Segmental Reporting (Revenue by Product) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenue from External Customer [Line Items]
Product sales	$ 1,469.6	$ 1,207.9	$ 2,777.7	$ 2,306.1
VYVANSE
Revenue from External Customer [Line Items]
Product sales			710.7	598.7
ADDERALL XR
Revenue from External Customer [Line Items]
Product sales			184.9	212.1
INTUNIV
Revenue from External Customer [Line Items]
Product sales			182.3	168.1
LIALDA and MEZAVANT
Revenue from External Customer [Line Items]
Product sales			272.5	238.0
PENTASA
Revenue from External Customer [Line Items]
Product sales			135.5	144.6
FOSRENOL
Revenue from External Customer [Line Items]
Product sales			88.1	84.4
XAGRID
Revenue from External Customer [Line Items]
Product sales			55.0	49.9
Other Products
Revenue from External Customer [Line Items]
Product sales			67.2	63.4
REPLAGAL
Revenue from External Customer [Line Items]
Product sales			244.8	228.1
ELAPRASE
Revenue from External Customer [Line Items]
Product sales			280.7	263.5
VPRIV
Revenue from External Customer [Line Items]
Product sales			176.6	164.1
FIRAZYR
Revenue from External Customer [Line Items]
Product sales			163.9	91.2
CINRYZE
Revenue from External Customer [Line Items]
Product sales			$ 215.5	$ 0