Long-Term Debt Other Long-term Debt Disclosure (Details) $ in Thousands, $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 28, 2025 USD ($)	Jun. 29, 2025 USD ($)	Mar. 30, 2025 USD ($)	Dec. 28, 2025 USD ($)	Dec. 29, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 28, 2025 CAD ($)	Dec. 29, 2019 USD ($)
Debt Instrument
(Loss) gain on early extinguishment of debt, net				$ (642)	$ 0	$ 2,283
Letters of Credit Outstanding, Amount	$ 28,738			28,738
Restricted cash	39,207			39,207	$ 34,481	35,848
Series 2025-1 Class A-2-I Notes
Debt Instrument
Debt Instrument, Face Amount	450,000			450,000
(Loss) gain on early extinguishment of debt, net				(642)
Debt Issuance Costs, Gross	$ 9,671			$ 9,671
Debt Instrument, Interest Rate, Effective Percentage	5.70%			5.70%			5.70%
Debt Instrument, Interest Rate, Stated Percentage	5.422%			5.422%	5.422%		5.422%
Series 2022-1 Class A-2-I Notes
Debt Instrument
Debt Instrument, Face Amount	$ 100,000			$ 100,000
Debt Instrument, Interest Rate, Effective Percentage	4.70%			4.70%			4.70%
Debt Instrument, Interest Rate, Stated Percentage	4.236%			4.236%	4.236%		4.236%
Series 2022-1 Class A-2-II Notes
Debt Instrument
Debt Instrument, Face Amount	$ 400,000			$ 400,000
Debt Instrument, Interest Rate, Effective Percentage	4.70%			4.70%			4.70%
Debt Instrument, Interest Rate, Stated Percentage	4.535%			4.535%	4.535%		4.535%
Series 2021-1 Class A-2-I Notes
Debt Instrument
Debt Instrument, Face Amount	$ 450,000			$ 450,000
Debt Instrument, Interest Rate, Effective Percentage	2.60%			2.60%			2.60%
Debt Instrument, Interest Rate, Stated Percentage	2.37%			2.37%	2.37%		2.37%
Series 2021-1 Class A-2-II Notes
Debt Instrument
Debt Instrument, Face Amount	$ 650,000			$ 650,000
Debt Instrument, Interest Rate, Effective Percentage	2.90%			2.90%			2.90%
Debt Instrument, Interest Rate, Stated Percentage	2.775%			2.775%	2.775%		2.775%
Series 2019-1 Class A-2-II Notes
Debt Instrument
Debt Instrument, Face Amount	$ 450,000			$ 450,000
Debt Instrument, Interest Rate, Effective Percentage	4.30%			4.30%			4.30%
Debt Instrument, Interest Rate, Stated Percentage	4.08%			4.08%	4.08%		4.08%
Series 2018-1 Class A-2-II Notes
Debt Instrument
Debt Instrument, Face Amount	$ 475,000			$ 475,000
Debt Instrument, Interest Rate, Effective Percentage	4.10%			4.10%			4.10%
Debt Instrument, Interest Rate, Stated Percentage	3.884%			3.884%	3.884%		3.884%
Series 2021-1 Class A-1 Notes | Line of Credit
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity	$ 300,000			$ 300,000
Line of Credit, Outstanding, Amount	0			$ 0
Series 2021-1 Class A-1 Notes | Line of Credit | Minimum
Debt Instrument
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.40%
Series 2021-1 Class A-1 Notes | Line of Credit | Maximum
Debt Instrument
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.75%
Series 2021-1 Class A-1 Notes | Letter of Credit
Debt Instrument
Letters of Credit Outstanding, Amount	28,525			$ 28,525
Class A-2 Senior Secured Notes
Debt Instrument
Debt Instrument, Repurchased Face Amount						29,171
Debt Instrument, Repurchase Amount						24,935
(Loss) gain on early extinguishment of debt, net						3,914
7% debentures
Debt Instrument
Debt Instrument, Face Amount	100,000			100,000
Debt Instrument, Repurchased Face Amount	$ 49,570			$ 49,570		40,430		$ 10,000
Debt Instrument, Repurchase Amount						40,517		$ 10,550
(Loss) gain on early extinguishment of debt, net						$ (1,631)
Debt Instrument, Interest Rate, Effective Percentage	8.60%			8.60%			8.60%
Debt Instrument, Interest Rate, Stated Percentage	7.00%			7.00%		7.00%	7.00%	7.00%
7% debentures | Premium
Debt Instrument
Debt Instrument, Repurchase Amount								$ 500
7% debentures | Transaction Fees
Debt Instrument
Debt Instrument, Repurchase Amount								$ 50
Restricted Cash Held for Principal Interest and Fees
Debt Instrument
Restricted cash	$ 38,800			$ 38,800	$ 34,089
Canadian Subsidiary | Line of Credit
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity							$ 6,000
Line of Credit, Outstanding, Amount							$ 0
Wendy's U.S. Advertising Fund | Line of Credit
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity	15,000			15,000
Proceeds from Lines of Credit	2,000	$ 8,500	$ 15,000
Repayments of Lines of Credit			$ 8,500
Line of Credit, Outstanding, Amount	0			$ 0
Debt Instrument, Basis Spread on Variable Rate				2.25%
Wendy's U.S. Advertising Fund | Line of Credit | First Repayment
Debt Instrument
Repayments of Lines of Credit	5,000
Wendy's U.S. Advertising Fund | Line of Credit | Second Repayment
Debt Instrument
Repayments of Lines of Credit	$ 12,000
Corporate Debt Securities
Debt Instrument
Interest Expense, Operating and Nonoperating				$ 109,523	$ 110,038	$ 112,659