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Divestitures - Narrative (Details) - Discontinued Operations, Disposed of by Sale - MyCase - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2021
Business Acquisition [Line Items] |  |  |
Consideration for disposal of subsidiary | $ 193.0 |  |
Proceeds from divestiture of subsidiary | 192.2 |  |
Employee retention bonus pool | 2.2 |  |
Cash divested | 0.8 |  |
Working capital adjustment | $ 0.6 |  |
Retention period | 1 year |  |
Gain on sale of subsidiary | $ 188.0 |  |
Assets divested | 4.6 |  |
Adjustment to the employee retention bonus pool | 0.4 |  |
Capitalized software divested | 3.9 |  |
Deferred revenue divested | 2.8 |  |
Goodwill divested | $ 2.3 |  |
Income received |  | $ 0.3 | $ 0.7

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