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Segment Reporting (Narrative) (Details) $ in Millions	3 Months Ended		9 Months Ended
Segment Reporting (Narrative) (Details) $ in Millions	Jul. 03, 2021 USD ($) Segments	Jun. 27, 2020 USD ($)	Jul. 03, 2021 USD ($)	Jun. 27, 2020 USD ($)	Jan. 02, 2021 USD ($)	Oct. 03, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments \| Segments	4
Sales	$ 12,478	$ 10,022	$ 34,238	$ 31,725
Loss Contingency Accrual	652		652			$ 18
Operating Income (Loss)	1,062	773	2,487	2,046
Loss Contingency, Loss in Period	306		626
Assets Disposed of by Method Other than Sale, in Period of Disposition, Gain (Loss) on Disposition	(4)		(23)
Revised Results due to misappropriated Company funds [Member]
Segment Reporting Information [Line Items]
Unusual or Infrequent Item, or Both, Net (Gain) Loss		(2)	55	(56)
Revision of Prior Period, Adjustment [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)		(2)		(56)
Broiler Antitrust Civil Litigation [Member]
Segment Reporting Information [Line Items]
Loss Contingency Accrual	545		545		$ 320
Beef [Member]
Segment Reporting Information [Line Items]
Sales	4,954	3,653	12,987	11,470
Pork [Member]
Segment Reporting Information [Line Items]
Sales	1,715	1,115	4,631	3,760
Chicken [Member]
Segment Reporting Information [Line Items]
Sales	3,476	3,112	9,860	9,801
Prepared Foods [Member]
Segment Reporting Information [Line Items]
Sales	2,323	2,035	6,600	6,255
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Sales	488	402	1,444	1,365
Operating Segments [Member] \| Beef [Member]
Segment Reporting Information [Line Items]
Sales	4,954	3,653	12,987	11,470
Operating Income (Loss)	1,120	649	2,093	1,114
Operating Segments [Member] \| Pork [Member]
Segment Reporting Information [Line Items]
Sales	1,715	1,115	4,631	3,760
Operating Income (Loss)	67	107	250	391
Operating Segments [Member] \| Chicken [Member]
Segment Reporting Information [Line Items]
Sales	3,476	3,112	9,860	9,801
Operating Income (Loss)	(279)	(120)	(489)	36
Operating Segments [Member] \| Prepared Foods [Member]
Segment Reporting Information [Line Items]
Sales	2,323	2,035	6,600	6,255
Operating Income (Loss)	150	145	633	494
Segment Reconciling Items [Member] \| Corporate and Other [Member]
Segment Reporting Information [Line Items]
Sales	488	402	1,444	1,365
Operating Income (Loss)	4	(8)	0	11
Intersegment Eliminations
Segment Reporting Information [Line Items]
Sales	(478)	$ (295)	(1,284)	$ (926)
Cost of Sales
Segment Reporting Information [Line Items]
Loss Contingency, Loss in Period	81		81
Sales
Segment Reporting Information [Line Items]
Loss Contingency, Loss in Period	$ 225		$ 545