Net Loss Per Share - Narrative (Details) - shares shares in Millions |
3 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Stock-based awards | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Shares excluded from calculation of diluted shares outstanding (in shares) | 68.4 | 103.3 |
| Convertible senior notes | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Shares excluded from calculation of diluted shares outstanding (in shares) | 77.3 | 77.3 |