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EARNINGS PER COMMON SHARE (Tables) | 12 Months Ended
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Sep. 30, 2017
Earnings Per Share [Abstract] |
Earnings Per Common Share |
| 2017 |  | 2016 |  | 2015
Basic EPS: |  |  |  |  |
Net Income | $ | 161.6 |  |  | $ | 144.2 |  |  | $ | 136.9 |
Less: Income allocated to participating securities | 0.4 |  |  | 0.5 |  |  | 0.5 |
Net Income Available to Common Shareholders | $ | 161.2 |  |  | $ | 143.7 |  |  | $ | 136.4 |
Weighted Average Shares Outstanding (millions) | 46.9 |  |  | 44.1 |  |  | 43.2 |
Earnings Per Share of Common Stock | $ | 3.44 |  |  | $ | 3.26 |  |  | $ | 3.16 |
Diluted EPS: |  |  |  |  |
Net Income | $ | 161.6 |  |  | $ | 144.2 |  |  | $ | 136.9 |
Less: Income allocated to participating securities | 0.4 |  |  | 0.5 |  |  | 0.5 |
Net Income Available to Common Shareholders | $ | 161.2 |  |  | $ | 143.7 |  |  | $ | 136.4 |
Weighted Average Shares Outstanding (millions) | 46.9 |  |  | 44.1 |  |  | 43.2 |
Dilutive Effect of Stock Options, Restricted Stock, and Restricted Stock Units (millions) | 0.1 |  |  | 0.2 |  |  | 0.1 |
Weighted Average Diluted Shares (millions) | 47.0 |  |  | 44.3 |  |  | 43.3 |
Earnings Per Share of Common Stock | $ | 3.43 |  |  | $ | 3.24 |  |  | $ | 3.16 |
Outstanding Shares (in millions) Excluded from the Calculation of Diluted EPS Attributable to: |  |  |  |  |
Restricted stock and stock units subject to performance and/or market conditions | 0.5 |  |  | 0.3 |  |  | 0.3 |

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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/2003/role/presentationRef -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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