Pension and Retiree Medical Benefits Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 15, 2019	Jun. 16, 2018	Jun. 15, 2019	Jun. 16, 2018
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 88	$ 99	$ 176	$ 199
Defined Benefit Plan, Interest Cost	126	111	251	222
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(206)	(217)	(412)	(435)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	3	0	5	1
Defined Benefit Plan, Amortization of Gain (Loss)	37	42	74	83
Defined Benefit Plan Period Gross			94	70
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits			(5)	3
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	48	35	89	73
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	18	22	31	40
Defined Benefit Plan, Interest Cost	23	23	40	40
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(45)	(48)	(78)	(84)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0	0
Defined Benefit Plan, Amortization of Gain (Loss)	8	11	13	19
Defined Benefit Plan Period Gross			6	15
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits			0	1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	4	8	6	16
Retiree Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	6	8	11	15
Defined Benefit Plan, Interest Cost	8	8	16	16
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4)	(5)	(8)	(9)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(5)	(4)	(9)	(9)
Defined Benefit Plan, Amortization of Gain (Loss)	(6)	(3)	(12)	(5)
Defined Benefit Plan Period Gross			(2)	8
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits			0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (1)	$ 4	$ (2)	$ 8