Note 13 Stockholders' Equity (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Nov. 08, 2019	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017	Mar. 11, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance		9,500,000
Stock options and unvested restricted stock units outstanding		5,000,000.0
Number of Shares Available for Future Grant		4,500,000
Stock Repurchase Program, Authorized Amount				$ 200
Stock Repurchased During Period, Shares		300,000	5,000,000.0	4,300,000
Stock Repurchased During Period, Value		$ 7	$ 146	$ 160
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 101
Shares Issued During Three Year Period		7,000,000
Shares Repurchased During Three Year Period		10,000,000
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		207,000	334,000	549,000
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation		$ 6	$ 12	$ 17
2019 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance					4,000,000
Stock Plan Expiration Date		2028-12
Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchase Program Additional Authorized Amount	$ 200
Stock Repurchase Program, Authorized Amount	$ 301