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Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Sep. 29, 2018 | Sep. 30, 2017
--- | --- | ---
Deferred tax assets: |  |
Accrued liabilities and other reserves | $ 3,151 | $ 4,019
Basis of capital assets | 137 | 1,230
Deferred revenue | 1,141 | 1,521
Deferred cost sharing | 0 | 667
Share-based compensation | 513 | 703
Unrealized losses | 871 | 0
Other | 797 | 834
Total deferred tax assets | 6,610 | 8,974
Deferred tax liabilities: |  |
Earnings of foreign subsidiaries | 275 | 36,355
Other | 501 | 207
Total deferred tax liabilities | 776 | 36,562
Net deferred tax assets | $ 5,834 |
Net deferred tax liabilities |  | $ (27,588)

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