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Quarterly Financial Data (Unaudited) (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended							12 Months Ended
	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Quarterly Financial Data [Line Items]
Post Tax Recognition of Tax Benefit from Remeasurement of Net Deferred Tax Liabilities								$ 1,004
Asset Impairment Charges								175	$ 214	$ 45
Gain on disposition of Business								42	0	$ 0
AdvancePierre [Member]
Quarterly Financial Data [Line Items]
Business Acquisition, Expense from Purchase Accounting and Acquisition Related Costs					$ 26	$ 77
AdvancePierre [Member] | Fair Value Adjustment to Inventory [Member]
Quarterly Financial Data [Line Items]
Business Acquisition, Fair Value Inventory Adjustment					12	24			36
AdvancePierre [Member] | Acquisition-related Costs [Member]
Quarterly Financial Data [Line Items]
Business Combination, Acquisition Related Costs					14	35
AdvancePierre [Member] | Acquisition-related Costs [Member] | Bridge Loan [Member]
Quarterly Financial Data [Line Items]
Business Combination, Acquisition Related Costs						18
One Time Cash Bonus [Member]
Quarterly Financial Data [Line Items]
One-Time Cash Bonus			$ 109
San Diego Prepared Foods operation [Member] | Prepared Foods [Member]
Quarterly Financial Data [Line Items]
Asset Impairment Charges							$ 52
Financial Fitness Program [Member]
Quarterly Financial Data [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 14	$ 14	12	$ 19	150			$ 59	$ 150
Non-Protein Business [Member]
Quarterly Financial Data [Line Items]
Benefit Recognized on the Outside Basis Difference in an Asset Held for Sale						$ 26
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations [Member] | Non-Protein Business [Member]
Quarterly Financial Data [Line Items]
Asset Impairment Charges, Net of (Gain) Loss on Disposition of Business				4
Asset Impairment Charges			75		$ 45
Gain on disposition of Business	$ 11
After Tax [Member]
Quarterly Financial Data [Line Items]
Post Tax Recognition of Tax Benefit from Remeasurement of Net Deferred Tax Liabilities			$ 9	$ 994

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