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Fair Value Measurements (Details 2) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |
Contingent consideration impairment | $ (0.3) | $ (10.0) | $ 33.5 | $ (5.5)
Fair Value, Measurements, Recurring |  |  |  |
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |
Fair value, beginning of period | 226.0 | 341.6 | 259.8 | 346.1
Fair value, end of period | $ 226.3 | $ 351.6 | $ 226.3 | $ 351.6

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