Pension and Retiree Medical Benefits Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 23, 2019	Mar. 24, 2018
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 88	$ 100
Defined Benefit Plan, Interest Cost	125	111
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(206)	(218)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	2	1
Defined Benefit Plan, Amortization of Gain (Loss)	37	41
Defined Benefit Plan Period Gross	46	35
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits	(5)	3
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	41	38
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	13	18
Defined Benefit Plan, Interest Cost	17	17
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(33)	(36)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0
Defined Benefit Plan, Amortization of Gain (Loss)	5	8
Defined Benefit Plan Period Gross	2	7
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits	0	1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	2	8
Retiree Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	5	7
Defined Benefit Plan, Interest Cost	8	8
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4)	(4)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(4)	(5)
Defined Benefit Plan, Amortization of Gain (Loss)	(6)	(2)
Defined Benefit Plan Period Gross	(1)	4
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (1)	$ 4