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	6 Months Ended
	Mar. 30, 2012 Y
Share-based Compensation [Abstract]
Shares, Stock Options outstanding at September 30, 2011	5,801
Shares, Grants	2,086
Shares, Exercises	(181)
Shares, Forfeitures and cancellations	(269)
Shares, Stock options outstanding at March 30, 2012	7,437
Shares, Stock options vested March 30, 2012 and expected to vest	7,143
Shares, Stock options exercisable at March 30, 2012	3,355
Weighted Average Exercise Price, Stock options outstanding at September 30, 2011	$ 45.19
Weighted Average Exercise Price, Grants	$ 31.55
Weighted Average Exercise Price, Exercises	$ 24.34
Weighted Average Exercise Price, Forfeitures and cancellations	$ 51.49
Weighted Average Exercise Price, Stock options outstanding at March 30, 2012	$ 41.64
Weighted Average Exercise Price, Stock options vested March 30, 2012 and expected to vest	$ 41.61
Weighted Average Exercise Price, Stock options exercisable at March 30, 2012	$ 40.27
Weighted Average Remaining Contractual Life, Stock options outstanding at March 30, 2012	7.8
Weighted Average Remaining Contractual Life, Stock options vested March 30, 2012 and expected to vest	7.7
Weighted Average Remaining Contractual Life, Stock options exercisable at March 30, 2012	6.3
Aggregate Intrinsic Value, Stock options outstanding at March 30, 2012	$ 34,766
Aggregate Intrinsic Value, Stock options vested March 30, 2012 and expected to vest	33,732
Aggregate Intrinsic Value, Stock options exercisable at March 30, 2012	$ 19,438