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Earnings Per Share (Tables) | 12 Months Ended
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Mar. 31, 2018
Earnings Per Share [Abstract] |
Reconciliation From Basic To Diluted Average Common Shares And Net Earnings Per Common Share | The following table sets forth the reconciliation from basic to diluted weighted-average number of common shares outstanding and the calculations of net earnings per common share attributable to EnerSys stockholders.
|  | Fiscal year ended March 31,
|  | 2019 |  | 2018 |  | 2017
Net earnings attributable to EnerSys stockholders |  | $ | 160,239 |  |  | $ | 119,594 |  |  | $ | 160,214 |
Weighted-average number of common shares outstanding: |  |  |  |  |  |
Basic |  | 42,335,023 |  |  | 42,612,036 |  |  | 43,389,333 |
Dilutive effect of: |  |  |  |  |  |
Common shares from exercise and lapse of equity awards, net of shares assumed reacquired |  | 673,929 |  |  | 507,820 |  |  | 623,210 |
Diluted weighted-average number of common shares outstanding |  | 43,008,952 |  |  | 43,119,856 |  |  | 44,012,543 |
Basic earnings per common share attributable to EnerSys stockholders |  | $ | 3.79 |  |  | $ | 2.81 |  |  | $ | 3.69 |
Diluted earnings per common share attributable to EnerSys stockholders |  | $ | 3.73 |  |  | $ | 2.77 |  |  | $ | 3.64 |
Anti-dilutive equity awards not included in diluted weighted-average common shares |  | 355,728 |  |  | 59,482 |  |  | 1,295 |

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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://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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