v3.20.2

Goodwill and Acquired Intangible Assets - Intangible Assets (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Gross Carrying Amount | $ 437.1 |  | $ 437.1 |  |  |  |
Accumulated Amortization | (119.9) |  | (119.9) |  |  |  |
Net | 317.2 |  | 317.2 |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill | 966.8 |  | 966.8 |  | $ 966.8 |  |
Amortization of intangible assets | 10.3 | $ 12.0 | 20.5 | $ 21.3 |  |  |
DiscoverOrg Holdings |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Gross Carrying Amount |  |  |  |  | 437.1 | $ 145.6 |
Accumulated Amortization |  |  |  |  | (99.5) | (56.9) |
Net |  |  |  |  | 337.6 | 88.7 |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  |  | 966.8 | 445.7 | $ 439.7
Amortization of intangible assets |  |  |  |  | 42.6 | 14.7 |
Pre-Acquisition ZI brand portfolio |  |  |  |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Intangible assets not subject to amortization | 33.0 |  | 33.0 |  |  |  |
Pre-Acquisition ZI brand portfolio | DiscoverOrg Holdings |  |  |  |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Intangible assets not subject to amortization |  |  |  |  | 33.0 |  |
Customer relationships |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Gross Carrying Amount | 268.6 |  | 268.6 |  |  |  |
Accumulated Amortization | (43.5) |  | (43.5) |  |  |  |
Net | 225.1 |  | $ 225.1 |  |  |  |
Weighted Average Amortization Period |  |  | 15 years |  |  |  |
Customer relationships | DiscoverOrg Holdings |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Gross Carrying Amount |  |  |  |  | 268.6 | 95.6 |
Accumulated Amortization |  |  |  |  | (34.5) | (17.4) |
Net |  |  |  |  | $ 234.1 | $ 78.2 |
Weighted Average Amortization Period |  |  |  |  | 15 years | 14 years 10 months 24 days |
Acquired technology |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Gross Carrying Amount | 163.9 |  | $ 163.9 |  |  |  |
Accumulated Amortization | (73.7) |  | (73.7) |  |  |  |
Net | 90.2 |  | $ 90.2 |  |  |  |
Weighted Average Amortization Period |  |  | 6 years |  |  |  |
Acquired technology | DiscoverOrg Holdings |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Gross Carrying Amount |  |  |  |  | $ 163.9 | $ 45.4 |
Accumulated Amortization |  |  |  |  | (62.5) | (37.5) |
Net |  |  |  |  | $ 101.4 | $ 7.9 |
Weighted Average Amortization Period |  |  |  |  | 6 years | 3 years 10 months 24 days |
Brand portfolio |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Gross Carrying Amount | 4.6 |  | $ 4.6 |  |  |  |
Accumulated Amortization | (2.7) |  | (2.7) |  |  |  |
Net | $ 1.9 |  | $ 1.9 |  |  |  |
Weighted Average Amortization Period |  |  | 9 years 8 months 12 days |  |  |  |
Brand portfolio | DiscoverOrg Holdings |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Gross Carrying Amount |  |  |  |  | $ 4.6 | $ 4.6 |
Accumulated Amortization |  |  |  |  | (2.5) | (2.0) |
Net |  |  |  |  | $ 2.1 | $ 2.6 |
Weighted Average Amortization Period |  |  |  |  | 9 years 8 months 12 days | 9 years 8 months 12 days |

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