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Segment Reporting (Narrative) (Details) $ in Millions	12 Months Ended
Segment Reporting (Narrative) (Details) $ in Millions	Oct. 02, 2021 USD ($)	Oct. 03, 2020 USD ($)	Sep. 28, 2019 USD ($)	Nov. 30, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of segments	4
Goodwill	$ 10,549	$ 10,899	$ 10,844
Sales	47,049	43,185	42,405
Sales [Member]
Segment Reporting Information [Line Items]
Loss Contingency, Loss in Period	545
UNITED STATES
Segment Reporting Information [Line Items]
Long-lived assets	25,100	25,600
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Long-lived assets	8,700	8,500
Non-US [Member]
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Non-US [Member] \| Long-Lived Assets Excluding Goodwill and Intangibles [Member]
Segment Reporting Information [Line Items]
Long-lived assets	745	648
Export sales [Member] \| UNITED STATES
Segment Reporting Information [Line Items]
Sales	$ 4,900	$ 4,000	$ 4,100
Revenue Benchmark [Member] \| Geographic Concentration Risk [Member] \| UNITED STATES
Segment Reporting Information [Line Items]
Concentration, Percentage	95.00%	95.00%	96.00%
Revenue Benchmark [Member] \| Geographic Concentration Risk [Member] \| Non-US [Member] \| Maximum [Member]
Segment Reporting Information [Line Items]
Concentration, Percentage	10.00%	10.00%	10.00%
Wal-Mart Stores, Inc. [Member] \| Revenue Benchmark [Member] \| Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration, Percentage	18.30%	18.70%	16.90%
Other [Member]
Segment Reporting Information [Line Items]
Goodwill	$ 392	$ 392	$ 337
Sales	1,990	1,856	1,289
Beef [Member]
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Sales	17,999	15,742	15,828
Pork [Member]
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Goodwill	423	423	423
Sales	6,277	5,128	4,932
Chicken [Member]
Segment Reporting Information [Line Items]
Goodwill	3,274	3,274	3,274
Sales	13,733	13,234	13,300
Prepared Foods [Member]
Segment Reporting Information [Line Items]
Goodwill	5,784	6,134	6,134
Sales	8,853	8,532	8,418
Segment Reconciling Items [Member] \| Other [Member]
Segment Reporting Information [Line Items]
Business Combination, Acquisition Related Costs	2	5	36
Sales	1,990	1,856	1,289
Operating Segments [Member] \| Beef [Member]
Segment Reporting Information [Line Items]
Sales	17,999	15,742	15,828
Operating Segments [Member] \| Pork [Member]
Segment Reporting Information [Line Items]
Sales	6,277	5,128	4,932
Operating Segments [Member] \| Chicken [Member]
Segment Reporting Information [Line Items]
Sales	13,733	13,234	13,300
Operating Segments [Member] \| Prepared Foods [Member]
Segment Reporting Information [Line Items]
Sales	8,853	8,532	8,418
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales	$ (1,803)	$ (1,307)	$ (1,362)
Keystone Foods [Member]
Segment Reporting Information [Line Items]
Goodwill				$ 1,120
Keystone Foods [Member] \| Other [Member]
Segment Reporting Information [Line Items]
Goodwill				341
Keystone Foods [Member] \| Chicken [Member]
Segment Reporting Information [Line Items]
Goodwill				$ 779