Restructuring and Transaction Activities, Restructuring Accrual Activity (Details) $ in Millions	9 Months Ended
	Jul. 03, 2021 USD ($)
Restructuring Accrual [Roll Forward]
Balance at September 26, 2020	$ 17
Charges	41
Non-cash items	(31)
Cash	(18)
Balance at July 3, 2021	9
Employee Severance and Benefits [Member]
Restructuring Accrual [Roll Forward]
Balance at September 26, 2020	10
Charges	7
Non-cash items	0
Cash	(14)
Balance at July 3, 2021	3
Facility Exit Costs [Member]
Restructuring Accrual [Roll Forward]
Balance at September 26, 2020	7
Charges	2
Non-cash items	0
Cash	(3)
Balance at July 3, 2021	6
Non-Cash Impairment Charges [Member]
Restructuring Accrual [Roll Forward]
Balance at September 26, 2020	0
Charges	1
Non-cash items	(1)
Cash	0
Balance at July 3, 2021	0
Transaction Activities [Member]
Restructuring Accrual [Roll Forward]
Balance at September 26, 2020	0
Charges	31
Non-cash items	(30)
Cash	(1)
Balance at July 3, 2021	$ 0