Benefits Plans (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 04, 2015	Sep. 28, 2014	Oct. 04, 2015	Sep. 28, 2014
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 57	$ 49	$ 171	$ 145
Interest cost	133	133	399	399
Expected return on plan assets	(174)	(164)	(522)	(492)
Recognized net actuarial loss	110	73	329	221
Amortization of prior service (credit) cost	(17)	(16)	(51)	(50)
Net periodic cost	109	75	326	223
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	3	9	9
Interest cost	11	13	33	39
Expected return on plan assets	(8)	(8)	(24)	(24)
Recognized net actuarial loss	2	2	5	7
Amortization of prior service (credit) cost	(1)	0	(3)	(1)
Net periodic cost	$ 7	$ 10	$ 20	$ 30