Nature Of Operations And Significant Accounting Policies (Summary Of Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	$ 179.1
Weighted Average Amortization Period of Finite Lived Assets (in years)	15 years 9 months 18 days
Gross Asset	$ 556.9	$ 568.2
Accumulated Amortization	239.8	214.7
Finite-Lived Intangible Assets, Net	$ 317.1	353.5	$ 408.9
Intellectual property rights [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	16 years 6 months
Gross Asset	$ 88.3	91.3
Accumulated Amortization	51.4	50.4
Finite-Lived Intangible Assets, Net	$ 36.9	40.9
Customer relationships and backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	15 years 6 months
Gross Asset	$ 395.7	402.6
Accumulated Amortization	132.9	112.5
Finite-Lived Intangible Assets, Net	$ 262.8	290.1
Drawings [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	37 years 10 months 24 days
Gross Asset	$ 11.1	11.1
Accumulated Amortization	10.1	10.0
Finite-Lived Intangible Assets, Net	$ 1.0	1.1
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	12 years 10 months 24 days
Gross Asset	$ 61.8	63.2
Accumulated Amortization	45.4	41.8
Finite-Lived Intangible Assets, Net	$ 16.4	$ 21.4