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Income Taxes (Narrative) (Details) (USD $)
 3 Months Ended 4 Months Ended 12 Months Ended 4 Months Ended
Mar. 24, 2012
Dec. 29, 2012
Dec. 27, 2014
Dec. 28, 2013
Dec. 28, 2013
Income Tax Contingency [Line Items]          
Deferred Tax Liabilities, Compensation and Benefits, Pensions       $ 84,000,000pep_DeferredTaxLiabilitiesCompensationandBenefitsPensions $ 84,000,000pep_DeferredTaxLiabilitiesCompensationandBenefitsPensions
Provision for income taxes   217,000,000pep_Noncashtaxbenefit      
Prescription drug benefit subsidy, income tax benefit 55,000,000pep_PrescriptionDrugBenefitSubsidyIncomeTaxBenefit        
Total gross amount of reserves for income taxes     1,587,000,000pep_ReservesForIncomeTaxes    
Interest accrued     141,000,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued 164,000,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued 164,000,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued
Interest accrued recognized     31,000,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense 36,000,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense  
Operating loss carryforwards     10,400,000,000us-gaap_OperatingLossCarryforwards    
Income tax undistributed international earnings     37,800,000,000us-gaap_UndistributedEarningsOfForeignSubsidiaries    
Expire in 2015          
Income Tax Contingency [Line Items]          
Operating loss carryforwards     100,000,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= pep_Expirein2015Member		    
Expire Between 2016 and 2034 Years          
Income Tax Contingency [Line Items]          
Operating loss carryforwards     9,800,000,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= pep_ExpireBetween2And20YearsMember		    
Carried Forward Indefinitely          
Income Tax Contingency [Line Items]          
Operating loss carryforwards     500,000,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= pep_CarriedForwardIndefinitelyMember		    
Tax Settlement, Years 2003-2009          
Income Tax Contingency [Line Items]          
Income Taxes Paid         758,000,000us-gaap_IncomeTaxesPaid
/ us-gaap_TaxPeriodAxis
= pep_TaxSettlementYears20032009Member
Provision for income taxes         209,000,000pep_Noncashtaxbenefit
/ us-gaap_TaxPeriodAxis
= pep_TaxSettlementYears20032009Member
Open Tax Years          
Income Tax Contingency [Line Items]          
Income Taxes Paid       $ 226,000,000us-gaap_IncomeTaxesPaid
/ us-gaap_TaxPeriodAxis
= pep_OpenTaxYearsMember