Stock-Based Compensation (Summary Of Restricted Stock Units Issued To Officers, Directors, And Employees Under 2005 Stock Incentive Plan) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
Mar. 30, 2012
Share-based Compensation [Abstract]
Shares, Non-vested at September 30, 2011	946
Shares, Granted	1,082
Shares, Vested	(336)
Shares, Forfeitures and cancellations	(47)
Shares, Non-vested at March 30, 2012	1,645
Weighted Average Fair Value, Non-vested at September 30, 2011	$ 53.71
Weighted Average Fair Value, Granted	$ 32.08
Weighted Average Fair Value, Vested	$ 51.44
Weighted Average Fair Value, Forfeitures and cancellations	$ 48.00
Weighted Average Fair Value, Non-vested at March 30, 2012	$ 40.11

Stock-Based Compensation (Summary Of Restricted Stock Units Issued To Officers, Directors, And Employees Under 2005 Stock Incentive Plan) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified

6 Months Ended

Mar. 30, 2012

Shares, Non-vested at September 30, 2011

946

Shares, Granted

1,082

Shares, Vested

(336)

Shares, Forfeitures and cancellations

(47)

Shares, Non-vested at March 30, 2012

1,645

Weighted Average Fair Value, Non-vested at September 30, 2011

$ 53.71

Weighted Average Fair Value, Granted

$ 32.08

Weighted Average Fair Value, Vested

$ 51.44

Weighted Average Fair Value, Forfeitures and cancellations

$ 48.00

Weighted Average Fair Value, Non-vested at March 30, 2012

$ 40.11

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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