Segment Reporting Disaggregation of Revenue (By Segment and Distribution Channel) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Disaggregation of Revenue [Line Items]
Sales		$ 10,888	$ 10,443	$ 21,703	$ 20,636
Beef [Member]
Disaggregation of Revenue [Line Items]
Sales		3,979	3,884	7,817	7,810
Pork [Member]
Disaggregation of Revenue [Line Items]
Sales		1,266	1,172	2,645	2,351
Chicken [Member]
Disaggregation of Revenue [Line Items]
Sales		3,397	3,407	6,689	6,522
Prepared Foods [Member]
Disaggregation of Revenue [Line Items]
Sales		2,080	2,027	4,220	4,176
Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Sales		465	277	963	420
Retail
Disaggregation of Revenue [Line Items]
Sales	[1]	5,065	4,798	9,922	9,633
Retail | Beef [Member]
Disaggregation of Revenue [Line Items]
Sales		1,907	1,811	3,764	3,662
Retail | Pork [Member]
Disaggregation of Revenue [Line Items]
Sales		383	334	783	671
Retail | Chicken [Member]
Disaggregation of Revenue [Line Items]
Sales		1,550	1,463	2,939	2,835
Retail | Prepared Foods [Member]
Disaggregation of Revenue [Line Items]
Sales		1,225	1,190	2,436	2,465
Retail | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Sales		0	0	0	0
Foodservice
Disaggregation of Revenue [Line Items]
Sales	[2]	3,120	3,212	6,435	6,239
Foodservice | Beef [Member]
Disaggregation of Revenue [Line Items]
Sales		1,004	1,057	2,049	2,074
Foodservice | Pork [Member]
Disaggregation of Revenue [Line Items]
Sales		99	93	216	184
Foodservice | Chicken [Member]
Disaggregation of Revenue [Line Items]
Sales		1,239	1,307	2,546	2,437
Foodservice | Prepared Foods [Member]
Disaggregation of Revenue [Line Items]
Sales		778	755	1,624	1,544
Foodservice | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Sales		0	0	0	0
International
Disaggregation of Revenue [Line Items]
Sales	[3]	1,545	1,235	3,035	2,412
International | Beef [Member]
Disaggregation of Revenue [Line Items]
Sales		605	573	1,119	1,201
International | Pork [Member]
Disaggregation of Revenue [Line Items]
Sales		274	210	554	435
International | Chicken [Member]
Disaggregation of Revenue [Line Items]
Sales		167	155	328	312
International | Prepared Foods [Member]
Disaggregation of Revenue [Line Items]
Sales		34	20	71	44
International | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Sales		465	277	963	420
Industrial and Other
Disaggregation of Revenue [Line Items]
Sales	[4]	1,158	1,198	2,311	2,352
Industrial and Other | Beef [Member]
Disaggregation of Revenue [Line Items]
Sales		362	343	688	683
Industrial and Other | Pork [Member]
Disaggregation of Revenue [Line Items]
Sales		325	324	685	635
Industrial and Other | Chicken [Member]
Disaggregation of Revenue [Line Items]
Sales		428	469	849	911
Industrial and Other | Prepared Foods [Member]
Disaggregation of Revenue [Line Items]
Sales		43	62	89	123
Industrial and Other | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Sales		0	0	0	0
Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Sales		0	0	0	0
Intersegment Eliminations | Beef [Member]
Disaggregation of Revenue [Line Items]
Sales		101	100	197	190
Intersegment Eliminations | Pork [Member]
Disaggregation of Revenue [Line Items]
Sales		185	211	407	426
Intersegment Eliminations | Chicken [Member]
Disaggregation of Revenue [Line Items]
Sales		13	13	27	27
Intersegment Eliminations | Prepared Foods [Member]
Disaggregation of Revenue [Line Items]
Sales		0	0	0	0
Intersegment Eliminations | Corporate and Other [Member]
Disaggregation of Revenue [Line Items]
Sales		0	0	0	0
Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Sales		$ (299)	$ (324)	$ (631)	$ (643)

[1] (a) Includes sales to consumer products and food retailers, such as grocery retailers, warehouse club stores and internet-based retailers

[2] (b) Includes sales to foodservice distributors, restaurant operators, hotel chains and noncommercial foodservice establishments such as schools, convenience stores, healthcare facilities and the military.

[3] (c) Includes sales to international markets for internationally produced products or export sales of domestically produced products.

[4] (d) Includes sales to industrial food processing companies that further process our product to sell to end consumers and any remaining sales not included in the Consumer Products, Foodservice or International categories.