Pension and Retiree Medical Benefits Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 21, 2020	Mar. 23, 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
Defined Benefit Plan, Interest Cost	100	125
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(214)	(206)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	3	2
Defined Benefit Plan, Amortization of Gain (Loss)	45	37
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits	6	(5)
Defined Benefit Plan, Other Cost (Credit)	(60)	(47)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	40	41
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer, Discretionary		17
Defined Benefit Plan, Service Cost	17	13
Defined Benefit Plan, Interest Cost	16	17
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(37)	(33)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0
Defined Benefit Plan, Amortization of Gain (Loss)	10	5
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits	0	0
Defined Benefit Plan, Other Cost (Credit)	(11)	(11)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	6	2
Retiree Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	6	5
Defined Benefit Plan, Interest Cost	6	8
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4)	(4)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(3)	(4)
Defined Benefit Plan, Amortization of Gain (Loss)	(5)	(6)
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits	0	0
Defined Benefit Plan, Other Cost (Credit)	$ (6)	(6)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		$ (1)