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Stockholders' Equity (Summary of Common Stock and Treasury Stock Share Activity) (Details) - shares | 3 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Balance, Common Stock, shares | 72,960,000 |
Balance, Treasury Stock, shares | (13,070,000) |
Balance, Treasury stock held for deferred compensation, shares | (55,000) |
Balance, Common Stock, shares | 72,960,000 |
Balance, Treasury Stock, shares | (12,823,000) |
Balance, Treasury stock held for deferred compensation, shares | (54,000) |
Common Stock [Member] |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Balance, Common Stock, shares | 72,960,000 | 72,960,000
Balance, Common Stock, shares | 72,960,000 | 72,960,000
Treasury Stock at Cost [Member] |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Balance, Treasury Stock, shares | (13,070,000) | (13,207,000)
Sales of treasury stock, shares | 247,000 | 19,000
Purchase of treasury stock, shares |  | (274,000)
Common shares issued for benefit plans, shares |  | 2,000
Balance, Treasury Stock, shares | (12,823,000) | (13,460,000)
Treasury Stock Held for Deferred Compensaton [Member] |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Balance, Treasury stock held for deferred compensation, shares | (55,000) | (139,000)
Purchases of stock by deferred compensation, shares | (1,000) | (1,000)
Distribution of stock from deferred compensation, shares | 2,000 | 18,000
Balance, Treasury stock held for deferred compensation, shares | (54,000) | (122,000)

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