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Earnings Per Share (Tables) | 9 Months Ended
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Jun. 30, 2023
Earnings Per Share |
Schedule of reconciliation of the denominators for basic and diluted EPS | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended
​ | ​ | June 30, | ​ | June 30, |  | June 30, |  | June 30,
​ |  | 2023 |  | 2022 |  | 2023 |  | 2022
​ | ​ | (in millions)
Denominator for basic earnings per share | ​ | 138.7 | ​ | 140.6 | ​ | 138.8 | ​ | 141.1
Potential common shares | ​ | — | ​ | 1.6 | ​ | 1.5 | ​ | 2.0
Denominator for diluted earnings per share | ​ | 138.7 | ​ | 142.2 | ​ | 140.3 | ​ | 143.1

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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