Stockholders' Equity (Narrative) (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	12 Months Ended							12 Months Ended			4 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012	Jul. 31, 2014	Feb. 10, 2014	Aug. 01, 2013	Nov. 12, 2012	Sep. 28, 2014 Treasury Stock [Member]	Sep. 29, 2013 Treasury Stock [Member]	Sep. 30, 2012 Treasury Stock [Member]	Jan. 18, 2015 Subsequent Event [Member]	Nov. 13, 2014 Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock, authorized amount				$ 100,000,000	$ 200,000,000	$ 100,000,000	$ 100,000,000					$ 100,000,000
Treasury Stock, Shares, Acquired	5.6
Common stock repurchased, aggregate cost	323,866,000	132,833,000	30,013,000					319,690,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	117,100,000
Treasury Stock, Value, Acquired, Cost Method	319,690,000	140,121,000	30,013,000						140,121,000	30,013,000
Common Stock, Dividends, Per Share, Cash Paid	$ 0.40	$ 0.00	$ 0.00
Dividends, Common Stock, Cash	$ 15,900,000
Common Stock, Dividends, Per Share, Declared											$ 0.20