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Segment Reporting (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended								10 Months Ended	12 Months Ended
	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 28, 2019	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017	Nov. 30, 2018
Segment Reporting Information [Line Items]
Number of segments										4
Goodwill	$ 10,844				$ 9,739				$ 10,844	$ 10,844	$ 9,739	$ 9,324
Sales	10,884	$ 10,885	$ 10,443	$ 10,193	9,999	$ 10,051	$ 9,773	$ 10,229		42,405	40,052	38,260
UNITED STATES
Segment Reporting Information [Line Items]
Long-lived assets	24,800				23,200				24,800	24,800	23,200
UNITED STATES | Long-Lived Assets Excluding Goodwill and Intangibles [Member]
Segment Reporting Information [Line Items]
Long-lived assets	7,500				6,700				7,500	7,500	6,700
Non-US [Member]
Segment Reporting Information [Line Items]
Long-lived assets	1,107				212				1,107	1,107	212
Non-US [Member] | Long-Lived Assets Excluding Goodwill and Intangibles [Member]
Segment Reporting Information [Line Items]
Long-lived assets	506				201				506	506	201
Export sales [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Sales										$ 4,100	$ 4,200	$ 3,900
Revenue Benchmark [Member] | Geographic Concentration Risk [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Concentration, Percentage										96.00%	99.00%	98.00%
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										16.90%	17.30%	17.30%
Other [Member]
Segment Reporting Information [Line Items]
Goodwill	337				0				337	$ 337	$ 0	$ 0
Sales										1,289
Beef [Member]
Segment Reporting Information [Line Items]
Goodwill	676				676				676	676	676	676
Sales										15,828
Pork [Member]
Segment Reporting Information [Line Items]
Goodwill	423				423				423	423	423	423
Sales										4,932
Chicken [Member]
Segment Reporting Information [Line Items]
Goodwill	3,274				2,498				3,274	3,274	2,498	1,565
Sales										13,300
Prepared Foods [Member]
Segment Reporting Information [Line Items]
Goodwill	6,134				$ 6,142				6,134	6,134	6,142	3,678
Sales										8,418
Segment Reconciling Items [Member] | Other [Member]
Segment Reporting Information [Line Items]
Business Combination, Acquisition Related Costs										36	26	67
Sales										1,289	305	349
Operating Segments [Member] | Beef [Member]
Segment Reporting Information [Line Items]
Sales										15,828	15,473	14,823
Operating Segments [Member] | Pork [Member]
Segment Reporting Information [Line Items]
Sales										4,932	4,879	5,238
Operating Segments [Member] | Chicken [Member]
Segment Reporting Information [Line Items]
Sales										13,300	12,044	11,409
Operating Segments [Member] | Prepared Foods [Member]
Segment Reporting Information [Line Items]
Sales										8,418	8,668	7,853
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales										(1,362)	(1,317)	(1,412)
Intersegment Eliminations [Member] | Beef [Member]
Segment Reporting Information [Line Items]
Sales										(411)	(420)	(386)
Intersegment Eliminations [Member] | Pork [Member]
Segment Reporting Information [Line Items]
Sales										(893)	(817)	(966)
Intersegment Eliminations [Member] | Chicken [Member]
Segment Reporting Information [Line Items]
Sales										(58)	$ (80)	(60)
AdvancePierre [Member]
Segment Reporting Information [Line Items]
Goodwill												$ 3,000
Keystone Foods [Member]
Segment Reporting Information [Line Items]
Business Combination, Acquisition Related Costs			$ 11	$ 15
Goodwill	$ 342								342	$ 342			$ 1,120
Sales									$ 1,970
Keystone Foods [Member] | Other [Member]
Segment Reporting Information [Line Items]
Goodwill													341
Keystone Foods [Member] | Chicken [Member]
Segment Reporting Information [Line Items]
Goodwill													$ 779

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