Other Intangible Assets - Schedule of Other Intangible Assets Roll Forward (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 28, 2025	Dec. 28, 2025	Dec. 29, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Roll Forward]
Beginning of period		$ 45.5
Amortization expense		(11.9)	$ (10.8)	$ (10.9)
End of period	$ 32.6	32.6	45.5
Intangible Assets, Net (Excluding Goodwill) [Roll Forward]
Beginning of period		575.7	586.0
Impairment		$ (31.8)
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration]		Closure and impairment charges
Amortization expense		$ (11.9)	(10.8)	(10.9)
Additions		2.1	0.8
Disposition			(0.3)
End of period	534.1	534.1	575.7	586.0
Other
Finite-Lived Intangible Assets [Roll Forward]
Amortization expense		(1.1)	(0.1)
Intangible Assets, Net (Excluding Goodwill) [Roll Forward]
Beginning of period		8.2	7.8
Impairment		$ (2.8)
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration]		Closure and impairment charges
Amortization expense		$ (1.1)	(0.1)
Additions		2.1	0.8
Disposition			(0.3)
End of period	6.3	6.3	8.2	7.8
Franchising Rights
Finite-Lived Intangible Assets [Roll Forward]
Beginning of period		42.3	53.0
Impairment		$ 0.0
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]		Closure and impairment charges
Amortization expense		$ (10.7)	(10.7)
Additions		0.0	0.0
Disposition			0.0
End of period	31.6	$ 31.6	42.3	53.0
Intangible Assets, Net (Excluding Goodwill) [Roll Forward]
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration]		Closure and impairment charges
Amortization expense		$ (10.7)	(10.7)
Tradenames
Indefinite-lived Intangible Assets [Roll Forward]
Beginning of period		525.2	525.2
Impairment	(29.0)	$ (29.0)	0.0
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]		Closure and impairment charges
Additions		$ 0.0	0.0
Disposition			0.0
End of period	$ 496.2	$ 496.2	$ 525.2	$ 525.2
Intangible Assets, Net (Excluding Goodwill) [Roll Forward]
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration]		Closure and impairment charges