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Fair Value Measurements (Details 2) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |
Contingent consideration impairment | $ 15.6 | $ 29.0 | $ 49.1 | $ 23.5
Fair Value, Measurements, Recurring |  |  |  |
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |
Fair value, beginning of period | 226.3 | 351.6 | 259.8 | 346.1
Fair value, end of period | $ 210.7 | $ 322.6 | $ 210.7 | $ 322.6

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