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Earnings per Share (Tables) | 9 Months Ended
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Jun. 30, 2025
Earnings Per Share [Abstract] |
Schedule of Calculation of Numerator and Denominator in Earnings per Share | The following is a reconciliation of the numerator and denominator of the diluted earnings per share computations for the periods presented below.
| Three Months Ended June 30, |  | Nine Months Ended June 30,
(in millions, except share amounts) | 2025 |  | 2024 |  | 2025 |  | 2024
Numerator: |  |  |  |  |  |  |
Net income | $ | 63.4 |  |  | $ | 61.9 |  |  | $ | 220.2 |  |  | $ | 184.1 |
Less: Allocation to participating securities | (2.4) |  |  | (2.2) |  |  | (7.3) |  |  | (6.5) |
Net income allocated to common stockholders | $ | 61.0 |  |  | $ | 59.7 |  |  | $ | 212.9 |  |  | $ | 177.6 |
Denominator: |  |  |  |  |  |  |
Weighted average number of: |  |  |  |  |  |  |
Common shares outstanding | 47,115,819 |  |  | 45,964,905 |  |  | 46,773,656 |  |  | 45,673,929 |
Dilutive potential common shares outstanding: |  |  |  |  |  |  |
Share-based awards | 2,836,345 |  |  | 1,649,643 |  |  | 2,529,074 |  |  | 1,557,126 |
Diluted weighted-average common shares | 49,952,164 |  |  | 47,614,548 |  |  | 49,302,730 |  |  | 47,231,055 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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