Segment Reporting (Narrative) (Details)	3 Months Ended		6 Months Ended
	Mar. 28, 2020 USD ($) Segments	Mar. 30, 2019 USD ($)	Mar. 28, 2020 USD ($)	Mar. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | Segments	4
Sales	$ 10,888,000,000	$ 10,443,000,000	$ 21,703,000,000	$ 20,636,000,000
Beef [Member]
Segment Reporting Information [Line Items]
Sales	3,979,000,000	3,884,000,000	7,817,000,000	7,810,000,000
Pork [Member]
Segment Reporting Information [Line Items]
Sales	1,266,000,000	1,172,000,000	2,645,000,000	2,351,000,000
Chicken [Member]
Segment Reporting Information [Line Items]
Sales	3,397,000,000	3,407,000,000	6,689,000,000	6,522,000,000
Prepared Foods [Member]
Segment Reporting Information [Line Items]
Sales	2,080,000,000	2,027,000,000	4,220,000,000	4,176,000,000
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Sales	465,000,000	277,000,000	963,000,000	420,000,000
Operating Segments [Member] | Beef [Member]
Segment Reporting Information [Line Items]
Sales	3,979,000,000	3,884,000,000	7,817,000,000	7,810,000,000
Operating Segments [Member] | Pork [Member]
Segment Reporting Information [Line Items]
Sales	1,266,000,000	1,172,000,000	2,645,000,000	2,351,000,000
Operating Segments [Member] | Chicken [Member]
Segment Reporting Information [Line Items]
Sales	3,397,000,000	3,407,000,000	6,689,000,000	6,522,000,000
Operating Segments [Member] | Prepared Foods [Member]
Segment Reporting Information [Line Items]
Sales	2,080,000,000	2,027,000,000	4,220,000,000	4,176,000,000
Segment Reconciling Items [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Sales	465,000,000	277,000,000	963,000,000	420,000,000
Business Combination, Integration Related Costs	0	4,000,000	4,000,000	5,000,000
Intersegment Eliminations
Segment Reporting Information [Line Items]
Sales	$ (299,000,000)	(324,000,000)	$ (631,000,000)	(643,000,000)
Keystone Foods [Member] | Operating Segments [Member] | Chicken [Member]
Segment Reporting Information [Line Items]
Business Acquisition, Expense from Purchase Accounting and Acquisition Related Costs		5,000,000		13,000,000
Keystone Foods [Member] | Segment Reconciling Items [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Business Acquisition, Expense from Purchase Accounting and Acquisition Related Costs		$ 6,000,000		$ 24,000,000