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Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Exit charges Business exit costs Business Exit Costs Treasury stock, value, acquired Purchase of common stock Treasury Stock, Value, Acquired, Cost Method Costs incurred Payments for Restructuring Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation TSRs Market Share Units [Member] Market Share Units [Member] Accounts payable Increase (Decrease) in Accounts Payable Costs incurred Standard and Extended Product Warranty Accrual, Decrease for Payments Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Reclassification from Accumulated Other Comprehensive Income Reclassification out of Accumulated 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on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Summary of Inventories Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic (in dollars per share) Basic earnings per common share attributable to EnerSys stockholders (in dollars per share) Earnings Per Share, Basic Contract with customer, liability, current portion Contract with Customer, Liability, Current Purchase of treasury stock Payments for Repurchase of Common Stock Total current assets Assets, Current Range [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Long-term debt, net of unamortized debt issuance costs Long-term debt, net of unamortized issuance costs Long-Term Debt, Excluding Current Maturities Award Type [Axis] Award Type [Axis] Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, net of allowance for doubtful accounts: July 5, 2026 - $10,522; March 31, 2026 - $8,583 Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable sold to financial institution, proceeds collected Accounts Receivable Sold To Financial Institution, Proceeds Collected Accounts Receivable Sold To Financial Institution, Proceeds Collected Retained earnings Retained Earnings (Accumulated Deficit) Net Sales by segment to unaffiliated customers Revenue From Contract With Customer, Including Assessed Tax, Adjusted Revenue From Contract With Customer, Including Assessed Tax, Adjusted Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Product and Service [Axis] Product and Service [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] 4.375% Senior Notes due 2027 Four Point Three Seven Five Percent Senior Notes Due Two Thousand Twenty Seven [Member] Four Point Three Seven Five Percent Senior Notes Due Two Thousand Twenty Seven Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Employee Severance Employee Severance [Member] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Condensed Financial Statements [Table] 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Prior service costs and deferrals Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Nonredeemable noncontrolling interests Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Other liabilities Increase (Decrease) in Other Operating Liabilities Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Restructuring and other exit charges Restructuring and other exit charges Restructuring Charges Schedule of Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Other expense (income), net Other Nonoperating Income (Expense) Total EnerSys Stockholders’ Equity Parent [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Awards vested in period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Schedule of Defined Benefit Plans Disclosures Schedule of Defined Benefit Plans Disclosures [Table Text Block] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Derivatives not designated in hedging relationships: Derivative, Gain (Loss) on Derivative, Net [Abstract] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Preferred Stock, $0.01 par value, 1,000,000 shares authorized, no shares issued or outstanding at July 5, 2026 and at March 31, 2026 Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Product Warranties Disclosures [Abstract] Product Warranties Disclosures [Abstract] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Foreign currency forward contracts Foreign Exchange Forward [Member] Credit Facility [Axis] Credit Facility [Axis] Restructuring and Other Exit Charges Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Incremental term loan commitment Line of Credit Facility, Incremental Term Loan Commitment Line of Credit Facility, Incremental Term Loan Commitment Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Axis] Non-employee Directors Non-employee Directors [Member] Non-employee Directors [Member] Raw materials Inventory, Raw Materials, Net of Reserves Accounts receivable, sold to financial institution Accounts Receivable Sold To Financial Institution Accounts Receivable Sold To Financial Institution, Quarter To Date Foreign currency impact Restructuring Reserve, Foreign Currency Translation Gain (Loss) Net losses (gains) Gain (Loss) on Derivative Instruments, Net, Pretax Company Selected Measure Amount Company Selected Measure Amount Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] Severance, Non Cash Charges Severance, Non Cash Charges [Member] Severance, Non Cash Charges Shares issued towards equity-based compensation plans, net of equity awards surrendered for option price and taxes (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Net earnings Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets: Assets, Current [Abstract] Provision for doubtful accounts Provision And Recovery For Doubtful Accounts Provision and Recovery For Doubtful Accounts Derivatives Derivative Liability Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Income tax expense Income Tax Expense (Benefit) Mark Matthews [Member] Mark Matthews Accelerated Depreciation, Non Cash Charges Accelerated Depreciation, Non Cash Charges [Member] Accelerated Depreciation, Non Cash Charges Standby Letters of Credit Convertible Notes Payable [Member] Cost of goods sold Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forecast Forecast [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Amortization and deferral Defined Benefit Plan, Amortization of Gain (Loss) Net earnings attributable to EnerSys stockholders Net earnings attributable to EnerSys stockholders Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Unamortized Issuance Costs Unamortized Debt Issuance Expense Location, Statement of Financial Position, Balance [Axis] Location, Statement of Financial Position, Balance [Axis] Proceeds from disposal of property, plant, and equipment Proceeds from Sale of Property, Plant, and Equipment Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Options proceeds, net Proceeds from Stock Options Exercised Motive Power Motive Power Segment [Member] Motive Power Segment Estimated number of positions eliminated (as a percent) Restructuring and Related Cost, Expected Number of Positions Eliminated, Percent Restructuring and Related Cost, Expected Number of Positions Eliminated, Percent Components of Accumulated Other Comprehensive Income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Derivative, term (not extending beyond) Derivative, Contract Term Reassigned Goodwill, Transfers Non-cash interest expense Noncash Interest Expense Accretion And Amortization Of Deferred Finance Fees Noncash interest expense accretion and amortization of deferred finance fees. Derivative Asset, Subject to Master Netting Arrangement, before Offset Derivative Asset, Subject to Master Netting Arrangement, before Offset Accounts receivables, collateralized Accounts Receivable, Collateralized Accounts Receivable, Collateralized Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax Basis of Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]