Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Direct sales to end customer as percent of consolidated sales (percent)	65.00%
Indirect sales as subcontractor or supplier as percent of consolidated sales (percent)	35.00%
Fixed price incentive fee type contracts as percent of net sales (percent)	2.00%
Cost-plus and incentive fee type contracts as percent of net sales (percent)	4.00%
Total sales	$ 2,371	$ 2,321
Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	785
Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	686
Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	493
Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	407
Department of Defense [Member]
Disaggregation of Revenue [Line Items]
Total sales	1,562
Department of Defense [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	417
Department of Defense [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	568
Department of Defense [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	371
Department of Defense [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	206
Other U.S. Government [Member]
Disaggregation of Revenue [Line Items]
Total sales	93
Other U.S. Government [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	39
Other U.S. Government [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	5
Other U.S. Government [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	24
Other U.S. Government [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	25
Total U. S. Government [Member]
Disaggregation of Revenue [Line Items]
Total sales	1,655
Total U. S. Government [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	456
Total U. S. Government [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	573
Total U. S. Government [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	395
Total U. S. Government [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	231
Foreign Government Debt [Member]
Disaggregation of Revenue [Line Items]
Total sales	331
Foreign Government Debt [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	68
Foreign Government Debt [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	103
Foreign Government Debt [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	34
Foreign Government Debt [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	126
Commercial - Foreign [Member]
Disaggregation of Revenue [Line Items]
Total sales	217
Commercial - Foreign [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	167
Commercial - Foreign [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	8
Commercial - Foreign [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	21
Commercial - Foreign [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	21
Commercial - Domestic [Member]
Disaggregation of Revenue [Line Items]
Total sales	168
Commercial - Domestic [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	94
Commercial - Domestic [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	2
Commercial - Domestic [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	43
Commercial - Domestic [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	29
Product [Member]
Disaggregation of Revenue [Line Items]
Total sales	1,646
Product [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	560
Product [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	372
Product [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	364
Product [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	350
Services [Member]
Disaggregation of Revenue [Line Items]
Total sales	725
Services [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	225
Services [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	314
Services [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	129
Services [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	57
Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Total sales	1,692
Fixed-price Contract [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	664
Fixed-price Contract [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	366
Fixed-price Contract [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	329
Fixed-price Contract [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	333
Cost-plus Contract [Member]
Disaggregation of Revenue [Line Items]
Total sales	596
Cost-plus Contract [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	108
Cost-plus Contract [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	269
Cost-plus Contract [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	148
Cost-plus Contract [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	71
Time-and-materials Contract [Member]
Disaggregation of Revenue [Line Items]
Total sales	83
Time-and-materials Contract [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	13
Time-and-materials Contract [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	51
Time-and-materials Contract [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	16
Time-and-materials Contract [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	3
Cost to Cost Method [Member]
Disaggregation of Revenue [Line Items]
Total sales	1,802
Cost to Cost Method [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	533
Cost to Cost Method [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	666
Cost to Cost Method [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	390
Cost to Cost Method [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	213
Point in Time [Member]
Disaggregation of Revenue [Line Items]
Total sales	432
Point in Time [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	194
Point in Time [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	2
Point in Time [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	77
Point in Time [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	159
Output Method [Member]
Disaggregation of Revenue [Line Items]
Total sales	74
Output Method [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	51
Output Method [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	0
Output Method [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	7
Output Method [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	16
Billing Method [Member]
Disaggregation of Revenue [Line Items]
Total sales	63
Billing Method [Member] | Electronic Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	7
Billing Method [Member] | Aerospace Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	18
Billing Method [Member] | Communication Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	19
Billing Method [Member] | Sensor Systems [Member]
Disaggregation of Revenue [Line Items]
Total sales	$ 19