Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Sep. 30, 2025 |
|
| Significant Accounting Policies [Line Items] | |||||
| Software amortization | $ 0.8 | $ 0.9 | $ 2.6 | $ 2.9 | |
| Depreciation | 11.5 | $ 11.2 | 36.0 | $ 32.8 | |
| Reserve for Sales Returns, Current | $ 45.1 | $ 45.1 | $ 42.8 | ||
| Supplier Finance Program, Obligation, Statement of Financial Position [Extensible Enumeration] | Other liabilities | Other liabilities | Other current liabilities | ||
| X | ||||||||||
- Definition Reserve for Sales Returns, Current No definition available.
|
| X | ||||||||||
- Definition [Line Items] for Significant Accounting Policies [Table] No definition available.
|
| X | ||||||||||
- Definition Amount of expense for amortization of capitalized computer software costs. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Indicates line item in statement of financial position that includes obligation for supplier finance program. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|