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Share-based Payments | 9 Months Ended
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Jun. 30, 2025
Share-Based Payment Arrangement [Abstract] |
Share-based Payments | Share-based Payments The Company grants stock units to employees under its Performance Earnings Program (PEP), whereby units are earned and issued dependent upon meeting established cumulative performance objectives and vest over a three-year service period. Additionally, the Company issues restricted stock units to employees and directors which are earned based on service conditions. The grant date fair value of PEP awards and restricted stock unit awards is primarily based on that day’s closing market price of the Company’s common stock. Restricted stock units and PEP unit activity for the nine months ended June 30 was as follows:
| 2025 |  | 2024
| Restricted Stock Units |  | Weighted Average Grant-Date Fair Value |  | PEP Units |  | Weighted Average Grant-Date Fair Value |  | Restricted Stock Units |  | Weighted Average Grant-Date Fair Value |  | PEP Units |  | Weighted Average Grant-Date Fair Value
| (in millions) |  |  |  | (in millions) |  |  |  | (in millions) |  |  |  | (in millions) |  |
Outstanding at September 30, | 0.8 |  | $ | 83.96 |  |  | 0.7 |  | $ | 95.38 |  |  | 0.8 |  | $ | 68.34 |  |  | 0.7 |  | $ | 75.54 |
Granted | 0.2 |  | $ | 110.58 |  |  | 0.2 |  | $ | 129.24 |  |  | 0.3 |  | $ | 92.30 |  |  | 0.2 |  | $ | 104.82 |
PEP units earned | — |  | $ | — |  |  | 0.1 |  | $ | 85.46 |  |  | — |  | $ | — |  |  | 0.2 |  | $ | 52.49 |
Vested | (0.2) |  | $ | 75.70 |  |  | (0.3) |  | $ | 85.46 |  |  | (0.3) |  |  | $ | 50.04 |  |  | (0.4) |  |  | $ | 52.49 |
Cancelled | (0.1) |  | $ | 95.96 |  |  | 0.0 |  | $ | — |  |  | 0.0 |  | $ | — |  |  | 0.0 |  | $ | — |
Outstanding at June 30, | 0.7 |  | $ | 95.58 |  |  | 0.7 |  | $ | 109.67 |  |  | 0.8 |  | $ | 83.95 |  |  | 0.7 |  | $ | 95.37 |
Total compensation expense related to these share-based payments including stock options was $46.1 million and $44.8 million during the nine months ended June 30, 2025 and 2024, respectively. Unrecognized compensation expense related to total share-based payments outstanding as of June 30, 2025 and September 30, 2024 was $89.7 million and $68.7 million, respectively, to be recognized on a straight-line basis over the awards’ respective vesting periods which are generally three years.

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