Variable Rate [Domain] Variable Rate [Domain] Stock appreciation rights Stock Appreciation Rights (SARs) [Member] Pay vs Performance Disclosure [Line Items] Statistical Measurement [Domain] Statistical Measurement [Domain] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Underlying Security Market Price Change Underlying Security Market Price Change, Percent Award Type [Domain] Award Type [Domain] Fair Value as of Grant Date Award Grant Date Fair Value Revenue, remaining performance obligation, expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Contractual annualized interest rate Line of Credit Facility, Interest Rate at Period End Debt Debt Disclosure [Text Block] 2020 Credit Agreement 2020 Credit Agreement [Member] 2020 Credit Agreement Statement of Stockholders' Equity [Abstract] Acquisition of business Payments to Acquire Businesses, Gross Revolving credit facility Revolving Credit Facility [Member] Effects of exchange rates on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Segment Reporting [Abstract] Segment Reporting [Abstract] Restatement Determination Date: Restatement Determination Date [Axis] Insider Trading Policies and Procedures [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Equity Equity [Text Block] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Geographical [Axis] Geographical [Axis] Income Taxes Income Tax Disclosure [Text Block] Current liabilities: Liabilities, Current [Abstract] Goodwill, accumulated impairment losses Goodwill, Impaired, Accumulated Impairment Loss Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, $0.01 par value, 5,000,000 shares authorized; none issued or outstanding Preferred Stock, Value, Issued Intersegment Eliminations Intersegment Eliminations [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Proceeds from sale of divested operation Proceeds from Divestiture of Businesses Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Line of credit facility, additional borrowing capacity Line of Credit Facility, Additional Borrowing Capacity Line of Credit Facility, Additional Borrowing Capacity Diluted (in dollars per share) Diluted income per share (in dollars per share) Earnings Per Share, Diluted PEO Total Compensation Amount PEO Total Compensation Amount Fees receivable, net of allowances of $9,000 for both periods Accounts Receivable, after Allowance for Credit Loss, Current Goodwill [Roll Forward] Goodwill [Roll Forward] Interest rate swaps – net change in deferred gain or loss Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] TalentNeuron TalentNeuron [Member] TalentNeuron Treasury stock, common shares (in shares) Treasury Stock, Common, Shares Line of Credit Line of Credit [Member] Trading Symbol Trading Symbol 2024 Credit Agreement 2024 Credit Agreement [Member] 2024 Credit Agreement Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Net income Net income Net income used for calculating basic and diluted income per share Net Income (Loss) Proceeds from event cancellation insurance claims Unusual or Infrequent Item, or Both, Insurance Proceeds Total current liabilities Liabilities, Current SOFR Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Derivative Contract [Domain] Derivative Contract [Domain] Schedule of Notional Amounts of Outstanding Derivative Positions Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Company Selected Measure Name Company Selected Measure Name Leases Lessee, Operating Leases [Text Block] Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Liabilities and Stockholders’ Equity Liabilities and Equity [Abstract] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Common share repurchases Stock Repurchased During Period, Value Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Stockholders’ Equity Equity, Attributable to Parent [Abstract] Reclassifications from AOCL to income Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Total contract liabilities Contract with Customer, Liability Unrealized Loss Recorded in AOCL, net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Other Other Intangible Assets [Member] Schedule Of Basic And Diluted Earnings Per Share Calculations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Cost of services and product development Cost of services and product development - unallocated Cost of Goods and Services Sold Executive Category: Executive Category [Axis] Debt Instrument, Redemption, Option [Axis] Debt Instrument, Redemption, Option [Axis] Debt Instrument, Redemption, Option Level 1 Fair Value, Inputs, Level 1 [Member] Pension plans – net change in deferred actuarial loss Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Name Measure Name Name Forgone Recovery, Individual Name Goodwill Beginning balance Ending balance Goodwill Equity Components [Axis] Equity Components [Axis] Types of Financial Instruments [Domain] Financial Instruments [Domain] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Number of shares available for grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Fair Value Asset (Liability), Net Derivative Assets (Liabilities), at Fair Value, Net Underlying Securities Award Underlying Securities Amount Entity Small Business Entity Small Business 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Four Local Phone Number Local Phone Number Fees receivable, net Increase (Decrease) in Accounts Receivable Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Letter of Credit Letter of Credit [Member] Interest rate swap contracts total notional value Notional Amounts Derivative, Notional Amount Selling, general and administrative Selling, General and Administrative Expenses [Member] Open Market Purchases, Excluded Open Market Purchases, Excluded [Member] Open Market Purchases, Excluded Transferred at a point in time Transferred at Point in Time [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Operating lease liabilities Operating lease liabilities Operating Lease, Liability, Noncurrent Restricted stock units Restricted Stock Units (RSUs) [Member] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Debt term Debt Instrument, Term Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Depreciation Depreciation Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Income Statement Location [Axis] Income Statement Location [Axis] Other International Other International [Member] -- None. No documentation exists for this element. -- Foreign currency forwards Foreign currency forward contracts Foreign Exchange Forward [Member] Revenues Revenues Changes in assets and liabilities, net of acquisitions and divestitures: Increase (Decrease) in Operating Capital, Net of Acquisition [Abstract] -- None. No documentation exists for this element. -- Other Other Long Term Debt [Member] Other Long Term Debt [Member] Product and Service [Domain] Product and Service [Domain] Other Performance Measure, Amount Other Performance Measure, Amount Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Lease Costs Lease, Cost [Table Text Block] Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Contract liabilities: Contract with Customer, Liability [Abstract] Award Type [Axis] Award Type [Axis] Antidilutive securities excluded from computation of (loss) income per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Document Quarterly Report Document Quarterly Report Interest expense, net Interest Expense Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Hedging Designation [Axis] Hedging Designation [Axis] Goodwill [Line Items] Goodwill [Line Items] Right-of-use assets obtained in exchange for new operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 2024 (remaining nine months) Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Trading Arrangement: Trading Arrangement [Axis] Use of estimates Use of Estimates, Policy [Policy Text Block] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Leases Lessee, Finance Leases [Text Block] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Economic Development Loan 2 Economic Development Loan 2 [Member] Economic Development Loan 2 [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity File Number Entity File Number Accounts payable and accrued liabilities Operating Lease, Liability, Current Term of contract Derivative, Term of Contract Cost for subleasing activities Operating Lease, Cost, Subleasing Activities Operating Lease, Cost, Subleasing Activities Technology-related Computer Software, Intangible Asset [Member] Amortization of intangibles Amortization of Intangible Assets Entity Shell Company Entity Shell Company Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Europe, Middle East and Africa Europe Middle East Africa [Member] -- None. No documentation exists for this element. -- Finite-lived intangible assets, net Finite-Lived Intangible Assets, Net Adoption of new accounting standards New Accounting Pronouncements, Policy [Policy Text Block] Restatement Determination Date Restatement Determination Date Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents and restricted cash, beginning of period Cash and cash equivalents and restricted cash, end of period Cash and cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization 2028 Notes Senior Notes Due 2028 [Member] Senior Notes Due 2028 Fair Value Debt Instrument, Fair Value Disclosure Finite-lived Intangible Assets [Roll Forward] Finite-Lived Intangible Assets [Roll Forward] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Lease cost Variable Lease, Cost Operating lease cost Operating Lease, Cost Common stock, shares issued (in shares) Common Stock, Shares, Issued Connecticut Economic Development Program Connecticut Economic Development Program [Member] -- None. No documentation exists for this element. -- Purchase price Business Combination, Consideration Transferred Line of credit facility, commitment fee percentage Line of Credit Facility, Commitment Fee Percentage Deferred revenues Deferred revenues (current liability) Contract with Customer, Liability, Current Treasury stock, at cost, 85,390,263 and 85,264,526 common shares, respectively Treasury Stock, Common, Value Security Exchange Name Security Exchange Name Carrying Amount Long-Term Debt Total Assets Assets, Fair Value Disclosure Research Research Research Segment [Member] -- None. No documentation exists for this element. -- Accrued liabilities Accrued Liabilities Current [Member] -- None. No documentation exists for this element. -- Selling, general and administrative Selling, General and Administrative Expense Accumulated other comprehensive loss, net Accumulated Other Comprehensive Income (Loss), Net of Tax Employee Stock Option Employee Stock Option [Member] Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Derivatives and Hedging Derivative Instruments and Hedging Activities Disclosure [Text Block] Total costs and expenses Costs and Expenses Maximum Maximum [Member] Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Document Type Document Type Debt instrument, issue price, percent Debt Instrument, Issue Price, Percentage Debt Instrument, Issue Price, Percentage Tabular List, Table Tabular List [Table Text Block] Gartner Research Products Gartner Research Products [Member] Gartner Research Products Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Net (decrease) increase in cash and cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Basis of presentation Basis of Accounting, Policy [Policy Text Block] Business Acquisition [Axis] Business Acquisition [Axis] Fees receivable, allowance Accounts Receivable, Allowance for Credit Loss, Current Derivative [Table] Derivative [Table] Schedule of amortizable intangible assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Variable Rate [Axis] Variable Rate [Axis] Accounts payable and accrued and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Income Statement [Abstract] Income Statement [Abstract] Variable Rate Component One Variable Rate Component One [Member] Variable Rate Component One Costs and expenses: Costs and Expenses [Abstract] Title of 12(b) Security Title of 12(b) Security Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Sublease income Sublease Income Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Operating Segments Operating Segments [Member] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Fixed interest rate Derivative, Fixed Interest Rate 2029 Notes Senior Notes Due 2029 [Member] Senior Notes Due 2029 Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Gain on event cancellation insurance claims Gain on event cancellation insurance claims Insured Event, Gain (Loss) Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Entity Tax Identification Number Entity Tax Identification Number Foreign currency translation impact Goodwill, Foreign Currency Translation Gain (Loss) Net balance sheet carrying amount Debt, Long-Term and Short-Term, Combined Amount Total lease cost, net Lease, Cost Statistical Measurement [Axis] Statistical Measurement [Axis] Financial Instrument [Axis] Financial Instrument [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Entity Interactive Data Current Entity Interactive Data Current Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Total Shareholder Return Amount Total Shareholder Return Amount Purchases of treasury stock Cash paid for repurchased shares Payments for Repurchase of Common Stock Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Acquisition and Divestiture Mergers, Acquisitions and Dispositions Disclosures [Text Block] Other assets Other Assets [Member] Segments [Domain] Segments [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Consolidation Items [Domain] Consolidation Items [Domain] Accumulated earnings Retained Earnings (Accumulated Deficit) Measure: Measure [Axis] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Name Outstanding Recovery, Individual Name Revenue recognition Revenue from Contract with Customer [Policy Text Block] Aggregate principal amount Debt Instrument, Face Amount Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Research Research Revenue [Member] Research Revenue Current assets: Assets, Current [Abstract] Fees receivable, gross Accounts Receivable, before Allowance for Credit Loss, Current Leases [Abstract] Cash receipts from sublease arrangements Proceeds from Lease Payment, Operating Activity Stock repurchase program, additional authorized amount Stock Repurchase Program, Additional Authorized Amount Stock Repurchase Program, Additional Authorized Amount Entity Address, State or Province Entity Address, State or Province Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Schedule of Carrying Values and Estimated Fair Values of Debt Instruments Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Variable Rate Components [Domain] Variable Rate Components [Domain] Variable Rate Components [Domain] 2025 Finite-Lived Intangible Asset, Expected Amortization, Year One Cash paid for amounts included in the measurement of operating lease liabilities Operating Lease, Payments Schedule Of Stock-based Compensation Expense By Award Type Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Disposal Group Name [Domain] Disposal Group Name [Domain] Loss on impairment of lease related assets Loss on impairment of lease related assets, net Operating Lease, Impairment Loss PEO PEO [Member] Debt Instrument Redemption Option One Debt Instrument Redemption Option One [Member] Debt Instrument Redemption Option One Deferred commissions Other Deferred Costs, Net Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Common stock, par value (in dollars per share) Common stock par value (in dollars per share) Common Stock, Par or Stated Value Per Share Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Option to terminate, term Lessee, Operating Lease, Option to Terminate, Term Lessee, Operating Lease, Option to Terminate, Term Cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Interest rate swaps Interest rate swap contracts Interest Rate Swap [Member] Debt Instrument [Axis] Debt Instrument [Axis] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Total operating lease liabilities included in the Condensed Consolidated Balance Sheets Operating Lease, Liability Credit Facility [Axis] Credit Facility [Axis] Total Liabilities Liabilities Business and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Sale of business, consideration Disposal Group, Including Discontinued Operation, Consideration Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Accumulated Other Comprehensive Loss, Net AOCI Attributable to Parent [Member] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] All Executive Categories All Executive Categories [Member] Non-current deferred revenues recorded in Other liabilities Contract with Customer, Liability, Noncurrent Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Defined Benefit Pension Plans Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Variable Rate Components [Axis] Variable Rate Components [Axis] Variable Rate Components Number of reportable segments Number of Reportable Segments Earnings Per Share [Abstract] Earnings Per Share [Abstract] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Common stock, $0.0005 par value, 250,000,000 shares authorized; 163,602,067 shares issued for both periods Common Stock, Value, Issued Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Additions to property, equipment and leasehold improvements Payments for Capital Improvements Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Payment for contingent consideration liability, investing activities Payment for Contingent Consideration Liability, Investing Activities Senior Notes Senior Notes [Member] Segments Segment Reporting, Policy [Policy Text Block] Total current assets Assets, Current Revenue from Contract with Customer [Abstract] All Individuals All Individuals [Member] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Unrecognized tax benefits reductions resulting from anticipated closure of audits and the expiration of certain statutes of limitation Unrecognized Tax Benefits, Reductions Resulting from Settlements with Taxing Authorities and Lapse of Applicable Statute of Limitations Unrecognized Tax Benefits, Reductions Resulting from Settlements with Taxing Authorities and Lapse of Applicable Statute of Limitations Other income (expense), net Other Nonoperating Income (Expense) Entity Filer Category Entity Filer Category Schedule Of Share Repurchase Activity Class of Treasury Stock [Table Text Block] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Statement [Table] Statement [Table] Current Fiscal Year End Date Current Fiscal Year End Date Stock repurchase program, authorized amount Stock Repurchase Program, Authorized Amount Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Supplemental Balance Sheet Information Assets And Liabilities, Leases [Table Text Block] Assets And Liabilities, Leases [Table Text Block] Unrecognized tax benefits Unrecognized Tax Benefits PEO Name PEO Name Schedule Of The Changes In Accumulated Other Comprehensive Loss By Component (Net Of Tax) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Right-of-use assets Right-of-use Assets [Member] Right-of-use Assets Prepaid expenses and other current assets Restricted Cash, Current Schedule of changes to the carrying amount of goodwill by reporting unit Schedule of Goodwill [Table Text Block] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Schedule of estimated future amortization expense by year Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Contract assets recorded in Prepaid expenses and other current assets Contract with Customer, Asset, before Allowance for Credit Loss Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Depreciation and amortization Depreciation, Depletion and Amortization Debt instrument, fixed interest rate Debt Instrument, Interest Rate, Stated Percentage Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Transferred over time Transferred over Time [Member] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Gain from sale of divested operation Gain (Loss) on Disposition of Business SOFR, plus additional 1% credit spread Secured Overnight Financing Rate (SOFR), Plus Additional Rate [Member] Secured Overnight Financing Rate (SOFR), Plus Additional Rate Business Combination and Asset Acquisition [Abstract] Total Stockholders’ Equity Beginning balance Ending balance Equity, Attributable to Parent Consolidation Items [Axis] Consolidation Items [Axis] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Goodwill impairment Goodwill, Impairment Loss Deferred revenues Increase (Decrease) in Deferred Revenue Valuation allowance Deferred Tax Assets, Valuation Allowance Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Revenue recognized previously attributable to deferred revenues Contract with Customer, Liability, Revenue Recognized Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Interest Rate Swaps Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Conferences Conferences Conferences [Member] -- None. No documentation exists for this element. -- Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Denominator: Denominator: [Abstract] -- None. No documentation exists for this element. -- Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Change in AOCL before reclassifications to income OCI, before Reclassifications, before Tax, Attributable to Parent Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Hedging Designation [Domain] Hedging Designation [Domain] Level 2 Fair Value, Inputs, Level 2 [Member] Entity Emerging Growth Company Entity Emerging Growth Company Less: deferred financing fees Debt Issuance Costs, Line of Credit Arrangements, Net Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Issuances under stock plans Shares Granted, Value, Share-Based Payment Arrangement, after Forfeiture Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance Derivative Instruments, Gain (Loss) [Table Text Block] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Document Fiscal Period Focus Document Fiscal Period Focus Remaining amortization period Finite-Lived Intangible Asset, Useful Life Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Title Trading Arrangement, Individual Title Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Schedule of Disaggregation of Revenue by Reportable Segment Revenue from External Customers by Geographic Areas [Table Text Block] Common Stock Common Stock [Member] Individual: Individual [Axis] City Area Code City Area Code Entity Address, Postal Zip Code Entity Address, Postal Zip Code Computation of Earnings Per Share Earnings Per Share [Text Block] Product and Service [Axis] Product and Service [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Income Statement Location [Domain] Income Statement Location [Domain] Document Fiscal Year Focus Document Fiscal Year Focus Geographical [Domain] Geographical [Domain] Debt Instrument, Redemption, Option [Domain] Debt Instrument, Redemption, Option [Domain] Debt Instrument, Redemption, Option [Domain] Minimum Minimum [Member] Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Property, equipment and leasehold improvements, net Property, Plant and Equipment, Net Share Repurchase Program [Domain] Share Repurchase Program [Domain] Exercise Price Award Exercise Price Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] (Gain) loss on de-designated swaps Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Loss to be reclassified within twelve months Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months Percent of target bonus charges allocated to segments Segment Reporting Information, Percent of Target Bonus Charges Allocated to Segments Segment Reporting Information, Percent of Target Bonus Charges Allocated to Segments Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Assets Assets [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Total Liabilities Liabilities, Fair Value Disclosure Other current assets Other Current Assets [Member] Cash used in financing activities Net Cash Provided by (Used in) Financing Activities Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Contingencies Commitments and Contingencies Disclosure [Text Block] Percent of outstanding membership interests acquired Business Acquisition, Percentage of Voting Interests Acquired Accumulated Earnings Retained Earnings [Member] Current portion of long-term debt Long-Term Debt, Current Maturities Schedule Of Stock-Based Compensation Expense By Expense Category Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Schedule of Reconciliation of Segment Gross Contribution to Net Income Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Total Liabilities and Stockholders’ Equity Liabilities and Equity Other assets Other Assets, Noncurrent Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount 2030 Notes Senior Notes Due 2030 [Member] Senior Notes Due 2030 Basic (in dollars per share) Basic income per share (in dollars per share) Earnings Per Share, Basic Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Assets: Contract with Customer, Asset, after Allowance for Credit Loss [Abstract] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Deferred compensation plan assets Plan Assets [Member] -- None. No documentation exists for this element. -- Deferred tax asset Deferred Tax Assets, Net Arrangement Duration Trading Arrangement Duration Interest expense and other, net Interest Expense and Other Nonoperating Income Interest Expense and Other Nonoperating Income Entity Address, City or Town Entity Address, City or Town Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Restrictions on Cash and Cash Equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Schedule of Segment Reporting Information by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Principles of consolidation Consolidation, Policy [Policy Text Block] Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Document Transition Report Document Transition Report Award Timing Predetermined Award Timing Predetermined [Flag] Interest expense (income), net Interest Expense [Member] Unsecured Debt Unsecured Debt [Member] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Stock repurchase program, remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Termination Date Trading Arrangement Termination Date Common stock, shares authorized (in shares) Common Stock, Shares Authorized Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Term Loan Facility Term Loan Facility [Member] Term Loan Facility Derivative Instrument [Axis] Derivative Instrument [Axis] Principal amount outstanding Long-Term Debt, Gross Adjustments to reconcile net income to cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] All Trading Arrangements All Trading Arrangements [Member] Gain from sale of divested operation Gain from sale of divested operation Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal All Adjustments to Compensation All Adjustments to Compensation [Member] Derivative [Line Items] Derivative [Line Items] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Award Timing Disclosures [Line Items] Cash and cash equivalents and restricted cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Compensation Amount Outstanding Recovery Compensation Amount Additional paid-in capital Additional Paid in Capital Deferred taxes Deferred Income Tax Expense (Benefit) Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Four Finite-Lived Intangible Asset, Expected Amortization, after Year Four Foreign currency translation impact Finite-Lived Intangible Assets, Foreign Currency Translation Gain (Loss) Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Three Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Consulting Consulting Consulting [Member] -- None. No documentation exists for this element. -- Corporate and Reconciling Items Corporate And Reconciling Items [Member] Corporate And Reconciling Items [Member] Insider Trading Arrangements [Line Items] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Debt Instrument, Redemption, Period One Debt Instrument, Redemption, Period One [Member] Entity Registrant Name Entity Registrant Name Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] Dilutive effect of outstanding awards associated with stock-based compensation plans (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Other assets Increase (Decrease) in Other Operating Assets 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Two Adjustment to Compensation, Amount Adjustment to Compensation Amount Net income per share: Net Income Per Share, Basic And Diluted [Abstract] Net Income Per Share, Basic And Diluted Cost of services and product development Cost of Sales [Member] Document Period End Date Document Period End Date Proceeds from revolving credit facility Proceeds from Lines of Credit Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Adoption Date Trading Arrangement Adoption Date Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Disposal Group Name [Axis] Disposal Group Name [Axis] Schedule of Assets and Liabilities Measured to Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Payments on long-term debt Repayments of Long-Term Debt Treasury Stock Treasury Stock, Common [Member] Entity Central Index Key Entity Central Index Key Liabilities: Liabilities, Fair Value Disclosure [Abstract] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Derivative reclassifications Total (income) expense, net Derivative, Gain (Loss) on Derivative, Net Stock-based compensation expense Share-Based Payment Arrangement, Expense Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Gross cost, beginning balance Gross cost, ending balance Finite-Lived Intangible Assets, Gross Provision for income taxes Less: Provision for income taxes Income Tax Expense (Benefit) Designated as Hedging Instrument Designated as Hedging Instrument [Member] Fair Value Disclosures Fair Value Disclosures [Text Block] Payments of deferred financing fees Payments of Financing Costs Name Trading Arrangement, Individual Name Other comprehensive income (loss), net of tax Other comprehensive income (loss), net Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Treasury stock, average price paid per share (in dollars per share) Treasury Stock Average Price Paid Per Share Treasury Stock Average Price Paid Per Share. Total revenues Revenue from Contract with Customer, Excluding Assessed Tax Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Federal Reserve Board of New York Rate Federal Reserve Board of New York Rate [Member] Federal Reserve Board of New York Rate Common stock equivalents Common Stock Equivalents [Member] -- None. No documentation exists for this element. -- Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Assets: Assets, Fair Value Disclosure [Abstract] Credit Facility [Domain] Credit Facility [Domain] Number of shares repurchased (in shares) Treasury Stock, Shares, Acquired Additional interest above base rate Debt Instrument, Basis Spread on Variable Rate Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Long-term debt, net of deferred financing fees Long-Term Debt, Excluding Current Maturities Other long-lived assets Leasehold Improvements Leasehold Improvements [Member] Deferred compensation plan liabilities Plan Liabilities [Member] -- None. No documentation exists for this element. -- Number of contracts Number of Contracts Derivative, Number of Instruments Held Diluted (in shares) Shares used in the calculation of diluted income per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Schedule for Contract with Customer, Asset and Liability Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Numerator: Numerator: [Abstract] -- None. No documentation exists for this element. -- Revenue and Related Matters Revenue from Contract with Customer [Text Block] Company Selected Measure Amount Company Selected Measure Amount Additional Paid-In Capital Additional Paid-in Capital [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Total Assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Share Repurchase Program [Axis] Share Repurchase Program [Axis] Cover page. Cover [Abstract] United States and Canada United States And Canada [Member] -- None. No documentation exists for this element. -- Loss on release of interest rate swap recognized in AOCI AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Amortization and write-off of deferred financing fees Amortization of Debt Issuance Costs Fair Value, Recurring Fair Value, Recurring [Member] Deferred commissions Increase (Decrease) in Deferred Charges Other liabilities Other Liabilities, Noncurrent Non-NEOs Non-NEOs [Member] Remaining performance obligation, amount Revenue, Remaining Performance Obligation, Amount Other (income) expense, net Other Nonoperating Income (Expense) [Member] Weighted average effective rate Long-Term Debt, Weighted Average Interest Rate, over Time Segment Information Segment Reporting Disclosure [Text Block] Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Non-PEO NEO Non-PEO NEO [Member] Renewal term Lessee, Operating Lease, Renewal Term Equity Component [Domain] Equity Component [Domain] Adjustment to Compensation: Adjustment to Compensation [Axis] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Debt Instrument [Line Items] Debt Instrument [Line Items] Basic (in shares) Weighted average number of common shares used in the calculation of basic income per share (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Retirement Eligible Employees Equity Award Retirement Eligible Employees Equity Award [Member] -- None. No documentation exists for this element. -- Operating income Operating income Total segment gross contribution Operating Income (Loss) Acquisition and integration charges Business Combination, Acquisition and Integration Related Costs Business Combination, Acquisition and Integration Related Costs Revenues: Revenues [Abstract] Percentage of principal amount redeemed Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Proceeds from employee stock purchase plan Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Segments [Axis] Segments [Axis] Statement [Line Items] Statement [Line Items] Reduction in the carrying amount of operating lease right-of-use assets Operating Lease, Right-Of-Use Asset, Reduction In Carrying Amount Operating Lease, Right-Of-Use Asset, Reduction In Carrying Amount Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Schedule of Debt Schedule of Debt [Table Text Block] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Long-term line of credit Long-Term Line of Credit Customer Relationships Customer Relationships [Member]