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Segment Reporting (Narrative) (Details) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 29, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jul. 01, 2017 USD ($)	Apr. 01, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 29, 2018 USD ($) Segments	Sep. 30, 2017 USD ($)	Oct. 01, 2016 USD ($)
Segment Reporting Information [Line Items]
Sales	$ 9,999	$ 10,051	$ 9,773	$ 10,229	$ 10,145	$ 9,850	$ 9,083	$ 9,182	$ 40,052	$ 38,260	$ 36,881
Number of segments | Segments									4
UNITED STATES
Segment Reporting Information [Line Items]
Long-lived assets	23,200				21,600				$ 23,200	21,600
UNITED STATES | Long-Lived Assets Excluding Goodwill and Intangibles [Member]
Segment Reporting Information [Line Items]
Long-lived assets	6,700				6,000				6,700	6,000
Non-US [Member]
Segment Reporting Information [Line Items]
Long-lived assets	212				217				212	217
Non-US [Member] | Long-Lived Assets Excluding Goodwill and Intangibles [Member]
Segment Reporting Information [Line Items]
Long-lived assets	$ 201				193				201	193
Geographic Concentration Risk [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Sales											$ 3,500
Export sales [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Sales									$ 4,200	$ 3,900
Sales Revenue, Goods, Net [Member] | Geographic Concentration Risk [Member] | UNITED STATES
Segment Reporting Information [Line Items]
Concentration, Percentage									99.00%	98.00%	98.00%
Sales Revenue, Goods, Net [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] | Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Concentration, Percentage									17.30%	17.30%	17.50%
Segment Reconciling Items [Member] | Other [Member]
Segment Reporting Information [Line Items]
Sales									$ 305	$ 349	$ 380
Business Combination, Acquisition Related Costs									26	67	37
Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Sales									(1,317)	(1,412)	(1,194)
Intersegment Sales [Member] | Beef [Member]
Segment Reporting Information [Line Items]
Sales									(420)	(386)	(327)
Intersegment Sales [Member] | Pork [Member]
Segment Reporting Information [Line Items]
Sales									(817)	(966)	(840)
Intersegment Sales [Member] | Chicken [Member]
Segment Reporting Information [Line Items]
Sales									$ (80)	(60)	$ (27)
AdvancePierre [Member]
Segment Reporting Information [Line Items]
Goodwill					$ 3,000					$ 3,000

X

- Definition

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