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Segment Reporting (Segment Reporting Information, By Segment) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 29, 2018 | Dec. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | $ 10,193 |  | $ 10,229
Operating Income (Loss) |  | 807 |  | 922
Total other (income) expense |  | 94 |  | 80
Income before income taxes |  | 713 |  | 842
Beef |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | 3,926 |  |
Pork |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | 1,179 |  |
Chicken |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | 3,115 |  |
Prepared Foods |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | 2,149 |  |
Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | 143 |  |
Operating Segments [Member] | Beef |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | 3,926 |  | 3,886
Operating Income (Loss) |  | 305 |  | 256
Operating Segments [Member] | Pork |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | 1,179 |  | 1,283
Operating Income (Loss) |  | 95 |  | 151
Operating Segments [Member] | Chicken |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | 3,115 |  | 2,997
Operating Income (Loss) |  | 160 | [1] | 272
Operating Segments [Member] | Prepared Foods |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | 2,149 |  | 2,292
Operating Income (Loss) |  | 265 |  | 256
Segment Reconciling Items [Member] | Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | 143 |  | 88
Operating Income (Loss) | [2] | (18) |  | (13)
Business Combination, Integration Related Costs |  | 4 |  | 4
Intersegment Elimination |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | (319) |  | (317)
Intersegment Elimination | Beef |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | (90) |  | (94)
Intersegment Elimination | Pork |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | (215) |  | (201)
Intersegment Elimination | Chicken |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales |  | (14) |  | $ (22)
Keystone Foods [Member] | Operating Segments [Member] | Chicken |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Business Acquisition, Expense from Purchase Accounting and Acquisition Related Costs |  | 8 |  |
Keystone Foods [Member] | Operating Segments [Member] | Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Business Acquisition, Expense from Purchase Accounting and Acquisition Related Costs |  | $ 18 |  |
[1] | (a) Chicken operating income includes $8 million in Keystone Foods purchase price accounting adjustments for the three months ended December 29, 2018.
[2] | (b) Other operating loss includes $18 million Keystone Foods purchase accounting and acquisition related costs for the three months ended December 29, 2018, and other third-party merger and integration costs and corporate overhead of Tyson New Ventures, LLC of $4 million for each of the three months ended December 29, 2018, and December 30, 2017, respectively.

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