Balance Sheet Details - Accounts Receivable and Unbilled Receivables (Details) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total current accounts receivable	$ 324.9	$ 330.3
Allowance for doubtful accounts	(1.1)	(1.1)
Total accounts receivable and unbilled receivables, net	323.8	329.2
U.S. Government
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total U.S. Government contract receivables	72.8	92.0
Billed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total current accounts receivable	118.5	129.8
Billed | U.S. Government
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total U.S. Government contract receivables	11.6	21.0
Unbilled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total current accounts receivable	206.4	200.5
Unbilled | U.S. Government
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total U.S. Government contract receivables	$ 61.2	$ 71.0