INFORMATION ON BUSINESS SEGMENTS - FAS/CAS Pension Adjustment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 24, 2017	Sep. 30, 2018	Sep. 24, 2017
Segment Reporting Information [Line Items]
Non-operating FAS pension expense	$ (199)	$ (183)	$ (597)	$ (554)
Net FAS/CAS pension adjustment	252	220	756	656
Segment reconciling items
Segment Reporting Information [Line Items]
Less: CAS pension cost	608	562	1,825	1,686
FAS pension service cost	(157)	(159)	(472)	(476)
FAS/CAS operating adjustment	451	403	1,353	1,210
Qualified defined benefit pension plans
Segment Reporting Information [Line Items]
FAS pension expense/service cost	356	342	1,069	1,030
FAS pension service cost	(157)	(159)	(472)	(476)
Qualified defined benefit pension plans | Qualified Plan
Segment Reporting Information [Line Items]
FAS pension expense/service cost	(356)	(342)	(1,069)	(1,030)
Non-operating FAS pension expense	$ 16	$ 28	$ 49	$ 82