Other Consolidated Financial Statement Detail (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue-related rebates	$ 468,600,000	$ 416,300,000	$ 237,100,000	$ 155,600,000
Cash Paid During the Year
Interest	41,200,000	53,600,000	65,400,000
Income taxes	1,163,200,000	643,200,000	526,600,000
Other Nonoperating Income (Expense) [Abstract]
Interest income	12,200,000	8,200,000	29,500,000
Interest expense	29,500,000	31,900,000	36,500,000
Impairment on investments	0	2,800,000	5,500,000
Gain (loss) on investments, net	11,800,000	21,700,000	10,600,000
Foreign exchange gains (losses), net	(11,600,000)	(15,200,000)	(2,500,000)
Other, net	(8,700,000)	(14,900,000)	3,700,000
Total other income (expense), net	(25,781,000)	(34,930,000)	(744,000)
Accrued Liabilities, Current [Abstract]
Employee compensation and benefits	393,800,000	343,400,000
Current portion of contingent consideration obligations	265,500,000	54,000,000
Royalties and licensing fees	172,400,000	160,700,000
Deferred revenue	120,900,000	172,700,000
Clinical development expenses	65,900,000	55,200,000
Other	456,800,000	304,300,000
Accrued expenses and other	1,819,334,000	1,355,187,000
Other Long-Term Liabilities
Employee compensation and benefits	200,700,000	161,500,000
Contingent consideration obligations	200,000,000	251,900,000
Taxes payable	142,200,000	177,100,000
Other	107,200,000	68,700,000
Total other long-term liabilities	650,096,000	659,231,000
Component of accrued expenses and other
Revenue-related rebates	$ 344,000,000	$ 264,900,000