Pension Benefits Change in Projected Benefit Obligations, Plan Assets, and Funding Status (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 29, 2018	Jan. 02, 2021	Dec. 28, 2019
Amounts Recognized in Balance Sheet
Other Assets		$ 324	$ 241
Other liabilities		(769)	(705)
Pension
Change in Benefit Obligation [Roll Forward]
Actuarial (gain) loss		184
Europe | Project K | Pension
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	$ 30
Global plans | Pension
Change in Benefit Obligation [Roll Forward]
Beginning of Year		5,654	5,117
Service Cost		37	36
Interest Cost		130	172
Plan participants' contributions		1	1
Plan Amendments		22	3
Actuarial (gain) loss		499	766
Benefits paid		(292)	(458)
Curtailments and special termination benefits		(15)	(13)
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		(453)	0
Foreign Currency Adjustments		92	30
End of Year		5,675	5,654
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value, Beginning of Year		5,170	4,677
Actual Return on Plan Assets		656	874
Employer Contributions		8	10
Plan participants' contributions		1	1
Benefits Paid, Plan Assets		(269)	(426)
Settlements		(453)	0
Other		(8)	0
Currency translation		106	34
Fair Value, End of Year		5,211	5,170
Funded Status		(464)	(484)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss)
Prior Service Cost		51	37
Net Amount Recognized		51	37
Amounts Recognized in Balance Sheet
Other Assets		324	241
Other Current Liabilities		(19)	(20)
Other liabilities		(769)	(705)
Net Amount Recognized		(464)	(484)
Defined Benefit Plan, Accumulated Benefit Obligation		$ 5,600	$ 5,600