POSTRETIREMENT PLANS - Schedule of Pretax Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 24, 2017	Sep. 25, 2016	Sep. 24, 2017	Sep. 25, 2016
Qualified defined benefit pension plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 205	$ 208	$ 615	$ 615
Interest cost	452	465	1,357	1,396
Expected return on plan assets	(602)	(667)	(1,806)	(2,000)
Recognized net actuarial losses	376	340	1,129	1,019
Amortization of prior service (credits) costs	(89)	(90)	(265)	(272)
Total net periodic benefit cost	342	256	1,030	758
Retiree medical and life insurance plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	5	6	15	18
Interest cost	25	30	76	89
Expected return on plan assets	(31)	(34)	(95)	(103)
Recognized net actuarial losses	4	8	14	25
Amortization of prior service (credits) costs	4	5	11	16
Total net periodic benefit cost	$ 7	$ 15	$ 21	$ 45