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Goodwill And Intangible Assets (Goodwill Activity) (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2017	Oct. 01, 2016		Oct. 03, 2015
Goodwill [Roll Forward]
Goodwill, beginning of period		$ 7,286	$ 7,284
Accumulated impairment losses		(617)	(617)		$ (617)
Goodwill, net		9,324	6,669		6,667
Currency translation and other			2
Acquisition		2,982
Reclass to assets held for sale		(327)
Goodwill, end of period		9,941	7,286
Beef [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period		1,236	1,236
Accumulated impairment losses		(560)	(560)		(560)
Goodwill, net		676	676		676
Currency translation and other			0
Acquisition		0
Reclass to assets held for sale		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
Currency translation and other			0
Acquisition		0
Reclass to assets held for sale		0
Goodwill, end of period		423	423
Chicken [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period		1,565	1,563
Accumulated impairment losses		0	0		0
Goodwill, net		1,565	1,565		1,563
Currency translation and other			2
Acquisition		0
Reclass to assets held for sale		0
Goodwill, end of period		1,565	1,565
Prepared Foods [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period		4,005	4,005
Accumulated impairment losses		0	0		0
Goodwill, net		3,678	4,005		4,005
Currency translation and other			0
Acquisition		0
Reclass to assets held for sale		(327)
Goodwill, end of period		3,678	4,005
Other [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	[1]	57	57
Accumulated impairment losses	[1]	(57)	(57)		(57)
Goodwill, net	[1]	0	0		0
Currency translation and other	[1]		0
Acquisition		0
Reclass to assets held for sale		0
Goodwill, end of period	[1]	57	57
Unallocated Goodwill [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period		0	0	[1]
Accumulated impairment losses		0	0		0	[1]
Goodwill, net		2,982	0		$ 0	[1]
Currency translation and other			0
Acquisition		2,982
Reclass to assets held for sale		0
Goodwill, end of period		$ 2,982	$ 0
[1] Other included the goodwill from our foreign chicken operation.

X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount before 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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+ References

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Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments 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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