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Earnings Per Share (Tables) | 12 Months Ended
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Sep. 30, 2020
Earnings Per Share |
Reconciliation of the denominators for basic and diluted EPS | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fiscal Year Ended
​ | ​ | September 30, |  | September 30, |  | September 30,
​ | ​ | 2020 | ​ | 2019 | ​ | 2018
​ | ​ | (in millions)
Denominator for basic earnings per share |  | 159.0 |  | 157.0 |  | 159.1
Potential common shares |  | 2.3 |  | 2.7 |  | 3.2
Denominator for diluted earnings per share |  | 161.3 |  | 159.7 |  | 162.3

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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