Collaborative Arrangements - Moderna Therapeutics, Inc. (Details) - Moderna Therapeutics, Inc. - USD ($)	1 Months Ended		3 Months Ended
	Aug. 31, 2016	Jul. 31, 2016	Sep. 30, 2016
Schedule of Collaborative Arrangement Agreements [Line Items]
Collaborative arrangement, up-front payment		$ 20,000,000	$ 20,000,000.0
Collaborative arrangement, investment in collaborative partner, pursuant to convertible loan agreement	$ 20,000,000
Collaborative arrangement development and regulatory potential milestone payments maximum		275,000,000.0
Collaborative arrangement approval and reimbursement milestones		$ 220,000,000.0