Postemployment Benefits Pension Plans - Amounts Recognized in Balance Sheet (Details) - Pension Plans - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	$ 1,081	$ 999
Other current liabilities	(4)	(4)
Accrued postemployment costs	(89)	(77)
Net asset/(liability) recognized	$ 988	$ 918

Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as current. Excludes other postretirement benefit plan.

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Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as noncurrent. Excludes other postretirement benefit plan.

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Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans.

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