Goodwill And Other Intangible Assets Schedule of Goodwill and Other Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2025	Dec. 29, 2024	Dec. 31, 2023
Goodwill
Goodwill, gross	$ 783,485	$ 780,865	$ 783,124
Accumulated impairment losses	(9,397)	(9,397)	(9,397)
Goodwill, net	774,088	771,468	773,727
Restaurant acquisitions	1,249
Currency translation adjustment and other	1,371	(2,259)
Wendy's U.S.
Goodwill
Goodwill, gross	621,852	620,603	620,603
Accumulated impairment losses	0	0	0
Goodwill, net	621,852	620,603	620,603
Restaurant acquisitions	1,249
Currency translation adjustment and other	0	0
Wendy's International
Goodwill
Goodwill, gross	39,085	37,714	39,973
Accumulated impairment losses	(9,397)	(9,397)	(9,397)
Goodwill, net	29,688	28,317	30,576
Restaurant acquisitions	0
Currency translation adjustment and other	1,371	(2,259)
Global Real Estate & Development
Goodwill
Goodwill, gross	122,548	122,548	122,548
Accumulated impairment losses	0	0	0
Goodwill, net	122,548	122,548	$ 122,548
Restaurant acquisitions	0
Currency translation adjustment and other	$ 0	$ 0