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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 30, 2019 | Mar. 31, 2018 | Mar. 30, 2019 | Mar. 31, 2018 | Sep. 29, 2018
Income Tax Disclosure [Abstract] |  |  |  |  |
Effective tax rate for continuing operations | 18.50% | 25.30% | 20.90% | (54.00%) |
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Percent |  | (2.20%) |  | (79.30%) |
Unrecognized tax benefits | $ 303 |  | $ 303 |  | $ 308
Decrease in Unrecognized Tax Benefits is Reasonably Possible | $ 60 |  | $ 60 |  |

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