| Cover Page | Dec. 05, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 05, 2024 |
| Entity Registrant Name | EnerSys |
| Entity File Number | 1-32253 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 23-3058564 |
| Entity Address, Address Line One | 2366 Bernville Road |
| Entity Address, City or Town | Reading |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19605 |
| City Area Code | 610 |
| Local Phone Number | 208-1991 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value per share |
| Trading Symbol | ENS |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001289308 |
| Amendment Flag | false |
