Pension and Retiree Medical Benefits Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 24, 2018	Mar. 25, 2017
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 100	$ 93
Defined Benefit Plan, Interest Cost	111	108
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(218)	(196)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	1
Defined Benefit Plan, Amortization of Gain (Loss)	41	28
Defined Benefit Plan Period Gross	35	33
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits	3	1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	38	34
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	18	16
Defined Benefit Plan, Interest Cost	17	15
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(36)	(30)
Defined Benefit Plan, Amortization of Gain (Loss)	8	9
Defined Benefit Plan Period Gross	7	10
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits	1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	8	10
Retiree Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	7	6
Defined Benefit Plan, Interest Cost	8	9
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4)	(5)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(5)	(6)
Defined Benefit Plan, Amortization of Gain (Loss)	(2)	(3)
Defined Benefit Plan Period Gross	4	1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 4	$ 1