Intangible Assets (Summary of Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross acquired intangible assets	$ 37,806.3	$ 11,108.9
Accumulated amortization	(3,108.8)	(1,935.6)
Intangible assets, net	34,697.5	9,173.3	$ 4,934.4
Currently marketed products
Finite-Lived Intangible Assets [Line Items]
Gross acquired intangible assets	31,217.5	9,371.9
Accumulated amortization	(2,908.6)	(1,852.1)
Intangible assets, net	28,308.9	7,519.8
IPR&D
Finite-Lived Intangible Assets [Line Items]
Gross acquired intangible assets	5,746.6	1,362.0
Accumulated amortization	0.0	0.0
Intangible assets, net	5,746.6	1,362.0
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross acquired intangible assets	842.2	375.0
Accumulated amortization	(200.2)	(83.5)
Intangible assets, net	$ 642.0	$ 291.5