Commitments And Contingencies (Schedule Of Activity Related To Asbestos Claim) (Detail) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2014 USD ($)
Loss Contingencies [Line Items]
Airplane Operating Lease Period Years						five
Fair Value Of Residual Value Guarantee							$ 7.8
Fair Value Of Residual Value Guarantee, Fair Value of Operating Lease Asset Threshold							$ 9.5
Asbestos Commitments and Contingencies
Loss Contingencies [Line Items]
Beginning claims	40,649	44,587	41,090	47,507	47,507
New claims	662	658	1,642	1,291	2,572
Settlements	(147)	(313)	(541)	(521)	(954)
Dismissals	(2,500)	(2,880)	(3,527)	(6,225)	(8,035)
Ending claims	38,664	42,052	38,664	42,052	41,090	47,507