Collaborative Arrangements and Acquisitions - BioAxone Biosciences, Inc. (Details) - BioAxone Biosciences Inc. - USD ($)	1 Months Ended	3 Months Ended
	Oct. 31, 2014	Dec. 31, 2014
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaborative arrangement, up-front payment		$ 10,000,000
Maximum license fees and milestone payments	$ 90,000,000.0
In-process research and development intangible asset	29,000,000
Deferred tax liability attributable to variable interest entity	$ 11,300,000
Purchase option, term of extension of expiration date (in years)	1 year