Goodwill and Intangible Assets (Schedule of Indefinite and Finite-Lived Intangible Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Intangible Assets [Line Items]
Acquisition Cost	$ 547.7	$ 515.8
Accumulated Amortization	(122.2)	(115.9)
Currency Translation	1.1	0.1
Intangible assets, net	426.6	400.0
Indefinite-lived trade names
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	100.3	100.3
Customer relationships
Intangible Assets [Line Items]
Acquisition Cost	269.9	257.3
Accumulated Amortization	(64.8)	(61.5)
Currency Translation	0.5	0.1
Intangible assets, net	205.6	195.9
Patents, technology and other
Intangible Assets [Line Items]
Acquisition Cost	177.5	158.2
Accumulated Amortization	(57.4)	(54.4)
Currency Translation	0.6	0.0
Intangible assets, net	$ 120.7	$ 103.8