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Income Taxes - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 30, 2023
Sep. 27, 2025
Sep. 28, 2024
Sep. 30, 2023
Sep. 24, 2022
Income Taxes [Line Items]          
Income tax benefit   $ (115.5) $ (75.6) $ (220.1)  
Diluted (in dollars per share)   $ 2.49 $ 3.32 $ 1.83  
Valuation allowance, increase (decrease)   $ 21.4      
Net operating losses   134.4      
State net operating loss expected to be expired unutilized   147.9      
Foreign net operating loss expected to be expired unutilized   186.8      
Unrecognized tax benefit that would impact effective tax rate   193.1 $ 213.9 $ 240.5  
Interest on income taxes   18.5 20.3 15.8  
Interest accrued on unrecognized tax benefits   68.9 50.4    
state loss carryforward expected to unutilize   10.2      
Gross state loss carryforwards   10.2      
Gross foreign loss carryforwards   134.4      
Unrecognized Tax Benefits   266.4 273.2 256.5 $ 247.6
Change in gross unrecognized tax benefits   (6.8) 16.7    
Net Operating Losses Carryforwards          
Income Taxes [Line Items]          
Amount with unlimited carry forward periods   161.6      
Tax Credit Carryforward          
Income Taxes [Line Items]          
Amount with unlimited carry forward periods   4.7      
Maximum          
Income Taxes [Line Items]          
Decrease in unrecognized tax benefits is reasonably possible   9.8      
Domestic Tax Jurisdiction          
Income Taxes [Line Items]          
Net operating losses   81.0      
Credit carry forwards   4.9      
State and Local Jurisdiction          
Income Taxes [Line Items]          
Net operating losses   215.7      
Credit carry forwards   2.4      
Foreign Tax Jurisdiction          
Income Taxes [Line Items]          
Income tax benefit $ 107.2        
Net operating losses   253.9      
Foreign Tax Jurisdiction | Costa Rica          
Income Taxes [Line Items]          
Income tax savings   $ 79.7 $ 79.8 $ 45.5  
Diluted (in dollars per share)   $ 0.35 $ 0.34 $ 0.18