Cover Page |
Sep. 11, 2025 |
Sep. 10, 2025 |
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| Cover [Abstract] | ||
| Amendment Flag | false | |
| Entity Central Index Key | 0000749251 | |
| Entity Incorporation, State or Country Code | DE | |
| Document Type | 8-K | |
| Entity Registrant Name | GARTNER, INC. | |
| Entity File Number | 1-14443 | |
| 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 | 06902-7747 | |
| City Area Code | 203 | |
| Local Phone Number | 964-0096 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Entity Emerging Growth Company | false | |
| Title of 12(b) Security | Common Stock, $0.0005 par value per share | |
| Trading Symbol | IT | |
| Security Exchange Name | NYSE | |
| Document Period End Date | Sep. 10, 2025 |
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- Definition For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD. No definition available.
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- Definition The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'. No definition available.
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- Definition Two-character EDGAR code representing the state or country of incorporation. No definition available.
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- Definition The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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