Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues:
Product sales	$ 1,627.3	$ 1,423.2
Royalties	79.2	62.8
Other revenues	2.8	2.4
Total revenues	1,709.3	1,488.4
Costs and expenses:
Cost of product sales	248.6	227.8
Research and development ("R&D")	217.1	193.7
Selling, general and administrative ("SG&A")	609.5	506.6
Gain on sale of product rights	(4.2)	(5.2)
Reorganization costs	3.3	15.2
Integration and acquisition costs	91.1	75.7
Total operating expenses	1,165.4	1,013.8
Operating income from continuing operations	543.9	474.6
Interest income	1.0	2.0
Interest expense	(44.7)	(9.6)
Other (expense)/income, net	(8.5)	4.3
Total other expense,net	(52.2)	(3.3)
Income from continuing operations before income taxes and equity in losses of equity method investees	491.7	471.3
Income taxes	(82.1)	(57.4)
Equity in losses of equity method investees, net of taxes	(0.1)	(1.0)
Income from continuing operations, net of taxes	409.5	412.9
Gain/(loss) from discontinued operations, net of taxes (in USD)	9.5	(2.5)
Net income	$ 419.0	$ 410.4
Earnings Per Share, Basic [Abstract]
Earnings from continuing operations (in USD per share)	$ 0.69	$ 0.70
Gain/(loss) from discontinued operations (in USD per share)	0.02	0
Earnings per ordinary share - basic (in USD per share)	0.71	0.70
Earnings Per Share, Diluted [Abstract]
Earnings from continuing operations (in USD per share)	0.69	0.69
Gain/(loss) from discontinued operations (in USD per share)	0.02	0
Earnings per ordinary share - diluted (in USD per share)	$ 0.71	$ 0.69
Weighted average number of shares:
Basic (in shares)	591.7	589.1
Diluted (in shares)	593.3	592.7