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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Apr. 01, 2017 | Apr. 02, 2016 | Apr. 01, 2017 | Apr. 02, 2016 | Oct. 01, 2016
Income Tax Disclosure [Abstract] |  |  |  |  |
Effective tax rate for continuing operations | 34.30% | 32.70% | 34.70% | 34.00% |
Unrecognized Tax Benefit, Percent Reduction Resulting from Lapse of Applicable Statute of Limitations |  | 2.90% |  | 1.40% |
Unrecognized tax benefits | $ 314 |  | $ 314 |  | $ 305
Unrecognized tax benefits, reductions that could result from expiration of statutes of limitations | $ 24 |  | $ 24 |  |

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 + Details
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