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Acquisitions - Adapt Narrative (Details) $ / shares in Units, $ in Millions |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 15, 2018 USD ($) employee $ / shares shares | Jun. 30, 2019 USD ($) | Dec. 31, 2018 USD ($)
Business Acquisition [Line Items] |  |  |
Contingent consideration |  | $ 10.4 | $ 54.4
Goodwill |  | 268.3 | $ 259.7
Adapt Pharma |  |  |
Business Acquisition [Line Items] |  |  |
Number of employees | employee | 50 |  |
Common stock issued for acquisition (in shares) | shares | 733,309 |  |
Share price (in dollars per share) | $ / shares | $ 60.44 |  |
Consideration transferred, equity interests issued and issuable | $ 44.3 |  |
Equity | $ 37.7 |  |
Lock-up period for adjustment of fair value | 2 years |  |
Fair value of contingent purchase consideration |  | $ 48.0 |
Acquired intangible asset | $ 534.0 |  |
Amortization period of intangible asset | 15 years |  |
Present value, discount rate | 10.50% |  |
Acquired in-process research and development | $ 41.0 |  |
Goodwill | 148.0 |  |
Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Amortization period of intangible asset |  | 22 years | 22 years
Maximum | Adapt Pharma |  |  |
Business Acquisition [Line Items] |  |  |
Contingent consideration | $ 100.0 |  |
IPR&D | Adapt Pharma |  |  |
Business Acquisition [Line Items] |  |  |
Present value, discount rate | 11.00% |  |
Previously Reported | Adapt Pharma |  |  |
Business Acquisition [Line Items] |  |  |
Acquired intangible asset | $ 534.0 |  |
Goodwill | 149.0 |  |
Previously Reported | IPR&D | Adapt Pharma |  |  |
Business Acquisition [Line Items] |  |  |
Acquired in-process research and development | $ 41.0 |  |

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