Pension and Retiree Medical Benefits Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 16, 2018	Jun. 17, 2017	Jun. 16, 2018	Jun. 17, 2017
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 99	$ 92	$ 199	$ 185
Defined Benefit Plan, Interest Cost	111	108	222	216
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(217)	(196)	(435)	(392)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)		1	1	1
Defined Benefit Plan, Amortization of Gain (Loss)	42	28	83	56
Defined Benefit Plan Period Gross	35	33	70	66
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits		1	3	2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	35	34	73	68
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	22	21	40	37
Defined Benefit Plan, Interest Cost	23	21	40	36
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(48)	(40)	(84)	(70)
Defined Benefit Plan, Amortization of Gain (Loss)	11	12	19	21
Defined Benefit Plan Period Gross	8	14	15	24
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits			1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	8	14	16	24
Retiree Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	8	7	15	13
Defined Benefit Plan, Interest Cost	8	8	16	17
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(5)	(5)	(9)	(10)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(4)	(6)	(9)	(12)
Defined Benefit Plan, Amortization of Gain (Loss)	(3)	(3)	(5)	(6)
Defined Benefit Plan Period Gross	4	1	8	2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 4	$ 1	$ 8	$ 2