v3.20.2

Business Combinations - Narrative (Details) customer in Thousands, $ in Millions |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended | 16 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 09, 2019 USD ($) | Feb. 01, 2019 USD ($) customer | Jun. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) | Feb. 01, 2021 USD ($) | Jan. 31, 2019 USD ($) | Sep. 30, 2018 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Unearned revenue |  |  | $ 172.1 | $ 172.1 | $ 159.1 |  | $ 159.1 |  |  |
DiscoverOrg Holdings |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Unearned revenue |  |  |  |  | 159.1 | $ 52.5 | 159.1 |  |  |
Pre-Acquisition ZI |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Unearned revenue |  |  |  |  |  |  |  |  | $ 68.3 |
Komiko |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Value of consideration transferred | $ 8.5 |  |  |  |  |  |  |  |  |
Potential contingent payments | $ 4.0 |  |  |  |  |  |  |  |  |
Contingent payments attributable to purchase consideration (as a percent) | 40.00% |  |  |  |  |  |  |  |  |
Additional liability recognized relating to contingent payments |  |  | 0.7 | 1.7 |  |  |  |  |  |
Fair value of acquired unearned revenue | $ 0.2 |  |  |  |  |  |  |  |  |
Komiko | DiscoverOrg Holdings |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Value of consideration transferred | 8.5 |  |  |  |  |  |  |  |  |
Potential contingent payments |  |  |  |  | $ 4.0 |  | $ 4.0 |  |  |
Contingent payments attributable to purchase consideration (as a percent) |  |  |  |  | 40.00% |  | 40.00% |  |  |
Fair value of acquired unearned revenue | 0.2 |  |  |  |  |  |  |  |  |
Komiko | Developed technology |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Identifiable finite-lived intangible assets | $ 2.4 |  |  |  |  |  |  |  |  |
Estimated useful life | 7 years |  |  |  |  |  |  |  |  |
Komiko | Developed technology | DiscoverOrg Holdings |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Identifiable finite-lived intangible assets | $ 2.4 |  |  |  |  |  |  |  |  |
Estimated useful life | 7 years |  |  |  |  |  |  |  |  |
Pre-Acquisition ZI |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Value of consideration transferred |  | $ 760.1 |  |  |  |  |  |  |  |
Ownership acquired (as a percent) |  | 100.00% |  |  |  |  |  |  |  |
Number of customers served (over) | customer |  | 8 |  |  |  |  |  |  |  |
Transaction costs incurred |  | $ 2.7 |  |  |  |  |  |  |  |
Cash acquired |  | 12.1 |  |  |  |  |  |  |  |
Deferred consideration, current |  | 25.0 |  |  |  |  |  |  |  |
Fair value of acquired unearned revenue |  | 34.5 |  |  |  |  |  |  |  |
Cash, cash equivalents, and restricted cash |  | 12.1 |  |  |  |  |  |  |  |
Pre-Acquisition ZI | Accrued expense and other current liabilities |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred consideration, current |  |  | 9.8 | 9.8 |  |  |  |  |  |
Pre-Acquisition ZI | DiscoverOrg Holdings |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Value of consideration transferred |  | $ 760.1 |  |  |  |  |  |  |  |
Ownership acquired (as a percent) |  | 100.00% |  |  |  |  |  |  |  |
Number of customers served (over) | customer |  | 8 |  |  |  |  |  |  |  |
Transaction costs incurred |  | $ 2.7 |  |  |  |  |  |  |  |
Cash acquired |  | 12.1 |  |  |  |  |  |  |  |
Deferred consideration, current |  | 25.0 |  |  |  |  |  |  |  |
Fair value of acquired unearned revenue |  | 34.5 |  |  |  |  |  |  |  |
Fair value adjustment of acquired deferred revenue |  | $ 33.8 |  |  |  |  |  |  |  |
Period to recognize acquired deferred revenue |  | 1 year |  |  |  |  |  |  |  |
Pro forma transaction costs and bonuses |  |  |  |  |  | $ 9.2 |  |  |  |
Cash, cash equivalents, and restricted cash |  | $ 12.1 |  |  |  |  |  |  |  |
Pre-Acquisition ZI | Cash Vesting Payment Program |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Potential value of future payments |  |  | 7.1 | 7.1 |  |  |  |  |  |
Contingent consideration expense |  |  | 1.5 | 4.0 |  |  |  |  |  |
Pre-Acquisition ZI | Cash Vesting Payment Program | DiscoverOrg Holdings |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Potential value of future payments |  | $ 23.1 |  |  |  |  |  |  |  |
Contingent consideration expense |  |  |  |  | $ 8.8 |  |  |  |  |
Pre-Acquisition ZI | Forecast |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred consideration, noncurrent |  |  |  |  |  |  |  | $ 10.0 |  |
Pre-Acquisition ZI | Forecast | DiscoverOrg Holdings |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred consideration, noncurrent |  |  |  |  |  |  |  | $ 10.0 |  |
Pre-Acquisition ZI | Developed technology |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful life |  | 5 years 9 months 18 days |  |  |  |  |  |  |  |
Pre-Acquisition ZI | Developed technology | DiscoverOrg Holdings |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Estimated useful life |  | 5 years 9 months 18 days |  |  |  |  |  |  |  |
NeverBounce |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Potential contingent payments |  |  | $ 1.6 | $ 1.6 |  |  |  |  |  |
NeverBounce | DiscoverOrg Holdings |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Value of consideration transferred |  |  |  |  | 9.6 |  |  |  |  |
Potential contingent payments |  |  |  |  | 1.6 |  | $ 1.6 |  |  | $ 2.0
Transaction costs incurred |  |  |  |  | 0.1 |  | 0.1 |  |  |
Fair value of acquired unearned revenue |  |  |  |  | 0.1 |  | 0.1 |  |  |
Contingent consideration paid |  |  |  |  |  |  | 0.4 |  |  |
NeverBounce | Developed technology | DiscoverOrg Holdings |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Identifiable finite-lived intangible assets |  |  |  |  | $ 2.3 |  | $ 2.3 |  |  |
Estimated useful life |  |  |  |  | 7 years |  |  |  |  |

X
- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition. + References No definition available. + Details
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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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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477 + Details
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- Definition This element represents the amount of any change recognized during the period in the high-end of the estimated range of outcomes (undiscounted) of a liability assumed in a business combination arising from an item of contingent consideration. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e7008-128479 + Details
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- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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- Definition Amount of deferred revenue expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=121600890&loc=d3e2207-128464 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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- Definition The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044 + Details
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- Definition Amount of cash outflow, made soon after acquisition date of business combination, to settle contingent consideration liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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