Commitments And Contingencies (Asbestos Liability) (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) Claim	Dec. 31, 2014 USD ($) Claim	Dec. 31, 2013 USD ($) Claim	Dec. 31, 2010 Claim	Feb. 09, 2016 USD ($)	Aug. 21, 2015 USD ($)	Jul. 02, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 16, 2014 USD ($)	Sep. 17, 2013 USD ($)	Sep. 11, 2013 USD ($)	Jul. 31, 2013 USD ($)	Mar. 01, 2013 USD ($)	Feb. 25, 2013 USD ($)	Dec. 31, 2012 Claim	Nov. 28, 2012 USD ($)	Oct. 23, 2012 USD ($)	Aug. 29, 2012 USD ($)	Mar. 09, 2012	Dec. 31, 2011 USD ($)	Aug. 17, 2011 USD ($)	Feb. 23, 2011 USD ($)	Mar. 23, 2010 USD ($)
Loss Contingencies [Line Items]
Pre-tax cash payments	$ 49,900,000	$ 61,300,000	$ 62,800,000
Current portion of total estimated liability	$ 75,000,000	$ 79,000,000
Asbestos Commitments And Contingencies [Member]
Loss Contingencies [Line Items]
NumberOfNewMaritimeClaims | Claim				8
Pending claims | Claim	41,090	47,507	51,490												56,442
Gross Settlement And Defense Incurred Costs	$ 69,400,000	$ 81,100,000	$ 90,800,000
Number of coverage-in-place agreements with excess insurer groups	11
Number of buyout agreements with excess insurer groups	10
Pre-tax cash payments	$ 49,900,000	61,300,000	62,800,000
Cumulative claims resolved | Claim	116,000
Settlement cost	$ 452,000,000
Average settlement cost per resolved claim	3,100	$ 3,800	$ 3,300
Cumulative average settlement cost per resolved claim	$ 3,900
Number of years included in methodology base reference period	2
Additional quarters included in methodology base reference period	3
Estimated payments to current and future claimants	$ 36,000,000,000
Additional liability																				$ 285,000,000
Percentage of mesothelioma claims of total pending asbestos claims																				8.00%
Percentage of mesothelioma claims of aggregate settlement and defense costs																				90.00%
Liability for claims	546,000,000																			$ 894,000,000
Percentage Of Asbestos Liability Attributable To Settlement And Denfese Costs For Future Claims																				80.00%
Current portion of total estimated liability	75,000,000
Insurance reimbursement asset	129,000,000																			$ 225,000,000
Forecasted liability reimbursement rate																				25.00%
Aggregate value of policy buyout agreements	$ 82,500,000
Asbestos Commitments And Contingencies [Member] | New York [Member]
Loss Contingencies [Line Items]
Pending claims | Claim	18,500
Asbestos Commitments And Contingencies [Member] | Mississippi [Member]
Loss Contingencies [Line Items]
Pending claims | Claim	5,100
Asbestos Commitments And Contingencies [Member] | Texas [Member]
Loss Contingencies [Line Items]
Pending claims | Claim	5,000
Asbestos Commitments And Contingencies [Member] | Ohio [Member]
Loss Contingencies [Line Items]
Pending claims | Claim	200
Asbestos Commitments And Contingencies [Member] | Ivan Sweberg [Member]
Loss Contingencies [Line Items]
Jury Verdict Total									$ 15,000,000
Court_Reduced_Verdict									10,000,000
Court judgment									5,300,000
Asbestos Commitments And Contingencies [Member] | Selwyn Hackshaw [Member]
Loss Contingencies [Line Items]
Jury Verdict Total									10,000,000
Court_Reduced_Verdict									6,000,000
Court judgment									$ 3,100,000
Asbestos Commitments And Contingencies [Member] | James Nelson [Member]
Loss Contingencies [Line Items]
Share of responsibility of verdict																							9.09%
Jury verdict																							$ 14,500,000
Court judgment against all parties held responsible																						$ 4,000,000
Additional interest on the compensation awarded																						10,000
Asbestos Commitments And Contingencies [Member] | Larry Bell [Member]
Loss Contingencies [Line Items]
Share of responsibility of verdict																							5.00%
Jury verdict																							$ 3,500,000
Court judgment																						$ 200,000
Asbestos Commitments And Contingencies [Member] | Ronald Dummitt [Member]
Loss Contingencies [Line Items]
Jury verdict percentage of responsibility																					99.00%
Jury verdict																					$ 32,000,000
Court judgment																					4,900,000
Court written decision																					$ 8,000,000
Asbestos Commitments And Contingencies [Member] | Frank Paasch [Member]
Loss Contingencies [Line Items]
Share of responsibility of verdict																			12.50%
Asbestos Commitments And Contingencies [Member] | William Paulus [Member]
Loss Contingencies [Line Items]
Jury verdict payment								$ 900,000
Share of responsibility of verdict																		10.00%
Jury Verdict Non-Economic Damages																		$ 6,500,000
Jury Verdict Economic Damages																		400,000
Court judgment																		$ 800,000
Asbestos Commitments And Contingencies [Member] | Gerald Suttner [Member]
Loss Contingencies [Line Items]
Share of responsibility of verdict																	4.00%
Plaintiff's Damages																	$ 3,000,000
Court judgment																	$ 100,000
Asbestos Commitments And Contingencies [Member] | James Hellam [Member]
Loss Contingencies [Line Items]
Share of responsibility of verdict																7.00%
Jury Verdict Non-Economic Damages																$ 4,500,000
Jury Verdict Economic Damages																900,000
Court judgment																1,282,000
Court Judgment Including Set-offs																$ 1,100,000
DamagesReversedInPart						$ 20,000
Asbestos Commitments And Contingencies [Member] | Thomas Amato [Member]
Loss Contingencies [Line Items]
Share of responsibility of verdict														10.00%
Jury verdict														$ 2,500,000
Asbestos Commitments And Contingencies [Member] | Frank Vincinguerra [Member]
Loss Contingencies [Line Items]
Share of responsibility of verdict														20.00%
Jury verdict														$ 2,300,000
Asbestos Commitments And Contingencies [Member] | Ivo Peraica [Member]
Loss Contingencies [Line Items]
Jury Verdict Total													$ 35,000,000
Court_Reduced_Verdict													18,000,000
Court judgment													$ 10,600,000
Asbestos Commitments And Contingencies [Member] | Holdsworth [Member]
Loss Contingencies [Line Items]
Jury Verdict Total												$ 3,100,000
Court judgment												$ 1,700,000
Asbestos Commitments And Contingencies [Member] | Lloyd Garvin [Member]
Loss Contingencies [Line Items]
Additional damages											$ 11,000,000
Court_Reduced_Verdict											2,500,000
Court Reduced damages											3,500,000
Court Judgment Including Set-offs											3,500,000
compensatory_damages											$ 11,000,000
Asbestos Commitments And Contingencies [Member] | Richard DeLisle [Member]
Loss Contingencies [Line Items]
Share of responsibility of verdict										16.00%
Jury verdict										$ 8,000,000
Court judgment										$ 1,300,000
Asbestos Commitments And Contingencies [Member] | James Poage [Member]
Loss Contingencies [Line Items]
Additional damages							$ 10,000,000
Court judgment							10,800,000
compensatory_damages							$ 1,500,000
Asbestos Commitments And Contingencies [Member] | Valent Rabovsky [Member]
Loss Contingencies [Line Items]
Share of responsibility of verdict					30.00%
Jury Verdict Total					$ 1,085,000