Condensed 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
Net product sales	$ 859	$ 798	$ 2,640	$ 2,251
Other revenue	0	1	1	2
Total revenues	859	799	2,641	2,253
Cost of sales	157	71	310	190
Operating expenses:
Research and development	195	195	613	551
Selling, general and administrative	271	230	798	695
Amortization of purchased intangible assets	80	82	240	242
Change in fair value of contingent consideration	4	41	32	31
Acquisition-related costs	0	0	0	2
Restructuring expenses	72	1	99	2
Impairment of intangible assets	0	0	31	0
Total operating expenses	622	549	1,813	1,523
Operating income	80	179	518	540
Other income and expense:
Investment income	5	5	13	8
Interest expense	(25)	(24)	(73)	(72)
Other expense	(2)	(1)	0	(4)
Income before income taxes	58	159	458	472
Income tax (benefit) expense	(20)	65	45	166
Net income	$ 78	$ 94	$ 413	$ 306
Earnings per common share
Basic	$ 0.35	$ 0.42	$ 1.84	$ 1.37
Diluted	$ 0.35	$ 0.42	$ 1.83	$ 1.35
Shares used in computing earnings per common share
Basic	223	224	224	224
Diluted	225	226	226	226