Cover page - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Feb. 11, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-39310
Entity Registrant Name	ZoomInfo Technologies Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	87-3037521
Entity Address, Address Line One	805 Broadway Street
Entity Address, Address Line Two	Suite 900
Entity Address, City or Town	Vancouver
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98660
City Area Code	800
Local Phone Number	914-1220
Title of 12(b) Security	Class A common stock, par value $0.01 per share
Trading Symbol	ZI
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 6,300.0
Entity Common Stock, Shares Outstanding		403,301,898
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement relating to the 2022 Annual Meeting of Stockholders of ZoomInfo Technologies Inc., which will be filed with the Securities and Exchange Commission within 120 days of December 31, 2021, are incorporated by reference in Item 10, Item 11, Item 12, Item 13 and Item 14 of Part III of this report.
Entity Central Index Key	0001794515
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY