets acquired	727.3
Cash acquired	(22.1)
Net cash purchase price	705.2
Healix International Holdings Limited
Business Acquisition [Line Items]
Cash and cash equivalents	0.9
Accounts receivable	0.9
Current assets	0
Fixed assets	0
Intangible assets	21.1
Goodwill	35.2
Other assets	7.5
Total assets acquired	65.6
Current liabilities	1.1
Deferred revenues	0.1
Deferred income taxes, net	3.6
Other liabilities	7.5
Total liabilities assumed	12.3
Net assets acquired	53.3
Cash acquired	(0.9)
Net cash purchase price	52.4
Fintellix Solutions Private Limited
Business Acquisition [Line Items]
Cash and cash equivalents	1.1
Accounts receivable	2.1
Current assets	0.9
Fixed assets	0.1
Intangible assets	6.6
Goodwill	11.3
Other assets	2
Total assets acquired	24.1
Current liabilities	1.3
Deferred revenues	0.8
Deferred income taxes, net	2.2
Other liabilities	1.8
Total liabilities assumed	6.1
Net assets acquired	18
Cash acquired	(1.1)
Net cash purchase price	16.9
G2 Web Services
Business Acquisition [Line Items]
Cash and cash equivalents	1
Accounts receivable	3.4
Current assets	3.6
Fixed assets	6.4
Intangible assets	41
Goodwill	74.2
Other assets	2.8
Total assets acquired	132.4
Current liabilities	3.2
Deferred revenues	0.4
Deferred income taxes, net	13
Other liabilities	2.8
Total liabilities assumed	19.4
Net assets acquired	113
Cash acquired	(1)
Net cash purchase price	112
Sequel
Business Acquisition [Line Items]
Cash and cash equivalents	16
Accounts receivable	9.5
Current assets	1.4
Fixed assets	7.5
Intangible assets	107.3
Goodwill	226
Other assets	0
Total assets acquired	367.7
Current liabilities	9.9
Deferred revenues	2.4
Deferred income taxes, net	19.1
Other liabilities	0
Total liabilities assumed	31.4
Net assets acquired	336.3
Cash acquired	(16)
Net cash purchase price	320.3
LCI
Business Acquisition [Line Items]
Cash and cash equivalents	1.1
Accounts receivable	3.1
Current assets	0
Fixed assets	5.7
Intangible assets	55.7
Goodwill	100.7
Other assets	12.8
Total assets acquired	179.1
Current liabilities	1.1
Deferred revenues	0.3
Deferred income taxes, net	13.2
Other liabilities	12.8
Total liabilities assumed	27.4
Net assets acquired	151.7
Cash acquired	(1.1)
Net cash purchase price	150.6
Others
Business Acquisition [Line Items]
Cash and cash equivalents	2
Accounts receivable	2.9
Current assets	0.7
Fixed assets	11.9
Intangible assets	12.2
Goodwill	33.5
Other assets	3.3
Total assets acquired	66.5
Current liabilities	1.4
Deferred revenues	1.7
Deferred income taxes, net	2.1
Other liabilities	6.3
Total liabilities assumed	11.5
Net assets acquired	55
Cash acquired	(2)
Net cash purchase price	$ 53

Acquisitions - Intangible Asse

Acquisitions - Intangible Assets Acquired (Details) - 2017 Acquisitions $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 243.9
Technology-related
Business Acquisition [Line Items]
Weighted average useful life (in years)	7 years
Finite-lived intangible assets acquired	$ 66.3
Marketing-related
Business Acquisition [Line Items]
Weighted average useful life (in years)	8 years
Finite-lived intangible assets acquired	$ 15.3
Customer-related
Business Acquisition [Line Items]
Weighted average useful life (in years)	10 years
Finite-lived intangible assets acquired	$ 110
Database-related
Business Acquisition [Line Items]
Weighted average useful life (in years)	12 years
Finite-lived intangible assets acquired	$ 52.3

Discontinued Operations - Addit

Discontinued Operations - Additional Information (Details) - USD ($) $ in Millions	Jun. 01, 2016	Sep. 30, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts and notes receivable, net		$ 94.8	$ 84.1
Verisk Health
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percent of corporate wholly-owned subsidiaries	100.00%
Sale price of disposal group	$ 714.6
Working capital adjustment	$ 5.4
Disposition percent to require prepayment	10.00%
Verisk Health | Carrying value
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operation, consideration		$ 8.4
Verisk Health | Common Stock
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percent of corporate wholly-owned subsidiaries	10.00%
Verisk Health | Interest Rate Floor
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Stated interest rate	9.00%
Verisk Health | Interest Rate Cap
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Stated interest rate	11.00%
Verisk Health | Par Value
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operation, consideration	$ 100
Debt instrument, term (in years)	8 years

Discontinued Operations - Resul

Discontinued Operations - Results from Discontinued Operation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other income:
Investment income and others, net	$ 2.6	$ 2.1	$ 7.9	$ 3
Income from discontinued operations before income taxes	0	0	0	256.5
Provision for income taxes from discontinued operations	$ 0	$ 0	0	(118.6)
Tax effect of gain (loss) from disposal of discontinued operation			118	118
Verisk Health
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues from discontinued operations			0	112.3
Expenses:
Cost of revenues (exclusive of items shown separately below)			0	75.9
Selling, general and administrative			0	36.6
Depreciation and amortization of fixed assets			0	7
Amortization of intangible assets			0	5.9
Total expenses			0	125.4
Operating loss			0	(13.1)
Other income:
Gain on sale			0	269.3
Investment income and others, net			0	0.3
Total other income			0	269.6
Income from discontinued operations before income taxes			0	256.5
Provision for income taxes from discontinued operations			0	(118.6)
Income from discontinued operations, net of tax			$ 0	$ 137.9

Discontinued Operations - Cash

Discontinued Operations - Cash Provided By (Used In) Operating and Investing Activities from Discontinued Operations (Details) - Verisk Health - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net cash provided by operating activities	$ 0	$ 21.4
Net cash used in investing activities	$ 0	$ (10.6)

Goodwill and Intangible Asset43

Goodwill and Intangible Assets - Summary of Change in Goodwill (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 2,578.1
Goodwill, ending balance	3,188.8
Accumulated impairment loss		$ 3.2
Operating Segments
Goodwill [Roll Forward]
Goodwill, beginning balance	2,578.1
Current year acquisitions	480.9
Purchase accounting reclassification	(3.8)
Foreign currency translation	133.6
Goodwill, ending balance	3,188.8
Operating Segments | Risk Assessment
Goodwill [Roll Forward]
Goodwill, beginning balance	71.3
Current year acquisitions	35.2
Purchase accounting reclassification	(1.6)
Foreign currency translation	3.2
Goodwill, ending balance	108.1
Operating Segments | Decision Analytics
Goodwill [Roll Forward]
Goodwill, beginning balance	2,506.8
Current year acquisitions	445.7
Purchase accounting reclassification	(2.2)
Foreign currency translation	130.4
Goodwill, ending balance	$ 3,080.7

Goodwill and Intangible Asset44

Goodwill and Intangible Assets - Additional Information (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, impairment loss		$ 0
Amortization of intangible assets	$ 27,500,000		$ 22,700,000	$ 73,600,000	$ 70,400,000

Goodwill and Intangible Asset45

Goodwill and Intangible Assets - Intangible Assets and Related Accumulated Amortization (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Cost	$ 1,750.1	$ 1,420.4
Accumulated Amortization	(493.9)	(409.6)
Net	$ 1,256.2	$ 1,010.8
Technology-based
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (in years)	7 years	7 years
Cost	$ 387.8	$ 310.9
Accumulated Amortization	(215.9)	(196.6)
Net	$ 171.9	$ 114.3
Marketing-related
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (in years)	17 years	17 years
Cost	$ 257.8	$ 227.5
Accumulated Amortization	(59.9)	(47.5)
Net	$ 197.9	$ 180
Contract-based
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (in years)	6 years	6 years
Cost	$ 5	$ 5
Accumulated Amortization	(5)	(5)
Net	$ 0	$ 0
Customer-related
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (in years)	13 years	14 years
Cost	$ 618.5	$ 483.1
Accumulated Amortization	(161.7)	(128.5)
Net	$ 456.8	$ 354.6
Database-related
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (in years)	19 years	20 years
Cost	$ 481	$ 393.9
Accumulated Amortization	(51.4)	(32)
Net	$ 429.6	$ 361.9

Goodwill and Intangible Asset46

Goodwill and Intangible Assets - Estimated Amortization Expense (Details) $ in Millions	Sep. 30, 2017USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,017	$ 30.5
2,018	121.8
2,019	120.8
2,020	118.2
2,021	108.3
2022 and thereafter	756.6
Total	$ 1,256.2

Income Taxes (Details)

Income Taxes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Effective tax rate	33.19%	26.00%	31.51%	30.29%

Debt - Short-Term and Long-Ter

Debt - Short-Term and Long-Term Debt (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Short-term debt and current portion of long-term debt	$ 602.9	$ 106.8
Capital lease obligations	3.1	7.1
Syndicated revolving credit facility debt issuance costs	(4.2)	(4.2)
Long-term debt	2,278.8	2,280.2
Total debt	$ 2,881.7	2,387
4.000% Senior Notes Due in 2025
Debt Instrument [Line Items]
Long-term debt issuance date	May 15, 2015
Long-term debt maturity date	Jun. 15, 2025
Long-term debt	$ 890.5	$ 889.6
Long term debt instrument interest rate stated percentage	4.00%	4.00%
Unamortized discount on senior notes	$ 9.5	$ 10.4
5.500% Senior Notes Due 2045
Debt Instrument [Line Items]
Long-term debt issuance date	May 15, 2015
Long-term debt maturity date	Jun. 15, 2045
Long-term debt	$ 345.1	$ 345
Long term debt instrument interest rate stated percentage	5.50%	5.50%
Unamortized discount on senior notes	$ 4.9	$ 5
4.125% Senior Notes Due in 2022
Debt Instrument [Line Items]
Long-term debt issuance date	Sep. 12, 2012
Long-term debt maturity date	Sep. 12, 2022
Long-term debt	$ 347	$ 346.5
Long term debt instrument interest rate stated percentage	4.125%	4.125%
Unamortized discount on senior notes	$ 3	$ 3.5
4.875% Senior Notes Due in 2019
Debt Instrument [Line Items]
Long-term debt issuance date	Dec. 8, 2011
Long-term debt maturity date	Jan. 15, 2019
Long-term debt	$ 249.2	$ 248.6
Long term debt instrument interest rate stated percentage	4.875%	4.875%
Unamortized discount on senior notes	$ 0.8	$ 1.4
5.800% Senior Notes Due in 2021
Debt Instrument [Line Items]
Long-term debt issuance date	Apr. 6, 2011
Long-term debt maturity date	May 1, 2021
Long-term debt	$ 448.1	$ 447.6
Long term debt instrument interest rate stated percentage	5.80%	5.80%
Unamortized discount on senior notes	$ 1.9	$ 2.4
Line of Credit
Debt Instrument [Line Items]
Syndicated revolving credit facility	595	100
Capital lease obligations
Debt Instrument [Line Items]
Capital lease obligations	$ 7.9	$ 6.8

Debt - Additional Information

Debt - Additional Information (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term debt, gross	$ 2,300,000,000	$ 2,300,000,000
Line of Credit
Debt Instrument [Line Items]
Syndicated revolving credit facility	595,000,000	$ 100,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,500,000,000

Stockholders' Equity - Additio

Stockholders' Equity - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017USD ($)director$ / sharesshares	Sep. 30, 2016shares	Sep. 30, 2017USD ($)director$ / sharesshares	Sep. 30, 2016shares	Dec. 31, 2016USD ($)shares
Class of Stock [Line Items]
Common stock, authorized (in shares)	2,000,000,000		2,000,000,000		2,000,000,000
Number of company directors | director	13		13
Preferred stock, authorized (in shares)	80,000,000		80,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.001		$ 0.001
Cumulative value of shares repurchased | $	$ 2,433,800,000		$ 2,433,800,000
Treasury stock, shares acquired (in shares)			3,356,360		4,325,548
Treasury stock acquired | $			$ 269,800,000		$ 333,300,000
Treasury stock (in shares)	379,486,284		379,486,284		377,087,266
Reissued of common stock (in shares)			957,342
Weighted average price per share (in dollars per share) | $ / shares	$ 8.07		$ 8.07
Common stock shares excluded from diluted EPS (in shares)	2,471,487	1,239,406	2,158,723	1,890,460
Common Stock Issued
Class of Stock [Line Items]
Common stock, authorized (in shares)	2,000,000,000		2,000,000,000
Share repurchase program, authorized capacity | $	$ 2,800,000,000		$ 2,800,000,000
Available shares for repurchase | $	$ 366,200,000		$ 366,200,000

Stockholders' Equity - Computa

Stockholders' Equity - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Numerator used in basic and diluted EPS:
Income from continuing operations	$ 120.7	$ 127.6	$ 350.5	$ 344
Income from discontinued operations	0	0	0	137.9
Net income	$ 120.7	$ 127.6	$ 350.5	$ 481.9	$ 591.2
Denominator:
Weighted average number of common shares used in basic EPS (in shares)	164,577,575	168,874,129	165,314,267	168,541,399
Effect of dilutive shares:
Potential common shares issuable from stock options and stock awards (in shares)	3,379,483	2,911,771	3,493,138	2,953,790
Weighted average number of common shares and dilutive potential common shares used in diluted EPS (in shares)	167,957,058	171,785,900	168,807,405	171,495,189

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Accumulated Other Comprehensive Losses (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Equity [Abstract]
Foreign currency translation adjustment	$ (356.5)	$ (561.4)
Unrealized holding gains on available-for-sale securities, net of tax	0.5	0.3
Pension and postretirement adjustment, net of tax	(87.3)	(89.7)
Accumulated other comprehensive losses	$ (443.3)	$ (650.8)

Stockholders' Equity - Before

Stockholders' Equity - Before Tax and After Tax Amounts of Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Before Tax
Foreign currency translation adjustment	$ 82.2	$ (62.1)	$ 204.9	$ (278.6)
Unrealized holding gain on available-for-sale securities before reclassifications		0.7	0.3	0.8
Amount reclassified from accumulated other comprehensive losses		(0.6)		(0.3)
Unrealized holding gain on available-for-sale securities		0.1	0.3	0.5
Pension and postretirement adjustment before reclassifications	2.4	1.8	7.4	5.4
Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive losses	(1.2)	(0.9)	(3.7)	(2.7)
Pension and postretirement adjustment	1.2	0.9	3.7	2.7
Total other comprehensive gain	83.4	(61.1)	208.9	(275.4)
Tax (Expense) Benefit
Foreign currency translation adjustment	0	0	0	0
Unrealized holding gain on available-for-sale securities before reclassifications		(0.3)	(0.1)	(0.3)
Amount reclassified from accumulated other comprehensive losses		0.3		0.1
Unrealized holding gain on available-for-sale securities		0	(0.1)	(0.2)
Pension and postretirement adjustment before reclassifications	(0.7)	(1)	(2.7)	(2.3)
Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive losses	0.4	0.3	1.4	1
Pension and postretirement adjustment	(0.3)	(0.7)	(1.3)	(1.3)
Total other comprehensive loss	(0.3)	(0.7)	(1.4)	(1.5)
After Tax
Foreign currency translation adjustment	82.2	(62.1)	204.9	(278.6)
Unrealized holding gain on available-for-sale securities before reclassifications		0.4	0.2	0.5
Amount reclassified from accumulated other comprehensive losses		(0.3)		(0.2)
Unrealized holding gain on available-for-sale securities	0	0.1	0.2	0.3
Pension and postretirement adjustment before reclassifications	1.7	0.8	4.7	3.1
Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive losses	(0.8)	(0.6)	(2.3)	(1.7)
Pension and postretirement adjustment	0.9	0.2	2.4	1.4
Total other comprehensive income (loss)	$ 83.1	$ (61.8)	$ 207.5	$ (276.9)	$ (408.8)

Equity Compensation Plans - Ad

Equity Compensation Plans - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	May 30, 2017	Apr. 01, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense			$ 24.2	$ 23.8
Common stock issued, discounted price (in dollars per share)			$ 78.77	$ 76.64
Proceeds from stock options exercised			$ 26	$ 32.6
Nonqualified stock options contractual term (in years)			10 years
Shares reissued from treasury stock (in shares)			773,206		1,409,803
Granted (in shares)			1,430,079
Excess tax benefit from stock options exercised				18.4
Total unrecognized compensation cost related to nonvested share-based compensation arrangements			$ 76.1
Unrecognized compensation cost weighted average period (in years)			2 years 8 months
Nonvested stock options (in shares)			2,943,743
Stock options expected to vest (in shares)			2,507,335
Total fair value of options vested			$ 12.3	10.5
Grant date fair value restricted stock vested			$ 13.1	$ 10.6
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reissued from treasury stock (in shares)	372	3,201	3,573
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0	0	1,430,079
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reissued from treasury stock (in shares)			141,961		169,365
Restricted stock options (in shares)			588,612
Stock options expected to vest (in shares)			497,670
Employee stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued in period (in shares)			23,391	23,168
KSOP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense			$ 13	$ 9.2
Shares issued in period (in shares)			0	143,439	181,198
Common stock issued, discounted price (in dollars per share)				$ 79.38
2013 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved and available for future issuance (in shares)			6,798,916
One-year Graded Vesting | Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reissued from treasury stock (in shares)		0
One-year Graded Vesting | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		75,133

Equity Compensation Plans - Su

Equity Compensation Plans - Summary of Equity Awards Granted (Details) - shares	Jul. 01, 2017	May 30, 2017	Apr. 01, 2017	Sep. 30, 2017	Mar. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Stock options (in shares)						1,430,079
Common stock (in shares)						773,206	1,409,803
Four Year Graded Vesting | January 1 to March 31, 2017
Class of Stock [Line Items]
Equity award contractual term (in years)					4 years
Four Year Graded Vesting | April 1, 2017
Class of Stock [Line Items]
Equity award contractual term (in years)			4 years
Four Year Graded Vesting | July 1 to September 30, 2017 [Member]
Class of Stock [Line Items]
Equity award contractual term (in years)					4 years
Two Year Graded Vesting | April 1, 2017
Class of Stock [Line Items]
Equity award contractual term (in years)			2 years
One Year Graded Vesting | July 1, 2017
Class of Stock [Line Items]
Equity award contractual term (in years)	1 year
Stock options
Class of Stock [Line Items]
Stock options (in shares)		0	0			1,430,079
Stock options | Four Year Graded Vesting
Class of Stock [Line Items]
Stock options (in shares)			1,300,007	5,240	2,669
Stock options | Two Year Graded Vesting
Class of Stock [Line Items]
Stock options (in shares)			47,030
Stock options | One Year Graded Vesting
Class of Stock [Line Items]
Stock options (in shares)			75,133
Restricted stock
Class of Stock [Line Items]
Restricted stock (in shares)		0	1,304			272,976
Common stock (in shares)						141,961	169,365
Restricted stock | Four Year Graded Vesting
Class of Stock [Line Items]
Restricted stock (in shares)			248,489	1,078	525
Restricted stock | Two Year Graded Vesting
Class of Stock [Line Items]
Restricted stock (in shares)			11,272
Restricted stock | One Year Graded Vesting
Class of Stock [Line Items]
Restricted stock (in shares)			10,308
Common Stock
Class of Stock [Line Items]
Common stock (in shares)		372	3,201			3,573
Common Stock | Four Year Graded Vesting
Class of Stock [Line Items]
Common stock (in shares)			0	0	0
Common Stock | Two Year Graded Vesting
Class of Stock [Line Items]
Common stock (in shares)			0
Common Stock | One Year Graded Vesting
Class of Stock [Line Items]
Common stock (in shares)			0

Equity Compensation Plans - Bl

Equity Compensation Plans - Black Scholes (Details) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Option pricing model	Black-Scholes	Black-Scholes
Expected volatility	18.72%	20.27%
Risk-free interest rate	1.82%	1.14%
Expected term (in years)	4 years 6 months	4 years 6 months
Dividend yield	0.00%	0.00%
Weighted average grant date fair value per stock option (in dollars per share)	$ 15.71	$ 15.34

Equity Compensation Plans - 57

Equity Compensation Plans - Summary of Stock Options Outstanding (Details) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)$ / sharesshares	Dec. 31, 2016USD ($)$ / sharesshares
Number of Options
Outstanding, beginning balance (in shares) | shares	8,770,917
Granted (in shares) | shares	1,430,079
Exercised (in shares) | shares	(773,206)
Cancelled or expired (in shares) | shares	(156,963)
Outstanding, ending balance (in shares) | shares	9,270,827
Options exercisable (in shares) | shares	6,170,584	6,148,349
Weighted Average Exercise Price
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 46.67
Granted (in dollars per share) | $ / shares	81.32
Exercised (in dollars per share) | $ / shares	37.24
Cancelled or expired (in dollars per share) | $ / shares	76.40
Outstanding, ending balance (in dollars per share) | $ / shares	52.29
Options exercisable (in dollars per share) | $ / shares	$ 41.08	$ 35.35
Aggregate Intrinsic Value
Outstanding, beginning balance | $	$ 302.6
Exercised | $	35
Outstanding, ending balance | $	286.4
Aggregate intrinsic value, options exercisable | $	$ 259.8	$ 281.7

Equity Compensation Plans - 58

Equity Compensation Plans - Summary of Restricted Stock Awards (Details) - $ / shares	May 30, 2017	Apr. 01, 2017	Sep. 30, 2017
Number of Shares
Outstanding, beginning balance (in shares)			8,770,917
Outstanding, ending balance (in shares)			9,270,827
Restricted stock
Number of Shares
Outstanding, beginning balance (in shares)			537,667
Granted (in shares)	0	1,304	272,976
Restricted stock vested (in shares)			(193,239)
Forfeited (in shares)			(28,572)
Outstanding, ending balance (in shares)			588,832
Weighted Average Grant Date Fair Value Per Share
Outstanding, beginning balance (in dollars per share)			$ 73.34
Granted (in dollars per share)			81.29
Vested (in dollars per share)			70.14
Forfeited (in dollars per share)			76.87
Outstanding, ending balance (in dollars per share)			$ 77.83

Pension and Postretirement Be59

Pension and Postretirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Pension Plan and SERP
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 4.3	$ 4.9	$ 12.9	$ 14.5
Expected return on plan assets	(7.8)	(7.9)	(23.3)	(23.8)
Amortization of prior service credit			0.1	0
Amortization of net actuarial loss	1.1	0.9	3.4	2.5
Net periodic (benefit) cost	(2.4)	(2.1)	(6.9)	(6.8)
Employer contributions, net	0.3	0.3	0.8	0.8
Postretirement Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost	0.1	0.1	0.3	0.3
Expected return on plan assets	(0.1)	(0.1)	(0.3)	(0.4)
Amortization of prior service credit			(0.1)	(0.1)
Amortization of net actuarial loss	0.1	0	0.3	0.3
Net periodic (benefit) cost	0.1	0	0.2	0.1
Employer contributions, net	$ (0.2)	$ 0.3	$ 0.4	$ 0.5

Segment Reporting - Additional

Segment Reporting - Additional Information (Details) - segment	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting [Abstract]
Number of operating segments	2
Revenue outside of US	21.30%	22.00%
Percentage of revenue outside of US	5.00%	5.00%

Segment Reporting - Reconcilia

Segment Reporting - Reconciliations Income Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Revenues	$ 549.1	$ 498.1	$ 1,574.9	$ 1,489.1
Expenses:
Cost of revenues (exclusive of items shown separately below)	(198.5)	(169.7)	(575.1)	(521.4)
Selling, general and administrative	(80.9)	(77.8)	(235.6)	(224.4)
Investment income and others, net	2.6	2.1	7.9	3
EBITDA from discontinued operations (including the gain on sale)			0	269.4
EBITDA	272.3	252.7	772.1	1,015.7
Depreciation and amortization of fixed assets	(33.8)	(29.5)	(99.4)	(90.7)
Amortization of intangible assets	(27.5)	(22.7)	(73.6)	(70.4)
Operating income	208.4	198.4	591.2	582.2
Interest expense	(30.3)	(28.1)	(87.3)	(91.7)
Income from continuing operations before income taxes	180.7	172.4	511.8	493.5
Decision Analytics
Segment Reporting Information [Line Items]
Revenues	355.9	317.3	999.7	947.4
Expenses:
Cost of revenues (exclusive of items shown separately below)	(141.7)	(117.6)	(405.3)	(362.6)
Selling, general and administrative	(60.4)	(55.4)	(174.2)	(161.8)
Investment income and others, net	2.5	0.6	8	1.6
EBITDA from discontinued operations (including the gain on sale)			0	269.4
EBITDA	156.3	144.9	428.2	694
Depreciation and amortization of fixed assets	(26.2)	(22.6)	(76.7)	(69.9)
Amortization of intangible assets	(26.6)	(22.5)	(71)	(70)
Operating income	101	99.2	272.5	283.1
Risk Assessment
Segment Reporting Information [Line Items]
Revenues	193.2	180.8	575.2	541.7
Expenses:
Cost of revenues (exclusive of items shown separately below)	(56.8)	(52.1)	(169.8)	(158.8)
Selling, general and administrative	(20.5)	(22.4)	(61.4)	(62.6)
Investment income and others, net	0.1	1.5	(0.1)	1.4
EBITDA from discontinued operations (including the gain on sale)			0	0
EBITDA	116	107.8	343.9	321.7
Depreciation and amortization of fixed assets	(7.6)	(6.9)	(22.7)	(20.8)
Amortization of intangible assets	(0.9)	(0.2)	(2.6)	(0.4)
Operating income	$ 107.4	$ 99.2	$ 318.7	$ 299.1

Segment Reporting - Operating

Segment Reporting - Operating Segment Revenue by Type of Service (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Revenues	$ 549.1	$ 498.1	$ 1,574.9	$ 1,489.1
Decision Analytics
Segment Reporting Information [Line Items]
Revenues	355.9	317.3	999.7	947.4
Decision Analytics | Insurance
Segment Reporting Information [Line Items]
Revenues	203.9	174.4	573.5	521.4
Decision Analytics | Energy and specialized markets
Segment Reporting Information [Line Items]
Revenues	111.4	109.1	328	333.2
Decision Analytics | Financial services
Segment Reporting Information [Line Items]
Revenues	40.6	33.8	98.2	92.8
Risk Assessment
Segment Reporting Information [Line Items]
Revenues	193.2	180.8	575.2	541.7
Risk Assessment | Industry-standard insurance programs
Segment Reporting Information [Line Items]
Revenues	149	138.2	442.7	414.2
Risk Assessment | Property-specific rating and underwriting information
Segment Reporting Information [Line Items]
Revenues	$ 44.2	$ 42.6	$ 132.5	$ 127.5

Segment Reporting - Regional l

Segment Reporting - Regional long-lived assets by country (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Long-lived assets	$ 5,083.5	$ 4,130.3
United States
Segment Reporting Information [Line Items]
Long-lived assets	2,101.9	1,754
United Kingdom
Segment Reporting Information [Line Items]
Long-lived assets	2,658.7	2,102.5
Other countries
Segment Reporting Information [Line Items]
Long-lived assets	$ 322.9	$ 273.8

Related Parties (Details)

Related Parties (Details) - relatedparty	Sep. 30, 2017	Dec. 31, 2016
Related Party Transactions [Abstract]
Percentage of ownership on outstanding common stock required to become related party (more than)	5.00%	5.00%
Number of related parties	0	0

Commitments and Contingencies (

Commitments and Contingencies (Details)	Nov. 05, 2015claim	Oct. 08, 2015patent	Aug. 01, 2014plaintiffdefendant	Sep. 30, 2017USD ($)	Mar. 11, 2014
Loss Contingencies [Line Items]
Number of putative classes | claim	2
Interthinx
Loss Contingencies [Line Items]
Percent of subsidiary stock sold					100.00%
Intellicorp Records | Minimum
Loss Contingencies [Line Items]
Loss contingency, damages sought (dollars per violation)				$ 100
Intellicorp Records | Maximum
Loss Contingencies [Line Items]
Loss contingency, damages sought (dollars per violation)				$ 1,000
Xactware Solutions
Loss Contingencies [Line Items]
Patents allegedly infringed, number | patent		7
Interthinx
Loss Contingencies [Line Items]
Employment period				3 years
Insurance Services Office
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff			19
Number of defendants (more than) | defendant			120