Derivative Financial Instruments (Aggregate Outstanding Notionals) (Details) lb in Millions, bu in Millions, $ in Millions	Dec. 29, 2018 USD ($) bu lb T	Sep. 29, 2018 USD ($) bu lb T
Corn (in bushels)
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bu	63	112
Soy Meal (in tons)
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | T	607,200	651,700
Live Cattle [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | lb	256	105
Lean Hogs [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | lb	151	39
Foreign Currency [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 261	$ 89
Interest rate hedges
Derivative [Line Items]
Derivative, Notional Amount	400	400
Treasury Rate Locks
Derivative [Line Items]
Derivative, Notional Amount	$ 1,200	$ 0