Accounting Policies Changes in Accounting Principles (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, General and Administrative	$ 472	$ 682
Operating Income (Loss)	705	758
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	616	657
Income Tax Expense	144	148
Net Income	472	509
Net income attributable to Tyson	$ 467	$ 505
Diluted (USD per share)	$ 1.28	$ 1.38
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 549	$ 547
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	544	543
Inventory, Net	3,915	4,057	$ 3,859
Assets, Current	8,544	6,946	7,598
Assets	35,458	33,564	34,456
Deferred Income Taxes	2,331	2,306	2,317
Retained earnings	(15,399)	(13,994)	(15,100)
Total Tyson Shareholders’ Equity	15,638	14,235	15,254
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	15,781	14,382	15,386
Liabilities and Equity	35,458	33,564	34,456
Deferred income taxes	17	(13)
Increase (Decrease) in Operating Capital	$ 580	$ 83
Class A [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Basic (USD per share)	$ 1.31	$ 1.42
Total Tyson Shareholders’ Equity	$ 38	$ 38	38	$ 38
Class B [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Basic (USD per share)	$ 1.18	$ 1.27
Total Tyson Shareholders’ Equity	$ 7	$ 7	$ 7	7
Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, General and Administrative		614
Operating Income (Loss)		826
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		725
Income Tax Expense		164
Net Income		561
Net income attributable to Tyson		$ 557
Diluted (USD per share)		$ 1.52
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest		$ 599
Comprehensive Income (Loss), Net of Tax, Attributable to Parent		595
Inventory, Net		4,304
Assets, Current		7,193
Assets		33,811
Deferred Income Taxes		2,369
Retained earnings		(14,178)
Total Tyson Shareholders’ Equity		14,419
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		14,566
Liabilities and Equity		33,811
Deferred income taxes		3
Increase (Decrease) in Operating Capital		$ 15
Previously Reported [Member] | Class A [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Basic (USD per share)		$ 1.56
Previously Reported [Member] | Class B [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Basic (USD per share)		$ 1.40
Revision of Prior Period, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, General and Administrative		$ 68
Operating Income (Loss)		(68)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		(68)
Income Tax Expense		(16)
Net Income		(52)
Net income attributable to Tyson		$ (52)
Diluted (USD per share)		$ (0.14)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest		$ (52)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent		(52)
Inventory, Net		(247)
Assets, Current		(247)
Assets		(247)
Deferred Income Taxes		(63)
Retained earnings		184		$ (132)
Total Tyson Shareholders’ Equity		(184)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		(184)
Liabilities and Equity		(247)
Deferred income taxes		(16)
Increase (Decrease) in Operating Capital		$ 68
Revision of Prior Period, Adjustment [Member] | Class A [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Basic (USD per share)		$ (0.14)
Revision of Prior Period, Adjustment [Member] | Class B [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Basic (USD per share)		$ (0.13)