Significant Customers (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Dec. 25, 2022
Revenue, Major Customer [Line Items]
Revenue	$ 1,136.3	$ 1,037.1	$ 898.3
KGS
Revenue, Major Customer [Line Items]
Revenue	865.8	824.9	676.6
U.S. Government | KGS
Revenue, Major Customer [Line Items]
Revenue	$ 762.0	$ 712.7	$ 623.7
U.S. Government | KGS | Revenue Benchmark | Customer Concentration Risk
Revenue, Major Customer [Line Items]
Sales to the U.S. Government, percentage of total revenue (percent)	67.00%	69.00%	69.00%