Stockholders' Equity Stockholders' Equity(Details) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended			4 Months Ended	12 Months Ended
	Sep. 27, 2015	Jul. 05, 2015	Apr. 12, 2015	Jan. 18, 2015	Sep. 27, 2015	Sep. 28, 2014	Sep. 29, 2013	Sep. 21, 2015	May. 07, 2015	Nov. 13, 2014	Jul. 31, 2014	Feb. 10, 2014
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount								$ 200,000,000	$ 0	$ 100,000,000	$ 100,000,000	$ 200,000,000
Treasury Stock, Shares, Acquired					3.7
Treasury Stock, Value, Acquired, Cost Method					$ 317,051,000	$ 319,690,000	$ 140,121,000
Common Stock, Dividends, Per Share, Declared	$ 0.3	$ 0.30	$ 0.2	$ 0.20	$ 1.00	$ 0.40	$ 0
Dividends, Common Stock					$ 37,590,000
Expiration: November 2017 [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 200,000,000				200,000,000
Expiration: November 2016 [Member] [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 25,500				25,500
Treasury Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method					$ 317,051,000	$ 319,690,000	$ 140,121,000