Long-Term Debt Other Long-term Debt Disclosure (Details) - Line of Credit [Member] - Wendy's U.S. Advertising Fund [Member] $ in Thousands	3 Months Ended
	Mar. 29, 2026 USD ($)
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 15,000
Debt Instrument, Basis Spread on Variable Rate	2.25%
Line of Credit, Outstanding, Amount	$ 0
First Borrowing
Debt Instrument [Line Items]
Proceeds from Lines of Credit	11,500
Second Borrowing
Debt Instrument [Line Items]
Proceeds from Lines of Credit	3,600
First Repayment
Debt Instrument [Line Items]
Repayments of Lines of Credit	11,500
Second Repayment
Debt Instrument [Line Items]
Repayments of Lines of Credit	$ 3,600