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 ($)	Dec. 31, 2017 USD ($) Claim	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Oct. 06, 2016 USD ($)	Sep. 30, 2016 USD ($)	Apr. 22, 2016 USD ($)	Feb. 09, 2016 USD ($)	Aug. 21, 2015 USD ($)	Jul. 02, 2015 USD ($)	Dec. 31, 2014	Jun. 16, 2014 USD ($)	Sep. 17, 2013 USD ($)	Sep. 11, 2013 USD ($)	Jul. 31, 2013 USD ($)	Mar. 01, 2013 USD ($)	Feb. 25, 2013 USD ($)	Nov. 28, 2012 USD ($)	Oct. 23, 2012 USD ($)	Aug. 17, 2011 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				$ 62,500,000	$ 56,000,000	$ 49,900,000
Current asbestos liability			$ 71,000,000	$ 85,000,000	$ 71,000,000
Asbestos Commitments And Contingencies [Member]
Loss Contingencies [Line Items]
Pending claims			36,052	32,234	36,052	41,090							47,507
Gross Settlement And Defense Incurred Costs				$ 88,300,000	$ 73,500,000	$ 69,400,000
Payments Or Receipts For Asbestos Related Fees And Costs Net Of Insurance Recoveries				$ 62,500,000	56,000,000	49,900,000
Asbestos Cumulative Claims Resolved | Claim				130,000
Cumulative Related Settlement Cost Incurred Before Insurance Recoveries				$ 535,000,000
Cumulative Asbestos Settlement Cost Per Resolved Claim				4,100
Asbestos Settlement Cost Per Resolved Claim				7,800	$ 3,900	$ 3,100
Estimated Funds Available From Post Bankruptcy Trusts To Pay Current And Future Claimants				36,000,000,000
Increase In Total Asbestos Liability			$ 227,000,000
Mesothelioma Claims Percentage Pending Asbestos Claims			10.00%		10.00%
Mesothelioma Claims Percentage Aggregate Settlement Defense Costs			90.00%		90.00%
Asbestos Liability			$ 696,000,000	605,000,000	$ 696,000,000
Percentage Of Asbestos Liability Attributable To Settlement And Denfese Costs For Future Claims			80.00%		80.00%
Current asbestos liability				$ 85,000,000
Number of coverage in place agreements with excess insurer groups				11
Number of buyout agreements with excess insurer groups				10
Aggregate Value Of Policy Buy Out Agreements				$ 82,500,000
Estimated Percentage Of Insurance Which Covers Asbestos Costs			21.00%		21.00%
Insurance Receivable Asbestos			$ 143,000,000	$ 115,000,000	$ 143,000,000
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
Additional Judgment Interest																							$ 10,000
Share Of Responsibility Of Verdict																								9.09%
Asbestos Commitments And Contingencies [Member] | Ronald Dummitt [Member]
Loss Contingencies [Line Items]
Jury Verdict																						$ 32,000,000
Jury verdict percentage of responsibility.																						99.00%
Court written decision																						$ 8,000,000
Court Judgment																						$ 4,900,000
courtjudgmentwithinterest								$ 6,600,000
Asbestos Commitments And Contingencies [Member] | Gerald Suttner [Member]
Loss Contingencies [Line Items]
Court Judgment																					$ 100,000
courtjudgmentwithinterest								$ 200,000
Share Of Responsibility Of Verdict																					4.00%
Plaintiff's Damages																					$ 3,000,000
Asbestos Commitments And Contingencies [Member] | James Hellam [Member]
Loss Contingencies [Line Items]
Court Judgment																				$ 1,282,000
Share Of Responsibility Of Verdict																				7.00%
Jury Verdict Non-Economic Damages																				$ 4,500,000
Jury Verdict Economic Damages																				900,000
CourtJudgmentIncludingSetoffs																				$ 1,100,000
DamagesReversedInPart											$ 20,000
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] | Holdsworth [Member]
Loss Contingencies [Line Items]
Court Judgment																	$ 1,700,000
Jury Verdict Total																	3,100,000
Motion to enter judgment																	$ 1,000,000
Asbestos Commitments And Contingencies [Member] | Lloyd Garvin [Member]
Loss Contingencies [Line Items]
CourtJudgmentIncludingSetoffs																$ 3,500,000
Court_Reduced_Verdict																2,500,000
Court Reduced damages																3,500,000
compensatory_damages																11,000,000
Additional Damages																$ 11,000,000
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
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
Court Reduced 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				18,200
TEXAS | Asbestos Commitments And Contingencies [Member]
Loss Contingencies [Line Items]
Pending claims | Claim				600
MISSISSIPPI | Asbestos Commitments And Contingencies [Member]
Loss Contingencies [Line Items]
Pending claims | Claim				1,500
OHIO | Asbestos Commitments And Contingencies [Member]
Loss Contingencies [Line Items]
Pending claims | Claim				200