Components of Net Periodic Benefit Cost for Pension and Retiree Medical Plans (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 19, 2016	Mar. 21, 2015
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	$ 7
U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	91	$ 101
Interest cost	111	126
Expected return on plan assets	(192)	(196)
Amortization of prior service credit		(1)
Amortization of net loss	38	47
Gross total	48	77
Special termination benefits		4
Total expense	48	81
International
Defined Benefit Plan Disclosure [Line Items]
Service cost	15	19
Interest cost	18	22
Expected return on plan assets	(31)	(33)
Amortization of net loss	8	14
Gross total	10	22
Total expense	10	22
Retiree Medical
Defined Benefit Plan Disclosure [Line Items]
Service cost	7	8
Interest cost	9	12
Expected return on plan assets	(5)	(6)
Amortization of prior service credit	(9)	(9)
Gross total	2	5
Special termination benefits		1
Total expense	$ 2	$ 6