Product Sales (Tables)

3 Months Ended

Mar. 31, 2020

Revenues [Abstract]

Schedule of product sales

Net product sales consist of the following:

	Three Months Ended March 31,
Net Product Sales in the United States	2020		2019
EYLEA®	$	1,172.0	$	1,074.1
Libtayo®	61.7		26.8
ARCALYST®	3.0		3.5
	$	1,236.7	$	1,104.4

Schedules of Concentration of Risk, by Risk Factor

Sales to each of these customers as a percentage of the Company's total gross product revenue are as follows:

	Three Months Ended March 31,
	2020		2019
Besse Medical, a subsidiary of AmerisourceBergen Corporation	54	%	59	%
McKesson Corporation	36	%	31	%