Other Consolidated Financial Statement Detail (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Accrued Expenses and Other
Current portion of contingent consideration obligations and milestones	$ 570.5		$ 570.5		$ 504.7
Revenue-related reserves for discounts and allowances	538.4		538.4		662.7
Employee compensation and benefits	282.7		282.7		270.8
Royalties and licensing fees	209.0		209.0		167.9
Other	566.8		566.8		635.3
Total accrued expenses and other	2,012.0		2,012.0		2,096.8
Other Income (Expense), Net
Interest income	16.4	$ 5.4	43.0	$ 13.0
Interest expense	(66.0)	(15.6)	(195.2)	(28.1)
Gain (loss) on sales of investments, net	0.8	1.1	(0.3)	(0.3)
Foreign exchange gains (losses), net	(4.9)	(4.3)	(2.6)	(18.8)
Other, net	(4.4)	(2.0)	(14.3)	(7.1)
Other income (expense), net	(58.1)	$ (15.4)	(169.4)	$ (41.3)
Component of accrued expenses and other
Accrued Expenses and Other
Revenue-related reserves for discounts and allowances	$ 383.0		$ 383.0		$ 518.1