Commitments And Contingencies (Asbestos Liability) (Detail)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016 USD ($) LegalMatter Claim	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) LegalMatter Claim	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Apr. 22, 2016 USD ($)	Mar. 31, 2016	Feb. 09, 2016 USD ($)	Aug. 21, 2015 USD ($)	Jul. 02, 2015 USD ($)	Mar. 31, 2015	Sep. 30, 2014 USD ($)	Jun. 16, 2014 USD ($)	Sep. 17, 2013 USD ($)	Sep. 11, 2013 USD ($)	Jul. 31, 2013 USD ($)	Mar. 01, 2013 USD ($)	Feb. 25, 2013 USD ($)	Nov. 28, 2012 USD ($)	Oct. 23, 2012 USD ($)	Mar. 09, 2012	Dec. 31, 2011 USD ($)	Aug. 17, 2011 USD ($)	Feb. 23, 2011 USD ($)	Mar. 23, 2010 USD ($)
Loss Contingencies [Line Items]
Payments for asbestos-related fees and costs, net of insurance recoveries			$ 25,700,000	$ 24,800,000
Current portion of total estimated liability	$ 75,000,000		$ 75,000,000		$ 75,000,000
Airplane Operating Lease Period Years						five
Fair Value Of Residual Value Guarantee														$ 7,800,000
Fair Value Of Residual Value Guarantee, Fair Value of Operating Lease Asset Threshold														$ 9,500,000
Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Pending claims	38,664	42,052	38,664	42,052	41,090	47,507			40,649				44,587
Payments for asbestos-related fees and costs, net of insurance recoveries	$ 14,900,000	$ 14,100,000	$ 25,700,000	$ 24,800,000	$ 49,900,000
Cumulative claims resolved | Claim	120,000		120,000
Settlement cost	$ 468,000,000		$ 468,000,000
Average settlement cost per resolved claim					3,100	$ 3,800	$ 3,300
Cumulative average settlement cost per resolved claim	$ 3,900		$ 3,900
Number of years included in methodology base reference period	2		2
Additional quarters included in methodology base reference period	3		3
Estimated payments to current and future claimants	$ 36,000,000,000		$ 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	512,000,000		512,000,000																					$ 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		$ 75,000,000
Number of coverage in place agreements with excess insurer groups	11		11
Number of buyout agreements with excess insurer groups	10		10
Aggregate value of policy buyout agreements	$ 82,500,000		$ 82,500,000
Forecasted percentage of liability that would be reimbursed by insurers																								25.00%
Insurance reimbursement asset	121,000,000		121,000,000																					$ 225,000,000
Gross Settlement And Defense Incurred Costs	$ 16,500,000	$ 19,500,000	$ 37,800,000	$ 37,800,000	$ 69,400,000
Frank Paasch | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Share Of Responsibility Of Verdict
James Nelson | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Jury verdict																											$ 14,500,000
Share Of Responsibility Of Verdict																											9.09%
Court judgment against all parties held responsible																										$ 4,000,000
Additional interest on the compensation awarded																										10,000
Larry Bell | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court Judgment																										$ 200,000
Jury verdict																											$ 3,500,000
Share Of Responsibility Of Verdict																											5.00%
Ronald Dummitt | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court written decision																									$ 8,000,000
Court Judgment																									4,900,000
courtjudgmentwithinterest																									$ 6,600,000
Jury verdict percentage of responsibility.																									99.00%
Jury verdict																									$ 32,000,000
Frank Paasch | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Jury verdict																				$ 2,500,000
Share Of Responsibility Of Verdict																				10.00%
Frank Vincinguerra | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Jury verdict																				$ 2,300,000
Share Of Responsibility Of Verdict																				20.00%
Gerald Suttner | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court Judgment																						$ 100,000
courtjudgmentwithinterest																						$ 200,000
Share Of Responsibility Of Verdict																						4.00%
Plaintiff's Damages																						$ 3,000,000
James Hellam | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court Judgment																					$ 1,282,000
CourtJudgmentIncludingSetoffs																					$ 1,100,000
DamagesReversedInPart											$ 20,000
Share Of Responsibility Of Verdict																					7.00%
Jury Verdict Non-Economic Damages																					$ 4,500,000
Jury Verdict Economic Damages																					$ 900,000
Ivo Peraica | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court Judgment																			$ 10,600,000
Jury Verdict Total																			35,000,000
Court_Reduced_Verdict																			$ 18,000,000
Holdsworth [Member] | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court Judgment																		$ 1,700,000
Jury Verdict Total																		$ 3,100,000
Lloyd Garvin [Member] | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Compensatory Damages																	$ 11,000,000
Additional damages																	11,000,000
CourtJudgmentIncludingSetoffs																	3,500,000
Court_Reduced_Verdict																	2,500,000
Court Reduced damages																	$ 3,500,000
Richard DeLisle [Member] | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court Judgment																$ 1,300,000
Jury verdict																$ 8,000,000
Share Of Responsibility Of Verdict																16.00%
Ivan Sweberg [Member] | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court Judgment															$ 5,300,000
Jury Verdict Total															15,000,000
Court_Reduced_Verdict															10,000,000
Selwyn Hackshaw [Member] | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court Judgment															3,100,000
Jury Verdict Total															10,000,000
Court_Reduced_Verdict															$ 6,000,000
James Poage [Member] | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Compensatory Damages												$ 1,500,000
Additional damages												10,000,000
Court Judgment												$ 10,800,000
Valent Rabovsky [Member] | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court Judgment								$ 400,000
Jury Verdict Total										$ 1,085,000
Share Of Responsibility Of Verdict										30.00%
George Coulbourn [Member] | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Court Judgment								6,800,000
Jury Verdict Total								9,000,000
Court Reduced damages								$ 5,000,000
Share Of Responsibility Of Verdict								20.00%
New York | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Pending claims | LegalMatter	18,400		18,400
Mississippi | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Pending claims | LegalMatter	5,100		5,100
Texas | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Pending claims | LegalMatter	3,300		3,300
Ohio | Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Pending claims | LegalMatter	200		200