Commitments And Contingencies (Schedule Of Activity Related To Asbestos Claim) (Detail) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014 USD ($)	Sep. 30, 2015	Sep. 30, 2014 USD ($)	Dec. 31, 2014	Mar. 31, 2014 USD ($)
Loss Contingencies [Line Items]
Airplane Operating Lease Period Years					five
Fair Value Of Residual Value Guarantee		$ 7.8		$ 7.8
Fair Value Of Residual Value Guarantee, Fair Value of Operating Lease Asset Threshold		$ 9.5		$ 9.5
ResidualValueGuaranteePayment						$ 9.5
Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Beginning claims	42,052	49,770	47,507	51,490	51,490
New claims	669	738	1,960	2,078	2,743
Settlements	(247)	(218)	(768)	(772)	(992)
Dismissals	(762)	(2,368)	(6,987)	(4,874)	(5,734)
Ending claims	41,712	47,922	41,712	47,922	47,507