Reorganization Costs (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Reorganization costs	$ 47.9	$ 121.4	$ 97.9
Closure of manufacturing facilities and asset impairments
Restructuring Cost and Reserve [Line Items]
Reorganization costs	28.1	77.4
Employee termination and other costs
Restructuring Cost and Reserve [Line Items]
Reorganization costs	$ 10.6	$ 16.2