Goodwill and Other Intangibles (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets, Gross	$ 5,833.6	$ 5,300.9
Impairment of Intangible Assets, Finite-lived	0
Goodwill, Impairment Loss	0
Goodwill	1,758.1	1,516.8
Finite-Lived Intangible Assets, Accumulated Amortization	2,960.8	2,520.2
Finite-Lived Intangible Assets, Net	2,872.8	2,780.7
Finite-Lived Intangible Assets, Weighted-Average Useful Life	10 years
Amortization of Intangible Assets	535.9	555.0	563.0
Future Amortization Expense, Year One	465
Future Amortization Expense, Year Two	360
Future Amortization Expense, Year Three	325
Future Amortization Expense, Year Four	215
Future Amortization Expense, Year Five	185
Impairment charges, indefinite lived intangibles	0	0	205.0
Indefinite-Lived Intangible Assets, Gross	1,769.5	1,550.4
In-process Research and Development [Member]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	11.4	33.6
Human Pharmaceutical Products [Member]
Goodwill	1,354.3	1,354.7
Animal Health Products [Member]
Goodwill	403.8	162.1
Developed Technology Rights [Member]
Finite-Lived Intangible Assets, Gross	5,684.3	5,136.1
Finite-Lived Intangible Assets, Accumulated Amortization	2,915.6	2,447.2
Finite-Lived Intangible Assets, Net	2,768.7	2,688.9
Other Intangible Assets [Member]
Finite-Lived Intangible Assets, Gross	149.3	164.8
Finite-Lived Intangible Assets, Accumulated Amortization	45.2	73.0
Finite-Lived Intangible Assets, Net	$ 104.1	$ 91.8