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Earnings Per Share (Schedule of Treasury Stock Shares Held for Deferred Compensation Included in Basic and Diluted Shares Outstanding) (Details) - shares shares in Thousands | 3 Months Ended | 6 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021
Earnings Per Share [Abstract] |  |  |  |
Weighted-average treasury stock shares held for deferred compensation obligations | 153 | 196 | 158 | 197

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- Definition Weighted-average number of shares of treasury stock held for deferred compensation determined by relating the portion of time within a reporting period that treasury stock shares held for deferred compensation have been outstanding to the total time in that period. Treasury stock shares held for deferred compensation shares are shares of company stock, issued to a trust (for example a 'rabbi trust') set up specifically to accumulate stock or other investments for the purpose of deferring taxable income to participating employees until the stock or other investments are distributed to the participating employees. These shares are included in basic and diluted shares in the calculation of earnings per share. + References No definition available. + Details
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