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Collaborative Arrangements and Licensing Agreements (Tables) | 3 Months Ended
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Mar. 31, 2019
Biogen [Member] |
Collaborative Arrangements and Licensing Agreements [Abstract] |
Revenue from Collaborative Relationship | During the three months ended March 31, 2019 and 2018, we earned the following revenue from our relationship with Biogen (in millions, except percentage amounts):
|  | Three Months Ended March 31, |
|  | 2019 |  |  | 2018 |
SPINRAZA royalties (commercial revenue) |  | $ | 59.7 |  |  | $ | 41.1 |
R&D revenue |  |  | 24.5 |  |  |  | 10.8 |
Total revenue from our relationship with Biogen |  | $ | 84.2 |  |  | $ | 51.9 |
Percentage of total revenue |  |  | 28 | % |  |  | 36 | %
Roche [Member] |
Collaborative Arrangements and Licensing Agreements [Abstract] |
Revenue from Collaborative Relationship | During the three months ended March 31, 2019 and 2018, we earned the following revenue from our relationship with Roche (in millions, except percentage amounts):
|  | Three Months Ended March 31, |
|  | 2019 |  |  | 2018 |
R&D revenue |  | $ | 41.2 |  |  | $ | 2.0 |
Percentage of total revenue |  |  | 14 | % |  |  | 1 | %
Novartis [Member] |
Collaborative Arrangements and Licensing Agreements [Abstract] |
Revenue from Collaborative Relationship | During the three months ended March 31, 2019 and 2018, we earned the following revenue from our relationship with Novartis (in millions, except percentage amounts):
|  | Three Months Ended March 31, |
|  | 2019 |  |  | 2018 |
R&D revenue |  | $ | 157.1 |  |  | $ | 17.1 |
Percentage of total revenue |  |  | 53 | % |  |  | 12 | %

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