Intangible Assets and Goodwill (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 6.5	$ 6.3
Future amortization expense, remainder of fiscal year	19.4
Future amortization expense, 2018	25.9
Future amortization expense, 2019	25.9
Future amortization expense, 2020	25.9
Future amortization expense, 2021	24.9
Future amortization expense, 2022	24.0
Future amortization expense, thereafter	$ 209.1