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Long-Term Debt Other Long-term Debt Disclosure (Details) $ in Thousands, $ in Thousands				2 Months Ended	3 Months Ended			12 Months Ended
	Jul. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2020 CAD ($)	Mar. 01, 2023 USD ($)	Jul. 04, 2021 USD ($)	Apr. 04, 2021 CAD ($)	Jan. 03, 2021 CAD ($)	Jan. 01, 2023 USD ($)	Jan. 02, 2022 USD ($)	Jan. 03, 2021 USD ($)	Jan. 26, 2023 USD ($)	Jan. 01, 2023 CAD ($)	Dec. 29, 2019 USD ($)
Debt Instrument
Letters of Credit Outstanding, Amount								$ 28,622
Restricted cash								35,203	$ 27,535	$ 33,973
Loss on early extinguishment of debt								0	17,917	0
Interest Expense								122,319	$ 109,185	117,737
Series 2022-1 Class A-2-I Notes
Debt Instrument
Debt Instrument, Face Amount								$ 100,000
Debt Instrument, Interest Rate, Effective Percentage								4.70%				4.70%
Debt Instrument, Interest Rate, Stated Percentage								4.236%				4.236%
Series 2022-1 Class A-2-II Notes
Debt Instrument
Debt Instrument, Face Amount								$ 400,000
Debt Instrument, Interest Rate, Effective Percentage								4.70%				4.70%
Debt Instrument, Interest Rate, Stated Percentage								4.535%				4.535%
Series 2021-1 Class A-2-I Notes
Debt Instrument
Debt Instrument, Face Amount								$ 450,000
Debt Instrument, Interest Rate, Effective Percentage								2.60%				2.60%
Debt Instrument, Interest Rate, Stated Percentage								2.37%	2.37%			2.37%
Series 2021-1 Class A-2-II Notes
Debt Instrument
Debt Instrument, Face Amount								$ 650,000
Debt Instrument, Interest Rate, Effective Percentage								2.90%				2.90%
Debt Instrument, Interest Rate, Stated Percentage								2.775%	2.775%			2.775%
Series 2019-1 Class A-2-I Notes
Debt Instrument
Debt Instrument, Face Amount								$ 400,000
Debt Instrument, Interest Rate, Effective Percentage								4.00%				4.00%
Debt Instrument, Interest Rate, Stated Percentage								3.783%	3.783%			3.783%
Series 2019-1 Class A-2-II Notes
Debt Instrument
Debt Instrument, Face Amount								$ 450,000
Debt Instrument, Interest Rate, Effective Percentage								4.20%				4.20%
Debt Instrument, Interest Rate, Stated Percentage								4.08%	4.08%			4.08%
Series 2018-1 Class A-2-II Notes
Debt Instrument
Debt Instrument, Face Amount								$ 475,000
Debt Instrument, Interest Rate, Effective Percentage								4.10%				4.10%
Debt Instrument, Interest Rate, Stated Percentage								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
Line of Credit, Outstanding, Amount								$ 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								$ 28,388
Series 2019-1 Class A-1 Notes \| Line of Credit
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity									$ 150,000
Proceeds from Lines of Credit		$ 120,000
Repayments of Lines of Credit	$ 120,000
Series 2020-1 Class A-1 Notes
Debt Instrument
Debt Issuance Costs, Gross										2,122
Series 2020-1 Class A-1 Notes \| Line of Credit
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity									100,000
Series 2021-1 Senior Notes
Debt Instrument
Loss on early extinguishment of debt					$ 17,917
Specified make-whole payment					9,632
Write off of Deferred Debt Issuance Cost					$ 8,285
Debt Issuance Costs, Gross									$ 20,873
Series 2022-1 Senior Notes
Debt Instrument
Debt Issuance Costs, Gross								10,232
7% debentures
Debt Instrument
Debt Instrument, Face Amount								$ 100,000
Debt Instrument, Interest Rate, Effective Percentage								8.60%				8.60%
Debt Instrument, Interest Rate, Stated Percentage								7.00%	7.00%			7.00%	7.00%
Debt Instrument, Repurchased Face Amount													$ 10,000
Debt Instrument, Repurchase Amount													10,550
7% debentures \| Premium
Debt Instrument
Debt Instrument, Repurchase Amount													500
7% debentures \| Transaction Fees
Debt Instrument
Debt Instrument, Repurchase Amount													$ 50
7% debentures \| Subsequent Event
Debt Instrument
Loss on early extinguishment of debt				$ 1,009
Debt Instrument, Repurchased Face Amount											$ 25,000
Restricted Cash Held for Principal Interest and Fees
Debt Instrument
Restricted cash								$ 34,850	$ 27,188
Canadian Subsidiary \| Line of Credit
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity												$ 6,000
Line of Credit, Outstanding, Amount												$ 0
Proceeds from Lines of Credit			$ 5,500
Repayments of Lines of Credit						$ 2,500	$ 3,000
Wendy's U.S. Advertising Fund \| Line of Credit
Debt Instrument
Line of Credit Facility, Maximum Borrowing Capacity								25,000
Line of Credit, Outstanding, Amount								0
Proceeds from Lines of Credit								0	0	29,397
Repayments of Lines of Credit								$ 0	0	29,397
Debt Instrument, Basis Spread on Variable Rate								2.15%
Corporate Debt Securities
Debt Instrument
Interest Expense								$ 110,751	$ 98,356	$ 106,116