Restructuring Charges (Schedule of Restructuring Activities and Related Accruals) (Details) - USD ($)	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Restructuring Reserve [Roll Forward]
Restructuring and related costs	$ 4,200,000	$ 6,800,000
Ending Balance	17,600,000
Restructuring and Related Cost, Expected Cost	11
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	20,700,000
Utilized - Cash Payments	(1,400,000)
Utilized - Non-Cash	(1,900,000)
Ending Balance	17,600,000
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	700,000
Utilized - Cash Payments	(2,300,000)
Utilized - Non-Cash	(1,400,000)
Ending Balance	0
Asset Impairment and Accelerated Depreciation [Member]
Restructuring Reserve [Roll Forward]
Utilized - Non-Cash	(1,000,000.0)
Ending Balance	$ 0