Inventories (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Inventories [Line Items]
Inventories stated on the LIFO basis	$ 13.5	$ 12.2
Inventories stated value below replacement costs	13.4	18.3
PE Films [Member]
Inventories [Line Items]
Cost of goods sold stated at below current replacement costs	$ 0.4	$ 1.0	$ 0.9