Gartner (IT) 10-Q 30 Apr 24 2024 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2024	Apr. 26, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	1-14443
Entity Registrant Name	Gartner, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	04-3099750
Entity Address, Address Line One	P.O. Box 10212
Entity Address, Address Line Two	56 Top Gallant Road
Entity Address, City or Town	Stamford,
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06902-7700
City Area Code	203
Local Phone Number	964-0096
Title of 12(b) Security	Common Stock, $.0005 par value per share
Trading Symbol	IT
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		77,630,468
Entity Central Index Key	0000749251
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false
Current Fiscal Year End Date	--12-31

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 1,235,801	$ 1,318,999
Fees receivable, net of allowances of $9,000 for both periods	1,565,960	1,601,228
Deferred commissions	350,725	380,479
Prepaid expenses and other current assets	173,785	127,180
Total current assets	3,326,271	3,427,886
Property, equipment and leasehold improvements, net	256,536	262,718
Operating lease right-of-use assets	352,400	366,809
Goodwill	2,934,398	2,937,260
Intangible assets, net	477,701	501,958
Other assets	362,504	339,288
Total Assets	7,709,810	7,835,919
Current liabilities:
Accounts payable and accrued liabilities	844,274	1,127,604
Deferred revenues	2,796,016	2,640,515
Current portion of long-term debt	0	9,600
Total current liabilities	3,640,290	3,777,719
Long-term debt, net of deferred financing fees	2,456,877	2,448,696
Operating lease liabilities	491,182	513,406
Other liabilities	403,287	415,464
Total Liabilities	6,991,636	7,155,285
Stockholders’ Equity
Preferred stock, $0.01 par value, 5,000,000 shares authorized; none issued or outstanding	0	0
Common stock, $0.0005 par value, 250,000,000 shares authorized; 163,602,067 shares issued for both periods	82	82
Additional paid-in capital	2,373,501	2,320,289
Accumulated other comprehensive loss, net	(82,386)	(76,331)
Accumulated earnings	4,949,837	4,739,292
Treasury stock, at cost, 85,390,263 and 85,264,526 common shares, respectively	(6,522,860)	(6,302,698)
Total Stockholders’ Equity	718,174	680,634
Total Liabilities and Stockholders’ Equity	$ 7,709,810	$ 7,835,919

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Fees receivable, allowance	$ 9,000	$ 9,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0005	$ 0.0005
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	163,602,067	163,602,067
Treasury stock, common shares (in shares)	85,390,263	85,264,526

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues:
Total revenues	$ 1,472,926	$ 1,408,869
Costs and expenses:
Cost of services and product development	459,441	435,139
Selling, general and administrative	689,833	657,090
Depreciation	26,317	23,896
Amortization of intangibles	22,990	22,735
Acquisition and integration charges	460	1,368
Gain from sale of divested operation	0	(139,316)
Total costs and expenses	1,199,041	1,000,912
Operating income	273,885	407,957
Interest expense, net	(19,219)	(27,391)
Gain on event cancellation insurance claims	0	3,077
Other income (expense), net	4,891	(2,366)
Income before income taxes	259,557	381,277
Provision for income taxes	49,012	85,494
Net income	$ 210,545	$ 295,783
Net income per share:
Basic (in dollars per share)	$ 2.69	$ 3.72
Diluted (in dollars per share)	$ 2.67	$ 3.68
Weighted average shares outstanding:
Basic (in shares)	78,339	79,452
Diluted (in shares)	78,964	80,282
Research
Revenues:
Total revenues	$ 1,268,172	$ 1,217,191
Conferences
Revenues:
Total revenues	70,069	64,642
Consulting
Revenues:
Total revenues	$ 134,685	$ 127,036

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 210,545	$ 295,783
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(9,707)	1,832
Interest rate swaps – net change in deferred gain or loss	3,601	3,834
Pension plans – net change in deferred actuarial loss	51	34
Other comprehensive income (loss), net of tax	(6,055)	5,700
Comprehensive income	$ 204,490	$ 301,483

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Changes in Stockholders’ Equity (Deficit) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss, Net	Accumulated Earnings	Treasury Stock
Beginning balance at Dec. 31, 2022	$ 227,798	$ 82	$ 2,179,604	$ (101,610)	$ 3,856,826	$ (5,707,104)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	295,783				295,783
Other comprehensive income (loss), net	5,700			5,700
Issuances under stock plans	7,379		(2,141)			9,520
Common share repurchases	(108,850)					(108,850)
Stock-based compensation expense	45,048		45,048
Ending balance at Mar. 31, 2023	472,858	82	2,222,511	(95,910)	4,152,609	(5,806,434)
Beginning balance at Dec. 31, 2023	680,634	82	2,320,289	(76,331)	4,739,292	(6,302,698)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	210,545				210,545
Other comprehensive income (loss), net	(6,055)			(6,055)
Issuances under stock plans	8,072		2,712			5,360
Common share repurchases	(225,522)					(225,522)
Stock-based compensation expense	50,500		50,500
Ending balance at Mar. 31, 2024	$ 718,174	$ 82	$ 2,373,501	$ (82,386)	$ 4,949,837	$ (6,522,860)

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities:
Net income	$ 210,545	$ 295,783
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	49,307	46,631
Stock-based compensation expense	50,500	45,048
Deferred taxes	(17,823)	(7,866)
Gain from sale of divested operation	0	(139,316)
Loss on impairment of lease related assets	527	8,720
Reduction in the carrying amount of operating lease right-of-use assets	16,028	17,644
Amortization and write-off of deferred financing fees	1,537	1,161
(Gain) loss on de-designated swaps	(4,462)	1,393
Changes in assets and liabilities, net of acquisitions and divestitures:
Fees receivable, net	18,228	36,177
Deferred commissions	26,413	19,635
Prepaid expenses and other current assets	(47,509)	(18,370)
Other assets	(24,309)	(14,799)
Deferred revenues	173,542	155,153
Accounts payable and accrued and other liabilities	(263,688)	(282,315)
Cash provided by operating activities	188,836	164,679
Investing activities:
Additions to property, equipment and leasehold improvements	(22,660)	(21,122)
Acquisition of business	(2,000)	0
Proceeds from sale of divested operation	0	158,733
Cash (used in) provided by investing activities	(24,660)	137,611
Financing activities:
Proceeds from employee stock purchase plan	8,047	7,358
Payments of deferred financing fees	(2,604)	0
Proceeds from revolving credit facility	274,400	0
Payments on long-term debt	(274,400)	(1,800)
Purchases of treasury stock	(225,124)	(106,850)
Cash used in financing activities	(219,681)	(101,292)
Net (decrease) increase in cash and cash equivalents and restricted cash	(55,505)	200,998
Effects of exchange rates on cash and cash equivalents	(27,693)	(5,485)
Cash and cash equivalents and restricted cash, beginning of period	1,319,599	698,599
Cash and cash equivalents and restricted cash, end of period	$ 1,236,401	$ 894,112

Business and Basis of Presentat

Business and Basis of Presentation	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business and Basis of Presentation	Business and Basis of Presentation Business. Gartner, Inc. (NYSE: IT) delivers actionable, objective insight that drives smarter decisions and stronger performance on an organization’s mission-critical priorities. Segments . Gartner delivers its products and services globally through three business segments: Research, Conferences and Consulting. Revenues and other financial information for the Company’s segments are discussed in Note 7 — Segment Information. Basis of presentation . The accompanying interim Condensed Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”), as defined in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 270 for interim financial information and with the applicable instructions of U.S. Securities and Exchange Commission (“SEC”) Rule 10-01 of Regulation S-X on Form 10-Q, and should be read in conjunction with the consolidated financial statements and related notes of the Company in its Annual Report on Form 10-K for the year ended December 31, 2023. The fiscal year of Gartner is the twelve-month period from January 1 through December 31. In the opinion of management, all normal recurring accruals and adjustments considered necessary for a fair presentation of financial position, results of operations and cash flows at the dates and for the periods presented herein have been included. The results of operations for the three months ended March 31, 2024 may not be indicative of the results of operations for the remainder of 2024 or beyond. When used in these notes, the terms “Gartner,” the “Company,” “we,” “us,” or “our” refer to Gartner, Inc. and its consolidated subsidiaries. Principles of consolidation . The accompanying interim Condensed Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated. Use of estimates . The preparation of the accompanying interim Condensed Consolidated Financial Statements requires management to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities, and reported amounts of revenues and expenses. Such estimates include the valuation of fees receivable, goodwill, intangible assets and other long-lived assets, as well as tax accruals and other liabilities. In addition, estimates are used in revenue recognition, income tax expense or benefit, performance-based compensation charges, depreciation and amortization. Management believes its use of estimates in these interim Condensed Consolidated Financial Statements to be reasonable. Management continually evaluates and revises its estimates using historical experience and other factors, including the general economic environment and actions it may take in the future. Management adjusts these estimates when facts and circumstances dictate. However, these estimates may involve significant uncertainties and judgments and cannot be determined with precision. In addition, these estimates are based on management’s best judgment at a point in time. As a result, differences between estimates and actual results could be material and would be reflected in the Company’s consolidated financial statements in future periods. Cash and cash equivalents and restricted cash. Below is a table presenting the beginning-of-period and end-of-period cash amounts from the Company’s Condensed Consolidated Balance Sheets and the total cash amounts presented in the Condensed Consolidated Statements of Cash Flows (in thousands). March 31, December 31, 2024 2023 Cash and cash equivalents $ 1,235,801 $ 1,318,999 Restricted cash classified in (1): Prepaid expenses and other current assets 600 600 Cash and cash equivalents and restricted cash $ 1,236,401 $ 1,319,599 (1) Restricted cash consisted of an escrow account established in connection with one of the Company’s business acquisitions. Generally, such cash is restricted to use due to provisions contained in the underlying acquisition agreement. The Company will disburse the restricted cash to the sellers of the business upon satisfaction of any contingencies described in such agreements (e.g., potential indemnification claims, etc.). Revenue recognition. Revenue is recognized in accordance with the requirements of FASB ASC Topic 606, Revenue from Contracts with Customers (“ASC Topic 606”). Revenue is only recognized when all of the required criteria for revenue recognition have been met. The accompanying Condensed Consolidated Statements of Operations present revenue net of any sales or value-added taxes that we collect from customers and remit to government authorities. ASC Topic 270 requires certain disclosures in interim financial statements around the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Note 4 — Revenue and Related Matters provides additional information regarding the Company’s revenues. Gain on event cancellation insurance claims. In February 2023, the Company received $3.1 million of proceeds related to 2020 event cancellation insurance claims. The Company does not record any gain on insurance claims in excess of expenses incurred until the receipt of the insurance proceeds is deemed to be realizable. Accounting standards issued but not yet adopted. The FASB has issued an accounting standard that has not yet become effective as of March 31, 2024 and may impact the Company’s Consolidated Financial Statements or related disclosures in future periods. The standard and its potential impact are discussed below. Income Taxes — In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures (“ASU No. 2023-09”). The amendments in this ASU are expected to enhance the transparency and decision usefulness of income tax disclosures. ASU 2023-09 requires entities to enhance income tax disclosures primarily related to the rate reconciliation and income taxes paid information. Companies will need to disaggregate the disclosure of income taxes paid (net of refunds received) by federal, state, and foreign taxes on an annual basis. Additionally, on an annual basis, companies would disclose income taxes paid disaggregated by individual jurisdiction using a quantitative threshold of 5% of total income taxes paid. Public business entities would also be required to provide, on an annual basis, rate reconciliation information by specific categories, including state and local income tax, the effect of cross-border tax laws, foreign tax effects, changes in prior year unrecognized tax benefits, and tax credits, among others. Additionally, some categories would then require disaggregation based on a quantitative threshold of 5%. The foreign tax effect category requires disaggregation by both jurisdiction and nature. The ASU also requires additional qualitative disclosures. All public entities will be required to report income tax information in accordance with the new guidance starting in annual periods beginning after December 15, 2024. The Company expects this ASU to only impact its disclosures with no impacts to the Company’s results of operations, cash flows, and financial condition. Segment Reporting — In November 2023, the FASB issued ASU 2023-07, Segment Reporting: Improvements in Reportable Segment Disclosures (“ASU No. 2023-07”). The amendments in the ASU are expected to improve disclosures about a public entity’s reportable segments and addresses requests from investors and other allocators or capital for additional, more detailed information about a reportable segment’s expenses. ASU 2023-07 requires public companies to disclose, on an annual and interim basis, significant expenses that are regularly provided to the chief operating decision maker (CODM) and included within each reported measure of segment profit and loss. The amendments in the ASU require that a public company provide all annual disclosures about a reportable segment’s profit or loss and assets currently required under ASC 280 in interim periods. The amendments in the ASU also require that a public entity disclose, on an annual and interim basis, an amount for other segment items by reportable segment and a description of its composition. The other segment items category is the difference between segment revenue less the significant expenses disclosed and each reported measure of segment profit or loss. The amendments in the ASU, among other items, also requires that a public company disclose the title and position of the CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources. The ASU applies to all public entities that are required to report segment information in accordance with Topic 280. All public entities will be required to report segment information in accordance with the new guidance starting in annual periods beginning after December 15, 2023 and for interim periods within annual periods beginning after December 15, 2024. The Company expects this ASU to only impact its disclosures with no impacts to the Company’s results of operations, cash flows, and financial condition.

Acquisitions and Divestiture

Acquisitions and Divestiture	3 Months Ended
	Mar. 31, 2024
Business Combination and Asset Acquisition [Abstract]
Acquisition and Divestiture	Acquisition and Divestiture Acquisition In September 2023, the Company acquired 100% of a formerly independent sales agent of Gartner research products in the Czech Republic for an aggregate purchase price of $7.9 million, including cash acquired and deferred consideration. During the three months ended March 31, 2024, the Company paid $2.0 million of deferred consideration. The allocation of the purchase price is preliminary with respect to certain tax matters. Divestiture

Goodwill and Intangible Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill Goodwill represents the excess of the purchase price of acquired businesses over the estimated fair values of the tangible and identifiable intangible net assets acquired. Evaluations of the recoverability of goodwill are performed in accordance with FASB ASC Topic 350, which requires an annual assessment of potential goodwill impairment at the reporting unit level and whenever events or changes in circumstances indicate that the carrying value of goodwill may not be recoverable. When performing the annual assessment of the recoverability of goodwill, the Company initially performs a qualitative analysis evaluating whether any events or circumstances occurred or exist that provide evidence that it is more likely than not that the fair value of any of the Company’s reporting units is less than the related carrying amount. If the Company does not believe that it is more likely than not that the fair value of any of the Company’s reporting units is less than the related carrying amount, then no quantitative impairment test is performed. However, if the results of the qualitative assessment indicate that it is more likely than not that the fair value of a reporting unit is less than its respective carrying amount, then a quantitative impairment test is performed. Evaluating the recoverability of goodwill requires judgments and assumptions regarding future trends and events. As a result, both the precision and reliability of the estimates are subject to uncertainty. The Company’s most recent annual impairment test of goodwill was a qualitative analysis conducted during the quarter ended September 30, 2023 that indicated no impairment. Subsequent to completing the 2023 annual impairment test, there were no events or changes in circumstances noted that required an interim impairment test. The table below presents changes to the carrying amount of goodwill by segment during the three months ended March 31, 2024 (in thousands). Research Conferences Consulting Total Balance at December 31, 2023 (1) $ 2,657,549 $ 183,997 $ 95,714 $ 2,937,260 Foreign currency translation impact (2,634) (34) (194) (2,862) Balance at March 31, 2024 (1) $ 2,654,915 $ 183,963 $ 95,520 $ 2,934,398 (1) The Company does not have any accumulated goodwill impairment losses. Finite-Lived Intangible Assets The tables below present reconciliations of the carrying amounts of the Company’s finite-lived intangible assets as of the dates indicated (in thousands). March 31, 2024 Customer Technology-related Other Total Gross cost at December 31, 2023 $ 1,077,183 $ 11,200 $ 10,200 $ 1,098,583 Foreign currency translation impact (2,699) — — (2,699) Gross cost 1,074,484 11,200 10,200 1,095,884 Accumulated amortization (1) (601,317) (10,267) (6,599) (618,183) Balance at March 31, 2024 $ 473,167 $ 933 $ 3,601 $ 477,701 December 31, 2023 Customer Technology-related Other Total Gross cost $ 1,077,183 11,200 $ 10,200 $ 1,098,583 Accumulated amortization (1) (580,937) (9,333) (6,355) (596,625) Balance at December 31, 2023 $ 496,246 $ 1,867 $ 3,845 $ 501,958 (1) Finite-lived intangible assets are amortized using the straight-line method over the following periods: Customer relationships—6 to 13 years; Technology-related—3 years; and Other—11 years. Amortization expense related to finite-lived intangible assets was $23.0 million and $22.7 million during the three months ended March 31, 2024 and 2023, respectively. The estimated future amortization expense by year for finite-lived intangible assets is presented in the table below (in thousands). 2024 (remaining nine months) $ 66,973 2025 81,263 2026 78,589 2027 77,980 2028 76,509 Thereafter 96,387 $ 477,701

Revenue and Related Matters

Revenue and Related Matters	3 Months Ended
	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Revenue and Related Matters	Revenue and Related Matters Disaggregated Revenue — The Company’s disaggregated revenue by reportable segment is presented in the tables below for the periods indicated (in thousands). By Primary Geographic Market (1) Three Months Ended March 31, 2024 Primary Geographic Market Research Conferences Consulting Total United States and Canada $ 835,221 $ 48,090 $ 78,539 $ 961,850 Europe, Middle East and Africa 287,543 10,328 36,602 334,473 Other International 145,408 11,651 19,544 176,603 Total revenues $ 1,268,172 $ 70,069 $ 134,685 $ 1,472,926 Three Months Ended March 31, 2023 Primary Geographic Market Research Conferences Consulting Total United States and Canada $ 809,399 $ 48,775 $ 76,975 $ 935,149 Europe, Middle East and Africa 268,657 9,207 32,938 310,802 Other International 139,135 6,660 17,123 162,918 Total revenues $ 1,217,191 $ 64,642 $ 127,036 $ 1,408,869 (1) Revenue is reported based on where the sale is fulfilled. The Company’s revenue is generated primarily through direct sales to clients by domestic and international sales forces and a network of independent international sales agents. By Timing of Revenue Recognition Three Months Ended March 31, 2024 Timing of Revenue Recognition Research Conferences Consulting Total Transferred over time (1) $ 1,182,268 $ — $ 108,587 $ 1,290,855 Transferred at a point in time (2) 85,904 70,069 26,098 182,071 Total revenues $ 1,268,172 $ 70,069 $ 134,685 $ 1,472,926 Three Months Ended March 31, 2023 Timing of Revenue Recognition Research Conferences Consulting Total Transferred over time (1) $ 1,109,796 $ — $ 97,006 $ 1,206,802 Transferred at a point in time (2) 107,395 64,642 30,030 202,067 Total revenues $ 1,217,191 $ 64,642 $ 127,036 $ 1,408,869 (1) Research revenues in this category are recognized in connection with performance obligations that are satisfied over time using a time-elapsed output method to measure progress. Consulting revenues in this category are recognized over time using costs incurred to date relative to total estimated costs at completion. (2) The revenues in this category are recognized in connection with performance obligations that are satisfied at the point in time that the contractual deliverables are provided to the customer. Performance Obligations — For customer contracts that are greater than one year in duration, the aggregate amount of the transaction price allocated to performance obligations that were unsatisfied (or partially unsatisfied) as of March 31, 2024 was approximately $5.6 billion. The Company expects to recognize $2.6 billion, $2.2 billion and $0.8 billion of this revenue (most of which pertains to Research) during the remainder of 2024, the year ending December 31, 2025 and thereafter, respectively. The Company applies a practical expedient that is permitted under ASC Topic 606 and, accordingly, it does not disclose such performance obligation information for customer contracts that have original durations of one year or less. The Company’s performance obligations for contracts meeting this ASC Topic 606 disclosure exclusion primarily include: (i) stand-ready services under Research subscription contracts; (ii) holding conferences and meetings where attendees and exhibitors can participate; and (iii) providing customized Consulting solutions for clients under fixed fee and time and materials engagements. The remaining duration of these performance obligations is generally less than one year, which aligns with the period that the parties have enforceable rights and obligations under the affected contracts. Customer Contract Assets and Liabilities — The timing of the recognition of revenue and the amount and timing of the Company’s billings and cash collections, including upfront customer payments, result in the recognition of both assets and liabilities on the Company’s Condensed Consolidated Balance Sheets. The table below provides information regarding certain of the Company’s balance sheet accounts that pertain to its contracts with customers (in thousands). March 31, December 31, 2024 2023 Assets: Fees receivable, gross (1) $ 1,574,960 $ 1,610,228 Contract assets recorded in Prepaid expenses and other current assets (2) $ 29,773 $ 28,791 Contract liabilities: Deferred revenues (current liability) (3) $ 2,796,016 $ 2,640,515 Non-current deferred revenues recorded in Other liabilities (3) 24,523 33,490 Total contract liabilities $ 2,820,539 $ 2,674,005 (1) Fees receivable represent an unconditional right to payment from the Company’s customers and include both billed and unbilled amounts. (2) Contract assets represent recognized revenue for which the Company does not have an unconditional right to payment as of the balance sheet date because the project may be subject to a progress billing milestone or some other billing restrictions. (3) Deferred revenues represent amounts (i) for which the Company has received an upfront customer payment or (ii) that pertain to recognized fees receivable. Both situations occur before the completion of the Company’s performance obligation(s). The Company recognized revenue of $1.0 billion and $0.9 billion during the three months ended March 31, 2024 and 2023, respectively, that was attributable to deferred revenues that were recorded at the beginning of each such period. Those amounts primarily consisted of Research revenues that were recognized ratably as control of the goods or services passed to the customer during the reporting periods. During each of the three

Computation of Earnings Per Sha

Computation of Earnings Per Share	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Computation of Earnings Per Share	Computation of Earnings Per Share Basic earnings per share (“EPS”) is computed by dividing net income by the weighted average number of shares of Common Stock outstanding during the period. Diluted EPS reflects the potential dilution of securities that could share in earnings. Potential shares of common stock are excluded from the computation of diluted earnings per share when their effect would be anti-dilutive. The table below sets forth the calculation of basic and diluted income per share for the periods indicated (in thousands, except per share data). Three Months Ended March 31, 2024 2023 Numerator: Net income used for calculating basic and diluted income per share $ 210,545 $ 295,783 Denominator: Weighted average common shares used in the calculation of basic income per share 78,339 79,452 Dilutive effect of outstanding awards associated with stock-based compensation plans (1) 625 830 Shares used in the calculation of diluted income per share 78,964 80,282 Basic income per share $ 2.69 $ 3.72 Diluted income per share $ 2.67 $ 3.68 (1) Certain outstanding awards associated with stock-based compensation plans were not included in the computation of diluted income per share because the effect would have been anti-dilutive. These anti-dilutive outstanding awards

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Company grants stock-based compensation awards as an incentive for employees and directors to contribute to the Company’s long-term success. The Company currently awards stock-settled stock appreciation rights, service-based and performance-based restricted stock units, and common stock equivalents. As of March 31, 2024, the Company had 5.6 million shares of its common stock, par value $0.0005 per share, (the “Common Stock”) available for stock-based compensation awards under the Gartner, Inc. Long-Term Incentive Plan as amended and restated in June 2023 (the “Plan”). The tables below summarize the Company’s stock-based compensation expense by award type and expense category line item during the periods indicated (in millions). Three Months Ended March 31, Award type 2024 2023 Stock appreciation rights $ 4.6 $ 2.5 Restricted stock units 45.6 42.2 Common stock equivalents 0.3 0.3 Total (1) $ 50.5 $ 45.0 Three Months Ended March 31, Expense category line item 2024 2023 Cost of services and product development $ 19.5 $ 18.3 Selling, general and administrative 31.0 26.7 Total (1) $ 50.5 $ 45.0 (1) Includes costs of $30.6 million and $26.8 million during the three months ended March 31, 2024 and 2023, respectively, for awards to retirement-eligible employees. Those awards vest on an accelerated basis.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2024
Segment Reporting [Abstract]
Segment Information	Segment Information The Company’s products and services are delivered through three segments – Research, Conferences and Consulting, as described below. • Research equips executives and their teams from every function and across all industries with actionable, objective insight, guidance and tools. Our experienced experts deliver all this value informed by an unmatched combination of practitioner-sourced and data-driven research to help our clients address their mission critical priorities. • Conferences provides executives and teams across an organization the opportunity to learn, share and network. From our Gartner Symposium/Xpo series, to industry-leading conferences focused on specific business roles and topics, to peer-driven sessions, our offerings enable attendees to experience the best of Gartner insight and guidance. • Consulting serves senior executives leading technology-driven strategic initiatives leveraging the power of Gartner’s actionable, objective insight. Through custom analysis and on-the-ground support we enable optimized technology investments and stronger performance on our clients’ mission critical priorities. The Company evaluates segment performance and allocates resources based on gross contribution margin. Gross contribution, as presented in the tables below, is defined as operating income or loss excluding certain Cost of services and product development expenses, Selling, general and administrative expenses, Depreciation, Amortization of intangibles, Acquisition and integration charges and Gain from sale of divested operation. Certain bonus and fringe benefit costs included in consolidated Cost of services and product development are not allocated to segment expense. The accounting policies used by the reportable segments are the same as those used by the Company. There are no intersegment revenues. The Company does not identify or allocate assets, including capital expenditures, by reportable segment. Accordingly, assets are not reported by segment because the information is not available by segment and is not reviewed in the evaluation of segment performance or in making decisions regarding the allocation of resources. The tables below present information about the Company’s reportable segments for the periods indicated (in thousands). Three Months Ended March 31, 2024 Research Conferences Consulting Consolidated Revenues $ 1,268,172 $ 70,069 $ 134,685 $ 1,472,926 Gross contribution 944,570 23,255 54,287 1,022,112 Corporate and other expenses (748,227) Operating income $ 273,885 Three Months Ended March 31, 2023 Research Conferences Consulting Consolidated Revenues $ 1,217,191 $ 64,642 $ 127,036 $ 1,408,869 Gross contribution 899,514 26,788 50,808 977,110 Corporate and other expenses (569,153) Operating income $ 407,957 The table below provides a reconciliation of total segment gross contribution to net income for the periods indicated (in thousands). Three Months Ended March 31, 2024 2023 Total segment gross contribution $ 1,022,112 $ 977,110 Costs and expenses: Cost of services and product development - unallocated (1) 8,627 3,380 Selling, general and administrative 689,833 657,090 Depreciation and amortization 49,307 46,631 Acquisition and integration charges 460 1,368 Gain from sale of divested operation — (139,316) Operating income 273,885 407,957 Interest expense and other, net (14,328) (29,757) Gain on event cancellation insurance claims — 3,077 Less: Provision for income taxes 49,012 85,494 Net income $ 210,545 $ 295,783 (1) The unallocated amounts consist of certain bonus and fringe costs recorded in consolidated Cost of services and product development that are not allocated to segment expense. The Company’s policy is to allocate bonuses to segments at 100% of a segment employee’s target bonus. Amounts above or below 100% are absorbed by corporate.

Debt

Debt	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Debt	Debt The Company’s total outstanding borrowings are summarized in the table below (in thousands). March 31, December 31, Description 2024 2023 2024 Credit Agreement - Revolving facility (1), (2) $ 274,400 $ — 2020 Credit Agreement - Term loan facility — 274,400 2020 Credit Agreement - Revolving credit facility — — 4.50% Senior Notes due 2028 (“2028 Notes”) 800,000 800,000 3.625% Senior Notes due 2029 (“2029 Notes”) 600,000 600,000 3.75% Senior Notes due 2030 (“2030 Notes”) 800,000 800,000 Other (3) 5,000 5,000 Principal amount outstanding (4) 2,479,400 2,479,400 Less: deferred financing fees (5) (22,523) (21,104) Net balance sheet carrying amount $ 2,456,877 $ 2,458,296 (1) The contractual annualized interest rate as of March 31, 2024 on the 2024 Credit Agreement was 6.725%, which consisted of Term Secured Overnight Financing Rate (“SOFR”) of 5.375% plus a margin of 1.350%. However, the Company has an interest rate swap contract that effectively converts the floating SOFR on outstanding amounts to a fixed base rate. (2) The Company had approximately $0.7 billion of available borrowing capacity on the 2024 Credit Agreement revolver (not including the expansion feature) as of March 31, 2024. (3) Consists of a State of Connecticut economic development loan originated in 2019 with a 10-year maturity and bears interest at a fixed rate of 1.75%. This loan may be repaid at any time by the Company without penalty. (4) The weighted average annual effective rate on the Company’s outstanding debt for the three months ended March 31, 2024, including the effects of its interest rate swaps discussed below, was 5.01%. (5) Deferred financing fees are being amortized to Interest expense, net over the term of the related debt obligation. 2024 Credit Agreement On March 26, 2024, the Company entered into a Credit Agreement (the “2024 Credit Agreement”) among the Company, as borrower, the lenders party thereto and JPMorgan Chase Bank, N.A., as administrative agent (the “Administrative Agent”). The 2024 Credit Agreement provides for a $1.0 billion senior unsecured five-year revolving facility. The facility may be increased, at the Company’s option and under certain conditions, by up to an additional $750 million in the aggregate. The facility may be used for revolving loans, and up to $75.0 million may be used for letters of credit. The revolving loans may be borrowed, repaid and re-borrowed until March 26, 2029, at which time all amounts borrowed must be repaid, subject to customary extension mechanics. On March 26, 2024, the Company borrowed $274.4 million under the 2024 Credit Agreement. The initial borrowing was used to repay the outstanding amounts under the 2020 Credit Agreement. Additional amounts borrowed under the 2024 Credit Agreement will be used for working capital needs and general corporate purposes of the Company and its subsidiaries, including the funding of acquisitions and investments, payment of capital expenditures and the repurchase of shares. Interest under the revolving facility accrues, at a variable rate, based on, at our option, (i) the Secured Overnight Funding Rate (“SOFR”) plus a credit spread adjustment of 0.10% or (ii) an alternate base rate (“Base Rate”) plus, in each case, an applicable margin, and is payable monthly. The applicable margin ranges between 1.125% and 1.75%, depending on the lower rate determined by either the Company’s leverage ratio or the credit rating of the Company’s senior unsecured debt. At March 31, 2024, the applicable all-in margin on the revolving facility was 1.35% (including the credit spread adjustment). The commitment fee payable on the unused portion of the facility is equal to between 0.125% and 0.25% based on utilization of the facility. The Company has also agreed to pay customary letter of credit fees. The 2024 Credit Agreement contains certain customary restrictive loan covenants, including, among others, a financial covenant requiring a maximum leverage ratio and covenants limiting the Company’s ability to grant liens, make acquisitions, be acquired and the ability of the Company’s subsidiaries to incur indebtedness. Subsidiaries of the Company are not required to guarantee obligations under the facility, unless such subsidiaries guarantee indebtedness in excess of a threshold set out in the 2024 Credit Agreement, subject to certain limitations and exceptions. The 2024 Credit Agreement contains customary events of default that include, among others, non-payment of principal, interest or fees, material inaccuracy of representations and warranties, violation of covenants, cross defaults to certain other indebtedness, bankruptcy and insolvency events, ERISA defaults, material judgments, and events constituting a change of control. The occurrence of an event of default allows the lenders to terminate their obligations to lend under the 2024 Credit Agreement and could result in the acceleration of the Company’s obligations under the facility. 2029 Notes On June 18, 2021, the Company issued $600.0 million aggregate principal amount of 3.625% Senior Notes due 2029. The 2029 Notes were issued pursuant to an indenture, dated as of June 18, 2021 (the “2029 Note Indenture”), among the Company, the guarantors party thereto and U.S. Bank National Association, as trustee. The 2029 Notes were issued at an issue price of 100.0% and bear interest at a rate of 3.625% per annum. Interest on the 2029 Notes is payable on June 15 and December 15 of each year, beginning on December 15, 2021. The 2029 Notes will mature on June 15, 2029. The Company may redeem some or all of the 2029 Notes at any time on or after June 15, 2024 for cash at the redemption prices set forth in the 2029 Notes Indenture, plus accrued and unpaid interest to, but excluding, the redemption date. Prior to June 15, 2024, the Company may redeem up to 40% of the aggregate principal amount of the 2029 Notes in connection with certain equity offerings, or some or all of the 2029 Notes with a “make-whole” premium, in each case subject to the terms set forth in the 2029 Note Indenture. On March 26, 2024, in connection with the closing of the Credit Agreement and as a result of the termination of the 2020 Credit Agreement, the Company’s subsidiaries that guaranteed the Company’s 2029 Notes were released from their guarantee obligations with respect to the Notes, in accordance with the terms of the indenture pursuant to which the 2029 Notes was issued. 2030 Notes On September 28, 2020, the Company issued $800.0 million aggregate principal amount of 3.75% Senior Notes due 2030. The 2030 Notes were issued pursuant to an indenture, dated as of September 28, 2020 (the “2030 Note Indenture”), among the Company, the guarantors party thereto and U.S. Bank National Association, as trustee. The 2030 Notes were issued at an issue price of 100.0% and bear interest at a rate of 3.75% per annum. Interest on the 2030 Notes is payable on April 1 and October 1 of each year, beginning on April 1, 2021. The 2030 Notes will mature on October 1, 2030. The Company may redeem some or all of the 2030 Notes at any time on or after October 1, 2025 for cash at the redemption prices set forth in the 2030 Note Indenture, plus accrued and unpaid interest to, but excluding, the redemption date. Prior to October 1, 2025, the Company may redeem up to 40% of the aggregate principal amount of the 2030 Notes in connection with certain equity offerings, or some or all of the 2030 Notes with a “make-whole” premium, in each case subject to the terms set forth in the 2030 Note Indenture. On March 26, 2024, in connection with the closing of the Credit Agreement and as a result of the termination of the 2020 Credit Agreement, the Company’s subsidiaries that guaranteed the Company’s 2030 Notes were released from their guarantee obligations with respect to the Notes, in accordance with the terms of the indenture pursuant to which the 2030 Notes was issued. 2028 Notes On June 22, 2020, the Company issued $800.0 million aggregate principal amount of 4.50% Senior Notes due 2028. The 2028 Notes were issued pursuant to an indenture, dated as of June 22, 2020 (the “2028 Note Indenture”), among the Company, the guarantors party thereto and U.S. Bank National Association, as trustee. The 2028 Notes were issued at an issue price of 100.0% and bear interest at a rate of 4.50% per annum. Interest on the 2028 Notes is payable on January 1 and July 1 of each year, beginning on January 1, 2021. The 2028 Notes will mature on July 1, 2028. The Company may redeem some or all of the 2028 Notes at any time on or after July 1, 2023 for cash at the redemption prices set forth in the 2028 Note Indenture, plus accrued and unpaid interest to, but excluding, the redemption date. Prior to July 1, 2023, the Company may redeem up to 40% of the aggregate principal amount of the 2028 Notes in connection with certain equity offerings, or some or all of the 2028 Notes with a “make-whole” premium, in each case subject to the terms set forth in the 2028 Note Indenture. On March 26, 2024, in connection with the closing of the Credit Agreement and as a result of the termination of the 2020 Credit Agreement, the Company’s subsidiaries that guaranteed the Company’s 2028 Notes were released from their guarantee obligations with respect to the Notes, in accordance with the terms of the indenture pursuant to which the 2028 Notes was issued. 2020 Credit Agreement Prior to entering into the 2024 Credit Agreement, the Company had a credit facility that provided for a $400.0 million Term loan facility and a $1.0 billion Revolving credit facility (the “2020 Credit Agreement”). The 2020 Credit Agreement contained certain customary restrictive loan covenants, including, among others, financial covenants that applied a maximum consolidated leverage ratio and a minimum consolidated interest expense coverage ratio. On March 26, 2024, concurrently with the Company’s entry into the 2024 Credit Agreement, the Company terminated the 2020 Credit Agreement and repaid all amounts outstanding. Interest Rate Swap As of March 31, 2024, the Company had one fixed-for-floating interest rate swap contract with a notional value of $350.0 million that matures in September 2025. Under the contract, the Company pays a base fixed rate of 2.98% and in return receives a floating Term SOFR base rate on 30-day notional borrowings. Effective June 30, 2020, the Company de-designated all of its interest rate swaps and discontinued hedge accounting. Accordingly, subsequent changes to the fair value of the interest rate swap are recorded in Other income (expense), net. The amounts previously recorded in Accumulated other comprehensive loss are amortized into Interest expense, net over the terms of the hedged forecasted interest payments. As of March 31, 2024, $27.5 million is remaining in Accumulated other comprehensive loss, net. See Note 11 — Derivatives and Hedging for the amounts remaining in Accumulated other comprehensive loss, net of tax effect, at March 31, 2024 and December 31, 2023. See Note 12 — Fair Value Disclosures for a discussion of the fair values of Company’s interest rate swaps.

Equity

Equity	3 Months Ended
	Mar. 31, 2024
Stockholders' Equity Note [Abstract]
Equity	Equity Share Repurchase Authorization In 2015, the Company’s Board of Directors (the “Board”) authorized a share repurchase program to repurchase up to $1.2 billion of the Company’s common stock. The Board authorized incremental share repurchases of up to an aggregate additional $3.5 billion of the Company’s common stock during 2021, 2022, and 2023. As of March 31, 2024, $831.3 million remained available under the share repurchase program. The Company may repurchase its common stock from time-to-time in amounts, at prices and in the manner that the Company deems appropriate, subject to the availability of stock, prevailing market conditions, the trading price of the stock, the Company’s financial performance and other conditions. Repurchases may be made through open market purchases (which may include repurchase plans designed to comply with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended), accelerated share repurchases, private transactions or other transactions and will be funded by cash on hand and borrowings. Repurchases may also be made from time-to-time in connection with the settlement of the Company’s stock-based compensation awards. The Company’s share repurchase activity is presented in the table below for the periods indicated. Three Months Ended March 31, 2024 2023 Number of shares repurchased (1) 489,734 327,680 Cash paid for repurchased shares (in thousands) (2) $ 225,124 $ 106,850 (1) The average purchase price for repurchased shares was $459.69 and $332.18 for the three months ended March 31, 2024 and 2023, respectively. The repurchased shares during the three months ended March 31, 2024 and 2023 included purchases for both open market purchases and stock-based compensation award settlements. (2) The cash paid for repurchased shares during the three months ended March 31, 2023 excluded $2.0 million of open market purchases with trade dates in March 2023 that settled in April 2023. Accumulated Other Comprehensive Loss, net (“AOCL”) The tables below provide information about the changes in AOCL by component and the related amounts reclassified out of AOCL to income during the periods indicated (net of tax, in thousands) (1). Three Months Ended March 31, 2024 Interest Rate Defined Foreign Total Balance – December 31, 2023 $ (24,162) $ (5,731) $ (46,438) $ (76,331) Other comprehensive income (loss) activity during the period: Change in AOCL before reclassifications to income — — (9,707) (9,707) Reclassifications from AOCL to income (2), (3) 3,601 51 — 3,652 Other comprehensive income (loss), net 3,601 51 (9,707) (6,055) Balance – March 31, 2024 $ (20,561) $ (5,680) $ (56,145) $ (82,386) Three Months Ended March 31, 2023 Interest Rate Defined Foreign Total Balance – December 31, 2022 $ (39,248) $ (4,247) $ (58,115) $ (101,610) Other comprehensive income (loss) activity during the period: Change in AOCL before reclassifications to income — — 1,832 1,832 Reclassifications from AOCL to income (2), (3) 3,834 34 — 3,868 Other comprehensive income (loss), net 3,834 34 1,832 5,700 Balance – March 31, 2023 $ (35,414) $ (4,213) $ (56,283) $ (95,910) (1) Amounts in parentheses represent debits (deferred losses). (2) $4.8 million and $5.1 million of the reclassifications related to interest rate swaps (cash flow hedges) were recorded in Interest expense, net, for the three months ended March 31, 2024 and 2023, respectively. See Note 8 — Debt and Note 11 — Derivatives and Hedging for information regarding the cash flow hedges. (3) The reclassifications related to defined benefit pension plans were recorded in Other income (expense), net.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The provision for income taxes was $49.0 million and $85.5 million for the three months ended March 31, 2024 and 2023, respectively. The effective income tax rate was 18.9% and 22.4% for the three months ended March 31, 2024 and 2023, respectively. The effective income tax rate was higher in the prior year primarily due to the impact of the sale of the TalentNeuron business. The Company had gross unrecognized tax benefits of $152.4 million on March 31, 2024 and $148.4 million on December 31, 2023. It is reasonably possible that gross unrecognized tax benefits will decrease by approximately $6.0 million within the next twelve months due to the anticipated closure of audits and the expiration of certain statutes of limitation. In January 2024, the Company completed an intercompany transfer of certain intellectual property. The tax impact of the transfer did not have a significant impact on our effective tax rate. Prior to the sale, the Company had a $103.1 million deferred tax asset for tax basis in the related IP and a full valuation allowance due to no expected local tax benefit of the asset. As a result of the IP transfer, the deferred tax asset and related valuation allowance were written off with no impact to tax expense. The Company’s intellectual property footprint continues to evolve and may result in tax rate volatility in the future. The Organization for Economic Co-operation and Development (“the OECD”) has issued various tax proposals including a two-pillar approach to global taxation (BEPS 2.0/ Pillar Two), focusing on global profit allocation and a 15% global corporate minimum tax rate. Several countries in which Gartner does business have proposed or enacted new laws to align with OECD Pillar Two proposals. The minimum tax is treated as a current cost beginning in 2024 and does not have a significant impact on the Company's effective tax rate for the current period. Significant details around the provisions are still uncertain as the OECD and participating countries continue to work on defining the underlying rules and administrative procedures. The Company will continue to monitor and reflect the impact of such legislative changes in future financial statements as appropriate.

Derivatives and Hedging

Derivatives and Hedging	3 Months Ended
	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging	Derivatives and Hedging The Company enters into a limited number of derivative contracts to mitigate the cash flow risk associated with changes in interest rates on variable-rate debt and changes in foreign exchange rates on forecasted foreign currency transactions. The Company accounts for its outstanding derivative contracts in accordance with FASB ASC Topic 815, which requires all derivatives, including derivatives designated as accounting hedges, to be recorded on the balance sheet at fair value. The tables below provide information regarding the Company’s outstanding derivative contracts as of the dates indicated (in thousands, except for number of contracts). March 31, 2024 Derivative Contract Type Number of Notional Fair Value Balance Unrealized Interest rate swap (1) 1 $ 350,000 $ 2,374 Other assets $ (20,561) 7,060 Other current assets Foreign currency forwards (2) 31 186,470 (180) Accrued liabilities — Total 32 $ 536,470 $ 9,254 $ (20,561) December 31, 2023 Derivative Contract Type Number of Contracts Notional Fair Value Balance Unrealized Interest rate swap (1) 1 $ 350,000 $ 1,097 Other assets $ (24,162) 5,962 Other current assets Foreign currency forwards (2) 111 525,719 180 Other current assets — Total 112 $ 875,719 $ 7,239 $ (24,162) (1) Effective June 30, 2020, the Company de-designated all of its interest rate swaps and discontinued hedge accounting. Accordingly, subsequent changes to fair value of the interest rate swap are recorded in Other income (expense), net. The amounts previously recorded in Accumulated other comprehensive loss are amortized into Interest expense, net over the terms of the hedged forecasted interest payments. See Note 8 — Debt for additional information regarding the Company’s interest rate swap contract. (2) The Company has foreign exchange transaction risk because it typically enters into transactions in the normal course of business that are denominated in foreign currencies that differ from the local functional currency. The Company enters into short-term foreign currency forward exchange contracts to mitigate the cash flow risk associated with changes in foreign currency rates on forecasted foreign currency transactions. These contracts are accounted for at fair value with realized and unrealized gains and losses recognized in Other income (expense), net because the Company does not designate these contracts as hedges for accounting purposes. All of the outstanding foreign currency forward exchange contracts at March 31, 2024 matured before April 30, 2024. (3) See Note 12 — Fair Value Disclosures for the determination of the fair values of these instruments. At March 31, 2024, all of the Company’s derivative counterparties were investment grade financial institutions. The Company did not have any collateral arrangements with its derivative counterparties and none of the derivative contracts contained credit-risk related contingent features. The table below provides information regarding amounts recognized in the accompanying Condensed Consolidated Statements of Operations for derivative contracts for the periods indicated (in thousands). Three Months Ended March 31, Amount recorded in: 2024 2023 Interest expense, net (1) $ 4,806 $ 5,117 Other (income) expense, net (4,314) 1,904 Total (income) expense, net $ 492 $ 7,021 (1) Consists of interest expense from interest rate swap contracts. (2)

Fair Value Disclosures

Fair Value Disclosures	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Fair Value Disclosures	Fair Value Disclosures The Company’s financial instruments include cash equivalents, fees receivable from customers, accounts payable and accrued liabilities, all of which are normally short-term in nature. The Company believes that the carrying amounts of these financial instruments reasonably approximate their fair values due to their short-term nature. The Company’s financial instruments also include its outstanding variable-rate borrowings under the 2024 Credit Agreement. The Company believes that the carrying amounts of its variable-rate borrowings reasonably approximate their fair values because the rates of interest on those borrowings reflect current market rates of interest for similar instruments with comparable maturities. The Company enters into a limited number of derivatives transactions but does not enter into repurchase agreements, securities lending transactions or master netting arrangements. Receivables or payables that result from derivatives transactions are recorded gross in the Company’s Condensed Consolidated Balance Sheets. FASB ASC Topic 820 provides a framework for the measurement of fair value and a valuation hierarchy based on the transparency of inputs used in the valuation of assets and liabilities. Classification within the valuation hierarchy is based on the lowest level of input that is significant to the resulting fair value measurement. The valuation hierarchy contains three levels. Level 1 measurements consist of quoted prices in active markets for identical assets or liabilities. Level 2 measurements include significant other observable inputs such as quoted prices for similar assets or liabilities in active markets; identical assets or liabilities in inactive markets; observable inputs such as interest rates and yield curves; and other market-corroborated inputs. Level 3 measurements include significant unobservable inputs such as internally-created valuation models. Generally, the Company does not utilize Level 3 valuation inputs to remeasure any of its assets or liabilities. However, Level 3 inputs may be used by the Company when certain long-lived assets, including identifiable intangible assets, goodwill, and right-of-use assets are measured at fair value on a nonrecurring basis when there are indicators of impairment. Additionally, Level 3 inputs may be used by the Company in its required annual impairment review of goodwill. Information regarding the periodic assessment of the Company’s goodwill is included in Note 3 — Goodwill and Intangible Assets. The Company does not typically transfer assets or liabilities between different levels of the valuation hierarchy. The table below presents the fair values of certain financial assets and liabilities that are measured at fair value on a recurring basis in the Company's financial statements (in thousands). Description March 31, December 31, Assets: Values based on Level 1 inputs: Deferred compensation plan assets (1) $ 20,421 $ 10,290 Total Level 1 inputs 20,421 10,290 Values based on Level 2 inputs: Deferred compensation plan assets (1) 112,690 104,555 Foreign currency forward contracts (2) 82 1,646 Interest rate swap contract (3) 9,434 7,059 Total Level 2 inputs 122,206 113,260 Total Assets $ 142,627 $ 123,550 Liabilities: Values based on Level 2 inputs: Deferred compensation plan liabilities (1) $ 136,246 $ 121,708 Foreign currency forward contracts (2) 262 1,466 Total Level 2 inputs 136,508 123,174 Total Liabilities $ 136,508 $ 123,174 (1) The Company has a deferred compensation plan for the benefit of certain highly compensated officers, managers and other key employees. The assets consist of investments in money market funds, mutual funds and company-owned life insurance contracts, which are valued based on Level 1 or Level 2 inputs. The related deferred compensation plan liabilities are recorded at fair value, or the estimated amount needed to settle the liability, which the Company considers to be a Level 2 input. (2) The Company enters into foreign currency forward exchange contracts to hedge the effects of adverse fluctuations in foreign currency exchange rates (see Note 11 — Derivatives and Hedging). Valuation of these contracts is based on observable foreign currency exchange rates in active markets, which the Company considers to be a Level 2 input. (3) The Company has an interest rate swap contract that hedges the risk of variability from interest payments on its borrowings (see Note 8 — Debt). The fair value of the interest rate swap is based on mark-to-market valuations prepared by a third-party broker. This valuation is based on observable interest rates from recently executed market transactions and other observable market data, which the Company considers to be Level 2 inputs. The Company independently corroborates the reasonableness of the valuations prepared by the third-party broker by using an electronic quotation service. The table below presents the carrying amounts (net of deferred financing costs) and fair values of financial instruments that are not recorded at fair value in the Company’s Condensed Consolidated Balance Sheets (in thousands). The estimated fair value of the financial instruments was derived from quoted market prices provided by an independent dealer, which the Company considers to be a Level 2 input. Carrying Amount Fair Value March 31, December 31, March 31, December 31, Description 2024 2023 2024 2023 2028 Notes $ 794,384 $ 794,088 $ 763,032 $ 759,040 2029 Notes 595,009 594,794 541,800 543,408 2030 Notes 793,411 793,189 715,496 709,600 Total $ 2,182,804 $ 2,182,071 $ 2,020,328 $ 2,012,048 Assets and liabilities measured at fair value on a non-recurring basis The Company’s certain long-lived assets, including identifiable intangible assets, goodwill, right-of-use assets and other long-lived assets, are measured at fair value on a nonrecurring basis when there are indicators of impairment. During the three months ended March 31, 2024, the Company recorded impairment charges of $0.4 million on right-of-use assets and $0.1 million on other long-lived assets primarily related to certain office leases that the Company determined will no longer be used. The impairments were derived by comparing the fair value of the impacted assets to the carrying value of those assets as of the impairment measurement date, as required under ASC Topic 360 using Level 3 inputs. See Note 14 — Leases for additional discussion related to these impairment charges.

Contingencies

Contingencies	3 Months Ended
	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies Legal Matters. The Company is involved in legal proceedings and litigation arising in the ordinary course of business. A provision is recorded for pending litigation in the Company’s consolidated financial statements when it is determined that an unfavorable outcome is probable and the amount of the loss can be reasonably estimated. The Company believes that the potential liability, if any, in excess of amounts already accrued from all proceedings, claims and litigation will not have a material effect on its financial position, cash flows or results of operations when resolved in a future period. Indemnifications. The Company has various agreements that may obligate it to indemnify the other party with respect to certain matters. Generally, these indemnification clauses are included in contracts arising in the normal course of business under which the Company customarily agrees to hold the other party harmless against losses arising from a breach of representations related to matters such as title to assets sold and licensed or certain intellectual property rights. It is not possible to predict the maximum potential amount of future payments under these indemnification agreements due to the conditional nature of the Company’s obligations and the unique facts of each particular agreement. Historically, payments made by the Company under these agreements have not been material. As of March 31, 2024, the Company did not have any material payment obligations under any such indemnification agreements.

Leases

Leases	3 Months Ended
	Mar. 31, 2024
Leases [Abstract]
Leases	Leases The Company’s leasing activities are primarily for facilities under cancelable and non-cancelable lease agreements expiring during 2024 and through 2038. These facilities support our executive and administrative activities, sales, systems support, operations, and other functions. The Company also has leases for office equipment and other assets, which are not significant. Certain of these lease agreements include (i) renewal options to extend the lease term for up to ten years and/or (ii) options to terminate the agreement within one year. Additionally, certain of the Company’s lease agreements provide standard recurring escalations of lease payments for, among other things, increases in a lessor’s maintenance costs and taxes. Under some lease agreements, the Company may be entitled to allowances, free rent, lessor-financed tenant improvements and other incentives. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants. The Company subleases certain office space that it does not intend to occupy. Such sublease arrangements expire during 2024 and through 2032 and primarily relate to facilities in Arlington, Virginia. Certain of the Company’s sublease agreements: (i) include renewal and termination options; (ii) provide for customary escalations of lease payments in the normal course of business; and (iii) grant the subtenant certain allowances, free rent, Gartner-financed tenant improvements and other incentives. All of the Company’s leasing and subleasing activity is recognized in Selling, general and administrative expense in the accompanying Condensed Consolidated Statements of Operations. The table below presents the Company’s net lease cost and certain other information related to the Company’s leasing activities as of and for the periods indicated (dollars in thousands). Three Months Ended March 31, Description: 2024 2023 Operating lease cost (1) $ 25,903 $ 28,799 Lease cost (2) 5,631 4,720 Sublease income (11,882) (12,641) Total lease cost, net (3) (4) $ 19,652 $ 20,878 Cash paid for amounts included in the measurement of operating lease liabilities $ 34,049 $ 34,948 Cash receipts from sublease arrangements $ 11,110 $ 12,439 Right-of-use assets obtained in exchange for new operating lease liabilities $ 6,791 $ 1,647 (1) Included in operating lease cost was $9.2 million and $10.6 million for the three months ended March 31, 2024 and 2023, respectively, for costs related to subleasing activities. (2) These amounts are primarily variable lease and nonlease costs that are not fixed at the lease commencement date or are dependent on something other than an index or a rate. (3) The Company did not capitalize any operating lease costs during any of the periods presented. (4) Amount excludes impairment charges on lease related assets, as discussed below. The table below indicates where the discounted operating lease payments from the above table are classified in the accompanying Condensed Consolidated Balance Sheets (in thousands). March 31, December 31, Description: 2024 2023 Accounts payable and accrued liabilities $ 98,558 $ 98,493 Operating lease liabilities 491,182 513,406 Total operating lease liabilities included in the Condensed Consolidated Balance Sheets $ 589,740 $ 611,899 As a result and in consideration of the changing nature of the Company’s use of office space, the Company continues to evaluate its existing real estate lease portfolio. In connection with this evaluation, the Company reviewed certain of its right-of-use assets and related other long-lived assets for impairment under ASC 360. As a result of the evaluation, the Company recognized impairment losses during the three months ended March 31, 2024 and 2023 of $0.5 million and $8.7 million, respectively, which are included as a component of Selling, general and administrative expenses in the accompanying Condensed Consolidated Statements of Operations. The impairment losses recorded include $0.4 million and $6.3 million related to right-of-use assets and $0.1 million and $2.4 million related to other long-lived assets, primarily leasehold improvements, for the three months ended March 31, 2024 and 2023, respectively. The fair values for the asset groups relating to the impaired long-lived assets were estimated primarily using discounted cash flow models (income approach) with Level 3 inputs. The significant assumptions used in estimating fair values include the expected downtime prior to the commencement of future subleases, projected sublease income over the remaining lease periods and discount rates that reflect the level of risk associated with receiving future cash flows.
Leases	Leases The Company’s leasing activities are primarily for facilities under cancelable and non-cancelable lease agreements expiring during 2024 and through 2038. These facilities support our executive and administrative activities, sales, systems support, operations, and other functions. The Company also has leases for office equipment and other assets, which are not significant. Certain of these lease agreements include (i) renewal options to extend the lease term for up to ten years and/or (ii) options to terminate the agreement within one year. Additionally, certain of the Company’s lease agreements provide standard recurring escalations of lease payments for, among other things, increases in a lessor’s maintenance costs and taxes. Under some lease agreements, the Company may be entitled to allowances, free rent, lessor-financed tenant improvements and other incentives. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants. The Company subleases certain office space that it does not intend to occupy. Such sublease arrangements expire during 2024 and through 2032 and primarily relate to facilities in Arlington, Virginia. Certain of the Company’s sublease agreements: (i) include renewal and termination options; (ii) provide for customary escalations of lease payments in the normal course of business; and (iii) grant the subtenant certain allowances, free rent, Gartner-financed tenant improvements and other incentives. All of the Company’s leasing and subleasing activity is recognized in Selling, general and administrative expense in the accompanying Condensed Consolidated Statements of Operations. The table below presents the Company’s net lease cost and certain other information related to the Company’s leasing activities as of and for the periods indicated (dollars in thousands). Three Months Ended March 31, Description: 2024 2023 Operating lease cost (1) $ 25,903 $ 28,799 Lease cost (2) 5,631 4,720 Sublease income (11,882) (12,641) Total lease cost, net (3) (4) $ 19,652 $ 20,878 Cash paid for amounts included in the measurement of operating lease liabilities $ 34,049 $ 34,948 Cash receipts from sublease arrangements $ 11,110 $ 12,439 Right-of-use assets obtained in exchange for new operating lease liabilities $ 6,791 $ 1,647 (1) Included in operating lease cost was $9.2 million and $10.6 million for the three months ended March 31, 2024 and 2023, respectively, for costs related to subleasing activities. (2) These amounts are primarily variable lease and nonlease costs that are not fixed at the lease commencement date or are dependent on something other than an index or a rate. (3) The Company did not capitalize any operating lease costs during any of the periods presented. (4) Amount excludes impairment charges on lease related assets, as discussed below. The table below indicates where the discounted operating lease payments from the above table are classified in the accompanying Condensed Consolidated Balance Sheets (in thousands). March 31, December 31, Description: 2024 2023 Accounts payable and accrued liabilities $ 98,558 $ 98,493 Operating lease liabilities 491,182 513,406 Total operating lease liabilities included in the Condensed Consolidated Balance Sheets $ 589,740 $ 611,899 As a result and in consideration of the changing nature of the Company’s use of office space, the Company continues to evaluate its existing real estate lease portfolio. In connection with this evaluation, the Company reviewed certain of its right-of-use assets and related other long-lived assets for impairment under ASC 360. As a result of the evaluation, the Company recognized impairment losses during the three months ended March 31, 2024 and 2023 of $0.5 million and $8.7 million, respectively, which are included as a component of Selling, general and administrative expenses in the accompanying Condensed Consolidated Statements of Operations. The impairment losses recorded include $0.4 million and $6.3 million related to right-of-use assets and $0.1 million and $2.4 million related to other long-lived assets, primarily leasehold improvements, for the three months ended March 31, 2024 and 2023, respectively. The fair values for the asset groups relating to the impaired long-lived assets were estimated primarily using discounted cash flow models (income approach) with Level 3 inputs. The significant assumptions used in estimating fair values include the expected downtime prior to the commencement of future subleases, projected sublease income over the remaining lease periods and discount rates that reflect the level of risk associated with receiving future cash flows.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net income	$ 210,545	$ 295,783

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Business and Basis of Present_2

Business and Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Segments	Segments . Gartner delivers its products and services globally through three business segments: Research, Conferences and Consulting. Revenues and other financial information for the Company’s segments are discussed in Note 7 — Segment Information.
Basis of presentation	Basis of presentation . The accompanying interim Condensed Consolidated Financial Statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”), as defined in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 270 for interim financial information and with the applicable instructions of U.S. Securities and Exchange Commission (“SEC”) Rule 10-01 of Regulation S-X on Form 10-Q, and should be read in conjunction with the consolidated financial statements and related notes of the Company in its Annual Report on Form 10-K for the year ended December 31, 2023. The fiscal year of Gartner is the twelve-month period from January 1 through December 31. In the opinion of management, all normal recurring accruals and adjustments considered necessary for a fair presentation of financial position, results of operations and cash flows at the dates and for the periods presented herein have been included. The results of operations for the three
Principles of consolidation	Principles of consolidation . The accompanying interim Condensed Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated.
Use of estimates	Use of estimates . The preparation of the accompanying interim Condensed Consolidated Financial Statements requires management to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the amounts of assets and liabilities reported, disclosures about contingent assets and liabilities, and reported amounts of revenues and expenses. Such estimates include the valuation of fees receivable, goodwill, intangible assets and other long-lived assets, as well as tax accruals and other liabilities. In addition, estimates are used in revenue recognition, income tax expense or benefit, performance-based compensation charges, depreciation and amortization. Management believes its use of estimates in these interim Condensed Consolidated Financial Statements to be reasonable. Management continually evaluates and revises its estimates using historical experience and other factors, including the general economic environment and actions it may take in the future. Management adjusts these estimates when facts and circumstances dictate. However, these estimates may involve significant uncertainties and judgments and cannot be determined with precision. In addition, these estimates are based on management’s best judgment at a point in time. As a result, differences between estimates and actual results could be material and would be reflected in the Company’s consolidated financial statements in future periods.
Cash and cash equivalents and restricted cash	Cash and cash equivalents and restricted cash. Below is a table presenting the beginning-of-period and end-of-period cash amounts from the Company’s Condensed Consolidated Balance Sheets and the total cash amounts presented in the Condensed Consolidated Statements of Cash Flows (in thousands). March 31, December 31, 2024 2023 Cash and cash equivalents $ 1,235,801 $ 1,318,999 Restricted cash classified in (1): Prepaid expenses and other current assets 600 600 Cash and cash equivalents and restricted cash $ 1,236,401 $ 1,319,599 (1) Restricted cash consisted of an escrow account established in connection with one of the Company’s business acquisitions. Generally, such cash is restricted to use due to provisions contained in the underlying acquisition agreement. The Company will disburse the restricted cash to the sellers of the business upon satisfaction of any contingencies described in such agreements (e.g., potential indemnification claims, etc.).
Revenue recognition	Revenue recognition. Revenue is recognized in accordance with the requirements of FASB ASC Topic 606, Revenue from Contracts with Customers
Adoption of new accounting standards	Accounting standards issued but not yet adopted. The FASB has issued an accounting standard that has not yet become effective as of March 31, 2024 and may impact the Company’s Consolidated Financial Statements or related disclosures in future periods. The standard and its potential impact are discussed below. Income Taxes — In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures (“ASU No. 2023-09”). The amendments in this ASU are expected to enhance the transparency and decision usefulness of income tax disclosures. ASU 2023-09 requires entities to enhance income tax disclosures primarily related to the rate reconciliation and income taxes paid information. Companies will need to disaggregate the disclosure of income taxes paid (net of refunds received) by federal, state, and foreign taxes on an annual basis. Additionally, on an annual basis, companies would disclose income taxes paid disaggregated by individual jurisdiction using a quantitative threshold of 5% of total income taxes paid. Public business entities would also be required to provide, on an annual basis, rate reconciliation information by specific categories, including state and local income tax, the effect of cross-border tax laws, foreign tax effects, changes in prior year unrecognized tax benefits, and tax credits, among others. Additionally, some categories would then require disaggregation based on a quantitative threshold of 5%. The foreign tax effect category requires disaggregation by both jurisdiction and nature. The ASU also requires additional qualitative disclosures. All public entities will be required to report income tax information in accordance with the new guidance starting in annual periods beginning after December 15, 2024. The Company expects this ASU to only impact its disclosures with no impacts to the Company’s results of operations, cash flows, and financial condition. Segment Reporting — In November 2023, the FASB issued ASU 2023-07, Segment Reporting: Improvements in Reportable Segment Disclosures (“ASU No. 2023-07”). The amendments in the ASU are expected to improve disclosures about a public entity’s reportable segments and addresses requests from investors and other allocators or capital for additional, more detailed information about a reportable segment’s expenses. ASU 2023-07 requires public companies to disclose, on an annual and interim basis, significant expenses that are regularly provided to the chief operating decision maker (CODM) and included within each reported measure of segment profit and loss. The amendments in the ASU require that a public company provide all annual disclosures about a reportable segment’s profit or loss and assets currently required under ASC 280 in interim periods. The amendments in the ASU also require that a public entity disclose, on an annual and interim basis, an amount for other segment items by reportable segment and a description of its composition. The other segment items category is the difference between segment revenue less the significant expenses disclosed and each reported measure of segment profit or loss. The amendments in the ASU, among other items, also requires that a public company disclose the title and position of the CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources. The ASU applies to all public entities that are required to report segment information in accordance with Topic 280. All public entities will be required to report segment information in accordance with the new guidance starting in annual periods beginning after December 15, 2023 and for interim periods within annual periods beginning after December 15, 2024. The Company expects this ASU to only impact its disclosures with no impacts to the Company’s results of operations, cash flows, and financial condition.

Business and Basis of Present_3

Business and Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Cash and Cash Equivalents	Below is a table presenting the beginning-of-period and end-of-period cash amounts from the Company’s Condensed Consolidated Balance Sheets and the total cash amounts presented in the Condensed Consolidated Statements of Cash Flows (in thousands). March 31, December 31, 2024 2023 Cash and cash equivalents $ 1,235,801 $ 1,318,999 Restricted cash classified in (1): Prepaid expenses and other current assets 600 600 Cash and cash equivalents and restricted cash $ 1,236,401 $ 1,319,599 (1) Restricted cash consisted of an escrow account established in connection with one of the Company’s business acquisitions. Generally, such cash is restricted to use due to provisions contained in the underlying acquisition agreement. The Company will disburse the restricted cash to the sellers of the business upon satisfaction of any contingencies described in such agreements (e.g., potential indemnification claims, etc.).
Restrictions on Cash and Cash Equivalents	Below is a table presenting the beginning-of-period and end-of-period cash amounts from the Company’s Condensed Consolidated Balance Sheets and the total cash amounts presented in the Condensed Consolidated Statements of Cash Flows (in thousands). March 31, December 31, 2024 2023 Cash and cash equivalents $ 1,235,801 $ 1,318,999 Restricted cash classified in (1): Prepaid expenses and other current assets 600 600 Cash and cash equivalents and restricted cash $ 1,236,401 $ 1,319,599 (1) Restricted cash consisted of an escrow account established in connection with one of the Company’s business acquisitions. Generally, such cash is restricted to use due to provisions contained in the underlying acquisition agreement. The Company will disburse the restricted cash to the sellers of the business upon satisfaction of any contingencies described in such agreements (e.g., potential indemnification claims, etc.).

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of changes to the carrying amount of goodwill by reporting unit	The table below presents changes to the carrying amount of goodwill by segment during the three months ended March 31, 2024 (in thousands). Research Conferences Consulting Total Balance at December 31, 2023 (1) $ 2,657,549 $ 183,997 $ 95,714 $ 2,937,260 Foreign currency translation impact (2,634) (34) (194) (2,862) Balance at March 31, 2024 (1) $ 2,654,915 $ 183,963 $ 95,520 $ 2,934,398 (1) The Company does not have any accumulated goodwill impairment losses.
Schedule of amortizable intangible assets	The tables below present reconciliations of the carrying amounts of the Company’s finite-lived intangible assets as of the dates indicated (in thousands). March 31, 2024 Customer Technology-related Other Total Gross cost at December 31, 2023 $ 1,077,183 $ 11,200 $ 10,200 $ 1,098,583 Foreign currency translation impact (2,699) — — (2,699) Gross cost 1,074,484 11,200 10,200 1,095,884 Accumulated amortization (1) (601,317) (10,267) (6,599) (618,183) Balance at March 31, 2024 $ 473,167 $ 933 $ 3,601 $ 477,701 December 31, 2023 Customer Technology-related Other Total Gross cost $ 1,077,183 11,200 $ 10,200 $ 1,098,583 Accumulated amortization (1) (580,937) (9,333) (6,355) (596,625) Balance at December 31, 2023 $ 496,246 $ 1,867 $ 3,845 $ 501,958 (1) Finite-lived intangible assets are amortized using the straight-line method over the following periods: Customer relationships—6 to 13 years; Technology-related—3 years; and Other—11 years.
Schedule of estimated future amortization expense by year	The estimated future amortization expense by year for finite-lived intangible assets is presented in the table below (in thousands). 2024 (remaining nine months) $ 66,973 2025 81,263 2026 78,589 2027 77,980 2028 76,509 Thereafter 96,387 $ 477,701

Revenue and Related Matters (Ta

Revenue and Related Matters (Tables)	3 Months Ended
	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue by Reportable Segment	Disaggregated Revenue — The Company’s disaggregated revenue by reportable segment is presented in the tables below for the periods indicated (in thousands). By Primary Geographic Market (1) Three Months Ended March 31, 2024 Primary Geographic Market Research Conferences Consulting Total United States and Canada $ 835,221 $ 48,090 $ 78,539 $ 961,850 Europe, Middle East and Africa 287,543 10,328 36,602 334,473 Other International 145,408 11,651 19,544 176,603 Total revenues $ 1,268,172 $ 70,069 $ 134,685 $ 1,472,926 Three Months Ended March 31, 2023 Primary Geographic Market Research Conferences Consulting Total United States and Canada $ 809,399 $ 48,775 $ 76,975 $ 935,149 Europe, Middle East and Africa 268,657 9,207 32,938 310,802 Other International 139,135 6,660 17,123 162,918 Total revenues $ 1,217,191 $ 64,642 $ 127,036 $ 1,408,869 (1) Revenue is reported based on where the sale is fulfilled.
Schedule of Disaggregation of Revenue	By Timing of Revenue Recognition Three Months Ended March 31, 2024 Timing of Revenue Recognition Research Conferences Consulting Total Transferred over time (1) $ 1,182,268 $ — $ 108,587 $ 1,290,855 Transferred at a point in time (2) 85,904 70,069 26,098 182,071 Total revenues $ 1,268,172 $ 70,069 $ 134,685 $ 1,472,926 Three Months Ended March 31, 2023 Timing of Revenue Recognition Research Conferences Consulting Total Transferred over time (1) $ 1,109,796 $ — $ 97,006 $ 1,206,802 Transferred at a point in time (2) 107,395 64,642 30,030 202,067 Total revenues $ 1,217,191 $ 64,642 $ 127,036 $ 1,408,869 (1) Research revenues in this category are recognized in connection with performance obligations that are satisfied over time using a time-elapsed output method to measure progress. Consulting revenues in this category are recognized over time using costs incurred to date relative to total estimated costs at completion. (2) The revenues in this category are recognized in connection with performance obligations that are satisfied at the point in time that the contractual deliverables are provided to the customer.
Schedule for Contract with Customer, Asset and Liability	The table below provides information regarding certain of the Company’s balance sheet accounts that pertain to its contracts with customers (in thousands). March 31, December 31, 2024 2023 Assets: Fees receivable, gross (1) $ 1,574,960 $ 1,610,228 Contract assets recorded in Prepaid expenses and other current assets (2) $ 29,773 $ 28,791 Contract liabilities: Deferred revenues (current liability) (3) $ 2,796,016 $ 2,640,515 Non-current deferred revenues recorded in Other liabilities (3) 24,523 33,490 Total contract liabilities $ 2,820,539 $ 2,674,005 (1) Fees receivable represent an unconditional right to payment from the Company’s customers and include both billed and unbilled amounts. (2) Contract assets represent recognized revenue for which the Company does not have an unconditional right to payment as of the balance sheet date because the project may be subject to a progress billing milestone or some other billing restrictions. (3) Deferred revenues represent amounts (i) for which the Company has received an upfront customer payment or (ii) that pertain to recognized fees receivable. Both situations occur before the completion of the Company’s performance obligation(s).

Computation of Earnings Per S_2

Computation of Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Schedule Of Basic And Diluted Earnings Per Share Calculations	The table below sets forth the calculation of basic and diluted income per share for the periods indicated (in thousands, except per share data). Three Months Ended March 31, 2024 2023 Numerator: Net income used for calculating basic and diluted income per share $ 210,545 $ 295,783 Denominator: Weighted average common shares used in the calculation of basic income per share 78,339 79,452 Dilutive effect of outstanding awards associated with stock-based compensation plans (1) 625 830 Shares used in the calculation of diluted income per share 78,964 80,282 Basic income per share $ 2.69 $ 3.72 Diluted income per share $ 2.67 $ 3.68 (1) Certain outstanding awards associated with stock-based compensation plans were not included in the computation of diluted income per share because the effect would have been anti-dilutive. These anti-dilutive outstanding awards

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]
Schedule Of Stock-based Compensation Expense By Award Type	The tables below summarize the Company’s stock-based compensation expense by award type and expense category line item during the periods indicated (in millions). Three Months Ended March 31, Award type 2024 2023 Stock appreciation rights $ 4.6 $ 2.5 Restricted stock units 45.6 42.2 Common stock equivalents 0.3 0.3 Total (1) $ 50.5 $ 45.0
Schedule Of Stock-Based Compensation Expense By Expense Category	Three Months Ended March 31, Expense category line item 2024 2023 Cost of services and product development $ 19.5 $ 18.3 Selling, general and administrative 31.0 26.7 Total (1) $ 50.5 $ 45.0 (1) Includes costs of $30.6 million and $26.8 million during the three months ended March 31, 2024 and 2023, respectively, for awards to retirement-eligible employees. Those awards vest on an accelerated basis.

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2024
Segment Reporting [Abstract]
Schedule of Segment Reporting Information by Segment	The tables below present information about the Company’s reportable segments for the periods indicated (in thousands). Three Months Ended March 31, 2024 Research Conferences Consulting Consolidated Revenues $ 1,268,172 $ 70,069 $ 134,685 $ 1,472,926 Gross contribution 944,570 23,255 54,287 1,022,112 Corporate and other expenses (748,227) Operating income $ 273,885 Three Months Ended March 31, 2023 Research Conferences Consulting Consolidated Revenues $ 1,217,191 $ 64,642 $ 127,036 $ 1,408,869 Gross contribution 899,514 26,788 50,808 977,110 Corporate and other expenses (569,153) Operating income $ 407,957
Schedule of Reconciliation of Segment Gross Contribution to Net Income	The table below provides a reconciliation of total segment gross contribution to net income for the periods indicated (in thousands). Three Months Ended March 31, 2024 2023 Total segment gross contribution $ 1,022,112 $ 977,110 Costs and expenses: Cost of services and product development - unallocated (1) 8,627 3,380 Selling, general and administrative 689,833 657,090 Depreciation and amortization 49,307 46,631 Acquisition and integration charges 460 1,368 Gain from sale of divested operation — (139,316) Operating income 273,885 407,957 Interest expense and other, net (14,328) (29,757) Gain on event cancellation insurance claims — 3,077 Less: Provision for income taxes 49,012 85,494 Net income $ 210,545 $ 295,783 (1) The unallocated amounts consist of certain bonus and fringe costs recorded in consolidated Cost of services and product development that are not allocated to segment expense. The Company’s policy is to allocate bonuses to segments at 100% of a segment employee’s target bonus. Amounts above or below 100% are absorbed by corporate.

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Schedule of Debt	The Company’s total outstanding borrowings are summarized in the table below (in thousands). March 31, December 31, Description 2024 2023 2024 Credit Agreement - Revolving facility (1), (2) $ 274,400 $ — 2020 Credit Agreement - Term loan facility — 274,400 2020 Credit Agreement - Revolving credit facility — — 4.50% Senior Notes due 2028 (“2028 Notes”) 800,000 800,000 3.625% Senior Notes due 2029 (“2029 Notes”) 600,000 600,000 3.75% Senior Notes due 2030 (“2030 Notes”) 800,000 800,000 Other (3) 5,000 5,000 Principal amount outstanding (4) 2,479,400 2,479,400 Less: deferred financing fees (5) (22,523) (21,104) Net balance sheet carrying amount $ 2,456,877 $ 2,458,296 (1) The contractual annualized interest rate as of March 31, 2024 on the 2024 Credit Agreement was 6.725%, which consisted of Term Secured Overnight Financing Rate (“SOFR”) of 5.375% plus a margin of 1.350%. However, the Company has an interest rate swap contract that effectively converts the floating SOFR on outstanding amounts to a fixed base rate. (2) The Company had approximately $0.7 billion of available borrowing capacity on the 2024 Credit Agreement revolver (not including the expansion feature) as of March 31, 2024. (3) Consists of a State of Connecticut economic development loan originated in 2019 with a 10-year maturity and bears interest at a fixed rate of 1.75%. This loan may be repaid at any time by the Company without penalty. (4) The weighted average annual effective rate on the Company’s outstanding debt for the three months ended March 31, 2024, including the effects of its interest rate swaps discussed below, was 5.01%. (5) Deferred financing fees are being amortized to Interest expense, net over the term of the related debt obligation.

Equity (Tables)

Equity (Tables)	3 Months Ended
	Mar. 31, 2024
Stockholders' Equity Note [Abstract]
Schedule Of Share Repurchase Activity	The Company’s share repurchase activity is presented in the table below for the periods indicated. Three Months Ended March 31, 2024 2023 Number of shares repurchased (1) 489,734 327,680 Cash paid for repurchased shares (in thousands) (2) $ 225,124 $ 106,850 (1) The average purchase price for repurchased shares was $459.69 and $332.18 for the three months ended March 31, 2024 and 2023, respectively. The repurchased shares during the three months ended March 31, 2024 and 2023 included purchases for both open market purchases and stock-based compensation award settlements. (2) The cash paid for repurchased shares during the three months ended March 31, 2023 excluded $2.0 million of open market purchases with trade dates in March 2023 that settled in April 2023.
Schedule Of The Changes In Accumulated Other Comprehensive Loss By Component (Net Of Tax)	The tables below provide information about the changes in AOCL by component and the related amounts reclassified out of AOCL to income during the periods indicated (net of tax, in thousands) (1). Three Months Ended March 31, 2024 Interest Rate Defined Foreign Total Balance – December 31, 2023 $ (24,162) $ (5,731) $ (46,438) $ (76,331) Other comprehensive income (loss) activity during the period: Change in AOCL before reclassifications to income — — (9,707) (9,707) Reclassifications from AOCL to income (2), (3) 3,601 51 — 3,652 Other comprehensive income (loss), net 3,601 51 (9,707) (6,055) Balance – March 31, 2024 $ (20,561) $ (5,680) $ (56,145) $ (82,386) Three Months Ended March 31, 2023 Interest Rate Defined Foreign Total Balance – December 31, 2022 $ (39,248) $ (4,247) $ (58,115) $ (101,610) Other comprehensive income (loss) activity during the period: Change in AOCL before reclassifications to income — — 1,832 1,832 Reclassifications from AOCL to income (2), (3) 3,834 34 — 3,868 Other comprehensive income (loss), net 3,834 34 1,832 5,700 Balance – March 31, 2023 $ (35,414) $ (4,213) $ (56,283) $ (95,910) (1) Amounts in parentheses represent debits (deferred losses). (2) $4.8 million and $5.1 million of the reclassifications related to interest rate swaps (cash flow hedges) were recorded in Interest expense, net, for the three months ended March 31, 2024 and 2023, respectively. See Note 8 — Debt and Note 11 — Derivatives and Hedging for information regarding the cash flow hedges. (3)

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	3 Months Ended
	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional Amounts of Outstanding Derivative Positions	The tables below provide information regarding the Company’s outstanding derivative contracts as of the dates indicated (in thousands, except for number of contracts). March 31, 2024 Derivative Contract Type Number of Notional Fair Value Balance Unrealized Interest rate swap (1) 1 $ 350,000 $ 2,374 Other assets $ (20,561) 7,060 Other current assets Foreign currency forwards (2) 31 186,470 (180) Accrued liabilities — Total 32 $ 536,470 $ 9,254 $ (20,561) December 31, 2023 Derivative Contract Type Number of Contracts Notional Fair Value Balance Unrealized Interest rate swap (1) 1 $ 350,000 $ 1,097 Other assets $ (24,162) 5,962 Other current assets Foreign currency forwards (2) 111 525,719 180 Other current assets — Total 112 $ 875,719 $ 7,239 $ (24,162) (1) Effective June 30, 2020, the Company de-designated all of its interest rate swaps and discontinued hedge accounting. Accordingly, subsequent changes to fair value of the interest rate swap are recorded in Other income (expense), net. The amounts previously recorded in Accumulated other comprehensive loss are amortized into Interest expense, net over the terms of the hedged forecasted interest payments. See Note 8 — Debt for additional information regarding the Company’s interest rate swap contract. (2) The Company has foreign exchange transaction risk because it typically enters into transactions in the normal course of business that are denominated in foreign currencies that differ from the local functional currency. The Company enters into short-term foreign currency forward exchange contracts to mitigate the cash flow risk associated with changes in foreign currency rates on forecasted foreign currency transactions. These contracts are accounted for at fair value with realized and unrealized gains and losses recognized in Other income (expense), net because the Company does not designate these contracts as hedges for accounting purposes. All of the outstanding foreign currency forward exchange contracts at March 31, 2024 matured before April 30, 2024. (3) See Note 12 — Fair Value Disclosures for the determination of the fair values of these instruments.
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance	The table below provides information regarding amounts recognized in the accompanying Condensed Consolidated Statements of Operations for derivative contracts for the periods indicated (in thousands). Three Months Ended March 31, Amount recorded in: 2024 2023 Interest expense, net (1) $ 4,806 $ 5,117 Other (income) expense, net (4,314) 1,904 Total (income) expense, net $ 492 $ 7,021 (1) Consists of interest expense from interest rate swap contracts. (2)

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured to Fair Value on Recurring Basis	The table below presents the fair values of certain financial assets and liabilities that are measured at fair value on a recurring basis in the Company's financial statements (in thousands). Description March 31, December 31, Assets: Values based on Level 1 inputs: Deferred compensation plan assets (1) $ 20,421 $ 10,290 Total Level 1 inputs 20,421 10,290 Values based on Level 2 inputs: Deferred compensation plan assets (1) 112,690 104,555 Foreign currency forward contracts (2) 82 1,646 Interest rate swap contract (3) 9,434 7,059 Total Level 2 inputs 122,206 113,260 Total Assets $ 142,627 $ 123,550 Liabilities: Values based on Level 2 inputs: Deferred compensation plan liabilities (1) $ 136,246 $ 121,708 Foreign currency forward contracts (2) 262 1,466 Total Level 2 inputs 136,508 123,174 Total Liabilities $ 136,508 $ 123,174 (1) The Company has a deferred compensation plan for the benefit of certain highly compensated officers, managers and other key employees. The assets consist of investments in money market funds, mutual funds and company-owned life insurance contracts, which are valued based on Level 1 or Level 2 inputs. The related deferred compensation plan liabilities are recorded at fair value, or the estimated amount needed to settle the liability, which the Company considers to be a Level 2 input. (2) The Company enters into foreign currency forward exchange contracts to hedge the effects of adverse fluctuations in foreign currency exchange rates (see Note 11 — Derivatives and Hedging). Valuation of these contracts is based on observable foreign currency exchange rates in active markets, which the Company considers to be a Level 2 input. (3) The Company has an interest rate swap contract that hedges the risk of variability from interest payments on its borrowings (see Note 8 — Debt). The fair value of the interest rate swap is based on mark-to-market valuations prepared by a third-party broker. This valuation is based on observable interest rates from recently executed market transactions and other observable market data, which the Company considers to be Level 2 inputs. The Company independently corroborates the reasonableness of the valuations prepared by the third-party broker by using an electronic quotation service.
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	The table below presents the carrying amounts (net of deferred financing costs) and fair values of financial instruments that are not recorded at fair value in the Company’s Condensed Consolidated Balance Sheets (in thousands). The estimated fair value of the financial instruments was derived from quoted market prices provided by an independent dealer, which the Company considers to be a Level 2 input. Carrying Amount Fair Value March 31, December 31, March 31, December 31, Description 2024 2023 2024 2023 2028 Notes $ 794,384 $ 794,088 $ 763,032 $ 759,040 2029 Notes 595,009 594,794 541,800 543,408 2030 Notes 793,411 793,189 715,496 709,600 Total $ 2,182,804 $ 2,182,071 $ 2,020,328 $ 2,012,048

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2024
Leases [Abstract]
Lease Costs	The table below presents the Company’s net lease cost and certain other information related to the Company’s leasing activities as of and for the periods indicated (dollars in thousands). Three Months Ended March 31, Description: 2024 2023 Operating lease cost (1) $ 25,903 $ 28,799 Lease cost (2) 5,631 4,720 Sublease income (11,882) (12,641) Total lease cost, net (3) (4) $ 19,652 $ 20,878 Cash paid for amounts included in the measurement of operating lease liabilities $ 34,049 $ 34,948 Cash receipts from sublease arrangements $ 11,110 $ 12,439 Right-of-use assets obtained in exchange for new operating lease liabilities $ 6,791 $ 1,647 (1) Included in operating lease cost was $9.2 million and $10.6 million for the three months ended March 31, 2024 and 2023, respectively, for costs related to subleasing activities. (2) These amounts are primarily variable lease and nonlease costs that are not fixed at the lease commencement date or are dependent on something other than an index or a rate. (3) The Company did not capitalize any operating lease costs during any of the periods presented. (4) Amount excludes impairment charges on lease related assets, as discussed below.
Supplemental Balance Sheet Information	The table below indicates where the discounted operating lease payments from the above table are classified in the accompanying Condensed Consolidated Balance Sheets (in thousands). March 31, December 31, Description: 2024 2023 Accounts payable and accrued liabilities $ 98,558 $ 98,493 Operating lease liabilities 491,182 513,406 Total operating lease liabilities included in the Condensed Consolidated Balance Sheets $ 589,740 $ 611,899

Business and Basis of Present_4

Business and Basis of Presentation - Narrative (Details) $ in Millions		3 Months Ended
	Feb. 28, 2023 USD ($)	Mar. 31, 2024 segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments | segment		3
Proceeds from event cancellation insurance claims | $	$ 3.1

Business and Basis of Present_5

Business and Basis of Presentation - Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 1,235,801	$ 1,318,999
Prepaid expenses and other current assets	600	600
Cash and cash equivalents and restricted cash	$ 1,236,401	$ 1,319,599	$ 894,112	$ 698,599

Acquisition and Divestiture (De

Acquisition and Divestiture (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Sep. 30, 2023	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Feb. 28, 2023
Business Acquisition [Line Items]
Gain from sale of divested operation		$ 0	$ 139,316
TalentNeuron
Business Acquisition [Line Items]
Gain from sale of divested operation		139,300		$ 135,400
TalentNeuron
Business Acquisition [Line Items]
Sale of business, consideration					$ 161,100
Gartner Research Products
Business Acquisition [Line Items]
Percent of outstanding membership interests acquired	100%
Purchase price	$ 7,900
Payment for contingent consideration liability, investing activities		$ 2,000

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Changes to the Carrying Amount of Goodwill by Segment (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Sep. 30, 2023
Goodwill [Line Items]
Goodwill impairment		$ 0
Goodwill [Roll Forward]
Beginning balance	$ 2,937,260,000
Foreign currency translation impact	(2,862,000)
Ending balance	2,934,398,000
Goodwill, accumulated impairment losses	0
Research
Goodwill [Roll Forward]
Beginning balance	2,657,549,000
Foreign currency translation impact	(2,634,000)
Ending balance	2,654,915,000
Conferences
Goodwill [Roll Forward]
Beginning balance	183,997,000
Foreign currency translation impact	(34,000)
Ending balance	183,963,000
Consulting
Goodwill [Roll Forward]
Beginning balance	95,714,000
Foreign currency translation impact	(194,000)
Ending balance	$ 95,520,000

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Carrying Amounts of Amortizable Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance	$ 1,098,583
Foreign currency translation impact	(2,699)
Gross cost, ending balance	1,095,884
Accumulated amortization	(618,183)		$ (596,625)
Finite-lived intangible assets, net	477,701		501,958
Amortization of intangibles	22,990	$ 22,735
Customer Relationships
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance	1,077,183
Foreign currency translation impact	(2,699)
Gross cost, ending balance	1,074,484
Accumulated amortization	(601,317)		(580,937)
Finite-lived intangible assets, net	$ 473,167		496,246
Customer Relationships | Minimum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	6 years
Customer Relationships | Maximum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	13 years
Technology-related
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance	$ 11,200
Foreign currency translation impact	0
Gross cost, ending balance	11,200
Accumulated amortization	(10,267)		(9,333)
Finite-lived intangible assets, net	$ 933		1,867
Remaining amortization period	3 years
Other
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance	$ 10,200
Foreign currency translation impact	0
Gross cost, ending balance	10,200
Accumulated amortization	(6,599)		(6,355)
Finite-lived intangible assets, net	$ 3,601		$ 3,845
Other | Maximum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	11 years

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Estimated Future Amortization Expense By Year From Amortizable Intangibles (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2024 (remaining nine months)	$ 66,973
2025	81,263
2026	78,589
2027	77,980
2028	76,509
Thereafter	96,387
Finite-lived intangible assets, net	$ 477,701	$ 501,958

Revenue and Related Matters - D

Revenue and Related Matters - Disaggregation of Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,472,926	$ 1,408,869
United States and Canada
Disaggregation of Revenue [Line Items]
Total revenues	961,850	935,149
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenues	334,473	310,802
Other International
Disaggregation of Revenue [Line Items]
Total revenues	176,603	162,918
Research
Disaggregation of Revenue [Line Items]
Total revenues	1,268,172	1,217,191
Research | United States and Canada
Disaggregation of Revenue [Line Items]
Total revenues	835,221	809,399
Research | Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenues	287,543	268,657
Research | Other International
Disaggregation of Revenue [Line Items]
Total revenues	145,408	139,135
Conferences
Disaggregation of Revenue [Line Items]
Total revenues	70,069	64,642
Conferences | United States and Canada
Disaggregation of Revenue [Line Items]
Total revenues	48,090	48,775
Conferences | Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenues	10,328	9,207
Conferences | Other International
Disaggregation of Revenue [Line Items]
Total revenues	11,651	6,660
Consulting
Disaggregation of Revenue [Line Items]
Total revenues	134,685	127,036
Consulting | United States and Canada
Disaggregation of Revenue [Line Items]
Total revenues	78,539	76,975
Consulting | Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenues	36,602	32,938
Consulting | Other International
Disaggregation of Revenue [Line Items]
Total revenues	$ 19,544	$ 17,123

Revenue and Related Matters - T

Revenue and Related Matters - Timing Of Revenue Recognition Liabilities per Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,472,926	$ 1,408,869
Transferred over time
Disaggregation of Revenue [Line Items]
Total revenues	1,290,855	1,206,802
Transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	182,071	202,067
Research
Disaggregation of Revenue [Line Items]
Total revenues	1,268,172	1,217,191
Research | Transferred over time
Disaggregation of Revenue [Line Items]
Total revenues	1,182,268	1,109,796
Research | Transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	85,904	107,395
Conferences
Disaggregation of Revenue [Line Items]
Total revenues	70,069	64,642
Conferences | Transferred over time
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Conferences | Transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	70,069	64,642
Consulting
Disaggregation of Revenue [Line Items]
Total revenues	134,685	127,036
Consulting | Transferred over time
Disaggregation of Revenue [Line Items]
Total revenues	108,587	97,006
Consulting | Transferred at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	$ 26,098	$ 30,030

Revenue and Related Matters - R

Revenue and Related Matters - Revenue Remaining Performance Obligation (Details) $ in Billions	Mar. 31, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	$ 5.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	$ 2.6
Revenue, remaining performance obligation, expected timing of satisfaction, period	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	$ 2.2
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	$ 0.8
Revenue, remaining performance obligation, expected timing of satisfaction, period

Revenue and Related Matters - S

Revenue and Related Matters - Schedule of Contract with Customer, Asset and Liability (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Assets:
Fees receivable, gross	$ 1,574,960		$ 1,610,228
Contract assets recorded in Prepaid expenses and other current assets	29,773		28,791
Contract liabilities:
Deferred revenues (current liability)	2,796,016		2,640,515
Non-current deferred revenues recorded in Other liabilities	24,523		33,490
Total contract liabilities	2,820,539		$ 2,674,005
Revenue recognized previously attributable to deferred revenues	$ 1,000,000	$ 900,000

Computation of Earnings Per S_3

Computation of Earnings Per Share - Calculations Of Basic And Diluted (Loss) Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator:
Net income used for calculating basic and diluted income per share	$ 210,545	$ 295,783
Denominator:
Weighted average number of common shares used in the calculation of basic income per share (in shares)	78,339	79,452
Dilutive effect of outstanding awards associated with stock-based compensation plans (in shares)	625	830
Shares used in the calculation of diluted income per share (in shares)	78,964	80,282
Basic income per share (in dollars per share)	$ 2.69	$ 3.72
Diluted income per share (in dollars per share)	$ 2.67	$ 3.68

Computation of Earnings Per S_4

Computation of Earnings Per Share - Additional information (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of (loss) income per share (in shares)	0	0.3

Stock-Based Compensation - Narr

Stock-Based Compensation - Narrative (Details) - $ / shares shares in Millions	Mar. 31, 2024	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Number of shares available for grant (in shares)	5.6
Common stock par value (in dollars per share)	$ 0.0005	$ 0.0005

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock-based Compensation Expense by Award Type and Expense Category (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 50.5	$ 45
Cost of services and product development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	19.5	18.3
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	31	26.7
Stock appreciation rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	4.6	2.5
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	45.6	42.2
Common stock equivalents
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	0.3	0.3
Retirement Eligible Employees Equity Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 30.6	$ 26.8

Segment Information - Informati

Segment Information - Information About Reportable Segments (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) segment	Mar. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	3
Operating income	$ 273,885,000	$ 407,957,000
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	0
Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,472,926,000	1,408,869,000
Operating income	1,022,112,000	977,110,000
Operating Segments | Research
Segment Reporting Information [Line Items]
Revenues	1,268,172,000	1,217,191,000
Operating income	944,570,000	899,514,000
Operating Segments | Conferences
Segment Reporting Information [Line Items]
Revenues	70,069,000	64,642,000
Operating income	23,255,000	26,788,000
Operating Segments | Consulting
Segment Reporting Information [Line Items]
Revenues	134,685,000	127,036,000
Operating income	54,287,000	50,808,000
Corporate and Reconciling Items
Segment Reporting Information [Line Items]
Operating income	$ (748,227,000)	$ (569,153,000)

Segment Information - Reconcili

Segment Information - Reconciliation of Segment Gross Contribution to Net Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment gross contribution	$ 273,885	$ 407,957
Costs and expenses:
Cost of services and product development - unallocated	459,441	435,139
Selling, general and administrative	689,833	657,090
Acquisition and integration charges	460	1,368
Gain from sale of divested operation	0	139,316
Operating income	273,885	407,957
Interest expense and other, net	(14,328)	(29,757)
Gain on event cancellation insurance claims	0	3,077
Less: Provision for income taxes	49,012	85,494
Net income	$ 210,545	295,783
Maximum
Costs and expenses:
Percent of target bonus charges allocated to segments	100%
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment gross contribution	$ 1,022,112	977,110
Costs and expenses:
Operating income	1,022,112	977,110
Corporate and Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment gross contribution	(748,227)	(569,153)
Costs and expenses:
Cost of services and product development - unallocated	8,627	3,380
Selling, general and administrative	689,833	657,090
Depreciation and amortization	49,307	46,631
Acquisition and integration charges	460	1,368
Operating income	$ (748,227)	$ (569,153)

Debt - Borrowings (Details)

Debt - Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Jun. 18, 2021	Sep. 28, 2020	Jun. 22, 2020
Debt Instrument [Line Items]
Principal amount outstanding	$ 2,479,400	$ 2,479,400
Less: deferred financing fees	(22,523)	(21,104)
Net balance sheet carrying amount	2,456,877	2,458,296
Unsecured Debt | Revolving credit facility | 2024 Credit Agreement
Debt Instrument [Line Items]
Principal amount outstanding	274,400	0
Term Loan Facility | 2020 Credit Agreement
Debt Instrument [Line Items]
Principal amount outstanding	0	274,400
Line of Credit | Revolving credit facility | 2020 Credit Agreement
Debt Instrument [Line Items]
Principal amount outstanding	0	0
Senior Notes | 2028 Notes
Debt Instrument [Line Items]
Principal amount outstanding	$ 800,000	$ 800,000
Debt instrument, fixed interest rate	4.50%	4.50%			4.50%
Senior Notes | 2029 Notes
Debt Instrument [Line Items]
Principal amount outstanding	$ 600,000	$ 600,000
Debt instrument, fixed interest rate	3.625%	3.625%	3.625%
Senior Notes | 2030 Notes
Debt Instrument [Line Items]
Principal amount outstanding	$ 800,000	$ 800,000
Debt instrument, fixed interest rate	3.75%	3.75%		3.75%
Other
Debt Instrument [Line Items]
Principal amount outstanding	$ 5,000	$ 5,000

Debt - Footnote to Borrowings (

Debt - Footnote to Borrowings (Details) - USD ($)		3 Months Ended
	Mar. 26, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 18, 2021	Sep. 28, 2020	Jun. 22, 2020
Debt Instrument [Line Items]
Weighted average effective rate		5.01%
Senior Notes | 2028 Notes
Debt Instrument [Line Items]
Debt instrument, fixed interest rate		4.50%	4.50%			4.50%
Aggregate principal amount						$ 800,000,000
Senior Notes | 2029 Notes
Debt Instrument [Line Items]
Debt instrument, fixed interest rate		3.625%	3.625%	3.625%
Aggregate principal amount				$ 600,000,000
Senior Notes | 2030 Notes
Debt Instrument [Line Items]
Debt instrument, fixed interest rate		3.75%	3.75%		3.75%
Aggregate principal amount					$ 800,000,000
Connecticut Economic Development Program | Economic Development Loan 2
Debt Instrument [Line Items]
Debt instrument, fixed interest rate		1.75%
Debt term		10 years
Unsecured Debt | Revolving credit facility | 2024 Credit Agreement
Debt Instrument [Line Items]
Contractual annualized interest rate		6.725%
Remaining borrowing capacity		$ 700,000,000
Aggregate principal amount	$ 1,000,000,000
Debt term	5 years
Unsecured Debt | Revolving credit facility | 2024 Credit Agreement | SOFR
Debt Instrument [Line Items]
Debt instrument, fixed interest rate		5.375%
Additional interest above base rate		0.10%

Debt - Narrative (Details)

Debt - Narrative (Details) - USD ($)					3 Months Ended
	Mar. 26, 2024	Jun. 18, 2021	Sep. 28, 2020	Jun. 22, 2020	Mar. 31, 2024	Dec. 31, 2023
2029 Notes | Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 600,000,000
Debt instrument, fixed interest rate		3.625%			3.625%	3.625%
Debt instrument, issue price, percent		100%
2029 Notes | Senior Notes | Debt Instrument Redemption Option One
Debt Instrument [Line Items]
Percentage of principal amount redeemed		40%
2030 Notes | Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount			$ 800,000,000
Debt instrument, fixed interest rate			3.75%		3.75%	3.75%
Debt instrument, issue price, percent			100%
Percentage of principal amount redeemed			40%
2028 Notes | Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount				$ 800,000,000
Debt instrument, fixed interest rate				4.50%	4.50%	4.50%
Debt instrument, issue price, percent				100%
Percentage of principal amount redeemed				40%
2020 Credit Agreement | Federal Reserve Board of New York Rate | Variable Rate Component One
Debt Instrument [Line Items]
Additional interest above base rate			0.50%
2020 Credit Agreement | Term Loan Facility
Debt Instrument [Line Items]
Aggregate principal amount			$ 400,000,000
Revolving credit facility | 2024 Credit Agreement | Unsecured Debt
Debt Instrument [Line Items]
Aggregate principal amount	$ 1,000,000,000
Debt term	5 years
Line of credit facility, additional borrowing capacity	$ 750,000,000
Long-term line of credit	$ 274,400,000
Revolving credit facility | 2024 Credit Agreement | Unsecured Debt | Minimum
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	0.125%
Revolving credit facility | 2024 Credit Agreement | Unsecured Debt | Maximum
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	0.25%
Revolving credit facility | 2024 Credit Agreement | Unsecured Debt | SOFR
Debt Instrument [Line Items]
Additional interest above base rate					0.10%
Debt instrument, fixed interest rate					5.375%
Revolving credit facility | 2024 Credit Agreement | Unsecured Debt | SOFR, plus additional 1% credit spread
Debt Instrument [Line Items]
Additional interest above base rate					1.35%
Revolving credit facility | 2024 Credit Agreement | Unsecured Debt | SOFR, plus additional 1% credit spread | Minimum
Debt Instrument [Line Items]
Additional interest above base rate	1.125%
Revolving credit facility | 2024 Credit Agreement | Unsecured Debt | SOFR, plus additional 1% credit spread | Maximum
Debt Instrument [Line Items]
Additional interest above base rate	1.75%
Revolving credit facility | 2020 Credit Agreement | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 1,000,000,000
Letter of Credit | 2024 Credit Agreement | Unsecured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 75,000,000

Debt - Interest Rate Swaps (Det

Debt - Interest Rate Swaps (Details) $ in Thousands	1 Months Ended
	May 31, 2023	Mar. 31, 2024 USD ($) contract	Dec. 31, 2023 USD ($) contract
Derivative [Line Items]
Number of contracts | contract		32	112
Interest rate swap contracts total notional value		$ 536,470	$ 875,719
Interest rate swaps
Derivative [Line Items]
Term of contract	30 days
Loss on release of interest rate swap recognized in AOCI		$ 27,500
Interest rate swaps | Minimum
Derivative [Line Items]
Fixed interest rate	2.98%
Interest rate swaps | Debt Instrument, Redemption, Period One
Derivative [Line Items]
Number of contracts | contract		1
Interest rate swap contracts total notional value		$ 350,000

Equity - Share Repurchase Progr

Equity - Share Repurchase Program and Share Repurchase Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2015
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount				$ 1,200,000
Stock repurchase program, additional authorized amount			$ 3,500,000
Stock repurchase program, remaining authorized repurchase amount	$ 831,300
Number of shares repurchased (in shares)	489,734	327,680
Cash paid for repurchased shares	$ 225,124	$ 106,850
Treasury stock, average price paid per share (in dollars per share)	$ 459.69	$ 332.18
Open Market Purchases, Excluded
Equity, Class of Treasury Stock [Line Items]
Cash paid for repurchased shares		$ 2,000

Equity - Changes in AOCI_L by C

Equity - Changes in AOCI/L by Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 680,634	$ 227,798
Change in AOCL before reclassifications to income	(9,707)	1,832
Reclassifications from AOCL to income	3,652	3,868
Other comprehensive income (loss), net of tax	(6,055)	5,700
Ending balance	718,174	472,858
Derivative reclassifications	(492)	(7,021)
Interest rate swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Derivative reclassifications	4,800	5,100
Loss to be reclassified within twelve months	18,700
Interest Rate Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(24,162)	(39,248)
Change in AOCL before reclassifications to income	0	0
Reclassifications from AOCL to income	3,601	3,834
Other comprehensive income (loss), net of tax	3,601	3,834
Ending balance	(20,561)	(35,414)
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(5,731)	(4,247)
Change in AOCL before reclassifications to income	0	0
Reclassifications from AOCL to income	51	34
Other comprehensive income (loss), net of tax	51	34
Ending balance	(5,680)	(4,213)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(46,438)	(58,115)
Change in AOCL before reclassifications to income	(9,707)	1,832
Reclassifications from AOCL to income	0	0
Other comprehensive income (loss), net of tax	(9,707)	1,832
Ending balance	(56,145)	(56,283)
Accumulated Other Comprehensive Loss, Net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(76,331)	(101,610)
Other comprehensive income (loss), net of tax	(6,055)	5,700
Ending balance	$ (82,386)	$ (95,910)

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 49,012	$ 85,494
Effective income tax rate	18.90%	22.40%
Unrecognized tax benefits	$ 152,400		$ 148,400
Unrecognized tax benefits reductions resulting from anticipated closure of audits and the expiration of certain statutes of limitation	$ 6,000
Deferred tax asset			103,100
Valuation allowance			$ 103,100

Derivatives and Hedging - Outst

Derivatives and Hedging - Outstanding Derivatives Contracts (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024 USD ($) contract	Dec. 31, 2023 USD ($) contract
Derivatives, Fair Value [Line Items]
Number of Contracts | contract	32	112
Notional Amounts	$ 536,470	$ 875,719
Fair Value Asset (Liability), Net	9,254	7,239
Unrealized Loss Recorded in AOCL, net of tax	$ (20,561)	$ (24,162)
Other assets | Interest rate swaps | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Number of Contracts | contract	1	1
Notional Amounts	$ 350,000	$ 350,000
Fair Value Asset (Liability), Net	2,374	1,097
Unrealized Loss Recorded in AOCL, net of tax	(20,561)	(24,162)
Other current assets | Interest rate swaps | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Fair Value Asset (Liability), Net	$ 7,060	$ 5,962
Other current assets | Foreign currency forwards | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Number of Contracts | contract		111
Notional Amounts		$ 525,719
Fair Value Asset (Liability), Net		180
Unrealized Loss Recorded in AOCL, net of tax		$ 0
Accrued liabilities | Foreign currency forwards | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Number of Contracts | contract	31
Notional Amounts	$ 186,470
Fair Value Asset (Liability), Net	(180)
Unrealized Loss Recorded in AOCL, net of tax	$ 0

Derivatives and Hedging - Deriv

Derivatives and Hedging - Derivative Gains And Losses That Have Been Recognized In Condensed Consolidated Statements Of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Total (income) expense, net	$ 492	$ 7,021
Interest expense (income), net
Derivative Instruments, Gain (Loss) [Line Items]
Total (income) expense, net	$ 4,806	$ 5,117
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other income (expense), net	Other income (expense), net
Other (income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Total (income) expense, net	$ (4,314)	$ 1,904
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other income (expense), net	Other income (expense), net

Fair Value Disclosures - Assets

Fair Value Disclosures - Assets And Liabilities Measured At Fair Value On Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets:
Total Assets	$ 142,627	$ 123,550
Level 1
Assets:
Total Assets	20,421	10,290
Level 1 | Deferred compensation plan assets
Assets:
Total Assets	20,421	10,290
Level 2
Assets:
Total Assets	122,206	113,260
Liabilities:
Total Liabilities	136,508	123,174
Level 2 | Foreign currency forward contracts
Assets:
Total Assets	82	1,646
Liabilities:
Total Liabilities	262	1,466
Level 2 | Interest rate swap contracts
Assets:
Total Assets	9,434	7,059
Level 2 | Deferred compensation plan assets
Assets:
Total Assets	112,690	104,555
Level 2 | Deferred compensation plan liabilities
Liabilities:
Total Liabilities	$ 136,246	$ 121,708

Fair Value Disclosures - Fair V

Fair Value Disclosures - Fair Value of Debt Instruments (Details) - Senior Notes - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	$ 2,182,804	$ 2,182,071
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	2,020,328	2,012,048
2028 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	794,384	794,088
2028 Notes | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	763,032	759,040
2029 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	595,009	594,794
2029 Notes | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	541,800	543,408
2030 Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Amount	793,411	793,189
2030 Notes | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 715,496	$ 709,600

Fair Value Disclosures - Narrat

Fair Value Disclosures - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss on impairment of lease related assets, net	$ 527	$ 8,720
Right-of-use assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss on impairment of lease related assets, net	400	6,300
Other long-lived assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss on impairment of lease related assets, net	$ 100	$ 2,400

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Lessee, Lease, Description [Line Items]
Renewal term	10 years
Option to terminate, term	1 year
Loss on impairment of lease related assets, net	$ 527	$ 8,720
Right-of-use assets
Lessee, Lease, Description [Line Items]
Loss on impairment of lease related assets, net	400	6,300
Leasehold Improvements
Lessee, Lease, Description [Line Items]
Loss on impairment of lease related assets, net	100	2,400
Selling, general and administrative
Lessee, Lease, Description [Line Items]
Loss on impairment of lease related assets, net	$ 500	$ 8,700

Leases - Net Lease Costs (Detai

Leases - Net Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Leases [Abstract]
Operating lease cost	$ 25,903	$ 28,799
Lease cost	5,631	4,720
Sublease income	(11,882)	(12,641)
Total lease cost, net	19,652	20,878
Cash paid for amounts included in the measurement of operating lease liabilities	34,049	34,948
Cash receipts from sublease arrangements	11,110	12,439
Right-of-use assets obtained in exchange for new operating lease liabilities	6,791	1,647
Cost for subleasing activities	$ 9,200	$ 10,600

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Accounts payable and accrued liabilities	$ 98,558	$ 98,493
Operating lease liabilities	491,182	513,406
Total operating lease liabilities included in the Condensed Consolidated Balance Sheets	$ 589,740	$ 611,899
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accounts payable and accrued liabilities	Accounts payable and accrued liabilities