Goodwill and Other Intangibles (Schedule of Finite-lived and Indefinite-lived Intangible Assets other than Goodwill) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Finite-lived intangible assets:
Carrying Amount, Gross	$ 8,076.8	$ 3,244.4
Accumulated Amortization	(1,727.8)	(1,296.4)
Carrying Amount, Net	6,349.0	1,948.0
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Carrying Amount, Gross	9,177.8	7,914.4
Accumulated Amortization	(1,727.8)	(1,296.4)
Carrying Amount, Net	7,450.0	6,618.0
Acquired IPR&D
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	1,101.0	4,670.0
Marketed products
Finite-lived intangible assets:
Carrying Amount, Gross	7,984.0	3,150.2
Accumulated Amortization	(1,659.5)	(1,244.6)
Carrying Amount, Net	6,324.5	1,905.6
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	(1,659.5)	(1,244.6)
Other intangibles
Finite-lived intangible assets:
Carrying Amount, Gross	92.8	94.2
Accumulated Amortization	(68.3)	(51.8)
Carrying Amount, Net	24.5	42.4
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	$ (68.3)	$ (51.8)