Employee Severance and Termination Costs - Employee Severance and Other Termination Costs Incurred by Reportable Segment (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 23, 2016	Sep. 25, 2015	Sep. 23, 2016	Sep. 25, 2015	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Employee severance and other termination costs	$ 5	$ 4	$ 11	$ 10	$ 18
Electronic Systems [Member]
Restructuring Cost and Reserve [Line Items]
Employee severance and other termination costs	3	2	7	4
Aerospace Systems [Member]
Restructuring Cost and Reserve [Line Items]
Employee severance and other termination costs	1	1	1	3
Communication Systems [Member]
Restructuring Cost and Reserve [Line Items]
Employee severance and other termination costs	$ 1	$ 1	$ 3	$ 3