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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 |

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