Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 65,834	$ 61,294	$ 63,278	$ 59,471
Net change	228	710	142	358
Ending Balance	69,580	62,978	69,580	62,978
Accumulated Foreign Currency Adjustment Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance			(8,938)
Net change			141
Ending Balance	(8,797)		(8,797)
Accumulated Net Investment Gain (Loss) Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance			1
Net change			(1)
Ending Balance	0		0
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance			(6,957)
Net change			467
Ending Balance	(6,490)		(6,490)
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			652
Net change			(465)
Ending Balance	187		187
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(15,328)	(16,243)	(15,242)	(15,891)
Net change	228	710	142	358
Ending Balance	$ (15,100)	$ (15,533)	$ (15,100)	$ (15,533)