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Fair Value Measurements (Details 2) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |
Contingent consideration impairment | $ (10.0) | $ 20.0 | $ (5.5) | $ 8.5
Payments | 0.0 | 0.0 | 0.0 | 0.0
Fair Value, Measurements, Recurring |  |  |  |
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |
Fair value, beginning of period | 341.6 | 421.3 | 346.1 | 409.8
Fair value, end of period | $ 351.6 | $ 401.3 | $ 351.6 | $ 401.3

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