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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 29, 2019 | Mar. 30, 2018 | Dec. 29, 2017 | Mar. 29, 2019 | Mar. 30, 2018
Income Taxes |  |  |  |  |
Income tax expense | $ 91 | $ 108 |  | $ 169 | $ 707
Income tax expense related to tax impacts of Tax Cuts and Jobs Act |  |  | $ 567 |  | 567
Income tax expense associated with certain legal entity restructurings and intercompany transactions | 15 |  |  | 15 |
Income tax benefit resulting from lapses of statutes of limitations | 12 | $ 17 |  |  |
Net income tax benefit related to certain legal entity restructurings |  |  |  |  | $ 61
U.S. federal corporate income tax rate |  |  | 21.00% |  |
Income tax benefit related to the reduction in the valuation allowance recorded against certain U.S. federal tax credit carryforwards |  |  | $ 34 |  |
Unrecognized income tax benefits, approximate amount that could be resolved in next twelve months | $ 130 |  |  | $ 130 |
Liabilities sharing percent, entity |  |  |  | 31.00% |
Liabilities sharing percent, Tyco International |  |  |  | 27.00% |
Liabilities sharing percent, Covidien |  |  |  | 42.00% |

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- Definition In connection with the Separation and Distribution Agreement and Tax Sharing Agreement, this is the percentage share for which the entity is responsible for certain contingent liabilities relating to certain guarantee commitments and indemnifications and unresolved pre-Separation tax matters of the Company's former parent. + References No definition available. + Details
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- Definition In connection with the Separation and Distribution Agreement and Tax Sharing Agreement, this is the percentage share for which the Company's former affiliate is responsible for certain contingent liabilities relating to certain guarantee commitments and indemnifications and unresolved pre-Separation tax matters of the Company's former parent. + References No definition available. + Details
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