Derivative Financial Instruments - Additional Information (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Derivative [Line Items] | ||||
| Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Net | $ (0.6) | $ 1.1 | $ (2.5) | $ 0.0 |
| Maximum | Forward contracts | Not Designated as Hedging Instrument | ||||
| Derivative [Line Items] | ||||
| Derivative, remaining maturity | 3 months | 3 months | ||
| Maximum | Forward contracts | Designated as Hedging Instrument | Net Investment Hedging | ||||
| Derivative [Line Items] | ||||
| Derivative, remaining maturity | 3 months | 3 months | ||
| Maximum | Options | Not Designated as Hedging Instrument | ||||
| Derivative [Line Items] | ||||
| Derivative, remaining maturity | 14 months | 14 months | ||