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Net Income Attributable to PepsiCo per Common Share (Out-of-the-money options) (Details) - $ / shares | 12 Months Ended
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Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Earnings Per Share [Abstract] |  |  |
Out-of-the-money options excluded from earnings per share | 0.3 | 0.7 | 0.4
Out-of-the-money options average exercise price | $ 117.55 | $ 109.83 | $ 110.12

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- Definition Weighted-average exercise price of out-of-the-money options excluded from the computation of earnings per share. + References No definition available. + Details
Name: | pep_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAverageExerciseperShareAmount
Namespace Prefix: | pep_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration