Commitments And Contingencies (Asbestos Liability Narrative) (Details)	3 Months Ended			12 Months Ended
	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) claim	Dec. 31, 2019 USD ($) claim	Dec. 31, 2018 USD ($) claim	Dec. 31, 2017 USD ($) claim	Oct. 06, 2016 USD ($)	Apr. 22, 2016 USD ($)	Feb. 09, 2016 USD ($)	Jul. 02, 2015 USD ($)	Jun. 16, 2014 USD ($)	Sep. 17, 2013 USD ($)	Mar. 01, 2013 USD ($)	Feb. 25, 2013 USD ($)	Feb. 23, 2011 USD ($)	Mar. 23, 2010 USD ($)
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
Current asbestos liability				$ 65,000,000.0	$ 66,000,000.0
Asbestos Commitments And Contingencies [Member]
Loss Contingencies [Line Items]
Pending claims | claim			36,052	29,056	29,089	32,234
Gross Settlement And Defense Incurred Costs				$ 66,200,000	$ 88,800,000	$ 88,300,000
Payments Or Receipts For Asbestos Related Fees And Costs Net Of Insurance Recoveries				$ 41,500,000	63,900,000	62,500,000
Asbestos Cumulative Claims Resolved | claim				139,000
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
Estimated Funds Available From Post Bankruptcy Trusts To Pay Current And Future Claimants				36,000,000,000
Asbestos Liability				$ 712,000,000
Percentage Of Asbestos Liability Attributable To Settlement And Denfese Costs For Future Claims				85.00%
Current asbestos liability				$ 65,000,000
Aggregate Value Of Policy Buy Out Agreements				$ 82,500,000
Estimated Percentage Of Insurance Which Covers Asbestos Costs				14.00%
Insurance Receivable Asbestos				$ 98,000,000
Asbestos Commitments And Contingencies [Member] | James Nelson [Member]
Loss Contingencies [Line Items]
Jury Verdict																$ 14,500,000
Court Judgment Against All Parties Held Responsible															$ 4,000,000.0
Additional Judgment Interest															$ 10,000.00
Share Of Responsibility Of Verdict																9.09%
Asbestos Commitments And Contingencies [Member] | Thomas Amato [Member]
Loss Contingencies [Line Items]
Jury Verdict														$ 2,500,000
Share Of Responsibility Of Verdict														10.00%
PaidJuryVerdict	$ 300,000
Asbestos Commitments And Contingencies [Member] | Frank Vincinguerra [Member]
Loss Contingencies [Line Items]
Jury Verdict														$ 2,300,000
Share Of Responsibility Of Verdict														20.00%
PaidJuryVerdict			$ 600,000
Asbestos Commitments And Contingencies [Member] | Ivo Peraica [Member]
Loss Contingencies [Line Items]
Court Judgment													$ 10,600,000
Reduced Damages							$ 4,250,000
CourtJudgmentIncludingSetoffs							1,940,000
Paid Judgment Pursuant to Appeal		$ 2,700,000
Jury Verdict Total													35,000,000
Court_Reduced_Verdict													$ 18,000,000
Asbestos Commitments And Contingencies [Member] | Richard DeLisle [Member]
Loss Contingencies [Line Items]
Jury Verdict												$ 8,000,000
Court Judgment												$ 1,300,000
Share Of Responsibility Of Verdict												16.00%
Asbestos Commitments And Contingencies [Member] | Ivan Sweberg [Member]
Loss Contingencies [Line Items]
Court Judgment											$ 5,300,000
Reduced Damages							9,500,000
CourtJudgmentIncludingSetoffs							4,730,000
Paid Judgment Pursuant to Appeal		$ 5,700,000
Jury Verdict Total											15,000,000
Court_Reduced_Verdict											10,000,000
Asbestos Commitments And Contingencies [Member] | Selwyn Hackshaw [Member]
Loss Contingencies [Line Items]
Court Judgment											3,100,000
Reduced Damages							3,000,000
CourtJudgmentIncludingSetoffs							$ 0
Jury Verdict Total											10,000,000
Court_Reduced_Verdict											$ 6,000,000
Asbestos Commitments And Contingencies [Member] | James Poage [Member]
Loss Contingencies [Line Items]
Court Judgment										$ 10,800,000
compensatory_damages										1,500,000
Additional Damages										$ 10,000,000
Asbestos Commitments And Contingencies [Member] | Valent Rabovsky [Member]
Loss Contingencies [Line Items]
Court Judgment								$ 400,000
Share Of Responsibility Of Verdict									30.00%
Jury Verdict Total									$ 1,085,000.000
Asbestos Commitments And Contingencies [Member] | George Coulbourn [Member]
Loss Contingencies [Line Items]
Court Judgment								$ 6,800,000
Share Of Responsibility Of Verdict								20.00%
Jury Verdict Total								$ 9,000,000
Additional Damages								$ 5,000,000
Asbestos Commitments And Contingencies [Member] | Geoffrey_Anisansel [Member]
Loss Contingencies [Line Items]
Jury Verdict Total	$ 20,000,000
NEW YORK | Asbestos Commitments And Contingencies [Member]
Loss Contingencies [Line Items]
Pending claims | claim				18,000
TEXAS | Asbestos Commitments And Contingencies [Member]
Loss Contingencies [Line Items]
Pending claims | claim				100
MISSISSIPPI | Asbestos Commitments And Contingencies [Member]
Loss Contingencies [Line Items]
Pending claims | claim				300
OHIO | Asbestos Commitments And Contingencies [Member]
Loss Contingencies [Line Items]
Pending claims | claim				200