Business and Summary of Significant Accounting Policies New Accounting Pronouncements (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2022	Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, General and Administrative		$ 2,121	$ 2,218	$ 2,245
Operating Income (Loss)		1,098	1,409	(395)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		769	1,092	(678)
Income Tax Expense		262	270	(29)
Net Income		507	822	(649)
Net income attributable to Tyson		$ 474	$ 800	$ (648)
Diluted (USD per share)		$ 1.33	$ 2.25	$ (1.87)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest		$ 500	$ 912	$ (612)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent		467	876	(611)
Inventory, Net		5,681	5,195
Assets, Current		9,916	9,751
Assets		36,658	37,100	36,251
Deferred Income Taxes		2,195	2,285
Retained earnings		(18,647)	(18,873)
Total Tyson Shareholders’ Equity		18,085	18,390
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		18,227	18,514	18,255
Liabilities and Equity		36,658	37,100
Deferred income taxes		(76)	(45)	(183)
Restricted Cash		0	0	0
Processed products		3,086	2,897
Livestock		1,729	1,460
Supplies and other		866	838
Employee-related Liabilities, Current		909	912
Taxes Payable		193	210
Loss Contingency Accrual		712	349
Other Sundry Liabilities, Current		1,065	840
Other current liabilities		2,879	2,311
Checks Outstanding in Excess Of Related Book Cash Balances		100	100
Accounts Receivable, Allowance for Credit Loss		49	38
Equity Method Investments		566	550
Research and Development Expense		126	106	114
Goodwill, Impairment Loss		343	0	781
Goodwill, net		$ 9,469	9,819	9,878
Trading Symbol		TSN
Revision of Estimate	$ 30
Inventory Valuation Reserves		$ 138	115
Supplier Finance Program, Obligation		52	45
Supplier Finance Program, Obligation, Addition		288
Supplier Finance Program, Obligation, Settlement		$ (281)
Supplier Finance Program, Obligation, Statement of Financial Position [Extensible Enumeration]		Accounts payable
Goodwill, Written off Related to Sale of Business Unit		$ (4)	(63)
Indefinite-Lived Intangibles, Percentage of Fair Value in Excess of Carrying Amount		20.00%
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		20.00%
Government Assistance, Award Amount		$ 0
Chicken [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill, Impairment Loss		0
Goodwill, net		3,001	3,001	3,064
Goodwill, Written off Related to Sale of Business Unit		0	(63)
Selling, General and Administrative Expenses [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Advertising Expense		244	267	339
International Reporting Unit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill, Impairment Loss			238	238
Goodwill, net		200
Chicken Reporting Unit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill, Impairment Loss			210	210
Beef Reporting Unit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill, Impairment Loss		$ 343	$ 333	$ 333
Minimum | Customer Relationships
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finite-Lived Intangible Asset, Useful Life		7 years
Minimum | Buildings and Leasehold Improvments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life		10 years
Minimum | Machinery and equipment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life		3 years
Minimum | Land Improvements
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life		3 years
Maximum | Trademarks
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finite-Lived Intangible Asset, Useful Life		20 years
Maximum | Customer Relationships
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finite-Lived Intangible Asset, Useful Life		30 years
Maximum | Buildings and Leasehold Improvments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life		33 years
Maximum | Machinery and equipment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life		15 years
Maximum | Land Improvements
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, Plant and Equipment, Useful Life		20 years
Class A [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Basic (USD per share)		$ 1.37	$ 2.31	$ (1.87)
Class B [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Basic (USD per share)		$ 1.22	$ 2.06	$ (1.68)