Nature Of Operations (Schedule Of Sales Allocated To Geographic Area) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	$ 2,420.0	$ 2,515.3	$ 2,527.4
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	1,901.8	1,926.7	1,954.3
Europe, Middle East & Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	287.9	346.7	351.3
Pacific Rim [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	230.3	241.9	221.8
United States [Member] | Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	1,738.5	1,728.3	1,743.8
Canada [Member] | Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	131.5	164.9	176.6
United Kingdom [Member] | Europe, Middle East & Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	85.8	80.1	82.3
France [Member] | Europe, Middle East & Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	43.6	55.9	55.6
Russia [Member] | Europe, Middle East & Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	37.9	64.9	68.0
Saudi Arabia [Member] | Europe, Middle East & Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	10.8	20.8	18.1
China [Member] | Pacific Rim [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	85.5	92.4	81.3
India [Member] | Pacific Rim [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	54.0	50.5	40.3
Australia [Member] | Pacific Rim [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	53.9	64.2	66.2
Other [Member] | Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	31.8	33.5	33.9
Other [Member] | Europe, Middle East & Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	109.8	125.0	127.3
Other [Member] | Pacific Rim [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net trade sales	$ 36.9	$ 34.8	$ 34.0