Restructuring and Transaction Activities, Restructuring Accrual Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Sep. 28, 2019
Restructuring Accrual [Roll Forward]
Balance at beginning of fiscal year	$ 17	$ 7
Charges	51	79
Non-cash asset impairment	(1)	(2)	$ (8)
Cash	(56)
Cash		(67)
Balance at end of fiscal year	11	17	7
Cumulative costs since 2019	86
Employee Severance and Benefits [Member]
Restructuring Accrual [Roll Forward]
Balance at beginning of fiscal year	10	2
Charges	11	34
Non-cash asset impairment	0	0
Cash	(15)	(26)
Balance at end of fiscal year	6	10	2
Facility Exit Costs [Member]
Restructuring Accrual [Roll Forward]
Balance at beginning of fiscal year	7	5
Charges	7	9
Non-cash asset impairment	0	0
Cash	(9)	(7)
Balance at end of fiscal year	5	7	5
Non-Cash Impairment Charges [Member]
Restructuring Accrual [Roll Forward]
Balance at beginning of fiscal year	0	0
Charges	1	2
Non-cash asset impairment	(1)	(2)
Cash	0	0
Balance at end of fiscal year	0	0	0
Transaction Activities [Member]
Restructuring Accrual [Roll Forward]
Balance at beginning of fiscal year	0	0
Charges	32	34
Non-cash asset impairment	0	0
Cash	(32)
Cash		(34)
Balance at end of fiscal year	$ 0	$ 0	$ 0