Collaborative Arrangements and Licensing Agreements (Tables)

9 Months Ended

Sep. 30, 2021

Biogen [Member]

Collaborative Arrangements and Licensing Agreements [Abstract]

Revenue from Collaborative Relationship

During the three and nine months ended September 30, 2021 and 2020, we earned the following revenue from our relationship with Biogen (in millions, except percentage amounts):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2021			2020			2021			2020
SPINRAZA royalties (commercial revenue)	$	66.6		$	74.2		$	198.7		$	211.9
R&D revenue		17.4			51.2			63.4			98.6
Total revenue from our relationship with Biogen	$	84.0		$	125.4		$	262.1		$	310.5
Percentage of total revenue		63	%		78	%		71	%		71	%