Goodwill and Intangible Assets (Schedule of Goodwill) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Gross balance at period start	$ 182.9
Accumulated impairments at period start	(89.3)
Net balance at period start	93.6
Foreign exchange	2.1
Gross balance at period end	185.0
Accumulated impairments at period end	(89.3)
Net balance at period end	95.7
EMEA Segment [Member]
Gross balance at period start	25.6
Accumulated impairments at period start	(6.9)
Net balance at period start	18.7
Foreign exchange	1.7
Gross balance at period end	27.3
Accumulated impairments at period end	(6.9)
Net balance at period end	20.4
South Latin America Segment [Member]
Gross balance at period start	72.3
Accumulated impairments at period start	0.0
Net balance at period start	72.3
Foreign exchange	0.4
Gross balance at period end	72.7
Accumulated impairments at period end	0.0
Net balance at period end	72.7
Asia Pacific Segment [Member]
Gross balance at period start	85.0
Accumulated impairments at period start	(82.4)
Net balance at period start	2.6
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