Pensions and Other Benefit Plans - Schedule of Net Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2022	Jan. 03, 2021	Dec. 29, 2019
Change in Benefit Obligation
Amendments	$ (1,800)
Amounts Recognized in the Company’s Balance Sheet consist of the following:
Non-current assets	4,436	$ 656
Current liabilities	(557)	(547)
Non-current liabilities	(8,898)	(10,771)
Retirement Plans
Change in Benefit Obligation
Projected benefit obligation - beginning of year	43,300	37,188
Service cost	1,421	1,380	$ 1,163
Interest cost	770	955	1,096
Plan participant contributions	67	61
Amendments	5	(1,780)
Actuarial (gains) losses(2)	(2,132)	5,716
Divestitures & acquisitions	(2)	(88)
Curtailments, settlements & restructuring	(7)	(24)
Benefits paid from plan	(1,157)	(1,111)
Effect of exchange rates	(683)	1,003
Projected benefit obligation - end of year	41,582	43,300	37,188
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value — beginning of year	38,195	32,201
Actual return on plan assets	4,439	5,524
Company contributions	969	870
Plan participant contributions	67	61
Settlements	(7)	(13)
Divestitures & acquisitions	(2)	(84)
Benefits paid from plan assets	(1,157)	(1,111)
Effect of exchange rates	(574)	747
Plan assets at fair value - End of year	41,930	38,195	32,201
Funded status - end of year	348	(5,105)
Amounts Recognized in the Company’s Balance Sheet consist of the following:
Non-current assets	4,436	656
Current liabilities	(115)	(125)
Non-current liabilities	(3,973)	(5,636)
Total recognized in the consolidated balance sheet — end of year	348	(5,105)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net actuarial loss	5,539	10,860
Prior service cost (credit)(1)	(1,610)	(1,797)
Unrecognized net transition obligation	0	0
Total before tax effects	3,929	9,063
Accumulated Benefit Obligation	39,049	40,356
Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax [Abstract]
Net periodic benefit cost	623	790	593
Net actuarial (gain) loss	(3,927)	2,616
Amortization of net actuarial loss	(1,257)	(891)
Prior service cost (credit)	5	(1,780)
Amortization of prior service (cost) credit	181	(2)
Effect of exchange rates	(136)	293
Total loss/(income) recognized in other comprehensive income, before tax	(5,134)	236
Total recognized in net periodic benefit cost and other comprehensive income	(4,511)	1,026
Other Benefit Plans
Change in Benefit Obligation
Projected benefit obligation - beginning of year	5,028	5,076
Service cost	309	287	274
Interest cost	81	133	185
Plan participant contributions	0	0
Amendments	0	0
Actuarial (gains) losses(2)	(188)	(75)
Divestitures & acquisitions	0	0
Curtailments, settlements & restructuring	0	0
Benefits paid from plan	(348)	(396)
Effect of exchange rates	(4)	3
Projected benefit obligation - end of year	4,878	5,028	5,076
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value — beginning of year	90	115
Actual return on plan assets	17	14
Company contributions	343	357
Plan participant contributions	0	0
Settlements	0	0
Divestitures & acquisitions	0	0
Benefits paid from plan assets	(348)	(396)
Effect of exchange rates	0	0
Plan assets at fair value - End of year	102	90	115
Funded status - end of year	(4,776)	(4,938)
Amounts Recognized in the Company’s Balance Sheet consist of the following:
Non-current assets	0	0
Current liabilities	(438)	(418)
Non-current liabilities	(4,338)	(4,520)
Total recognized in the consolidated balance sheet — end of year	(4,776)	(4,938)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net actuarial loss	1,113	1,463
Prior service cost (credit)(1)	(13)	(44)
Unrecognized net transition obligation	0	0
Total before tax effects	1,100	1,419
Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax [Abstract]
Net periodic benefit cost	503	524	$ 551
Net actuarial (gain) loss	(199)	(81)
Amortization of net actuarial loss	(151)	(142)
Prior service cost (credit)	0	0
Amortization of prior service (cost) credit	31	31
Effect of exchange rates	0	1
Total loss/(income) recognized in other comprehensive income, before tax	(319)	(191)
Total recognized in net periodic benefit cost and other comprehensive income	$ 184	$ 333