CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenue:
Net product sales	$ 1,429.3	$ 1,245.5
Collaborative agreements and other revenue	7.1	2.6
Royalty revenue	28.2	25.2
Total revenue	1,464.6	1,273.3
Expenses:
Cost of goods sold (excluding amortization of acquired intangible assets)	80.5	72.5
Research and development	452.4	362.0
Selling, general and administrative	369.0	325.8
Amortization of acquired intangible assets	65.7	41.8
Acquisition related (gains) charges and restructuring, net	33.2	(11.1)
Total costs and expenses	1,000.8	791.0
Operating income	463.8	482.3
Other income and (expense):
Interest and investment income, net	4.8	3.7
Interest (expense)	(17.9)	(11.4)
Other income (expense), net	(2.3)	(0.6)
Income before income taxes	448.4	474.0
Income tax provision	63.5	72.5
Net income	$ 384.9	$ 401.5
Net income per common share:
Basic (in dollars per share)	$ 0.92	$ 0.92
Diluted (in dollars per share)	$ 0.89	$ 0.90
Weighted average shares:
Basic (in shares)	417.9	438.3
Diluted (in shares)	432.2	448.6