Balance Sheet Details - Accounts Receivable and Unbilled Receivables (Details) - USD ($) $ in Millions	Dec. 28, 2025	Dec. 29, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total current accounts receivable	$ 458.4	$ 324.9
Allowance for doubtful accounts	(1.0)	(1.1)
Total accounts receivable and unbilled receivables, net	457.4	323.8
U.S. Government
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total U.S. Government contract receivables	113.7	72.8
Billed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total current accounts receivable	165.9	118.5
Billed | U.S. Government
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total U.S. Government contract receivables	25.4	11.6
Unbilled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total current accounts receivable	292.5	206.4
Unbilled | U.S. Government
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total U.S. Government contract receivables	$ 88.3	$ 61.2