Goodwill and Intangible Assets - Details of Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2024	Dec. 29, 2023
Goodwill [Line Items]
Beginning	$ 265.2	$ 248.8
Acquisition of HIS		16.4
HIS Fair value adjustment	0.1
Ending	265.3	265.2
Products
Goodwill [Line Items]
Beginning	191.7	175.3
Acquisition of HIS		16.4
HIS Fair value adjustment	0.1
Ending	191.8	191.7
Services
Goodwill [Line Items]
Beginning	73.5	73.5
Acquisition of HIS		0.0
HIS Fair value adjustment	0.0
Ending	$ 73.5	$ 73.5