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Business And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) | 12 Months Ended
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Oct. 03, 2020 | Sep. 28, 2019 | Sep. 29, 2018
Accounting Policies [Line Items] |  |  |
Checks outstanding in excess of related book cash | $ 200,000,000 |  |
Allowance for uncollectible accounts | $ 26,000,000 | $ 21,000,000 |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount | 20.00% |  |
Maximum Length Of Time Hedged Anticipated Transactions | 18 months |  |
Research and development costs | $ 98,000,000 | 97,000,000 | $ 114,000,000
Goodwill | $ 11,516,000,000 | 11,461,000,000 | 10,356,000,000
Indefinite-lived intangibles, Percentage of Fair Value in Excess of Carrying Amount | 20.00% |  |
Selling, General and Administrative Expenses [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Advertising Expense | $ 283,000,000 | $ 276,000,000 | $ 243,000,000
Minimum [Member] | Customer Relationships [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 7 years |  |
Maximum [Member] | Brands & Trademarks |  |  |
Accounting Policies [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 20 years |  |
Maximum [Member] | Customer Relationships [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 30 years |  |
Buildings And Leasehold Improvements [Member] | Minimum [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Property, plant, and equipment estimated lives | 10 years |  |
Buildings And Leasehold Improvements [Member] | Maximum [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Property, plant, and equipment estimated lives | 33 years |  |
Machinery And Equipment [Member] | Minimum [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Property, plant, and equipment estimated lives | 3 years |  |
Machinery And Equipment [Member] | Maximum [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Property, plant, and equipment estimated lives | 12 years |  |
Land Improvements [Member] | Minimum [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Property, plant, and equipment estimated lives | 3 years |  |
Land Improvements [Member] | Maximum [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Property, plant, and equipment estimated lives | 20 years |  |
Domestic Chicken [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Goodwill | $ 3,266 |  |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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