Reconciliation of Wendy's International Segment Operating Profit (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2025	Dec. 29, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 2,176,891	$ 2,246,492	$ 2,181,578
Cost of sales	791,724	783,211	794,493
Advertising funds expense	422,552	478,136	428,003
General and administrative	252,679	255,208	249,964
Operating profit	343,452	371,359	381,984
Advertising surplus (deficit)	2,816	2,702	4,344
Operating Segments
Segment Reporting Information [Line Items]
Operating profit	642,580	677,809	667,540
Wendy's International | Operating Segments
Segment Reporting Information [Line Items]
Revenues	152,961	144,690	130,548
Cost of sales	30,307	27,946	27,343
Advertising funds expense	40,896	39,330	35,604
General and administrative	29,680	26,048	26,226
Other segment items	8,944	8,098	5,671
Operating profit	43,134	43,268	35,704
Advertising fund expense	713	1,919	2,401
Advertising surplus (deficit)	$ (2,570)	$ (827)	$ (950)