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Our Significant Accounting Policies (Concentration of Credit Risk) (Details) (Customer Concentration Risk, Wal-Mart, Revenue, Net)
12 Months Ended
Dec. 27, 2014
Customer Concentration Risk | Wal-Mart | Revenue, Net
 
Concentration Risk [Line Items]  
Concentration risk, percentage 12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= pep_RevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= pep_WalMartMember