Other Financial Data Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Other expense/(income)	$ 952	$ 168	$ 627
Loss/(gain) on sale of business	420	(15)	0
Other expense/(income)	952	168	627
Increase (decrease) in nonmonetary currency devaluation	(136)	110
Gains/(losses) on sale of business	420	(15)	0
Postretirement Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Curtailments	5	0	177
Non-U.S. Plans \| Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlements	0	1,221
Curtailments	0	1	$ 0
Canadian Salaried and Hourly Plans \| Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Settlements		162
Other expense/(income) \| Cash Flow Hedging \| Designated as hedging instrument \| Cross-currency contracts
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains/(losses) on derivatives, excluded component, reclassified to net income	$ 28	1
South Africa Subsidiary
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Gains/(losses) on sale of business		$ (15)

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Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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