Inventories (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015
Inventory Disclosures [Line Items]
Consignment inventory		$ 19.3	$ 19.0
Venezuelan subsidiary [Member] | Cost of Sales [Member]
Inventory Disclosures [Line Items]
Inventory, lower of cost or market charges recognized	$ 9.5
United States and Canada [Member]
Inventory Disclosures [Line Items]
Consignment inventory, percentage		80.00%