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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. 28, 2024 | Sep. 30, 2023 | Sep. 24, 2022 | Sep. 25, 2021
Income Taxes [Line Items] |  |  |  |  |
Income tax benefit |  | $ (75.6) | $ (220.1) | $ (286.2) |
Diluted (in dollars per share) |  | $ 3.32 | $ 1.83 | $ 5.13 |
Valuation allowance, increase (decrease) |  | $ (28.4) |  |  |
Net operating losses |  | 134.2 |  |  |
State net operating loss expected to be expired unutilized |  | 107.7 |  |  |
Foreign net operating loss expected to be expired unutilized |  | 208.6 |  |  |
Unrecognized tax benefit that would impact effective tax rate |  | 213.9 | $ 240.5 | $ 231.6 |
Interest on income taxes |  | 20.3 | 15.8 | 0.7 |
Interest accrued on unrecognized tax benefits |  | 50.4 | 30.1 |  |
Increase to income tax expense adoption of ASU 2016-16 |  |  | 77.2 |  |
Decrease in deferred tax liabilities due to ASU 2016-16 |  |  | 90.8 |  |
Increase to Net Income resulted from adoption of ASU 2016-16 |  |  | $ 13.6 |  |
Increase to Earnings per Share resulted from adoption of ASU 2016-16 |  |  | $ 0.05 |  |
state loss carryforward expected to unutilize |  | 438.9 |  |  |
Gross state loss carryforwards |  | 438.9 |  |  |
Gross foreign loss carryforwards |  | 134.2 |  |  |
Unrecognized Tax Benefits |  | 273.2 | $ 256.5 | $ 247.6 | $ 212.8
Change in gross unrecognized tax benefits |  | 16.7 | 8.9 |  |
Net Operating Losses Carryforwards |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Amount with unlimited carry forward periods |  | 97.5 |  |  |
Tax Credit Carryforward |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Amount with unlimited carry forward periods |  | 4.2 |  |  |
Maximum |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Decrease in unrecognized tax benefits is reasonably possible |  | 8.3 |  |  |
Domestic Tax Authority |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Net operating losses |  | 22.5 |  |  |
Credit carry forwards |  | 4.6 |  |  |
State and Local Jurisdiction |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Net operating losses |  | 172.1 |  |  |
Credit carry forwards |  | 2.1 |  |  |
Foreign Tax Authority |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Income tax benefit | $ 107.2 |  |  |  |
Net operating losses |  | 275.2 |  |  |
Foreign Tax Authority | Costa Rica |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Income tax savings |  | $ 79.8 | $ 45.5 |  |
Diluted (in dollars per share) |  | $ 0.34 | $ 0.18 |  |

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