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Basis of Presentation - Additional Information (Detail) - USD ($) $ in Billions | Nov. 06, 2015 | Aug. 24, 2016
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Sikorsky Aircraft Corporation |  |
Basis of Presentation [Line Items] |  |
Acquisitions of businesses and investments in affiliates | $ 9.0 |
AWE Management Limited |  |
Basis of Presentation [Line Items] |  |
Ownership interest percentage acquired |  | 18.00%
Noncontrolling Interest, Ownership Percentage by Parent |  | 51.00%

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