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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jul. 01, 2017 | Jul. 02, 2016 | Jul. 01, 2017 | Jul. 02, 2016 | Oct. 01, 2016
Income Tax Disclosure [Abstract] |  |  |  |  |
Effective tax rate for continuing operations | 27.40% | 31.80% | 32.50% | 33.20% |
Unrecognized Tax Benefit, Percent Reduction Resulting from Lapse of Applicable Statute of Limitations | 2.90% | 1.10% |  | 1.40% |
Effective Income Tax Rate Reconciliation, Benefit Recognized on the Outside Basis Difference in an Asset Held for Sale | 4.20% |  | 1.30% |  |
Unrecognized tax benefits | $ 311 |  | $ 311 |  | $ 305
Unrecognized tax benefits, reductions that could result from expiration of statutes of limitations | $ 10 |  | $ 10 |  |

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