Goodwill and Intangible Assets (Components of Intangible Assets) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 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	20,738.7			20,738.7		$ 20,109.1
Finite-lived intangible assets, accumulated amortization	9,890.1			9,890.1		8,579.5
Finite-lived intangible assets, net book value	10,848.6			10,848.6		11,529.6
In-process research and development	117.2			117.2		120.3
Intangible assets, gross, excluding goodwill	20,855.9			20,855.9		20,229.4
Intangible assets, net book value, excluding goodwill	$ 10,965.8			$ 10,965.8		$ 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