Collaboration, License, Co-Promotion and Other Commercial Agreements - European Territory (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2017	Oct. 31, 2015
Almirall
Collaboration, License and Co-Promotion Agreements
Annual royalty	5 years
Almirall S A and Allergan Plc \| Europe \| Product related collaborative arrangements
Collaboration, License and Co-Promotion Agreements
Remaining milestone payment due upon the amendment to the license agreement		$ 42.5

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