Goodwill (Schedule of Goodwill) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)
Goodwill [Roll Forward]
Gross balance at period start	$ 185.0
Accumulated impairments at period start	(89.3)
Net balance at period start	95.7
Divestitures	0.0
Impairment of goodwill	0.0
Foreign exchange	(8.3)
Gross balance at period end	176.7
Accumulated impairments at period end	(89.3)
Net balance at period end	87.4
Europe, Middle East & Africa
Goodwill [Roll Forward]
Gross balance at period start	27.3
Accumulated impairments at period start	(6.9)
Net balance at period start	20.4
Divestitures	0.0
Impairment of goodwill	0.0
Foreign exchange	(2.4)
Gross balance at period end	24.9
Accumulated impairments at period end	(6.9)
Net balance at period end	18.0
South Latin America
Goodwill [Roll Forward]
Gross balance at period start	72.7
Accumulated impairments at period start	0.0
Net balance at period start	72.7
Divestitures	0.0
Impairment of goodwill	0.0
Foreign exchange	(5.9)
Gross balance at period end	66.8
Accumulated impairments at period end	0.0
Net balance at period end	66.8
Asia Pacific
Goodwill [Roll Forward]
Gross balance at period start	85.0
Accumulated impairments at period start	(82.4)
Net balance at period start	2.6
Divestitures	0.0
Impairment of goodwill	0.0
Foreign exchange	0.0
Gross balance at period end	85.0
Accumulated impairments at period end	(82.4)
Net balance at period end	$ 2.6