CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues:
Net product sales	$ 445.5	$ 408.2	$ 1,260.6	$ 1,189.8
Total revenues	445.5	408.2	1,260.6	1,189.8
Operating expenses:
Cost of product sales	19.5	23.6	52.7	44.3
Research and development	55.0	45.9	151.0	80.7
Selling, general and administrative	47.2	100.1	171.0	177.3
Estimated loss contingency			210.0
Total operating expenses	121.7	169.6	584.7	302.3
Operating income	323.8	238.6	675.9	887.5
Other (expense) income:
Interest expense	(3.3)	(0.5)	(5.5)	(1.7)
Other, net	3.3	1.0	7.7	2.9
Impairment of cost method investment	(3.1)		(49.6)
Total other (expense) income, net	(3.1)	0.5	(47.4)	1.2
Income before income taxes	320.7	239.1	628.5	888.7
Income tax expense	(44.4)	(77.3)	(229.6)	(285.3)
Net income	$ 276.3	$ 161.8	$ 398.9	$ 603.4
Net income per common share:
Basic (in dollars per share)	$ 6.37	$ 3.75	$ 9.00	$ 13.62
Diluted (in dollars per share)	$ 6.27	$ 3.50	$ 8.83	$ 12.76
Weighted average number of common shares outstanding:
Basic (in shares)	43.4	43.2	44.3	44.3
Diluted (in shares)	44.1	46.2	45.2	47.3