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Restructuring and Impairment Charges, Restructuring Accrual Activity (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018	Sep. 29, 2018
Restructuring Accrual [Roll Forward]
Beginning balance			$ 13
Charges	$ 2	$ 7	18	$ 33
Non-cash asset impairment			(7)		$ 0
Cash payments			(16)
Ending balance	8		8		13
Employee Severance and Benefits [Member]
Restructuring Accrual [Roll Forward]
Beginning balance			9
Charges			7
Non-cash asset impairment			0
Cash payments			(13)
Ending balance	3		3		9
Facility Exit Costs [Member]
Restructuring Accrual [Roll Forward]
Beginning balance			4
Charges			4
Non-cash asset impairment			0
Cash payments			(3)
Ending balance	5		5		4
Non-Cash Impairment Charges [Member]
Restructuring Accrual [Roll Forward]
Beginning balance			0
Charges			7
Non-cash asset impairment			(7)
Cash payments			0
Ending balance	$ 0		$ 0		$ 0