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Pension and Retiree Medical Benefits Narrative (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 15, 2019 | Jun. 16, 2018
Domestic Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Contributions by Employer, Discretionary | $ 150 | $ 1,400
Foreign Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Contributions by Employer, Discretionary | $ 17 | $ 17

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- Definition Defined Benefit Plan, Contributions by Employer, Discretionary + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |