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Summary of Significant Accounting Policies - Schedule of Financial Assets Measured at Fair Value on Recurring Basis (Details) - Recurring - USD ($)
$ in Millions
Sep. 27, 2025
Dec. 28, 2024
Assets    
Cash and cash equivalents $ 48.1 $ 51.0
Money market funds 264.2 72.6
Pension assets 24.3 19.2
Equity securities   1.3
Total assets 338.7 151.6
Liabilities    
Pension benefit obligation 29.4 24.6
Total liabilities 30.6 24.7
Cash Flow Hedges    
Assets    
Derivative instruments 2.1 6.8
Liabilities    
Derivative instruments - cash flow hedges 1.2 0.1
Warrants    
Assets    
Derivative instruments   0.7
Level 1    
Assets    
Cash and cash equivalents 48.1 51.0
Money market funds 264.2 72.6
Pension assets 17.8 14.1
Equity securities   1.3
Total assets 332.2 146.5
Liabilities    
Pension benefit obligation 29.4 24.6
Total liabilities 30.6 24.7
Level 1 | Cash Flow Hedges    
Assets    
Derivative instruments 2.1 6.8
Liabilities    
Derivative instruments - cash flow hedges 1.2 0.1
Level 1 | Warrants    
Assets    
Derivative instruments   0.7
Level 2    
Assets    
Cash and cash equivalents 0.0 0.0
Money market funds 0.0 0.0
Pension assets 6.5 5.1
Equity securities   0.0
Total assets 6.5 5.1
Liabilities    
Pension benefit obligation 0.0 0.0
Total liabilities 0.0 0.0
Level 2 | Cash Flow Hedges    
Assets    
Derivative instruments 0.0 0.0
Liabilities    
Derivative instruments - cash flow hedges 0.0 0.0
Level 2 | Warrants    
Assets    
Derivative instruments   0.0
Level 3    
Assets    
Cash and cash equivalents 0.0 0.0
Money market funds 0.0 0.0
Pension assets 0.0 0.0
Equity securities   0.0
Total assets 0.0 0.0
Liabilities    
Pension benefit obligation 0.0 0.0
Total liabilities 0.0 0.0
Level 3 | Cash Flow Hedges    
Assets    
Derivative instruments 0.0 0.0
Liabilities    
Derivative instruments - cash flow hedges $ 0.0 0.0
Level 3 | Warrants    
Assets    
Derivative instruments   $ 0.0