Goodwill And Intangible Assets (Goodwill Activity) (Details) - USD ($) $ in Millions	12 Months Ended
Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 10,356	$ 9,941
Accumulated impairment losses	(617)	(617)	$ (617)
Goodwill, net	10,844	9,739	9,324
Acquisition	1,121	447
Goodwill, Written off Related to Sale of Business Unit	(77)	(30)
Goodwill, Foreign Currency Translation Gain (Loss)	(5)
Measurement period adjustments	66	(2)
Allocation of acquired goodwill		0
Goodwill, end of period	11,461	10,356
Beef [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	1,236	1,236
Accumulated impairment losses	(560)	(560)	(560)
Goodwill, net	676	676	676
Acquisition	0	0
Goodwill, Written off Related to Sale of Business Unit	0	0
Goodwill, Foreign Currency Translation Gain (Loss)	0
Measurement period adjustments	0	0
Allocation of acquired goodwill		0
Goodwill, end of period	1,236	1,236
Pork [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	423	423
Accumulated impairment losses	0	0	0
Goodwill, net	423	423	423
Acquisition	0	0
Goodwill, Written off Related to Sale of Business Unit	0	0
Goodwill, Foreign Currency Translation Gain (Loss)	0
Measurement period adjustments	0	0
Allocation of acquired goodwill		0
Goodwill, end of period	423	423
Chicken [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	2,498	1,565
Accumulated impairment losses	0	0	0
Goodwill, net	3,274	2,498	1,565
Acquisition	779	365
Goodwill, Written off Related to Sale of Business Unit	(70)	0
Goodwill, Foreign Currency Translation Gain (Loss)	1
Measurement period adjustments	66	0
Allocation of acquired goodwill		568
Goodwill, end of period	3,274	2,498
Prepared Foods [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	6,142	3,678
Accumulated impairment losses	0	0	0
Goodwill, net	6,134	6,142	3,678
Acquisition	0	82
Goodwill, Written off Related to Sale of Business Unit	(7)	(30)
Goodwill, Foreign Currency Translation Gain (Loss)	(1)
Measurement period adjustments	0	0
Allocation of acquired goodwill		2,412
Goodwill, end of period	6,134	6,142
Other [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	57	57
Accumulated impairment losses	(57)	(57)	(57)
Goodwill, net	337	0	0
Acquisition	342	0
Goodwill, Written off Related to Sale of Business Unit	0	0
Goodwill, Foreign Currency Translation Gain (Loss)	(5)
Measurement period adjustments	0	0
Allocation of acquired goodwill		0
Goodwill, end of period	394	57
Unallocated Goodwill [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	0	2,982
Accumulated impairment losses	0	0	0
Goodwill, net	0	0	$ 2,982
Acquisition	0	0
Goodwill, Written off Related to Sale of Business Unit	0	0
Goodwill, Foreign Currency Translation Gain (Loss)	0
Measurement period adjustments	0	(2)
Allocation of acquired goodwill		(2,980)
Goodwill, end of period	$ 0	$ 0

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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