Restructuring Charges - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Severance charges	$ 99	$ 102
Sikorsky Aircraft Corporation
Restructuring Cost and Reserve [Line Items]
Severance payments	40
Aeronautics
Restructuring Cost and Reserve [Line Items]
Severance charges	80
Severance payments	70
Information Systems & Global Solutions
Restructuring Cost and Reserve [Line Items]
Severance charges		15
Rotary and Mission Systems & Information System and Global Solutions
Restructuring Cost and Reserve [Line Items]
Severance charges		82
Severance payments	$ 64
Rotary and Mission Systems
Restructuring Cost and Reserve [Line Items]
Severance charges		$ 67