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 | |