Other Intangible Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Intangible Assets (Excluding Goodwill) [Line Items]
Amortized intangible assets	$ 10,307.2		$ 9,746.9
Other intangible assets, gross	15,769.2		11,108.9
Less: Accumulated amortization	(2,053.6)		(1,935.6)
Other intangible assets, net	13,715.6	$ 9,980.0	9,173.3	$ 4,934.4
Other Disclosures
Acquisitions	4,660.9	5,198.0
Change in fair value of contingent consideration	(11.4)	(2.4)
Amortization of intangible assets	134.6	88.3
Selling, General and Administrative
Other Disclosures
Amortization of intangible assets	134.6	$ 88.3
Acquired intellectual property ("IP") rights for marketed products
Intangible Assets (Excluding Goodwill) [Line Items]
Amortized intangible assets	9,507.2		9,371.9
Less: Accumulated amortization	(1,938.6)		(1,852.1)
Other Disclosures
Acquisitions	135.0
Other intangible assets
Intangible Assets (Excluding Goodwill) [Line Items]
Amortized intangible assets	800.0		375.0
Less: Accumulated amortization	(115.0)		(83.5)
Other Disclosures
Acquisitions	425.0
Acquired IP rights for in-process research and development ("IPR&D")
Intangible Assets (Excluding Goodwill) [Line Items]
Unamortized intangible assets	5,462.0		$ 1,362.0
Other Disclosures
Acquisitions	$ 4,100.0