Restructuring and Related Charges Restructuring (Details) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2020 USD ($)	Mar. 30, 2019 USD ($)	Mar. 28, 2020 USD ($)	Mar. 30, 2019 USD ($)	Sep. 28, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 319		$ 319
Restructuring and Related Cost, Incurred Cost	0		(52)
Restructuring and Related Cost, Cost Incurred to Date	302		302
Payments for Restructuring			$ 18
Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated			500
2017 Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	280		$ 280
Restructuring and Related Cost, Cost Incurred to Date	263		263
Financial Fitness Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	34		34		$ 0
Cost of Sales | Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	(4)		(5)
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost			(47)
Selling, General and Administrative Expenses [Member] | Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	(1)		(34)
Employee Severance [Member] | Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost			(39)
Restructuring Reserve, Accrual Adjustment	5
Technology Impairment and Related Costs [Member] | 2017 Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	17		17
Restructuring and Related Cost, Incurred Cost	(5)		(13)
Technology Impairment and Related Costs [Member] | Selling, General and Administrative Expenses [Member] | 2017 Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		$ (8)		$ (16)
Beef [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	18		18
Restructuring and Related Cost, Incurred Cost	0		(5)
Restructuring and Related Cost, Cost Incurred to Date	18		18
Pork [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	7		7
Restructuring and Related Cost, Incurred Cost	0		(2)
Restructuring and Related Cost, Cost Incurred to Date	7		7
Chicken [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	136		136
Restructuring and Related Cost, Incurred Cost	0		(21)
Restructuring and Related Cost, Cost Incurred to Date	128		128
Prepared Foods [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	155		155
Restructuring and Related Cost, Incurred Cost	0		(22)
Restructuring and Related Cost, Cost Incurred to Date	146		146
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	3		3
Restructuring and Related Cost, Incurred Cost	0		(2)
Restructuring and Related Cost, Cost Incurred to Date	$ 3		$ 3