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Interest accrued Unrecognized Tax Benefits, Interest on Income Taxes Accrued Other Adjustments to Additional Paid in Capital, Other Trade receivables Trade Accounts Receivable Gross The gross amount of trade accounts receivable. 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[Abstract] Net income attributable to PepsiCo per common share Restructuring Charges, Per Share Amount Restructuring Charges, Per Share Amount Document Annual Report Document Annual Report Exercisable Aggregate Intrinsic Value, at December 26, 2020 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Income tax benefits recognized in earnings related to share-based compensation Share-based Payment Arrangement, Expense, Tax Benefit Deferred Income Taxes [Axis] Deferred Income Taxes [Axis] Deferred Income Taxes [Axis] Position [Axis] Position [Axis] Retirement Benefits [Abstract] Retirement Benefits [Abstract] Other Significant Accounting Policies [Policy Text Block] Other Significant Accounting Policies [Policy Text Block] Other Significant Accounting Policies [Policy Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Summary of Income Tax Contingencies [Table Text Block] Summary 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Commercial paper - STI [Member] Commercial paper - STI Acquisitions And Divestitures To Noncontrolling Interest Acquisitions And Divestitures To Noncontrolling Interest Acquisitions and divestitures to noncontrolling interest Common stock, par value 1-2/3 cents per share Common stock, par value 1-2/3 cents per share [Member] Common stock, par value 1-2/3 cents per share [Member] Schedule Of Plan Assets Measured At Fair Value Table Text Block Schedule Of Plan Assets Measured At Fair Value Table Text Block Schedule Of Plan Assets Measured At Fair Value Table Text Block Current Fiscal Year End Date Current Fiscal Year End Date Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] International Audit International Audit International Audit Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax Disaggregation of Net Revenue - Beverages Disaggregation of Net Revenue - Beverages Disaggregation of Net Revenue - Beverages Vital Pharmaceutical, Inc. Termination Notice Vital Pharmaceutical, Inc. Termination Notice Vital Pharmaceutical, Inc. Termination Notice Debt Securities, Held-to-maturity Debt Securities, Held-to-maturity Fair Value, Inputs, Level 3, estimated range of probabilities of acceleration, low [Member] Fair Value, Inputs, Level 3, estimated range of probabilities of acceleration, low [Member] Fair Value, Inputs, Level 3, estimated range of probabilities of acceleration, low Amortization and settlement recognition Components Of Decrease Increase In Net Loss Employee Related Assumption Changes Components of decrease increase in net loss employee related assumption changes Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Notes Due 2032 Notes Due 2032 [Member] Notes Due 2032 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Other Allowance For Doubtful Accounts Other Other net activity recorded against the allowance for doubtful accounts in the current reporting period. Business Combination, Contingent Consideration, Asset Business Combination, Contingent Consideration, Asset Duration of contingent consideration arrangement Duration of contingent consideration arrangement Duration of contingent consideration arrangement Revenue, Net Revenue, Net [Member] Revenue, Net [Member] Derivatives Not Designated As Hedging Instruments Liabilities [Member] Derivatives Not Designated As Hedging Instruments Liabilities [Member] Derivatives Not Designated As Hedging Instruments Liabilities [Member] Zero Point Eight Seven Five Percent Notes Due 2039 [Member] Zero Point Eight Seven Five Percent Notes Due 2039 [Member] Zero Point Eight Seven Five Percent Notes Due 2039 [Member] [Member] Property, Plant and Equipment, Impairment Property, Plant and Equipment, Impairment [Policy Text Block] Cash payments reported on the cash flow statement in pension and retiree medical contributions Cash payments reported on the cash flow statement in pension and retiree medical contributions Cash payments reported on the cash flow statement in pension and retiree medical contributions U.S. Federal statutory tax rate Effective Income Tax Rate Reconciliation, Percent [Abstract] Plan to Date through 12/26/2020 Restructuring and Related Cost, Cost Incurred to Date Notes Due 2031 [Member] Notes Due 2031 [Member] Notes Due 2031 [Member] SOUTH AFRICA SOUTH AFRICA Share Based Compensation Percentage Allocation by Division [Table Text Block] Share Based Compensation Percentage Allocation by Division [Table Text Block] [Table Text Block] for Share Based Compensation Percentage Allocation by Division [Table] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets Cumulative Effect of Accounting Changes in Period of Adoption Cumulative Effect of Accounting Changes in Period of Adoption Other Comprehensive Income, Other, Before Tax Other Comprehensive Income, Other, Before Tax The change in other comprehensive income during the reporting period, before tax, for an item that is not separately disclosed. 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Shares Weighted Average Number of Shares Outstanding, Basic Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Years 2025 Through 2029 Years 6 Through 10 [Member] Years 6 Through 10 [Member] Ownership [Axis] Ownership [Axis] Cash And Cash Equivalents Cash and Cash Equivalents [Member] Cash Flow Hedges Cash Flow Hedging [Member] Two Point One Five Percent Notes Due 2020 [Member] Two Point One Five Percent Notes Due 2020 [Member] Two Point One Five Percent Notes Due 2020 Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Total gross amount of reserves for income taxes Reserves For Income Taxes Total gross amount of reserves for income taxes Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Settlement/curtailment Defined Benefit Plan, Settlements and Curtailments, Benefit Obligation The amount of increase or decrease in benefit obligation due to settlements and curtailment. undistributed earnings of foreign subsidiaries, post distribution undistributed earnings of foreign subsidiaries, post distribution Undistributed Earnings of Foreign Subsidiaries, Post Distribution Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Amortization and settlement of (losses)/gains Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Experience loss Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Commodity contracts - other Price Risk Cash Flow Hedge Liability, at Fair Value Provision for/(benefit from) income taxes (See Note 5) Provision for income taxes Income Tax Expense (Benefit) Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due in Five Years Cash and cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Acquisitions & Divestitures [Table] Acquisitions & Divestitures [Table] Acquisitions & Divestitures [Table] Capital Units by Class [Axis] Capital Units by Class [Axis] Deferred Tax - Lease liability Deferred Tax - Lease liability Deferred Tax - Lease liability Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Local Phone Number Local Phone Number Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Line of Credit Facility, Average Outstanding Amount Line of Credit Facility, Average Outstanding Amount Total intrinsic value of options exercised (a) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value 2019 Productivity Plan 2019 Productivity Plan [Member] 2019 Productivity Plan [Member] SodaStream Consideration Transferred,, net of cash and cash equivalents acquired SodaStream Consideration Transferred,, net of cash and cash equivalents acquired SodaStream Consideration Transferred,, net of cash and cash equivalents acquired Notes Due 2019 [Member] Notes Due 2019 [Member] Notes Due 2019 [Member] Reductions for tax positions from prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Other Accumulated Other Comprehensive Income Loss Other Accumulated other comprehensive income loss other Stock option exercises, RSUs, PSUs and PEPunits converted Stock Issued During Period, Value, Stock Options Exercised Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Target Award Level Target Award Level [Member] Target Award Level - 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average life Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Share-based Payment Arrangement, Noncash Expense [Abstract] Share-based Payment Arrangement, Noncash Expense [Abstract] Four Point Five Zero Percent Notes Due 2020 [Member] Four Point Five Zero Percent Notes Due 2020 [Member] Four Point Five Zero Percent Notes Due 2020 [Member] Award Type Award Type [Domain] Other current liabilities Liability, Defined Benefit Plan, Current Contribution Type [Axis] Contribution Type [Axis] Contribution Type [Axis] Corporate Debt Securities [Member] Corporate Bonds Corporate Debt Securities [Member] New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification (Pre-Tax) New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification (Pre-Tax) New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification (Pre-Tax) Exercisable at December 26, 2020 - average price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Derivative, Net Liability Position, Aggregate Fair Value Derivative, Net Liability Position, Aggregate Fair Value OCI, before Reclassifications, before Tax, Attributable to Parent OCI, before Reclassifications, before Tax, Attributable to Parent Other Commitment Other Commitment Discretionary Defined Benefit Plan, Contributions by Employer, Discretionary Defined Benefit Plan, Contributions by Employer, Discretionary Charges Related to Novel Coronavirus (COVID-19) Impact - Other Charges Related to Novel Coronavirus (COVID-19) Impact - Other Charges Related to Novel Coronavirus (COVID-19) Impact - Other Derivatives designated as hedging instruments, Assets, Total Cash Flow Hedge Derivative Instrument Assets at Fair Value Treasury Stock, Value Treasury Stock, Value Foreign Exchange Forward contracts Foreign Currency Cash Flow Hedge Liability at Fair Value Net Income Attributable To PepsiCo Per Common Share Earnings Per Share [Text Block] Pension Plans, Defined Benefit Pension Plan [Member] Discount rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Retirement Benefits, Description [Abstract] Retirement Benefits, Description [Abstract] Shipping and Handling Cost, Policy [Policy Text Block] Shipping and Handling Cost, Policy [Policy Text Block] Derivatives Designated As Fair Value Hedging Instruments Assets [Member] Derivatives Designated As Fair Value Hedging Instruments Assets [Member] Derivatives Designated As Fair Value Hedging Instruments Assets [Member] Defined Benefit, Unfunded plans Defined Benefit, Unfunded plans Defined Benefit, Unfunded plans U.S. Federal statutory tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Pension and retiree medical plan contributions Payment for Pension and Other Postretirement Benefits Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Vital Pharmaceuticals, Inc. Distribution Agreement Useful Life Vital Pharmaceuticals, Inc. Distribution Agreement Useful Life Vital Pharmaceuticals, Inc. Distribution Agreement Useful Life Defined Benefit Plan, Average remaining life expectancy of Inactive Plan Participants, Pension Expense Defined Benefit Plan, Average remaining life expectancy of Inactive Plan Participants, Pension Expense Defined Benefit Plan, Average remaining life expectancy of Inactive Plan Participants, Pension Expense Allocated Share-Based Compensation Liability Awards Allocated Share-Based Compensation Liability Awards Allocated Share-Based Compensation Liability Awards Income Tax Contingency [Table] Income Tax Contingency [Table] New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Short-term Investments Short-term Investments