Restructuring Charges (Schedule of Restructuring Activities and Related Accruals) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Restructuring Reserve [Roll Forward]
Beginning Balance			$ 2,500,000
Restructuring and related costs	$ 3,100,000	$ 3,900,000	9,100,000	$ 9,800,000
Utilized - Cash Payments			(10,400,000)
Ending Balance	1,200,000		1,200,000
Restructuring and Related Cost, Expected Cost	18		18
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			1,700,000
Restructuring and related costs			4,100,000
Utilized - Cash Payments			(4,700,000)
Ending Balance	1,100,000		1,100,000
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			800,000
Restructuring and related costs			4,700,000
Utilized - Cash Payments			(5,400,000)
Ending Balance	100,000		100,000
Asset Impairment and Accelerated Depreciation [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			0
Restructuring and related costs			300,000
Utilized - Cash Payments			(300,000)
Ending Balance	$ 0		$ 0