Employee Retirement Benefits (Details) - DiscoverOrg Holdings - USD ($) $ in Millions |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
Jun. 30, 2020 |
Jun. 30, 2018 |
Dec. 31, 2019 |
|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
| Company match of employee contribution (as a percent) | 35.00% | ||
| Matching contributions | $ 0.6 | $ 1.4 | |
| Vesting term for matching contributions | 3 years | ||