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Segment Reporting (Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended
Segment Reporting (Narrative) (Details) $ in Millions	Apr. 03, 2021 USD ($) Segments	Mar. 28, 2020 USD ($)	Apr. 03, 2021 USD ($)	Mar. 28, 2020 USD ($)	Jan. 02, 2021 USD ($)	Oct. 03, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments \| Segments	4
Sales	$ 11,300	$ 10,888	$ 21,760	$ 21,703
Loss Contingency Accrual	342		342			$ 18
Operating Income (Loss)	720	515	1,425	1,273
Revision of Prior Period, Adjustment [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)		14		(54)
Broiler Antitrust Civil Litigation [Member]
Segment Reporting Information [Line Items]
Loss Contingency Accrual					$ 320
Beef [Member]
Segment Reporting Information [Line Items]
Sales	4,046	3,979	8,033	7,817
Pork [Member]
Segment Reporting Information [Line Items]
Sales	1,477	1,266	2,916	2,645
Chicken [Member]
Segment Reporting Information [Line Items]
Sales	3,553	3,397	6,384	6,689
Prepared Foods [Member]
Segment Reporting Information [Line Items]
Sales	2,164	2,080	4,277	4,220
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Sales	487	465	956	963
Operating Segments [Member] \| Beef [Member]
Segment Reporting Information [Line Items]
Sales	4,046	3,979	8,033	7,817
Operating Income (Loss)	445	123	973	465
Operating Segments [Member] \| Pork [Member]
Segment Reporting Information [Line Items]
Sales	1,477	1,266	2,916	2,645
Operating Income (Loss)	67	93	183	284
Operating Segments [Member] \| Chicken [Member]
Segment Reporting Information [Line Items]
Sales	3,553	3,397	6,384	6,689
Operating Income (Loss)	6	99	(210)	156
Operating Segments [Member] \| Prepared Foods [Member]
Segment Reporting Information [Line Items]
Sales	2,164	2,080	4,277	4,220
Operating Income (Loss)	217	191	483	349
Segment Reconciling Items [Member] \| Corporate and Other [Member]
Segment Reporting Information [Line Items]
Sales	487	465	956	963
Operating Income (Loss)	(15)	9	(4)	19
Intersegment Eliminations
Segment Reporting Information [Line Items]
Sales	$ (427)	$ (299)	$ (806)	$ (631)