Revenue Recognition and Contracts with Customers (Revenue from External Customers by Geographic Areas) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Sales Revenue, Goods, Net	$ 28.9	$ 43.5	$ 83.1	$ 82.2
United States [Member]
Sales Revenue, Goods, Net	0.3	26.2	54.3	37.1
Europe [Member]
Sales Revenue, Goods, Net	28.6	17.3	28.7	17.4
Asia [Member]
Sales Revenue, Goods, Net	$ 0.0	$ 0.0	$ 0.1	$ 27.7