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Earnings Per Share (Tables) | 12 Months Ended
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Mar. 31, 2018
Earnings Per Share [Abstract] |
Components of basic and diluted earnings per share | The components of basic and diluted earnings per share were as follows:
|  | Years ended March 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Basic Earnings Per Share: |  |  |  |  |  |  |  |  |
Net earnings (loss) attributable to Modine |  | $ | 22.2 |  |  | $ | 14.2 |  |  | $ | (1.6 | )
Less: Undistributed earnings attributable to unvested shares |  |  | (0.2 | ) |  |  | (0.2 | ) |  |  | - |
Net earnings (loss) available to Modine shareholders |  | $ | 22.0 |  |  | $ | 14.0 |  |  | $ | (1.6 | )
Weighted-average shares outstanding - basic |  |  | 49.9 |  |  |  | 47.8 |  |  |  | 47.3 |
Net earnings (loss) per share - basic |  | $ | 0.44 |  |  | $ | 0.29 |  |  | $ | (0.03 | )
Diluted Earnings Per Share: |  |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) attributable to Modine |  | $ | 22.2 |  |  | $ | 14.2 |  |  | $ | (1.6 | )
Less: Undistributed earnings attributable to unvested shares |  |  | (0.1 | ) |  |  | (0.1 | ) |  |  | - |
Net earnings (loss) available to Modine shareholders |  | $ | 22.1 |  |  | $ | 14.1 |  |  | $ | (1.6 | )
Weighted-average shares outstanding - basic |  |  | 49.9 |  |  |  | 47.8 |  |  |  | 47.3 |
Effect of dilutive securities |  |  | 1.0 |  |  |  | 0.5 |  |  |  | - |
Weighted-average shares outstanding - diluted |  |  | 50.9 |  |  |  | 48.3 |  |  |  | 47.3 |
Net earnings (loss) per share - diluted |  | $ | 0.43 |  |  | $ | 0.29 |  |  | $ | (0.03 | )

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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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