Goodwill and Intangible Assets (Components of Intangible Assets) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Intangible Assets by Major Class [Line Items]
IPR&D intangible asset impairment charges	$ 0.0	$ 0.0	$ 0.0	$ 29.5
Finite-lived intangible assets, original cost	20,088.2		20,088.2		$ 20,109.1
Finite-lived intangible assets, accumulated amortization	9,247.3		9,247.3		8,579.5
Finite-lived intangible assets, net book value	10,840.9		10,840.9		11,529.6
In-process research and development	115.0		115.0		120.3
Intangible assets, gross, excluding goodwill	20,203.2		20,203.2		20,229.4
Intangible assets, net book value, excluding goodwill	$ 10,955.9		$ 10,955.9		$ 11,649.9
Patents and technologies
Intangible Assets by Major Class [Line Items]
Finite-lived intangible assets, estimated useful life, in years			15 years		15 years