v3.20.2
Goodwill and Acquired Intangible Assets - Future Amortization Expense (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]      
Net $ 317.2    
DiscoverOrg Holdings      
Acquired Finite-Lived Intangible Assets [Line Items]      
2019   $ 40.8 $ 12.3
2020   40.8 7.5
2021   40.7 7.5
2022   30.4 7.5
2023   28.9 7.4
Thereafter     46.5
Net   $ 337.6 $ 88.7