Stockholders' Equity and Stock-Based Compensation (Summary Of Stock Options Issued To Officers, Directors, And Employees Under 2000 Stock Incentive Plan And 2005 Stock Plan) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 29, 2013		Sep. 28, 2012
Share-based Compensation [Abstract]
Shares, Stock Options outstanding at September 28, 2012			4,622
Shares, Grants			2,275	[1]
Shares, Exercises			(204)
Shares, Forfeitures and cancellations			(170)
Shares, Stock options outstanding at December 28, 2012	6,523
Shares, Stock options vested December 28, 2012 and expected to vest	6,266
Shares, Stock options exercisable at December 28, 2012	2,562
Weighted Average Exercise Price, Stock options outstanding at September 28, 2012			$ 32.50
Weighted Average Exercise Price, Grants	$ 30.18	[1]
Weighted Average Exercise Price, Exercises	$ 19.60
Weighted Average Exercise Price, Forfeitures and cancellations	$ 41.92
Weighted Average Exercise Price, Stock options outstanding at December 28, 2012	$ 29.63
Weighted Average Exercise Price, Stock options vested December 28, 2012 and expected to vest	$ 29.58
Weighted Average Exercise Price, Stock options exercisable at December 28, 2012	$ 28.03
Weighted Average Remaining Contractual Life, Stock options outstanding at December 28, 2012	7,900
Weighted Average Remaining Contractual Life, Stock options vested December 28, 2012 and expected to vest			7,800
Weighted Average Remaining Contractual Life, Stock options exercisable at December 28, 2012			5,700
Aggregate Intrinsic Value, Stock options excercises	$ 2,602
Aggregate Intrinsic Value, Stock options outstanding at December 28, 2012	31,220
Aggregate Intrinsic Value, Stock options vested December 28, 2012 and expected to vest	30,319
Aggregate Intrinsic Value, Stock options exercisable at December 28, 2012	$ 17,237

[1] Includes the additional shares of our common stock issuable upon the exercise of those options subject to the equity award modification that occurred in the first quarter of fiscal 2013 in connection with the special cash dividend.