Restructuring - Summary of Restructuring Related Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2025	Jun. 30, 2024	Jun. 29, 2025	Jun. 30, 2024
Restructuring Cost and Reserve [Line Items]
Total international transformation costs	$ 2,451	$ 6,185	$ 4,631	$ 15,728
International Transformation Plan
Restructuring Cost and Reserve [Line Items]
Total international transformation costs	2,451	6,185	4,631	15,728
Stock-based compensation expense/(forfeitures on unvested awards)	24	(56)	(21)	(76)
Total international transformation costs, inclusive of stock-based award expense/forfeitures	2,475	6,129	4,610	15,652
International Transformation Plan | Professional services and other related costs
Restructuring Cost and Reserve [Line Items]
Total international transformation costs	780	1,355	2,214	2,701
International Transformation Plan | Loss on franchisee notes receivable
Restructuring Cost and Reserve [Line Items]
Total international transformation costs	1,050	1,564	2,161	1,564
International Transformation Plan | Long-lived asset impairment charges
Restructuring Cost and Reserve [Line Items]
Total international transformation costs	801	1,422	801	8,976
International Transformation Plan | Lease terminations and other lease related costs
Restructuring Cost and Reserve [Line Items]
Total international transformation costs	(195)	306	(560)	306
International Transformation Plan | Employee termination costs
Restructuring Cost and Reserve [Line Items]
Total international transformation costs	15	(199)	15	444
International Transformation Plan | Loss on refranchising Company-owned restaurants
Restructuring Cost and Reserve [Line Items]
Total international transformation costs	$ 0	$ 1,737	$ 0	$ 1,737