Balance Sheet Information - Property, Plant and Equipment, Net (Detail) - USD ($) $ in Millions	Dec. 27, 2024	Dec. 29, 2023
Property, Plant and Equipment [Line Items]
Equipment and leasehold improvements net excluding construction in progress	$ 502.0	$ 458.1
Accumulated depreciation	(214.0)	(170.3)
Construction in progress	37.9	40.5
Total	325.9	328.3
Land
Property, Plant and Equipment [Line Items]
Equipment and leasehold improvements, gross	$ 5.7	5.6
Buildings
Property, Plant and Equipment [Line Items]
Useful Life (In years)	50 years
Equipment and leasehold improvements, gross	$ 52.2	57.1
Leasehold improvements
Property, Plant and Equipment [Line Items]
Equipment and leasehold improvements, gross	138.7	110.8
Machinery and equipment
Property, Plant and Equipment [Line Items]
Equipment and leasehold improvements, gross	$ 222.4	207.4
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful Life (In years)	5 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful Life (In years)	10 years
Computer equipment and software
Property, Plant and Equipment [Line Items]
Equipment and leasehold improvements, gross	$ 78.2	72.2
Computer equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Useful Life (In years)	3 years
Computer equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Useful Life (In years)	10 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Useful Life (In years)	5 years
Equipment and leasehold improvements, gross	$ 4.8	$ 5.0