Collaborative Arrangements - Cystic Fibrosis Foundation Therapeutics Incorporated (Details) - Cystic Fibrosis Foundation Therapeutics Incorporated |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
USD ($)
| |
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |
| Collaborative funding | $ 75,000,000.0 |
| Additional collaborative funding | $ 6,000,000.0 |