Share-based Compensation - Summary of Class B Common Stock, Issued as Incentive Awards, Activity (Detail) - Incentive Awards [Member] - Common Class B [Member] |
3 Months Ended |
|---|---|
|
Dec. 31, 2024
$ / shares
shares
| |
| Schedule of Non Vested Share Activity [Line Items] | |
| Shares outstanding beginning (in shares) | shares | 0 |
| Shares granted (in shares) | shares | 12,321,282 |
| Shares vested (in shares) | shares | (11,070,502) |
| Shares forfeited (in shares) | shares | (7,074) |
| Shares outstanding ending (in shares) | shares | 1,243,706 |
| Shares outstanding beginning (in dollars per share) | $ / shares | |
| Shares granted (in dollars per share) | $ / shares | 12.67 |
| Shares vested (in dollars per share) | $ / shares | 12.6 |
| Shares forfeited (in dollars per share) | $ / shares | 13.3 |
| Shares outstanding ending (in dollars per share) | $ / shares | $ 13.3 |