Goodwill And Indefinite-Lived Intangible Assets Impairment Test Intangible Table (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Gross	$ 42.3	$ 39.8
Finite-Lived Intangible Assets, Accumulated Amortization	23.0	20.6
Finite-Lived Intangible Assets, Net	19.3	19.2
Indefinite-lived Intangible Assets (Excluding Goodwill)	245.5	150.2
Other intangible assets, net	$ 264.8	$ 169.4