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Acquisitions - Net Assets Acquired (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 14, 2021 | Jun. 03, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | --- | ---
Business Combination Segment Allocation [Line Items] |  |  |  |  |
Goodwill | $ 315.0 |  |  | $ 108.6 | $ 110.4
Unify Square, Inc. |  |  |  |  |
Business Combination Segment Allocation [Line Items] |  |  |  |  |
Receivables |  |  | $ 3.4 |  |
Prepaid expenses and other current assets |  |  | 0.6 |  |
Properties and other long-term assets |  |  | 0.4 |  |
Operating lease right-of-use assets |  |  | 1.7 |  |
Accounts payable and accruals |  |  | (3.8) |  |
Deferred revenue |  |  | (2.7) |  |
Long-term operating lease liabilities |  |  | (1.7) |  |
Intangible assets |  |  | 19.6 |  |
Goodwill |  |  | 132.9 |  |
Total |  |  | $ 150.4 |  |
CompuGain |  |  |  |  |
Business Combination Segment Allocation [Line Items] |  |  |  |  |
Receivables |  | $ 7.8 |  |  |
Prepaid expenses and other current assets |  | 0.7 |  |  |
Properties and other long-term assets |  | 0.2 |  |  |
Operating lease right-of-use assets |  | 0.2 |  |  |
Accounts payable and accruals |  | (5.6) |  |  |
Long-term operating lease liabilities |  | (0.1) |  |  |
Intangible assets |  | 18.3 |  |  |
Goodwill |  | 65.5 |  |  |
Total |  | $ 87.0 |  |  |

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