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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 27, 2024 | Dec. 29, 2023 | Sep. 27, 2024
Income Taxes |  |  |
Income tax expense (benefit) | $ 178 | $ (1,105) |
Income tax expense relating to revaluation of deferred tax assets resulting from corporate tax rate decrease in non-U.S. jurisdiction | $ 13 |  |
Income tax benefit associated with a ten-year tax credit obtained by a Swiss subsidiary |  | $ 874 |
Duration of income tax benefit associated with a tax credit obtained by a Swiss subsidiary | 10 years | 10 years | 10 years
Income tax benefit relating to revaluation of deferred tax assets resulting from corporate tax rate increase in Switzerland |  | $ 262 |
Income tax benefit associated with the tax impacts of a legal entity restructuring |  | 118 |
Non-income tax expense related to a legal entity restructuring |  | $ 4 |
Unrecognized income tax benefits, approximate amount that could be resolved in next twelve months | $ 20 |  |

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