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Pension and Retiree Medical Benefits Narrative (Details) - USD ($) $ in Millions | 6 Months Ended
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Jun. 16, 2018 | Jun. 17, 2017
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Contributions by Employer, Discretionary | $ 1,400 |
International [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Contributions by Employer, Discretionary | $ 17 | $ 6

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

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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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |