Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 28, 2019	Sep. 29, 2018
Deferred tax assets:
Amortization and depreciation	$ 11,433
Amortization and depreciation		$ 137
Accrued liabilities and other reserves	5,389	3,151
Deferred revenue	1,372	1,141
Share-based compensation	749	513
Unrealized losses	0	871
Other	697	797
Total deferred tax assets, net	19,640	6,610
Deferred tax liabilities:
Minimum tax on foreign earnings	10,809	0
Earnings of foreign subsidiaries	330	275
Other	456	501
Total deferred tax liabilities	11,595	776
Net deferred tax assets	$ 8,045	$ 5,834