Reportable Segments - Summary of Segment Data (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2024	Dec. 29, 2023	Dec. 30, 2022
Revenues:
Total revenues	$ 2,097.6	$ 1,734.5	$ 2,374.3
Cost of revenues:
Total segment cost of revenues	1,741.3	1,457.2	1,909.3
Operating expenses:
Research and development	28.3	28.3	28.5
Sales and marketing	57.3	51.8	54.4
General and administrative	179.5	162.0	184.3
Total operating expenses	265.1	242.1	344.6
Segment operating profit:
Total segment operating profit	91.2	35.2	120.4
Interest income	4.8	4.1	0.9
Interest expense	(46.5)	(48.8)	(33.9)
Other income (expense), net	17.7	(1.8)	0.9
Income (loss) before provision for income taxes	67.2	(11.3)	88.3
Expenditures for segment property, plant and equipment
Total expenditures for segment assets	63.5	75.8	100.1
Depreciation and amortization
Total depreciation and amortization	76.1	61.7	68.4
ASSETS
Total segment assets	1,919.9	1,867.7
Product
Revenues:
Total revenues	1,853.7	1,501.6	2,074.7
Cost of revenues:
Total segment cost of revenues	1,569.7	1,290.5	1,712.3
Services
Revenues:
Total revenues	243.9	232.9	299.6
Cost of revenues:
Total segment cost of revenues	171.6	166.7	197.0
Operating Segments
Segment operating profit:
Total segment operating profit	91.2	35.2	120.4
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Segment operating profit:
Interest income	4.8	4.1	0.9
Interest expense	46.5	48.8	33.9
Other income (expense), net	17.7	(1.8)	0.9
Products
Operating expenses:
Total operating expenses	204.6	181.2	271.9
Products | Operating Segments
Revenues:
Total revenues	1,853.7	1,501.6	2,074.7
Cost of revenues:
Total segment cost of revenues	1,569.7	1,290.5	1,712.3
Operating expenses:
Research and development	18.8	17.8	17.6
Sales and marketing	46.7	41.4	43.9
General and administrative	139.1	122.0	210.4
Segment operating profit:
Total segment operating profit	79.4	29.9	90.4
Expenditures for segment property, plant and equipment
Total expenditures for segment assets	40.4	62.4	67.8
Depreciation and amortization
Total depreciation and amortization	51.3	36.4	36.3
ASSETS
Total segment assets	1,657.0	1,617.5
Services
Operating expenses:
Total operating expenses	60.5	60.9	72.7
Services | Operating Segments
Revenues:
Total revenues	243.9	232.9	299.6
Cost of revenues:
Total segment cost of revenues	171.6	166.7	197.0
Operating expenses:
Research and development	9.5	10.5	10.9
Sales and marketing	10.6	10.4	10.5
General and administrative	40.4	40.0	51.3
Segment operating profit:
Total segment operating profit	11.8	5.3	30.0
Expenditures for segment property, plant and equipment
Total expenditures for segment assets	23.1	13.4	32.3
Depreciation and amortization
Total depreciation and amortization	24.8	25.3	$ 32.1
ASSETS
Total segment assets	$ 262.9	$ 250.2