Pension and Retiree Medical Benefits Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 13, 2020	Jun. 15, 2019	Jun. 13, 2020	Jun. 15, 2019
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer, Discretionary			$ 150	$ 150
Defined Benefit Plan, Service Cost	$ 100	$ 88	200	176
Defined Benefit Plan, Interest Cost	100	126	200	251
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(215)	(206)	(429)	(412)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	2	3	5	5
Defined Benefit Plan, Amortization of Gain (Loss)	46	37	91	74
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits	1	0	7
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits				(5)
Defined Benefit Plan, Other Cost (Credit)	(66)	(40)	(126)	(87)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	34	48	74	89
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer, Discretionary			14	17
Defined Benefit Plan, Service Cost	20	18	37	31
Defined Benefit Plan, Interest Cost	21	23	37	40
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(49)	(45)	(86)	(78)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0	0
Defined Benefit Plan, Amortization of Gain (Loss)	16	8	26	13
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits	0	0	0	0
Defined Benefit Plan, Other Cost (Credit)	(12)	(14)	(23)	(25)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	8	4	14	6
Retiree Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	5	6	11	11
Defined Benefit Plan, Interest Cost	5	8	11	16
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4)	(4)	(8)	(8)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(2)	(5)	(5)	(9)
Defined Benefit Plan, Amortization of Gain (Loss)	(5)	(6)	(10)	(12)
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits	0	0	0	0
Defined Benefit Plan, Other Cost (Credit)	(6)	(7)	(12)	(13)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (1)	$ (1)	$ (1)	$ (2)