Share-Based Compensation (Schedule Of Stock Options Awarded Under The Option Plans) (Details) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
Jun. 30, 2011
Share-Based Compensation
Stock options Outstanding, Shares	761,931
Stock options Granted, Shares
Stock options Exercised, Shares	(66,724)
Stock options Cancelled, Shares	(215,632)
Stock options Outstanding, Shares	479,575
Stock options Exercisable, Shares	441,260
Stock options Outstanding, Weighted Avg. Price	$ 35.15
Stock options Granted, Weighted Avg. Price
Stock options Exercised, Weighted Avg. Price	$ 13.36
Stock options Cancelled, Weighted Avg. Price	$ 44.60
Stock options Outstanding, Weighted Avg. Price	$ 33.92
Stock options Exercisable, Weighted Avg. Price	$ 33.63
Stock options Exercised, Aggregate Intrinsic Value	$ 1.7
Stock options Outstanding, Aggregate Intrinsic Value	3.3
Stock options Exercisable, Aggregate Intrinsic Value	$ 3.3
Stock options Outstanding, Weighted Avg. Remaining Contractual Life, Years	1.0

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options outstanding and currently exercisable under the option plan as of the balance sheet date.

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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 total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

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The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

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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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The weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period.

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

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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 stock options awarded under the plan during the reporting period.

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options outstanding under the plan as of the balance sheet date.

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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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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

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

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