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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]
Investment in subsidiaries		$ 175		$ 175			$ 111
Cash distributions		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 \| Tims China \| Convertible Notes Payable Due September 30, 2029
Schedule of Equity Method Investments [Line Items]
Aggregate principal amount of debt issued		88		88
Related Party \| Tims China \| Convertible Notes Payable Due September 30, 2029 \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Incremental amount	$ 15
BK China JV
Schedule of Equity Method Investments [Line Items]
Investment in subsidiaries						$ 66
Tims China
Schedule of Equity Method Investments [Line Items]
Quoted market price		$ 2		$ 2
Tims China \| United States
Schedule of Equity Method Investments [Line Items]
Ownership percentage (in percentage)		4.10%		4.10%
Wendy's Company TIMWEN Partnership
Schedule of Equity Method Investments [Line Items]
Cash distributions		$ 4	4	$ 11	11
Rent expense		$ 5	$ 6	$ 15	$ 16
Wendy's Company TIMWEN Partnership \| Canada
Schedule of Equity Method Investments [Line Items]
Ownership percentage (in percentage)		50.00%		50.00%