EARNINGS PER SHARE - Antidilutive shares excluded from earnings per share (Details) - shares shares in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Restricted stock units | ||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share | ||||
| Antidilutive securities excluded from computation of earnings per share, amount | 0.7 | 0.0 | 0.4 | 0.0 |
| Performance-based restricted stock units | ||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share | ||||
| Antidilutive securities excluded from computation of earnings per share, amount | 0.5 | 0.0 | 0.4 | 0.0 |
| BRBR Stock Option | ||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share | ||||
| Antidilutive securities excluded from computation of earnings per share, amount | 0.2 | 0.0 | 0.1 | 0.0 |