Segmental Reporting (Revenue by Product) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue from External Customer [Line Items]
Product sales	$ 1,552.0	$ 1,171.0	$ 4,329.7	$ 3,477.1
VYVANSE
Revenue from External Customer [Line Items]
Product sales			1,065.6	897.9
ADDERALL XR
Revenue from External Customer [Line Items]
Product sales			280.2	293.5
INTUNIV
Revenue from External Customer [Line Items]
Product sales			279.0	248.9
LIALDA and MEZAVANT
Revenue from External Customer [Line Items]
Product sales			449.1	379.9
PENTASA
Revenue from External Customer [Line Items]
Product sales			213.8	215.2
FOSRENOL
Revenue from External Customer [Line Items]
Product sales			136.2	136.3
XAGRID
Revenue from External Customer [Line Items]
Product sales			82.1	74.1
Other Products
Revenue from External Customer [Line Items]
Product sales			97.6	96.4
REPLAGAL
Revenue from External Customer [Line Items]
Product sales			380.7	336.6
ELAPRASE
Revenue from External Customer [Line Items]
Product sales			449.5	392.6
VPRIV
Revenue from External Customer [Line Items]
Product sales			273.0	251.9
FIRAZYR
Revenue from External Customer [Line Items]
Product sales			262.3	153.8
CINRYZE
Revenue from External Customer [Line Items]
Product sales			$ 360.6	$ 0