Goodwill and Other Intangibles (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets, Gross	$ 5,300.9	$ 5,237.4
Impairment of Intangible Assets, Finite-lived	0	0	0
Goodwill, Impairment Loss	0	0	0
Goodwill	1,516.8	1,501.3
Indefinite-Lived Intangible Assets (Excluding Goodwill)		65.0
Indefinite-Lived Intangible Assets, Gross	1,550.4	1,566.3
Finite-Lived Intangible Assets, Accumulated Amortization	2,520.2	2,051.0
Finite-Lived Intangible Assets, Net	2,780.7	3,186.4
Finite-Lived Intangible Assets, Weighted-Average Useful Life	8 years
Finite-Lived Intangible Assets, Amortization Expense	555.0	563.0	469.0
Future Amortization Expense, Year One	530
Future Amortization Expense, Year Two	490
Future Amortization Expense, Year Three	380
Future Amortization Expense, Year Four	200
Future Amortization Expense, Year Five	180
Impairment charges, indefinite lived intangibles	0	205.0	151.5
In-process Research and Development [Member]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	33.6
Human Pharmaceutical Products [Member]
Goodwill	1,354.7	1,364.2
Animal Health Products [Member]
Goodwill	162.1	137.1
Developed Technology Rights [Member]
Finite-Lived Intangible Assets, Gross	5,136.1	5,107.9
Finite-Lived Intangible Assets, Accumulated Amortization	2,447.2	1,987.0
Finite-Lived Intangible Assets, Net	2,688.9	3,120.9
Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Gross	164.8	129.5
Finite-Lived Intangible Assets, Accumulated Amortization	73.0	64.0
Finite-Lived Intangible Assets, Net	$ 91.8	$ 65.5