Intangible Assets and Goodwill (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangibles Disclosure [Line Items]
Capitalized regulatory approval and commercial milestones	$ 18.0	$ 8.0
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	298.0
Finite-Lived Intangible Assets, Amortization Expense, Year Two	298.0
Finite-Lived Intangible Assets, Amortization Expense, Year Three	298.0
Finite-Lived Intangible Assets, Amortization Expense, Year Four	298.0
Finite-Lived Intangible Assets, Amortization Expense, Year Five	298.0
Impairment of intangible assets	0.0	0.0	$ 31.0
Amortization of Intangible Assets	315.0	321.1	$ 320.2
Purchased Technology [Member]
Goodwill and Intangibles Disclosure [Line Items]
Finite-Lived Intangible Assets, Net	$ 3,321.8	$ 3,631.4