Note 10 Stockholders' Equity (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015	Oct. 03, 2009
Stockholders' Equity Note [Abstract]
Number of Shares Authorized	23,500,000	23,500,000			7,500,000
Common Stock, Capital Shares Reserved for Future Issuance	10,200,000	10,200,000
Stock options and unvested restricted stock units outstanding	6,900,000	6,900,000
Number of Shares Available for Future Grant	3,300,000	3,300,000
Stock Repurchase Program Additional Authorized Amount	$ 200.0
Stock Repurchased During Period, Shares		4,300,000	6,800,000
Stock Repurchased During Period, Value		$ 159.7	$ 141.2
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 253.2	$ 253.2
Shares Paid for Tax Withholding for Share Based Compensation		549,000	46,000	61,000
Adjustments Related to Tax Withholding for Share-based Compensation		$ 17.3	$ 1.0	$ 1.5