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Equity Method Investments - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 29, 2026	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Jan. 30, 2026	Dec. 31, 2025
Schedule of Equity Method Investments [Line Items]
Equity method investments		$ 175		$ 175			$ 111
Cash distributions received from equity method investments		4	$ 4	11	$ 11
Equity Method Investee
Schedule of Equity Method Investments [Line Items]
Accounts receivable from equity method investments		36		36			$ 41
Related Party \| TH International Limited (Tims China) \| Convertible Notes Payable Due September 30, 2029
Schedule of Equity Method Investments [Line Items]
Debt instrument, face amount		88		88
Related Party \| TH International Limited (Tims China) \| Convertible Notes Payable Due September 30, 2029 \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Debt instrument, incremental amount issued	$ 15
TH
Schedule of Equity Method Investments [Line Items]
Quoted market price		$ 2		$ 2
TH \| United States
Schedule of Equity Method Investments [Line Items]
Ownership (as a percent)		4.10%		4.10%
Wendy's Company TIMWEN Partnership \| CANADA
Schedule of Equity Method Investments [Line Items]
Ownership (as a percent)		50.00%		50.00%
Burger King China JV
Schedule of Equity Method Investments [Line Items]
Equity method investments						$ 66
TH \| Wendy's Company TIMWEN Partnership
Schedule of Equity Method Investments [Line Items]
Cash distributions received from equity method investments		$ 4	4	$ 11	11
Rent expense		$ 5	$ 6	$ 15	$ 16