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Earnings Per Share - Weighted Average Common Shares Basic and Common Shares Diluted (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Earnings Per Share [Abstract]      
Net earnings attributable to EnerSys stockholders $ 143,911 $ 143,374 $ 137,116
Basic (in shares) 42,106,337 42,548,449 42,411,834
Dilutive effect of:      
Common shares from exercise and lapse of equity awards, net of shares assumed reacquired (in shares) 677,036 675,954 484,941
Diluted weighted-average number of common shares outstanding (in shares) 42,783,373 43,224,403 42,896,775
Basic earnings per common share attributable to EnerSys stockholders (usd per share) $ 3.42 $ 3.37 $ 3.23
Diluted earnings per common share attributable to EnerSys stockholders (usd per share) $ 3.36 $ 3.32 $ 3.20
Anti-dilutive equity awards not included in diluted weighted-average common shares (in shares) 951,057,000 281,483,000 698,546,000