Note 9 Stock Repurchase (Details) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Stockholders' Equity Note [Abstract]
Treasury Stock, Shares, Acquired	3,800,000
Treasury Stock, Value, Acquired, Cost Method	$ 109
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 144
Shares Paid for Tax Withholding for Share Based Compensation	304,000	453,000
Amount of Tax Withholding for Share-based Compensation	$ 11	$ 14