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Segment Reporting (Narrative) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 29, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 29, 2019 USD ($) Segments	Jun. 30, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | Segments			4
Sales	$ 10,885	$ 10,051	$ 31,521	$ 30,053
Beef
Segment Reporting Information [Line Items]
Sales	4,157		11,967
Pork
Segment Reporting Information [Line Items]
Sales	1,323		3,674
Chicken
Segment Reporting Information [Line Items]
Sales	3,331		9,853
Prepared Foods
Segment Reporting Information [Line Items]
Sales	2,089		6,265
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Sales	356		776
Segment Reconciling Items [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Business Combination, Integration Related Costs	10	5	15	58
Sales	356	75	776	245
Intersegment Elimination
Segment Reporting Information [Line Items]
Sales	(371)	(319)	(1,014)	(997)
Intersegment Elimination | Beef
Segment Reporting Information [Line Items]
Sales	(111)	(112)	(301)	(311)
Intersegment Elimination | Pork
Segment Reporting Information [Line Items]
Sales	(246)	(188)	(671)	(620)
Intersegment Elimination | Chicken
Segment Reporting Information [Line Items]
Sales	$ (15)	$ (19)	$ (42)	(66)
Non-Protein Business [Member] | Cost of Sales | Non-Protein Business [Member] | Prepared Foods
Segment Reporting Information [Line Items]
Asset Impairment Charges, Net of (Gain) Loss on Disposition of Business				$ 79

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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