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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

Income tax expense (benefit) resulting from lapses of statutes limitations.

+ References

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Income tax expense (benefit) related to the tax impacts of the Tax Cuts and Jobs Act.

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Income tax expense (benefit) relating to increase (reduction) in the valuation allowance recorded against certain U.S. federal tax credit carryforwards.

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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.

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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.

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Net income tax expense (benefit) associated with the tax impacts of certain legal entity restructurings and intercompany transactions.

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Amount of net income tax expense (benefit) related to certain legal entity restructurings.

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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