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Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 30, 2017	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Income Tax Disclosure [Line Items]
Federal income tax rate	35.00%	21.00%		24.50%	35.00%	35.00%
Tax Benefit from Deferred Tax Remeasurement				$ 1,004
Impact of the Tax Act				$ 35
Impairment and Sale of Non-Protein Businesses				3.10%	0.00%	0.00%
Domestic production deduction				$ 46	$ 80	$ 68
State Income Taxes				90	61	70
Income (Loss) from Continuing Operations before Income Taxes, Domestic				2,700	2,603	$ 2,543
Tax credit carryforwards		$ 47		47
Accumulated undistributed earnings of foreign subsidiaries		210		210	182
Unrecognized tax benefits that would impact effective tax rate		216		216	205
Unrecognized tax benefits, income tax penalties and interest accrued		73		73	$ 63
Decrease in Unrecognized Tax Benefits is Reasonably Possible		28		28
Expire in fiscal 2019 - 2031 [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforwards		43		43
State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards		662		662
Foreign Country [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards		46		46
Expire in fiscal years 2019-2028 [Member] | Foreign Country [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards		$ 41		$ 41
Scenario, Forecast [Member]
Income Tax Disclosure [Line Items]
Federal income tax rate			21.00%

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