Share-Based Compensation (Schedule Of Stock Options Awarded Under The Option Plans) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
Dec. 31, 2012
Share-Based Compensation [Abstract]
Stock options, Shares, October 1, 2012	125,816
Stock options Granted, Shares
Stock options Exercised, Shares	(15,500)
Stock options Cancelled / Expired, Shares	(5,850)
Stock options, Shares, December 31, 2012	104,466
Stock options Exercisable, Shares	103,799
Stock options Estimated Weighted Avg. Price, October 1, 2012	$ 36.29
Stock options Granted, Estimated Weighted Avg. Price
Stock options Exercised, Estimated Weighted Avg. Price	$ 34.68
Stock options Cancelled / Expired, Estimated Weighted Avg. Price	$ 37.24
Stock options Estimated Weighted Avg. Price, December 31, 2012	$ 36.48
Stock options Exercisable, Estimated Weighted Avg. Price	$ 36.50
Stock options Exercised, Aggregate Intrinsic Value	$ 0
Stock options Outstanding at December 31, 2012, Aggregate Intrinsic Value	0.1
Stock options Exercisable at December 31, 2012, Aggregate Intrinsic Value	$ 0.1
Stock options Outstanding at December 31, 2012, Weighted Average Remaining Contractual Life	1 year

Share-based Compensation Arrangement By Share based Payment Award Options Exercised Intrinsic Value

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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Number of share options (or share units) exercised during the current period.

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