Income Taxes - Components of Net Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 25, 2020
Net non-current deferred tax asset:
Valuation allowance	$ (30.9)
Total deferred tax assets	37.6	$ 23.5
Non-current deferred tax liability:
Undistributed earnings	(0.5)	(0.5)
Operating lease right-of-use assets	(10.8)	(8.5)
Depreciation	(8.7)	(5.0)
Intangibles	(19.7)	(6.7)
Goodwill	(15.2)	(12.9)
Total deferred tax liabilities	(54.9)	(33.6)
Net deferred tax liabilities	(17.3)	(10.1)
Deferred Tax Assets Noncurrent [Member]
Net non-current deferred tax asset:
Inventory valuation and basis difference	7.4	3.9
State taxes		0.2
Stock compensation	1.8	1.7
Operating lease liabilities	11.4	10.0
Interest expense limitation	13.0	6.8
Intangibles	12.9	12.6
Net operating losses	11.2	6.4
Tax credits	4.2	2.6
Other timing differences	6.6	4.9
Deferred tax assets, gross non-current	68.5	49.1
Valuation allowance	$ (30.9)	$ (25.6)