Income Taxes - Components of Net Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Millions	Dec. 27, 2024	Dec. 29, 2023
Deferred tax assets:
Interest expense limitation	$ 39.5	$ 29.4
Operating lease liabilities	28.3	27.3
Tax loss carryforwards	40.4	19.9
Capitalized research and development costs	12.5	10.9
Inventory valuation and basis difference	7.4	5.3
Accruals	4.6	4.4
Tax credits	6.5	7.3
Other timing differences	8.2	7.1
Deferred tax assets, gross non-current	147.4	111.6
Valuation allowance	(96.3)	(57.9)
Total deferred tax assets	51.1	53.7
Deferred tax liabilities:
Goodwill	(21.7)	(19.7)
Operating lease right-of-use assets	(27.2)	(26.1)
Intangibles	(9.6)	(12.9)
Depreciation	(3.6)	(9.0)
Other	(2.0)	(1.9)
Total deferred tax liabilities	(64.1)	(69.6)
Net deferred tax liabilities	$ (13.0)	$ (15.9)