Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 60,785	$ 62,889	$ 59,752	$ 60,160
Net change	(564)	130	(311)	(1,216)
Ending Balance	58,210	64,626	58,210	64,626
Accumulated Foreign Currency Adjustment Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance			(8,869)
Net change			(575)
Ending Balance	(9,444)		(9,444)
Accumulated Net Investment Gain (Loss) Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance			0
Net change			1
Ending Balance	1		1
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance			(6,158)
Net change			442
Ending Balance	(5,716)		(5,716)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance			(195)
Net change			(179)
Ending Balance	(374)		(374)
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(14,969)	(14,777)	(15,222)	(13,199)
Net change	(564)	130	(311)	(1,216)
Ending Balance	$ (15,533)	$ (14,647)	$ (15,533)	$ (14,647)