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Acquisitions And Divestitures (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended
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Sep. 30, 2011 | Jun. 30, 2011 | Jun. 30, 2011 TransDigm Group Inc. [Member] | Dec. 31, 2010 TransDigm Group Inc. [Member]
Business acquisition cost |  |  | $ 240 |
Number of employees |  |  | 400 |
Goodwill acquired |  |  | 213 |
Purchase price allocation adjustments | (13.0) | (53.0) |  |
Sales generated in last annual period prior to divestiture |  |  |  | 61
Amount of goodwill estimated to be deductible for income tax purposes | $ 60.0 |  |  |

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