Derivative Financial Instruments (Aggregate Outstanding Notionals) (Details) lb in Millions, bu in Millions, $ in Millions	Mar. 28, 2020 USD ($) bu lb T	Sep. 28, 2019 USD ($) bu lb T
Corn (in bushels)
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bu	121	111
Soy Meal (in tons)
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | T	728,700	1,078,800
Live Cattle [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | lb	82	14
Lean Hogs [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | lb	65	309
Foreign Currency [Member]
Derivative [Line Items]
Derivative, Notional Amount | $	$ 488	$ 148
Interest rate hedges
Derivative [Line Items]
Derivative, Notional Amount | $	$ 400	$ 400