Goodwill And Intangible Assets (Goodwill Activity) (Details) - USD ($) $ in Millions	12 Months Ended
Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 11,461	$ 10,356
Accumulated impairment losses	(617)	(617)	$ (617)
Goodwill, net	10,899	10,844	9,739
Acquisition		1,121
Goodwill, Written off Related to Sale of Business Unit		(77)
Goodwill, Foreign Currency Translation Gain (Loss)	9	(5)
Measurement period adjustments	46	66
Goodwill, end of period	11,516	11,461
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
Goodwill, Written off Related to Sale of Business Unit		0
Goodwill, Foreign Currency Translation Gain (Loss)	0	0
Measurement period adjustments	0	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
Goodwill, Written off Related to Sale of Business Unit		0
Goodwill, Foreign Currency Translation Gain (Loss)	0	0
Measurement period adjustments	0	0
Goodwill, end of period	423	423
Chicken [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	3,274	2,498
Accumulated impairment losses	0	0	0
Goodwill, net	3,274	3,274	2,498
Acquisition		779
Goodwill, Written off Related to Sale of Business Unit		(70)
Goodwill, Foreign Currency Translation Gain (Loss)	0	1
Measurement period adjustments	0	66
Goodwill, end of period	3,274	3,274
Prepared Foods [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	6,134	6,142
Accumulated impairment losses	0	0	0
Goodwill, net	6,134	6,134	6,142
Acquisition		0
Goodwill, Written off Related to Sale of Business Unit		(7)
Goodwill, Foreign Currency Translation Gain (Loss)	0	(1)
Measurement period adjustments	0	0
Goodwill, end of period	6,134	6,134
Other [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	394	57
Accumulated impairment losses	(57)	(57)	(57)
Goodwill, net	392	337	0
Acquisition		342
Goodwill, Written off Related to Sale of Business Unit		0
Goodwill, Foreign Currency Translation Gain (Loss)	9	(5)
Measurement period adjustments	46	0
Goodwill, end of period	449	394
Unallocated Goodwill [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	0	0
Accumulated impairment losses	0	0	0
Goodwill, net	0	0	$ 0
Acquisition		0
Goodwill, Written off Related to Sale of Business Unit		0
Goodwill, Foreign Currency Translation Gain (Loss)	0	0
Measurement period adjustments	0	0
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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

+ Details

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillForeignCurrencyTranslationGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of accumulated impairment loss for 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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e961-128460

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillPurchaseAccountingAdjustments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

Name:	us-gaap_GoodwillRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of divestiture 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=tsn_BeefMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=tsn_PorkMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=tsn_ChickenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=tsn_PreparedFoodsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=tsn_UnallocatedGoodwillMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: