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v3.19.2

Contingent Consideration (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2019 USD ($)
Unobservable Input Reconciliation [Roll Forward] |
Balance, beginning of period | $ 60.0
Milestone achievement - asset acquisition | 10.0
Measurement period adjustment | 1.5
Change in fair value | 5.5
Settlements | (12.0)
Balance, end of period | 65.0
Raxibacumab |
Business Acquisition [Line Items] |
Contingent consideration liability increase | $ 10.0

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