Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended			4 Months Ended	9 Months Ended
	Jul. 08, 2018	Apr. 15, 2018	Jul. 09, 2017	Jan. 21, 2018	Jul. 08, 2018	Jul. 09, 2017
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired					2.3
Treasury Stock, Value, Acquired, Cost Method					$ 200,000,000
Cash dividends declared per common share	$ 0.4	$ 0.40	$ 0.40	$ 0.40	$ 1.20	$ 1.20
Dividends, common stock					$ 35,000,000
Expiration: November 2019 [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount	$ 200,000,000.0				200,000,000.0
Expiration: November 2018
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock, remaining authorized amount	$ 181,000,000				$ 181,000,000