Long-Term Debt Other Long-term Debt Disclosure (Details) - Line of Credit [Member] - Wendy's U.S. Advertising Fund [Member] - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 28, 2025	Jun. 29, 2025	Mar. 30, 2025	Sep. 28, 2025
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 15,000			$ 15,000
Debt Instrument, Basis Spread on Variable Rate				2.25%
Proceeds from Lines of Credit	0	$ 8,500	$ 15,000
Repayments of Lines of Credit	0		$ 8,500
Line of Credit, Outstanding, Amount	$ 15,000			$ 15,000