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Collaborative and Other Arrangements (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2018 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Transitional Service Agreement Set-up Costs | $ 22.0
Fee Cap - First Twelve Months | 62.5
Fee Cap Six months subsequent to first twelve months | $ 31.3

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