Retirement And Other Benefit Plans (Schedule Of Weighted-Average Assumptions Used To Determine The Net Periodic Benefit Cost For Pension Plans) (Details)	12 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Net Periodic Benefit Cost [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Discount rate	5.00%	5.50%	7.25%
Rate of increase in compensation levels	0.00%	0.00%	0.00%
Expected long-term rate of return on assets	8.00%	8.00%	8.25%
Net Periodic Benefit Obligations [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Net periodic benefit obligations, Discount rate	4.50%	5.00%
Net periodic benefit obligations, Rate of increase in compensation levels	0.00%	0.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The interest rate used to adjust for the time value of money for the plan.

+ References

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- Definition

Expected rate of compensation increases (for pay-related plans).

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The interest rate used to adjust for the time value of money.

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- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

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Expected rate of compensation increases (for pay-related plans).

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