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Stockholders' Equity (Summary of Activity in Common Stock and Treasury Stock Shares) (Details) - shares | 3 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Balance, Common Stock, shares | 72,960,000 |
Balance, Treasury Stock, shares | (13,787,000) |
Balance, Treasury stock held for deferred compensation, shares | (45,000) |
Balance, Common Stock, shares | 72,960,000 |
Balance, Treasury Stock, shares | (13,607,000) |
Balance, Treasury stock held for deferred compensation, shares | (31,000) |
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 | (13,787,000) | (13,070,000)
Sales of treasury stock, shares | 381,000 | 247,000
Purchase of treasury stock, shares | (206,000) |
Common shares issued for benefit plans, shares | 5,000 |
Balance, Treasury Stock, shares | (13,607,000) | (12,823,000)
Treasury Stock Held for Deferred Compensation [Member] |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Balance, Treasury stock held for deferred compensation, shares | (45,000) | (55,000)
Purchases of stock by deferred compensation, shares | (1,000) | (1,000)
Distribution of stock from deferred compensation, shares | 15,000 | 2,000
Balance, Treasury stock held for deferred compensation, shares | (31,000) | (54,000)

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