Fair Value Of Assets And Liabilities (Narrative) (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) number	Sep. 30, 2015 USD ($)
Fair Value Of Assets And Liabilities [Abstract]
Gain/(loss) on instrument specific credit risk	$ 0.5		$ (0.2)	$ 0.7	$ 0.5
Number of levels assets and liabilities are grouped in | number				3
Long-lived asset impairment		$ 3.7