Pension and Retiree Medical Benefits Narrative (Details) - USD ($) $ in Millions	8 Months Ended
Sep. 05, 2020	Sep. 07, 2019
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer, Discretionary	$ 325	$ 150
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer, Discretionary	$ 14	$ 17

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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