Other Consolidated Financial Statement Detail (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Accrued Expenses and Other
Revenue-related reserves for discounts and allowances	$ 859.3		$ 761.6
Current portion of contingent consideration obligations and milestones	524.3		844.6
Royalties and licensing fees	194.6		206.7
Employee compensation and benefits	186.7		297.7
Construction Payable	178.2		159.7
Collaboration expenses accrual	176.4		183.7
Other	653.4		636.9
Total accrued expenses and other	2,571.1		2,901.3
Other Income (Expense), Net
Interest income	26.7	$ 16.7
Interest expense	(50.5)	(63.4)
Gain (loss) on sales of investments, net	(14.4)	2.4
Foreign exchange gains (losses), net	(1.0)	4.0
Other, net	(1.8)	2.3
Other income (expense), net	(41.0)	$ (38.0)
Component of accrued expenses and other
Accrued Expenses and Other
Revenue-related reserves for discounts and allowances	$ 657.5		$ 572.0