Other Intangible Assets, Net (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Intangible Assets (Excluding Goodwill) [Line Items]
Amortized intangible assets	$ 3,201.1	$ 3,216.5
Other intangible assets, gross	3,758.1	3,447.5
Less: Accumulated amortization	(1,100.9)	(1,059.4)
Other intangible assets, net	2,657.2	2,388.1	2,489.0	2,493.0
Estimates of Annual Amortization
2014	198.0
2015	198.0
2016	198.0
2017	198.0
2018	198.0
Currently Marketed Products
Intangible Assets (Excluding Goodwill) [Line Items]
Amortized intangible assets	2,446.7	2,462.0
Acquired Product Technology
Intangible Assets (Excluding Goodwill) [Line Items]
Amortized intangible assets	710.0	710.0
Other Intangible Assets
Intangible Assets (Excluding Goodwill) [Line Items]
Amortized intangible assets	44.4	44.5
IPR&D
Intangible Assets (Excluding Goodwill) [Line Items]
Unamortized intangible assets	557.0	231.0
Specialty Pharmaceuticals
Intangible Assets (Excluding Goodwill) [Line Items]
Other intangible assets, net	1,209.5	1,238.0
Human Genetic Therapies
Intangible Assets (Excluding Goodwill) [Line Items]
Other intangible assets, net	782.4	474.6
Regenerative Medicine
Intangible Assets (Excluding Goodwill) [Line Items]
Other intangible assets, net	$ 665.3	$ 675.5