Number of subsidiaries involved in investigation.

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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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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Income Taxes - Additional Information (Details) $ in Millions, € in Billions				12 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Aug. 30, 2016 EUR (€) Subsidiary	Sep. 26, 2020 USD ($)	Sep. 28, 2019 USD ($)	Sep. 29, 2018 USD ($)	Sep. 26, 2020 EUR (€)	Sep. 30, 2017 USD ($)
Income Tax Contingency [Line Items]
U.S. statutory federal income tax rate	21.00%	35.00%		21.00%	21.00%	24.50%
Foreign pre-tax earnings				$ 38,100	$ 44,300	$ 48,000
Gross unrecognized tax benefits				16,475	15,619	9,694		$ 8,407
Gross unrecognized tax benefits that would impact effective tax rate, if recognized				8,800	8,600
Reasonably possible decrease in gross unrecognized tax benefits over next 12 months				3,900
Gross interest and penalties accrued				1,400	1,300
Interest and penalty expense				$ 85	$ 73	$ 489
Unfavorable investigation outcome, EU State Aid rules
Income Tax Contingency [Line Items]
Number of subsidiaries impacted by the European Commission tax ruling \| Subsidiary			2
Maximum potential loss related to European Commission tax ruling \| €			€ 13.1				€ 12.9
Unfavorable investigation outcome, EU State Aid rules - interest component
Income Tax Contingency [Line Items]
Maximum potential loss related to European Commission tax ruling \| €			€ 1.2