Basis of Presentation - Additional Information (Detail)		3 Months Ended		12 Months Ended
	Mar. 30, 2025	Mar. 29, 2025 USD ($)	Mar. 30, 2024 USD ($)	Mar. 29, 2025 USD ($)	Feb. 01, 2025	Jan. 31, 2025 USD ($)	Jan. 02, 2025 USD ($)	Dec. 28, 2024 USD ($)	Dec. 30, 2023 USD ($)
Basis of Presentation [Line Items]
Operating loss		$ (20,201,000)	$ (269,332,000)
Net loss		(72,585,000)	(347,902,000)
Franchise rights acquired impairments		27,549,000	257,988,000
Revenues		186,571,000	206,548,000
Cash provided by (used for) operating activities		14,998,000	(36,035,000)
Interest payments		13,693,000
Total Deficit		(1,182,923,000)	$ (1,112,299,000)	$ (1,182,923,000)				$ (1,114,372,000)	$ (761,094,000)
Unrestricted cash and cash equivalents		236,346,000		236,346,000				53,024,000
Loan outstanding amount		1,616,341,000		1,616,341,000				1,445,000,000
Line of credit facility, issued but undrawn letters of credit		3,659,000		3,659,000
Foreign Subsidiaries
Basis of Presentation [Line Items]
Unrestricted cash and cash equivalents		39,064,000		39,064,000
Term Loan Facility due April 13, 2028
Basis of Presentation [Line Items]
Loan outstanding amount		945,000,000		945,000,000				945,000,000
Senior Secured Notes due April 15, 2029
Basis of Presentation [Line Items]
Loan outstanding amount		$ 500,000,000		$ 500,000,000				$ 500,000,000
Interest Rate		4.50%		4.50%
Revolving Credit Facility due April 13, 2026
Basis of Presentation [Line Items]
Loan outstanding amount		$ 171,341,000		$ 171,341,000
Employee Termination Benefit Costs
Basis of Presentation [Line Items]
Severance payments		4,545,000
Revolving Credit Facility
Basis of Presentation [Line Items]
Loan outstanding amount		171,341,000		171,341,000		$ 121,341,000	$ 50,000,000
Loan availability for future borrowings		0		0
Interest Rate					7.30%
Line of credit facility, issued but undrawn letters of credit		$ 3,659,000		3,659,000
Minimum outstanding amount to compliance springing maintenance covenant		35.00%
Credit Facility, maximum borrowing capacity		$ 61,250,000		$ 61,250,000
Consolidated first lien leverage ratio		7.37
Revolving Credit Facility | Maximum
Basis of Presentation [Line Items]
Consolidated first lien leverage ratio compliance		5.25		5.25
Revolving Credit Facility | Maximum | Subsequent Event
Basis of Presentation [Line Items]
Consolidated first lien leverage ratio compliance	5.00