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Earnings per Share (Tables) | 6 Months Ended
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Mar. 31, 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 March 31, |  | Six Months Ended March 31,
(in millions, except share amounts) | 2025 |  | 2024 |  | 2025 |  | 2024
Numerator: |  |  |  |  |  |  |
Net income | $ | 71.7 |  |  | $ | 53.1 |  |  | $ | 156.8 |  |  | $ | 122.2 |
Less: Allocation to participating securities | (2.1) |  |  | (1.9) |  |  | (4.8) |  |  | (4.3) |
Net income allocated to common stockholders | $ | 69.6 |  |  | $ | 51.2 |  |  | $ | 152.0 |  |  | $ | 117.9 |
Denominator: |  |  |  |  |  |  |
Weighted average number of: |  |  |  |  |  |  |
Common shares outstanding | 46,789,431 |  |  | 45,710,784 |  |  | 46,602,574 |  |  | 45,529,236 |
Dilutive potential common shares outstanding: |  |  |  |  |  |  |
Share-based awards | 2,586,992 |  |  | 1,537,630 |  |  | 2,378,871 |  |  | 1,531,372 |
Diluted weighted-average common shares | 49,376,423 |  |  | 47,248,414 |  |  | 48,981,445 |  |  | 47,060,608 |

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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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