Benefits Plans (Detail) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2016	Apr. 05, 2015
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 44	$ 57
Interest cost	114	133
Expected return on plan assets	(178)	(174)
Recognized net actuarial loss	84	110
Amortization of prior service credit	(17)	(17)
Net periodic benefit cost	47	109
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	3
Interest cost	8	11
Expected return on plan assets	(8)	(8)
Recognized net actuarial loss	(1)	2
Amortization of prior service credit	(2)	(1)
Net periodic benefit cost	$ 0	$ 7