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)