Goodwill and Intangible Assets (Amortization Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of Intangible Assets	$ 412.2	$ 369.4	$ 1,191.9	$ 1,052.6
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	15.5	0.0	87.5	13.0
Total Intangible asset amortization expense (including impairment charges)	$ 427.7	$ 369.4	$ 1,279.4	$ 1,065.6