Restructuring (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) employees	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Asset-Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 21.4	$ 17.7
November 2015 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 33.0	65.8	8.6
Total aggregate costs to date	107.4
November 2015 Restructuring Program | Employee Separation Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2.7	10.5	2.2
Number of employees | employees	480
Number of manufacturing employees | employees	360
Number of non-manufacturing employees | employees	120
Total aggregate costs to date	$ 15.4
November 2015 Restructuring Program | Asset-Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.4	19.4	1.9
Total aggregate costs to date	23.7
November 2015 Restructuring Program | Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	27.9	35.9	4.5
Total aggregate costs to date	68.3
November 2015 Restructuring Program | North America
Restructuring Cost and Reserve [Line Items]
Restructuring charges	31.5	48.7	0.1
Total aggregate costs to date	80.3
November 2015 Restructuring Program | North America | Employee Separation Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.4	6.3	0.1
November 2015 Restructuring Program | North America | Asset-Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.3	13.9
November 2015 Restructuring Program | North America | Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	27.8	28.5
November 2015 Restructuring Program | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.2	13.7	6.7
Total aggregate costs to date	21.6
November 2015 Restructuring Program | Europe | Employee Separation Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.3	3.4	1.4
November 2015 Restructuring Program | Europe | Asset-Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.1	3.7	1.0
November 2015 Restructuring Program | Europe | Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(0.2)	6.6	4.3
November 2015 Restructuring Program | Latin America
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.3	3.4	1.8
Total aggregate costs to date	5.5
November 2015 Restructuring Program | Latin America | Employee Separation Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		0.8	0.7
November 2015 Restructuring Program | Latin America | Asset-Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		1.8	0.9
November 2015 Restructuring Program | Latin America | Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.3	0.8	0.2
July 2014 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring charges		11.6	42.0
Total aggregate costs to date	$ 220.0
July 2014 Restructuring Program | North America
Restructuring Cost and Reserve [Line Items]
Restructuring charges		6.0	11.9
July 2014 Restructuring Program | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring charges		2.7	22.1
July 2014 Restructuring Program | Latin America
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 2.9	$ 7.9