Segment Reporting (Narrative) (Details) $ in Millions	12 Months Ended
	Sep. 28, 2024 USD ($) Segments	Sep. 30, 2023 USD ($)	Oct. 01, 2022 USD ($)	Oct. 02, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | Segments	4
Sales	$ 53,309	$ 52,881	$ 53,282
Loss Contingency Accrual	349	289
Operating Income (Loss)	1,409	(395)	4,410
UNITED STATES
Segment Reporting Information [Line Items]
Assets, Noncurrent	25,900	26,100
Assets, Noncurrent	25,900	26,100
UNITED STATES | Long-Lived Assets Excluding Goodwill and Intangibles
Segment Reporting Information [Line Items]
Assets, Noncurrent	10,600	10,500
Assets, Noncurrent	10,600	10,500
Non-US
Segment Reporting Information [Line Items]
Assets, Noncurrent	1,400	1,400
Assets, Noncurrent	1,400	1,400
Non-US | Long-Lived Assets Excluding Goodwill and Intangibles
Segment Reporting Information [Line Items]
Assets, Noncurrent	1,062	1,101
Assets, Noncurrent	1,062	1,101
Export Sales | UNITED STATES
Segment Reporting Information [Line Items]
Sales	$ 5,200	$ 5,100	$ 5,800
Revenue Benchmark | Geographic Concentration Risk | UNITED STATES
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	95.00%	95.00%	95.00%
Revenue Benchmark | Geographic Concentration Risk | Maximum | Non-US
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	10.00%	10.00%	10.00%
Revenue Benchmark | Customer Concentration Risk | Wal Mart Stores Inc Member
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	18.40%	18.60%	17.70%
Broiler Antitrust Civil Litigation [Member]
Segment Reporting Information [Line Items]
Loss Contingency Accrual	$ 86	$ 184
Chicken [Member] | Broiler Antitrust Civil Litigation [Member]
Segment Reporting Information [Line Items]
Loss Contingency, Loss in Period		156		$ 545
Intersegment Revenues
Segment Reporting Information [Line Items]
Sales		(1,632)	$ (1,991)
Operating Segments [Member] | Beef [Member]
Segment Reporting Information [Line Items]
Sales	20,479	19,325	19,854
Operating Income (Loss)	(381)	(91)	2,502
Operating Segments [Member] | Pork [Member]
Segment Reporting Information [Line Items]
Sales	5,903	5,768	6,414
Operating Income (Loss)	(40)	(139)	193
Operating Segments [Member] | Chicken [Member]
Segment Reporting Information [Line Items]
Sales	16,425	17,060	16,961
Operating Income (Loss)	988	(770)	955
Operating Segments [Member] | Prepared Foods [Member]
Segment Reporting Information [Line Items]
Sales	9,851	9,845	9,689
Operating Income (Loss)	879	823	746
Operating Segments [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Sales	2,353	2,515	2,355
Operating Income (Loss)	(37)	(218)	14
Intersegment Eliminations
Segment Reporting Information [Line Items]
Sales	(1,702)	$ (1,632)	$ (1,991)
Cost of Sales | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds	86
Sales | Pork [Member]
Segment Reporting Information [Line Items]
Loss Contingency, Loss in Period	$ 45