Commitments And Contingencies (Schedule Of Gross Settlement And Defense Costs) (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) claim	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Loss Contingencies [Line Items]
Payments Or Receipts For Asbestos Related Fees And Costs Net Of Insurance Recoveries	$ 41,500,000	$ 63,900,000	$ 62,500,000
Asbestos Commitments And Contingencies [Member]
Loss Contingencies [Line Items]
Asbestos Cumulative Claims Resolved | claim	139,000
Settlement / indemnity costs incurred	$ 45,500,000	63,000,000.0	51,800,000
Defense costs incurred	20,700,000	25,800,000	36,500,000
Gross Settlement And Defense Incurred Costs	66,200,000	88,800,000	88,300,000
Payments For Asbestos Related Settlement And Indemnity	38,900,000	61,500,000	51,700,000
Payments For Asbestos Related Defense And Related Fees Costs	21,400,000	26,500,000	38,900,000
InsuranceInflow	(18,800,000)	(24,100,000)	(28,100,000)
Payments Or Receipts For Asbestos Related Fees And Costs Net Of Insurance Recoveries	41,500,000	63,900,000	62,500,000
Cumulative Related Settlement Cost Incurred Before Insurance Recoveries	640,000,000
Cumulative Asbestos Settlement Cost Per Resolved Claim	4,600
Asbestos Settlement Cost Per Resolved Claim	$ 15,800	$ 11,300	$ 7,800