Income Tax Expense Additional Information (Details Textuals) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Mar. 30, 2018	Dec. 29, 2017	Dec. 30, 2016	Dec. 29, 2017	Dec. 30, 2016
Income Tax Disclosure [Line Items]
U.S. federal statutory income tax rate, percent		35.00%		28.00%
Tax cuts and jobs act of 2017, provisional income tax expense amount		$ 1,660		$ 1,660
Tax cuts and jobs Act of 2017, change in tax rate, provisional amount		$ 88		$ 88
Deferred tax assets, projected effective rate at which position will reverse		29.00%		29.00%
Deferred tax liabilities, projected effective rate at which position will reverse		22.00%		22.00%
Tax cuts and jobs act of 2017, transition tax for accumulated foreign earnings, liability, incomplete accounting, provisional amount				$ 1,660
Tax cuts and jobs act of 2017, transition tax for accumulated foreign earnings, liability, current, incomplete accounting, provisional amount		$ 132		132
Effective income tax rate reconciliation, change in enacted tax rate, amount		$ 7		$ 7
Effective tax rate		206.00%	27.00%	110.00%	362.00%
Excess tax benefit from share-based compensation, operating activities		$ 5		$ 27
Income tax expense		1,597	$ 86	1,626	$ 181
Deferred tax assets, valuation allowance					109
Extinguishment of debt, amount					(96)
Unrecognized tax benefits, period increase (decrease)				7
Unrecognized tax benefits		529		529
Income tax penalties and interest accrued		$ 94		94
Scenario, Forecast
Income Tax Disclosure [Line Items]
U.S. federal statutory income tax rate, percent	21.00%
Pro Forma
Income Tax Disclosure [Line Items]
Effective tax rate		4.00%
SanDisk
Income Tax Disclosure [Line Items]
Income tax expense					$ 90
Internal Revenue Service (IRS)
Income Tax Disclosure [Line Items]
Current federal tax expense (benefit)				$ 795