INFORMATION ON BUSINESS SEGMENTS - FAS/CAS Pension Adjustment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 24, 2018	Jun. 25, 2017	Jun. 24, 2018	Jun. 25, 2017
Segment Reporting Information [Line Items]
Non-operating FAS pension expense	$ (199)	$ (185)	$ (398)	$ (371)
Net FAS/CAS pension adjustment	252	219	504	436
Segment reconciling items
Segment Reporting Information [Line Items]
Less: CAS pension cost	609	562	1,217	1,124
FAS pension service cost	(158)	(158)	(315)	(317)
FAS/CAS operating adjustment	451	404	902	807
Qualified defined benefit pension plans
Segment Reporting Information [Line Items]
FAS pension expense/service cost	357	343	713	688
FAS pension service cost	(158)	(158)	(315)	(317)
Qualified defined benefit pension plans | Qualified Plan
Segment Reporting Information [Line Items]
FAS pension expense/service cost	$ (357)	$ (343)	$ (713)	$ (688)