Nature of Operations and Significant Accounting Policies (Summary Of Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	17 years 10 months 24 days
Gross Asset	$ 920.0	$ 941.7
Accumulated Amortization	503.4	474.6
Net	$ 416.6	467.1	$ 520.3	$ 505.1
Intellectual property rights
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	15 years 1 month 6 days
Gross Asset	$ 132.1	136.8
Accumulated Amortization	59.1	59.2
Net	$ 73.0	77.6
Customer relationships and backlog
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	18 years 4 months 24 days
Gross Asset	$ 635.5	651.7
Accumulated Amortization	329.8	308.8
Net	$ 305.7	342.9
Drawings
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	40 years
Gross Asset	$ 11.1	11.1
Accumulated Amortization	10.7	10.6
Net	$ 0.4	0.5
Other
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period of Finite Lived Assets (in years)	11 years 8 months 12 days
Gross Asset	$ 141.3	142.1
Accumulated Amortization	103.8	96.0
Net	$ 37.5	$ 46.1