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Acquisitions - (Pro Forma Information) (Details) - Alpha $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2019 USD ($) $ / shares
Business Acquisition [Line Items]
Net sales | $	$ 835,292
Net earnings attributable to EnerSys stockholders | $	$ 58,665
Net earnings per share attributable to EnerSys stockholders - basic | $ / shares	$ 1,360
Net earnings per share attributable to EnerSys stockholders - assuming dilution | $ / shares	$ 1,340

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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