Note 12 Stockholders' Equity (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2009
Stockholders' Equity Note [Abstract]
Number of Shares Authorized		25,300,000			7,500,000
Common Stock, Capital Shares Reserved for Future Issuance		10,100,000
Stock options and unvested restricted stock units outstanding		6,600,000
Number of Shares Available for Future Grant		3,500,000
Stock Repurchase Program Additional Authorized Amount	$ 200
Stock Repurchased During Period, Shares		5,000,000	4,300,000	6,800,000
Stock Repurchased During Period, Value		$ 146	$ 160	$ 141
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 108
Shares Paid for Tax Withholding for Share Based Compensation		334,000	549,000	46,000
Adjustments Related to Tax Withholding for Share-based Compensation		$ 12	$ 17	$ 1