Severance and Restructuring Related Costs (Details) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 29, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 29, 2018 USD ($) Employees	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) Employees
Restructuring Cost and Reserve [Line Items]
Severance and restructuring related costs			$ 14		$ 101
Number of employees of restructuring costs | Employees			400		1,500
Remaining balance of employee severance and restructuring costs	$ 15		$ 15		$ 23
Electronic Systems [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring related costs	2	$ 2	4	$ 5
Aerospace Systems [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring related costs	0	1	1	1
Communication Systems [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring related costs	3	9	8	18
Sensor Systems [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring related costs	1	0	1	2
Consolidated [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring related costs	$ 6	$ 12	$ 14	$ 26