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Summary of Significant Accounting Policies Investments (Details)
Dec. 28, 2014
TimWen [Member]  
Schedule of Equity Method Investments [Line Items]  
Equity Method Investment, Ownership Percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= wen_TimwenMember
Arby's Restaurant Group, Inc [Member]  
Schedule of Cost-method Investments [Line Items]  
Proceeds from Divestiture of Business, Percentage of Buyer Stock Received 18.50%wen_ProceedsFromDivestitureOfBusinessPercentageOfBuyerStockReceived
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= wen_ArbysRestaurantGroupIncMember