v3.20.2

Redeemable Series A Preferred Units (Tables) | 6 Months Ended
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Jun. 30, 2020
DiscoverOrg Holdings |
Equity, Class of Treasury Stock [Line Items] |
Debt Instrument Redemption Terms | The Company may, at its option, redeem the Series A Preferred Units in whole, or in part, at a price based on the redemption date as compared to January 31, 2021 (the “First Call Date”).
Applicable Period |  | Redemption Price
Prior to the First Call Date |  | Present value as of the redemption date of liquidation value as of First Call Date multiplied by 104%
On or after the First Call Date and prior to the first anniversary of the First Call Date |  | Liquidation value as of the redemption date multiplied by 104%
On or after the first anniversary of the First Call Date and prior to the second anniversary of the First Call Date |  | Liquidation value as of the redemption date multiplied by 102%
On or after the second anniversary of the First Call Date |  | Liquidation value as of the redemption date

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- Definition Tabular disclosure of debt instruments or arrangements with redemption features. Includes, but is not limited to, description of debt redemption features, percentage price at which debt can be redeemed by the issuer, and period start and end for debt maturity or redemption. + References No definition available. + Details
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Balance Type: | na
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | dei_LegalEntityAxis=zi_DiscoverOrgHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |