Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 62,978	$ 60,785	$ 59,471	$ 59,752
Net change	595	(564)	953	(311)
Ending Balance	64,473	58,210	64,473	58,210
Accumulated Foreign Currency Adjustment Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance			(8,705)
Net change			(741)
Ending Balance	(9,446)		(9,446)
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			(6,891)
Net change			587
Ending Balance	(6,304)		(6,304)
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			(295)
Net change			1,106
Ending Balance	811		811
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(15,533)	(14,969)	(15,891)	(15,222)
Net change	595	(564)	953	(311)
Ending Balance	$ (14,938)	$ (15,533)	$ (14,938)	$ (15,533)