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v3.26.1

Stockholders' Equity (Summary of Activity in Common Stock and Treasury Stock Shares) (Details) - shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2026 | Mar. 31, 2025
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Balance, Common Stock, shares |  |  | 72,960,000 |
Balance, Treasury Stock, shares |  |  | (13,060,000) |
Balance, Treasury stock held for deferred compensation, shares |  |  | (28,000) |
Balance, Common Stock, shares | 72,960,000 |  | 72,960,000 |
Balance, Treasury Stock, shares | (13,367,000) |  | (13,367,000) |
Balance, Treasury stock held for deferred compensation, shares | (27,000) |  | (27,000) |
Common Stock [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Balance, Common Stock, shares | 72,960,000 | 72,960,000 | 72,960,000 | 72,960,000
Balance, Common Stock, shares | 72,960,000 | 72,960,000 | 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 | (13,174,000) | (13,607,000) | (13,060,000) | (13,787,000)
Purchase of treasury stock, shares | (631,000) | (243,000) | (1,086,000) | (449,000)
Sales of treasury stock, shares | 360,000 | 344,000 | 701,000 | 725,000
Common shares issued for benefit plans, shares | 78,000 | 126,000 | 78,000 | 131,000
Balance, Treasury Stock, shares | (13,367,000) | (13,380,000) | (13,367,000) | (13,380,000)
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 | (28,000) | (31,000) | (28,000) | (45,000)
Purchases of stock by deferred compensation, shares |  |  | (1,000) | (1,000)
Distribution of stock from deferred compensation, shares | 1,000 | 1,000 | 2,000 | 16,000
Balance, Treasury stock held for deferred compensation, shares | (27,000) | (30,000) | (27,000) | (30,000)

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