Acquisitions and Divestiture	12 Months Ended
Acquisitions and Divestiture	Dec. 31, 2023
Business Combination and Asset Acquisition [Abstract]
Acquisitions and Divestiture	Acquisitions and Divestiture Acquisitions Year Ended December 31, 2023 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. The allocation of the purchase price is preliminary with respect to certain tax matters. Year Ended December 31, 2022 In October 2022, the Company acquired 100% of the outstanding capital stock of UpCity, Inc. (“UpCity”), a privately-held company based in Chicago, Illinois, for an aggregate purchase price of $6.4 million. UpCity’s online marketplace helps small businesses by connecting them to ratings and reviews of more than 50,000 B2B service providers. Year Ended December 31, 2021 In June 2021, the Company acquired 100% of the outstanding capital stock of Pulse Q&A Inc. (“Pulse”), a privately-held company based in San Francisco, California, for an aggregate purchase price of $29.9 million. Pulse is a technology-enabled community platform. During 2021, the Company paid $22.9 million in cash for Pulse after considering the cash acquired with the business, amounts held in escrow and certain other purchase price adjustments. During the year ended December 31, 2022, the Company paid $4.1 million of deferred consideration held in escrow. In addition to the purchase price, the Company may also be required to pay up to $4.5 million in cash based on the continuing employment of certain key employees. Such amounts are recognized as compensation expense over three years post-acquisition and reported in Acquisition and integration charges in the Consolidated Statements of Operations. The Company recorded $31.0 million of goodwill and finite-lived intangible assets and $1.1 million of liabilities on a net basis for the Pulse acquisition. Divestiture In February 2023, the Company completed the sale of a non-core business, TalentNeuron, for approximately $161.1 million after consideration of post-close adjustments. The Company recorded a pre-tax gain of $135.4 million on the sale of TalentNeuron, which is included in Gain from sale of divested operation in the Consolidated Statement of Operations for the year ended December 31, 2023. TalentNeuron was included in the Company’s Research segment. The principal components of the assets divested included goodwill, intangible assets, net, property, equipment and leasehold improvements, net, and accounts receivable, with carrying amounts of $16.0 million, $9.5 million, $4.5 million and $11.8 million, respectively, while the liabilities transferred with the sale primarily consisted of deferred revenue with a carrying amount of $24.4 million. Such assets and liabilities were included in Assets held-for-sale and Liabilities held-for-sale, respectively, on the Consolidated Balance Sheet at December 31, 2022 at their respective carrying values at that date. Acquisition and Integration Charges The Company recognized $9.6 million, $9.1 million and $6.1 million of Acquisition and integration charges during 2023, 2022 and 2021, respectively. Acquisition and integration charges reflect additional costs and expenses resulting from the Company’s acquisitions and divestitures and include, among other items, professional fees and personnel related expenses. During 2021, the Company received $2.3 million cash proceeds from deferred consideration related to a 2018 divestiture.