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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Oct. 03, 2020 | Sep. 28, 2019 | Sep. 29, 2018
Income Tax Disclosure [Line Items] |  |  |
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount |  | $ 160 |
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | $ 5 | $ 21 | $ 8
Federal income tax rate | 21.00% | 21.00% | 24.50%
Impact of the Tax Act |  |  | $ 33
Impairment and Sale of Non-Protein Businesses |  |  | 3.20%
Domestic production deduction |  |  | $ 46
State Income Taxes | $ 78 | $ 66 | 86
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Amount |  |  | (996)
Income (Loss) from Continuing Operations before Income Taxes, Domestic | 2,605 | 2,275 | $ 2,637
Tax credit carryforwards | 48 |  |
Accumulated undistributed earnings of foreign subsidiaries | 318 | 252 |
Unrecognized tax benefits that would impact effective tax rate | 118 | 116 |
Unrecognized tax benefits, income tax penalties and interest accrued | 51 | $ 46 |
Expire in Fiscal Years 2021-2034 [Member] |  |  |
Income Tax Disclosure [Line Items] |  |  |
Tax credit carryforwards | 46 |  |
State and Local Jurisdiction [Member] |  |  |
Income Tax Disclosure [Line Items] |  |  |
Operating loss carryforwards | 799 |  |
Foreign Country [Member] |  |  |
Income Tax Disclosure [Line Items] |  |  |
Operating loss carryforwards | 238 |  |
Expire in Fiscal Years 2021-2039 [Member] | State and Local Jurisdiction [Member] |  |  |
Income Tax Disclosure [Line Items] |  |  |
Operating loss carryforwards | 747 |  |
Expire in FIscal Years 2021-2032 [Member] | Foreign Country [Member] |  |  |
Income Tax Disclosure [Line Items] |  |  |
Operating loss carryforwards | $ 104 |  |

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to disposition of a business not qualifying as a discontinued operation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to Tax Cuts and Jobs Act. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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