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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)