Strategic Actions - Additional Information (Detail) $ in Billions	Jul. 20, 2015 USD ($) Employee
Strategic Actions [Line Items]
Estimated 2015 sales for programs potentially impacted by strategic review	$ 5.5
Number of employees in programs potentially impacted by strategic review | Employee	16,500
Sikorsky Aircraft Corporation
Strategic Actions [Line Items]
Acquisition purchase price	$ 9.0
Cash tax benefit, estimated net present value	$ 1.9