Goodwill and Intangible Assets (Amortization Expense) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible asset amortization expense	$ 368,100,000	$ 405,600,000	$ 1,070,900,000	$ 1,210,300,000
IPR&D intangible asset impairment charges	0	0	0	29,500,000
Total intangible asset amortization expense (including impairment charges)	$ 368,100,000	$ 407,500,000	$ 1,070,900,000	1,282,100,000
Impairment of Intangible Assets, Finite-lived				$ 42,300,000