Strategic Actions - Additional Information (Detail) - Jul. 20, 2015 - Subsequent Event $ in Billions	USD ($) Employee
Strategic Actions [Line Items]
Estimated 2015 sales for programs potentially impacted by strategic review	$ 6.0
Number of employees in programs potentially impacted by strategic review | Employee	17,000
Sikorsky Aircraft (Sikorsky)
Strategic Actions [Line Items]
Acquisition purchase price	$ 9.0
Cash tax benefit, estimated net present value	$ 1.9