Reconciliation of Wendy's International Segment Operating Profit (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Revenues	$ 523,472	$ 534,753
Cost of sales	188,169	192,113
Advertising funds expense	101,528	107,374
General and administrative	68,204	63,757
Segment profit	83,126	81,156
Advertising deficit	(144)	(207)
Operating Segments
Segment Reporting Information [Line Items]
Segment profit	155,097	160,575
Wendy's International | Operating Segments
Segment Reporting Information [Line Items]
Revenues	34,721	32,815
Cost of sales	6,932	6,180
Advertising funds expense	9,912	8,556
General and administrative	6,437	5,941
Other segment items	1,996	1,448
Segment profit	9,444	10,690
Advertising fund expense	159	162
Advertising deficit	$ 1,153	$ 150