ENERSYS, 10-K filed on 5/21/2025
Annual Report
v3.25.1
Cover Page - USD ($)
12 Months Ended
Mar. 31, 2025
May 16, 2025
Sep. 29, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Mar. 31, 2025    
Current Fiscal Year End Date --03-31    
Document Transition Report false    
Entity File Number 001-32253    
Entity Registrant Name ENERSYS    
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    
Title of 12(b) Security Common Stock, $0.01 par value per share    
Trading Symbol ENS    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 4,044,296,368
Entity Common Stock, Shares Outstanding (in shares)   39,196,215  
Documents Incorporated by Reference
Portions of the registrant’s definitive Proxy Statement for its Annual Meeting of Stockholders to be held on or about July 31, 2025 are incorporated by reference in Part III of this Annual Report.
   
Amendment Flag false    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001289308    
v3.25.1
Audit Information
12 Months Ended
Mar. 31, 2025
Audit Information [Abstract]  
Auditor Firm ID 42
Auditor Name Ernst & Young LLP
Auditor Location Philadelphia, Pennsylvania
v3.25.1
Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Current assets:    
Cash and cash equivalents $ 343,131 $ 333,324
Accounts receivable, net of allowance for doubtful accounts (2025–$8,675; 2024–$8,107) 597,942 524,725
Inventories, net 739,994 697,698
Prepaid and other current assets 408,747 226,949
Total current assets 2,089,814 1,782,696
Property, plant, and equipment, net 592,433 532,450
Goodwill 721,073 682,934
Other intangible assets, net 375,430 319,407
Deferred taxes 74,793 49,798
Other assets 117,705 98,721
Total assets 3,971,248 3,466,006
Current liabilities:    
Short-term debt 28,502 30,444
Current portion of finance leases 265 237
Accounts payable 405,694 369,456
Accrued expenses 340,607 323,720
Total current liabilities 775,068 723,857
Long-term debt, net of unamortized debt issuance costs 1,083,541 801,965
Finance leases 592 647
Deferred taxes 17,641 30,583
Other liabilities 174,918 151,882
Total liabilities 2,051,760 1,708,934
Commitments and contingencies
Equity:    
Preferred Stock, $0.01 par value, 1,000,000 shares authorized, no shares issued or outstanding at March 31, 2025 and at March 31, 2024 0 0
Common Stock, $0.01 par value per share, 135,000,000 shares authorized, 56,839,590 shares issued and 39,192,061 shares outstanding at March 31, 2025; 56,363,924 shares issued and 40,271,936 shares outstanding at March 31, 2024 568 564
Additional paid-in capital 662,725 629,879
Treasury stock at cost, 17,647,529 shares held as of March 31, 2025 and 16,091,988 shares held as of March 31, 2024 (988,936) (835,827)
Retained earnings 2,489,200 2,163,880
Accumulated other comprehensive loss (247,479) (204,851)
Total EnerSys stockholders’ equity 1,916,078 1,753,645
Nonredeemable noncontrolling interests 3,410 3,427
Total equity 1,919,488 1,757,072
Total liabilities and equity $ 3,971,248 $ 3,466,006
v3.25.1
Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts $ 8,675 $ 8,107
Preferred stock, par value (usd per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (usd per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 135,000,000 135,000,000
Common stock, shares issued (in shares) 56,839,590 56,363,924
Common stock, shares outstanding (in shares) 39,192,061 40,271,936
v3.25.1
Consolidated Statements of Income - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Net sales $ 3,617,579 $ 3,581,871 $ 3,708,579
Inventory adjustment relating to exit activities and step up to fair value relating to recent acquisitions 3,609 20,173 681
Gross profit 1,092,404 982,891 840,138
Operating expenses 608,656 589,599 544,858
Restructuring and other exit charges 14,428 28,103 16,439
Impairment of indefinite-lived intangibles 0 13,619 480
Loss on assets held for sale 4,634 0 0
Operating earnings 464,686 351,570 278,361
Interest expense 51,116 49,954 59,529
Other (income) expense, net 6,993 9,431 8,193
Earnings before income taxes 406,577 292,185 210,639
Income tax expense 42,842 23,089 34,829
Net earnings attributable to EnerSys stockholders $ 363,735 $ 269,096 $ 175,810
Net earnings per common share attributable to EnerSys stockholders:      
Basic (usd per share) $ 9.15 $ 6.62 $ 4.31
Diluted (usd per share) 8.99 6.50 4.25
Dividends per common share (usd per share) $ 0.95 $ 0.85 $ 0.70
Weighted-average number of common shares outstanding:      
Basic (in shares) 39,760,829 40,669,392 40,809,235
Diluted (in shares) 40,438,579 41,371,439 41,326,755
Product      
Net sales $ 3,256,796 $ 3,161,862 $ 3,307,781
Cost of goods sold 2,223,939 2,248,859 2,597,296
Service      
Net sales 360,783 420,009 400,798
Cost of goods sold $ 297,627 $ 329,948 $ 270,464
v3.25.1
Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Statement of Comprehensive Income [Abstract]      
Net earnings $ 363,735 $ 269,096 $ 175,810
Other comprehensive (loss) income:      
Net unrealized gain (loss) on derivative instruments, net of tax (1,024) (656) (1,552)
Pension funded status adjustment, net of tax (576) (5,375) 8,214
Foreign currency translation adjustment (41,045) (15,521) (46,941)
Total other comprehensive (loss) gain, net of tax (42,645) (21,552) (40,279)
Total comprehensive income 321,090 247,544 135,531
Comprehensive gain (loss) attributable to noncontrolling interests (17) (175) (300)
Comprehensive income attributable to EnerSys stockholders $ 321,107 $ 247,719 $ 135,831
v3.25.1
Consolidated Statements of Changes in Equity - USD ($)
$ in Thousands
Total
Total EnerSys Stockholders’ Equity
Preferred Stock
Common Stock
Additional Paid-in Capital
Treasury Stock
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Contra-Equity
Non- redeemable Non- Controlling Interests
Beginning Balance at Mar. 31, 2022 $ 1,493,275 $ 1,489,373 $ 0 $ 557 $ 571,464 $ (719,119) $ 1,783,586 $ (143,495) $ (3,620) $ 3,902
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Stock-based compensation 26,371 26,371     26,371          
Exercise of stock options 4,393 4,393   3 4,390          
Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net (6,453) (6,453)     (6,453)          
Purchase of common stock (22,907) (22,907)       (22,907)        
Contra equity - adjustment to indemnification receivable for acquisition related tax liability 1,157 1,157             1,157  
Other 1,051 1,051     (19) 1,070        
Net earnings 175,810 175,810         175,810      
Dividends (28,537) (28,537)     711   (29,248)      
Other comprehensive income:                    
Pension funded status adjustment, (net of tax (expense) benefit) 8,214 8,214           8,214    
Net unrealized gain (loss) on derivative instruments (net of tax benefit (expense)) (1,552) (1,552)           (1,552)    
Foreign currency translation adjustment (46,941) (46,641)           (46,641)   (300)
Ending Balance at Mar. 31, 2023 1,603,881 1,600,279 0 560 596,464 (740,956) 1,930,148 (183,474) (2,463) 3,602
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Stock-based compensation 30,607 30,607     30,607          
Exercise of stock options 10,786 10,786   4 10,782          
Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net (9,166) (9,166)     (9,166)          
Purchase of common stock (95,690) (95,690)       (95,690)        
Contra equity - adjustment to indemnification receivable for acquisition related tax liability 2,463 2,463             2,463  
Other 1,128 1,128     309 819        
Net earnings 269,096 269,096         269,096      
Dividends (34,481) (34,481)     883   (35,364)      
Other comprehensive income:                    
Pension funded status adjustment, (net of tax (expense) benefit) (5,375) (5,375)           (5,375)    
Net unrealized gain (loss) on derivative instruments (net of tax benefit (expense)) (656) (656)           (656)    
Foreign currency translation adjustment (15,521) (15,346)           (15,346)   (175)
Ending Balance at Mar. 31, 2024 1,757,072 1,753,645 0 564 629,879 (835,827) 2,163,880 (204,851) 0 3,427
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Stock-based compensation 27,825 27,825     27,825          
Exercise of stock options 9,457 9,457   4 9,453          
Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net (7,985) (7,985)     (7,985)          
Purchase of common stock (153,961) (153,961)       (153,961)        
Shares released under deferred compensation for directors 2,404 2,404     2,404          
Other 1,052 1,052     200 852        
Net earnings 363,735 363,735         363,735      
Dividends (37,466) (37,466)     949   (38,415)      
Other comprehensive income:                    
Pension funded status adjustment, (net of tax (expense) benefit) (576) (576)           (576)    
Net unrealized gain (loss) on derivative instruments (net of tax benefit (expense)) (1,024) (1,024)           (1,024)    
Foreign currency translation adjustment (41,045) (41,028)           (41,028)   (17)
Ending Balance at Mar. 31, 2025 $ 1,919,488 $ 1,916,078 $ 0 $ 568 $ 662,725 $ (988,936) $ 2,489,200 $ (247,479) $ 0 $ 3,410
v3.25.1
Consolidated Statements of Changes in Equity (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]      
Dividends per common share $ 0.95 $ 0.85 $ 0.70
Pension funded status adjustment (net of tax (expense) benefit) $ 233 $ 1,787 $ 2,947
Tax expense related to unrealized gain (loss) on derivative instruments $ (311) $ (197) $ (469)
v3.25.1
Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Cash flows from operating activities      
Net earnings $ 363,735 $ 269,096 $ 175,810
Adjustments to reconcile net earnings to net cash provided by operating activities:      
Depreciation and amortization 100,876 92,021 91,153
Write-off of assets relating to restructuring and other exit charges 1,973 24,229 8,920
Impairment of goodwill 880 0 0
Loss on assets held for sale 4,634 13,619 480
Derivatives not designated in hedging relationships:      
Net losses (gains) (3,136) 846 (1,182)
Cash proceeds (settlements) 826 (255) 470
Provision for doubtful accounts 3,239 1,873 (431)
Deferred income taxes (31,925) (29,344) (15,236)
Non-cash interest expense 1,927 2,450 1,964
Stock-based compensation 27,825 30,607 26,371
Gain on disposal of property, plant, and equipment 791 908 (113)
Gain on pension settlement (1,548) 0 0
Changes in assets and liabilities, net of effects of acquisitions:      
Accounts receivable (81,795) 108,631 67,553
Inventories 1,343 75,633 (96,413)
Prepaid and other current assets (220,003) (112,701) 23,689
Other assets (334) 6,027 (6,298)
Accounts payable 36,569 (15,131) (4,236)
Accrued expenses 54,388 (8,254) 5,747
Other liabilities 32 (3,226) 1,690
Net cash provided by (used in) operating activities 260,298 457,029 279,938
Cash flows from investing activities      
Capital expenditures (121,038) (86,437) (88,772)
Purchase of businesses (206,374) (8,270) 0
Proceeds from disposal of property, plant, and equipment 1,870 2,228 586
Investment in Equity Securities (10,852) 0 0
Proceeds from termination of net investment hedges 0 0 43,384
Net cash used in investing activities (336,394) (92,479) (44,802)
Cash flows from financing activities      
Net borrowings (repayments) on short-term debt (259) (231) (21,719)
Proceeds from Second Amended Revolver borrowings 650,000 182,500 310,500
Repayments of Second Amended Revolver borrowings (370,000) (427,500) (500,500)
Proceeds from Amended 2017 Term Loan 0 0 300,000
Proceeds from 2032 Bonds 0 300,000 0
Repayments of 2023 Senior Notes 0 0 (300,000)
Repayments of Second and Third Amended Term Loan 0 293,889 5,215
Debt issuance costs 0 (4,061) (1,121)
Finance lease obligations and other 483 1,169 1,110
Option proceeds, net 9,458 10,786 4,392
Payment of taxes related to net share settlement of equity awards (7,985) (9,166) (6,453)
Purchase of treasury stock (153,961) (95,688) (22,907)
Dividends paid to stockholders (37,466) (34,480) (28,537)
Net cash (used in) provided by financing activities 90,270 (370,560) (270,450)
Effect of exchange rate changes on cash and cash equivalents (4,367) (7,331) (20,509)
Net (decrease) increase in cash and cash equivalents 9,807 (13,341) (55,823)
Cash and cash equivalents at beginning of year 333,324 346,665 402,488
Cash and cash equivalents at end of year $ 343,131 $ 333,324 $ 346,665
v3.25.1
Summary of Significant Accounting Policies
12 Months Ended
Mar. 31, 2025
Accounting Policies [Abstract]  
Summary of Significant Accounting Policies Summary of Significant Accounting Policies
Description of Business

EnerSys (the “Company”) and its predecessor companies have been manufacturers of industrial batteries for over 125 years. EnerSys is a global leader in stored energy solutions for industrial applications. The Company manufactures, markets and distributes industrial batteries and related products such as chargers, outdoor cabinet enclosures, power equipment and battery accessories, and provides related after-market and customer-support services for its products. Additionally, the Company is also a provider of highly integrated power solutions and services to broadband, telecom, renewable and industrial customers.

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries and any partially owned subsidiaries that the Company has the ability to control. Control generally equates to ownership percentage, whereby investments that are more than 50% owned are generally consolidated, investments in affiliates of 50% or less but greater than 20% are generally accounted for using the equity method, and investments in affiliates of 20% or less are accounted at cost minus impairment, if any. All intercompany transactions and balances have been eliminated in consolidation.

Foreign Currency Translation

Results of foreign operations of subsidiaries, whose functional currency is the local currency, are translated into U.S. dollars using average exchange rates during the periods. The assets and liabilities are translated into U.S. dollars using exchange rates as of the balance sheet dates. Gains or losses resulting from translating the foreign currency financial statements are accumulated as a separate component of accumulated other comprehensive income (“AOCI”) in EnerSys’ stockholders’ equity and noncontrolling interests.

Transaction gains and losses resulting from exchange rate changes on transactions denominated in currencies other than the functional currency of the applicable subsidiary are included in the Consolidated Statements of Income, within “Other (income) expense, net”, in the year in which the change occurs.

Revenue Recognition
The Company recognizes revenue when (or as) performance obligations are satisfied by transferring control of the performance obligation to a customer. Control of a performance obligation may transfer to the customer either at a point in time or over time depending on an evaluation of the specific facts and circumstances for each contract, including the terms and conditions of the contract as agreed with the customer, as well as the nature of the products or services to be provided.

The Company's primary performance obligation to its customers is the delivery of finished goods and products, pursuant to
purchase orders. Control of the products sold typically transfers to its customers at the point in time when the goods are shipped
as this is also when title generally passes to its customers under the terms and conditions of the customer arrangements.

Each customer purchase order sets forth the transaction price for the products and services purchased under that arrangement. Some customer arrangements include variable consideration, such as volume rebates, some of which depend upon the customers meeting specified performance criteria, such as a purchasing level over a period of time. The Company uses judgment to estimate the most likely amount of variable consideration at each reporting date. When estimating variable consideration, the Company also applies judgment when considering the probability of whether a reversal of revenue could occur and only recognize revenue subject to this constraint.

Service revenues related to the work performed for the Company’s customers by its maintenance technicians generally represent a separate and distinct performance obligation. Control for these services passes to the customer as the services are performed.

The Company's typical payment terms are 30 days and sales arrangements do not contain any significant financing component for its customers.
The Company uses historic customer product return data as a basis of estimation for customer returns and records the reduction of sales at the time revenue is recognized.

Freight charges billed to customers are included in sales and the related shipping costs are included in cost of sales in the Consolidated Statements of Income. If shipping activities are performed after a customer obtains control of a product, the Company applies a policy election to account for shipping as an activity to fulfill the promise to transfer the product to the customer.

The Company applies a policy election to exclude transaction taxes collected from customers from sales when the tax is both imposed on and concurrent with a specific revenue-producing transaction.

The Company generally provides customers with a product warranty that provides assurance that the products meet standard specifications and are free of defects. The Company maintains a reserve for claims incurred under standard product warranty programs. Performance obligations related to service warranties are not material to the Consolidated Financial Statements.

The Company pays sales commissions to its sales representatives, which may be considered as incremental costs to obtain a contract. However, since the recoverability period is less than one year, the Company has utilized the practical expedient to record these costs of obtaining a contract as an expense as they are incurred.

Warranties

The Company’s products are warranted for a period ranging from one to twenty years for Energy Systems batteries, from one to five years for Motive Power batteries and for a period ranging from one to four years for Specialty transportation batteries. The Company provides for estimated product warranty expenses when the related products are sold. The assessment of the adequacy of the reserve includes a review of open claims and historical experience.

Cash and Cash Equivalents

Cash and cash equivalents include all highly liquid investments with an original maturity of three months or less when purchased.

Concentration of Credit Risk

Financial instruments that subject the Company to potential concentration of credit risk consist principally of short-term cash investments and trade accounts receivable. The Company invests its cash with various financial institutions and in various investment instruments limiting the amount of credit exposure to any one financial institution or entity. The Company has bank deposits that exceed federally insured limits. In addition, certain cash investments may be made in U.S. and foreign government bonds, or other highly rated investments guaranteed by the U.S. or foreign governments. Concentration of credit risk with respect to trade receivables is limited by a large, diversified customer base and its geographic dispersion. The Company performs ongoing credit evaluations of its customers’ financial condition and requires collateral, such as letters of credit, in certain circumstances.

Accounts Receivable

Accounts receivable are recorded net of an allowance for expected credit losses. The Company maintains an allowance for credit losses for the expected failure or inability of its customers to make required payments. The Company recognizes the allowance for expected credit losses at inception and reassesses quarterly based on management’s expectation of the asset’s collectability. The allowance is based on multiple factors including historical experience with bad debts, the credit quality of the customer base, the aging of such receivables and current macroeconomic conditions, as well as management’s expectations of conditions in the future. The Company’s allowance for uncollectible accounts receivable is based on management’s assessment of the collectability of assets pooled together with similar risk characteristics. Accounts are written off when management determines the account is uncollectible. The following table sets forth the changes in the Company's allowance for doubtful
accounts:

Balance at Beginning of PeriodProvision
for Expected Credit Losses
Write-offs, net of Recoveries and OtherBalance at
End of
Period
Fiscal year ended March 31, 2023$12,219 $(431)$(3,013)$8,775 
Fiscal year ended March 31, 20248,775 1,873 (2,541)8,107 
Fiscal year ended March 31, 20258,107 3,239 (2,671)8,675 

Inventories

Inventories are stated at the lower of cost or net realizable value. Cost is determined using the first-in, first-out (FIFO) method. The cost of inventory consists of material, labor, and associated overhead.

Property, Plant, and Equipment

Property, plant, and equipment are recorded at cost and include expenditures that substantially increase the useful lives of the assets. Depreciation is provided using the straight-line method over the estimated useful lives of the assets as follows: 10 to 33 years for buildings and improvements and 3 to 15 years for machinery and equipment.

Maintenance and repairs are expensed as incurred. Interest on capital projects is capitalized during the construction period.

Business Combinations

The Company records an acquisition using the acquisition method of accounting and recognizes the assets acquired and liabilities assumed at their fair values as of the date of the acquisition. The excess of the purchase price over the net tangible and intangible assets is recorded to goodwill. The results of operations of the acquired business are included in the Company’s operating results from the date of acquisition.

Goodwill and Other Intangible Assets

Goodwill and indefinite-lived trademarks are tested for impairment at least annually and whenever events or circumstances occur indicating that a possible impairment may have been incurred. The Company assesses whether goodwill impairment exists using both the qualitative and quantitative assessments. The qualitative assessment involves determining whether events or circumstances exist that indicate it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill. If based on this qualitative assessment the Company determines it is more likely than not that the fair value of a reporting unit is less than its carrying amount, or if the Company elects not to perform a qualitative assessment, a quantitative assessment is performed by determining the fair value of the Company's reporting units.

Goodwill is tested for impairment by determining the fair value of the Company’s reporting units. These estimated fair values are based on financial projections, certain cash flow measures, and market capitalization.

The Company estimates the fair value of its reporting units using a weighting of fair values derived from both the income approach and the market approach. Under the income approach, the Company calculates the fair value of a reporting unit based on the present value of estimated future cash flows. Cash flow projections are based on management's estimates of revenue growth rates and operating margins, taking into consideration industry and market conditions. The discount rate used is based on the weighted-average cost of capital adjusted for the relevant risk associated with business-specific characteristics and the uncertainty related to the business's ability to execute on the projected cash flows. The market approach estimates fair value based on market multiples of revenue and earnings derived from comparable publicly-traded companies with similar operating and investment characteristics as the reporting unit. The weighting of the fair value derived from the market approach ranges from 0% to 50% depending on the level of comparability of these publicly-traded companies to the reporting unit.

In order to assess the reasonableness of the calculated fair values of its reporting units, the Company also compares the sum of the reporting units' fair values to its market capitalization and calculates an implied control premium (the excess of the sum of the reporting units' fair values over the market capitalization). The Company evaluates the control premium by comparing it to control premiums of recent comparable market transactions.
The Company assesses whether indefinite-lived intangible assets impairment exists using both the qualitative and quantitative assessments. The qualitative assessment involves determining whether events or circumstances exist that indicate it is more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount. If based on this qualitative assessment, the Company determines it is more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount or if the Company elects not to perform a qualitative assessment, a quantitative assessment is performed to determine whether an indefinite-lived intangible asset impairment exists. The Company tests the indefinite-lived intangible assets for impairment by comparing the carrying value to the fair value based on current revenue projections of the related operations, under the relief from royalty method. Any excess of the carrying value over the amount of fair value is recognized as an impairment. Any such impairment is recognized in the reporting period in which it has been identified.

Finite-lived assets such as customer relationships, technology, trademarks, licenses, and non-compete agreements are amortized on a straight-line basis over their estimated useful lives, generally over periods ranging from 3 to 20 years. The Company continually evaluates the reasonableness of the useful lives of these assets.

Impairment of Long-Lived Assets

The Company reviews the carrying values of its long-lived assets to be held and used for possible impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable, based on undiscounted estimated cash flows expected to result from its use and eventual disposition. The factors considered by the Company in performing this assessment include current operating results, trends and other economic factors. In assessing the recoverability of the carrying value of a long-lived asset, the Company must make assumptions regarding future cash flows and other factors. If these estimates or the related assumptions change in the future, the Company may be required to record an impairment loss for these assets.

Environmental Expenditures

The Company records a loss and establishes a reserve for environmental remediation liabilities when it is probable that an asset has been impaired or a liability exists and the amount of the liability can be reasonably estimated. Reasonable estimates involve judgments made by management after considering a broad range of information including notifications, demands or settlements that have been received from a regulatory authority or private party, estimates performed by independent engineering companies and outside counsel, available facts, existing and proposed technology, the identification of other potentially responsible parties, their ability to contribute and prior experience. These judgments are reviewed quarterly as more information is received and the amounts reserved are updated as necessary. However, the reserves may materially differ from ultimate actual liabilities if the loss contingency is difficult to estimate or if management’s judgments turn out to be inaccurate. If management believes no best estimate exists, the minimum probable loss is accrued.

Derivative Financial Instruments

The Company utilizes derivative instruments to mitigate volatility related to interest rates, lead prices and foreign currency exposures. The Company does not hold or issue derivative financial instruments for trading or speculative purposes. The Company recognizes derivatives as either assets or liabilities in the accompanying Consolidated Balance Sheets and measures those instruments at fair value. Changes in the fair value of those instruments are reported in AOCI if they qualify for hedge accounting or in earnings if they do not qualify for hedge accounting. Derivatives qualify for hedge accounting if they are designated as hedge instruments and if the hedge is highly effective in achieving offsetting changes in the fair value or cash flows of the asset or liability hedged. For lead and foreign currency forward contracts, effectiveness is measured on a regular basis using statistical analysis and by comparing the overall changes in the expected cash flows of the hedging instrument with the changes in the expected all-in cash outflow required for the underlying lead and foreign currency purchases. This analysis is performed on the initial purchases quarterly that cover the quantities hedged. Accordingly, gains and losses from changes in derivative fair value of effective hedges are deferred and reported in AOCI until the underlying transaction affects earnings. In the case of cross currency fixed interest rate swap agreements, the swaps are remeasured with changes in fair value recognized in foreign currency translation adjustment within AOCI to offset the translation risk from the underlying investments. Balances in the foreign currency translation adjustment accounts remain until the sale or substantially complete liquidation of the foreign entity, upon which they are recognized as a component of income (expense).

The Company has commodity, foreign exchange and interest rate hedging authorization from the Board of Directors and has established a hedging and risk management program that includes the management of market and counterparty risk. Key risk control activities designed to ensure compliance with the risk management program include, but are not limited to, credit review and approval, validation of transactions and market prices, verification of risk and transaction limits, portfolio stress tests,
sensitivity analyses and frequent portfolio reporting, including open positions, determinations of fair value and other risk management metrics.

Market risk is the potential loss the Company and its subsidiaries may incur as a result of price changes associated with a particular financial or commodity instrument. The Company utilizes forward contracts, options, and swaps as part of its risk management strategies, to minimize unanticipated fluctuations in earnings caused by changes in commodity prices, interest rates and / or foreign currency exchange rates. All derivatives are recognized on the balance sheet at their fair value, unless they qualify for the Normal Purchase Normal Sale exemption.

Credit risk is the potential loss the Company may incur due to the counterparty’s non-performance. The Company is exposed to credit risk from interest rate, foreign currency and commodity derivatives with financial institutions. The Company has credit policies to manage their credit risk, including the use of an established credit approval process, monitoring of the counterparty positions and the use of master netting agreements.

The Company has elected to offset net derivative positions under master netting arrangements. The Company does not have any positions involving cash collateral (payables or receivables) under a master netting arrangement as of March 31, 2025 and 2024.

The Company does not have any credit-related contingent features associated with its derivative instruments.

Fair Value of Financial Instruments

The Company groups its recurring, non-recurring and disclosure-only fair value measurements into the following levels when making fair value measurement disclosures:
Level 1Inputs are unadjusted quoted prices in active markets for identical assets or liabilities.
Level 2Inputs are quoted prices for similar assets or liabilities in an active market, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable and market-corroborated inputs which are derived principally from or corroborated by observable market data.
Level 3Inputs are derived from valuation techniques in which one or more significant inputs or value drivers are unobservable.

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price). The Company and its subsidiaries use, as appropriate, a market approach (generally, data from market transactions), an income approach (generally, present value techniques and option-pricing models), and / or a cost approach (generally, replacement cost) to measure the fair value of an asset or liability. These valuation approaches incorporate inputs such as observable, independent market data and / or unobservable data that management believes are predicated on the assumptions market participants would use to price an asset or liability. These inputs may incorporate, as applicable, certain risks such as nonperformance risk, which includes credit risk.

Lead contracts, foreign currency contracts and interest rate contracts generally use an income approach to measure the fair value of these contracts, utilizing readily observable inputs, such as forward interest rates (e.g., Secured Overnight Financing Rate "SOFR"), forward foreign currency exchange rates (e.g., GBP and euro) and commodity prices (e.g., London Metals Exchange), as well as inputs that may not be observable, such as credit valuation adjustments. When observable inputs are used to measure all or most of the value of a contract, the contract is classified as Level 2. Over-the-counter (OTC) contracts are valued using quotes obtained from an exchange, binding and non-binding broker quotes. Furthermore, the Company obtains independent quotes from the market to validate the forward price curves. OTC contracts include forwards, swaps and options. To the extent possible, fair value measurements utilize various inputs that include quoted prices for similar contracts or market-corroborated inputs.

When unobservable inputs are significant to the fair value measurement, the asset or liability is classified as Level 3. Additionally, Level 2 fair value measurements include adjustments for credit risk based on the Company’s own creditworthiness (for net liabilities) and its counterparties’ creditworthiness (for net assets). The Company assumes that observable market prices include sufficient adjustments for liquidity and modeling risks. The Company did not have any fair value measurements that transferred between Level 2 and Level 3 as well as Level 1 and Level 2.
Income Taxes

The Company accounts for income taxes using the asset and liability approach, which requires deferred tax assets and liabilities be recognized using enacted tax rates to measure the effect of temporary differences between book and tax bases on recorded assets and liabilities. Valuation allowances are recorded to reduce deferred tax assets, if it is more likely than not some portion or all of the deferred tax assets will not be realized. The need to establish valuation allowances against deferred tax assets is assessed quarterly. The primary factors used to assess the likelihood of realization are expected reversals of taxable temporary timing differences, forecasts of future taxable income and available tax planning strategies that could be implemented to realize the net deferred tax assets.

The Company recognizes tax related interest and penalties in income tax expense in its Consolidated Statement of Income.

With respect to accounting for uncertainty in income taxes, the Company evaluates tax positions to determine whether the benefits of tax positions are more likely than not of being sustained upon audit based on the technical merits of the tax position. For tax positions that are more likely than not of being sustained upon audit, the Company recognizes the largest amount of the benefit that is greater than 50% likely of being realized upon ultimate settlement. For tax positions that are not more likely than not of being sustained upon audit, the Company does not recognize any portion of the benefit. If the more likely than not threshold is not met in the period for which a tax position is taken, the Company may subsequently recognize the benefit of that tax position if the tax matter is effectively settled, the statute of limitations expires, or if the more likely than not threshold is met in a subsequent period.

No additional income taxes have been provided for any undistributed foreign earnings or any additional outside basis difference inherent in these entities, as these amounts continue to be indefinitely reinvested in foreign operations.

Regarding the GILTI tax rules, the Company is allowed to make an accounting policy choice of either (1) treating the taxes due on future US inclusions in taxable income as a current-period expense when incurred (“period cost method”) or (2) factoring amounts into a Company’s measurement of its deferred taxes (“deferred method”). The Company has elected the period cost method.

Production Credits Under the Inflation Reduction Act

On August 16, 2022, the Inflation Reduction Act of 2022 (“IRA”) was enacted, and on December 14, 2023, the United States Treasury issued proposed regulations, which provided further guidance related to the Section 45X Advanced Manufacturing Production Credit (AMPC). The IRA includes multiple incentives to promote clean energy, and energy storage manufacturing among other provisions with tax credits available from 2023 to 2032, subject to phase out beginning in 2030. In particular, the IRA creates a refundable tax credit, pursuant to Section 45X of the Internal Revenue Code (“IRC”), for battery cells and battery modules manufactured or assembled in the United States and sold to third parties as well a credit for electrode active material for batteries.

Refundable tax credits are accounted for by analogy to government grants, as the taxpayer can realize the benefit regardless of whether or not they have an income tax liability. Therefore, these amounts are not considered income taxes and fall outside the scope of Topic 740.

The Company accounts for government assistance that is not subject to the scope of ASC 740 using a grant accounting model, by analogy to International Accounting Standards 20, Accounting for Government Grants and Disclosure of Government Assistance, and recognizes such grants when the Company has reasonable assurance that it will comply with the grant’s conditions and that the grant will be received. The Company recognizes these credits as a reduction in cost of sales within the Consolidated Statement of Income as revenue and costs are recognized on the qualifying finished goods. The AMPCs are also reflected in the Consolidated Balance Sheet as a reduction of income tax payable within accrued expenses and other liabilities. Any credit generated in excess of those liabilities would be recorded as a refund of taxes and reflected in other current assets.
In fiscal 2025, 2024, and 2023, the AMPC impact resulted in a reduction of our costs of goods sold and income tax payable of $184,592, $136,360, and $17,283, respectively.

In December 2024, the United States Treasury issued final regulations on section 45X of the Internal Revenue Code (IRC). The issuance of the final regulations and the resulting changes in our evaluation of qualifying products and resulted in a $25,037 change in our estimate to the beginning of the effective date of the IRA, January 1, 2023, through the end of Fiscal 2024.
Deferred Financing

Debt issuance costs that are incurred by the Company in connection with the issuance of debt are deferred and amortized to interest expense over the life of the underlying indebtedness, adjusted to reflect any early repayments and are shown as a deduction from long-term debt.

Stock-Based Compensation Plans

The Company measures the cost of employee services received in exchange for the award of an equity instrument based on the grant-date fair value of the award, with such cost recognized over the applicable vesting period.

Market condition-based awards

The Company grants market condition-based awards and performance condition-based awards.

Beginning in fiscal 2017 and until fiscal 2020, the Company granted market condition-based awards (“TSR”). A participant may earn between 0% to 200% of the number of awards granted, based on the total shareholder return of the Company's common stock over a three-year period, relative to the shareholder return of a defined peer group. The awards cliff vest on the third anniversary of the date of grant and are settled in common stock on the first anniversary of the vesting date. The TSR is calculated by dividing the sixty or ninety calendar day average price at end of the period (as applicable) and the reinvested dividends thereon by such sixty or ninety calendar day average price at start of the period. The maximum number of awards earned is capped at 200% of the target award. Additionally, no payout will be awarded in the event that the TSR at the vesting date reflects less than a 25% return from the average price at the grant date. These share units are similar to the share units granted prior to fiscal 2016, except that under these awards, the targets are more difficult to achieve as they are tied to the TSR of a defined peer group. The fair value of these awards is estimated at the date of grant, using a Monte Carlo Simulation.
The Company recognizes compensation expense using the straight-line method over the life of the market condition-based awards except for those issued to certain retirement-eligible participants, which are expensed on an accelerated basis.

Restricted Stock Units
The fair value of restricted stock units is based on the closing market price of the Company’s common stock on the date of grant. These awards generally vest, and are settled in common stock, at 25% per year, over a four-year period from the date of grant. The Company recognizes compensation expense using the straight-line method over the life of the restricted stock units.

Stock Options

The fair value of the options granted is estimated at the date of grant using the Black-Scholes option-pricing model utilizing assumptions based on historical data and current market data. The assumptions include expected term of the options, risk-free interest rate, expected volatility, and dividend yield. The expected term represents the expected amount of time that options granted are expected to be outstanding, based on historical and forecasted exercise behavior. The risk-free rate is based on the rate at the grant date of zero-coupon U.S. Treasury Notes with a term equal to the expected term of the option. Expected volatility is estimated using historical volatility rates based on historical weekly price changes over a term equal to the expected term of the options. The Company’s dividend yield is based on historical data. The Company recognizes compensation expense using the straight-line method over the vesting period of the options except for those issued to certain retirement-eligible participants, which are expensed on an accelerated basis.

Forfeitures

Forfeitures of share-based awards are estimated at the time of grant and revised, if necessary, in subsequent periods if actual
forfeitures differ from those estimates.

Earnings Per Share

Basic earnings per common share (“EPS”) are computed by dividing net earnings attributable to EnerSys stockholders by the weighted-average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that would occur if securities or other contracts to issue common stock were exercised or converted into common stock utilizing the treasury stock method. At March 31, 2025, 2024 and 2023, the Company had outstanding stock options, restricted stock units, market condition and performance condition-based awards, which could potentially dilute basic earnings per share in the future.
Segment Reporting

The Company's chief operating decision maker, or CODM (the Company's Chief Executive Officer), reviews financial information for purposes of assessing business performance and allocating resources, by focusing on the lines of business on a global basis. The Company excludes certain items that are not included in the segment performance as these are managed and viewed on a consolidated basis. The Company identifies the following as its four operating segments, based on lines of business:
Energy Systems - uninterruptible power systems, or “UPS” applications for computer and computer-controlled systems, as well as telecommunications systems, switchgear and electrical control systems used in industrial facilities and electric utilities, large-scale energy storage and energy pipelines. Energy Systems also includes highly integrated power solutions and services to broadband, telecom, data center, and industrial customers, as well as thermally managed cabinets and enclosures for electronic equipment and batteries.
Motive Power - power for electric industrial forklifts, AGVs other material handling equipment used in manufacturing, and warehousing operations, as well as equipment used in floor care, mining, rail and airport ground support applications.
Specialty - premium starting, lighting and ignition applications in transportation, energy solutions for satellites, spacecraft, commercial aircraft, military, aircraft, submarines, ships, other tactical vehicles, defense applications and portable power solutions for soldiers in the field, as well as medical devices and equipment.
New Ventures - energy storage and management systems for demand charge reduction, utility back-up power, and dynamic fast charging for electric vehicles.

The operating segments of Energy Systems, Motive Power, and Specialty also represent the Company's reportable segments under ASC 280, Segment Reporting.

Recently Adopted Accounting Standards

In November 2023, the Financial Accounting Standards Board issued new guidance that requires incremental disclosures related to reportable segments. That standard requires disclosure, on an annual and interim basis, of significant segment expenses that are regularly provided to the chief operating decision maker ("CODM") and included within each reported measure of profit or loss. The title and position of the CODM and how the reported measure of segment profit or loss is used by the CODM to assess segment performance and allocate resources is also required to be disclosed. The standard also permits disclosure of additional measures of segment profit. The Company adopted the new guidance for the year ended March 31, 2025.

Recently Issued Accounting Standards not yet adopted

In December 2023, the Financial Accounting Standards Board issued a final standard on improvements to income tax disclosures. The standard requires disclosure of specific categories within the effective tax rate reconciliation and details about significant reconciling items, subject to a quantitative threshold. The standard also requires information on income taxes paid disaggregated by federal, state and foreign based on a quantitative threshold. The standard is effective for fiscal years beginning after December 15, 2024. Early adoption is permitted. The standard is applied prospectively with an option for retrospective adoption. The Company is currently evaluating the impact of adopting this standard on its disclosures.

In November 2024, the Financial Accounting Standards Board issued a final standard on disaggregation of income statement expenses. The standard requires disclosure of more detailed information about certain costs and expenses in the notes to the financial statements. The standard is effective for fiscal years beginning after December 15, 2026 and for interim periods beginning after December 15, 2027. Early adoption is permitted. The standard is applied prospectively with an option for retrospective adoption. The Company is currently evaluating the impact of adopting this standard on its disclosures.


Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. These estimates and assumptions take into account historical and forward looking factors that the
Company believes are reasonable, and the Company’s estimates and assumptions may evolve as conditions change. Actual results could differ from those estimates.

Examples of significant estimates include the allowance for credit losses, the recoverability of property, plant and equipment, the incremental borrowing rate for lease liabilities, the recoverability of intangible assets and other long-lived assets, fair value measurements, including those related to financial instruments, fair value of goodwill and intangible assets, valuation allowances on tax assets, production tax credits under the Inflation Reduction Act, pension and postretirement benefit obligations, contingencies and the identification and valuation of assets acquired and liabilities assumed in connection with business combinations.
v3.25.1
Revenue Recognition
12 Months Ended
Mar. 31, 2025
Revenue from Contract with Customer [Abstract]  
Revenue Recognition Revenue Recognition
The Company's revenues by reportable segments are presented in Note 24.

Service revenues related to the work performed for the Company’s customers by its maintenance technicians generally represent a separate and distinct performance obligation. Control for these services passes to the customer as the services are performed.

A small portion of the Company's customer arrangements oblige the Company to create customized products for its customers that require the bundling of both products and services into a single performance obligation because the individual products and services that are required to fulfill the customer requirements do not meet the definition for a distinct performance obligation. These customized products generally have no alternative use to the Company and the terms and conditions of these arrangements give the Company the enforceable right to payment for performance completed to date, including a reasonable profit margin. For these arrangements, control transfers over time and the Company measures progress towards completion by selecting the input or output method that best depicts the transfer of control of the underlying goods and services to the customer for each respective arrangement. Methods used by the Company to measure progress toward completion include labor hours, costs incurred and units of production. Revenues recognized over time for fiscal 2025, 2024 and 2023 amounted to $188,270, $251,820 and $244,013, respectively.

On March 31, 2025, the aggregate transaction price allocated to unsatisfied (or partially unsatisfied) performance obligations was approximately $173,979, of which, the Company estimates that approximately $109,125 will be recognized as revenue in fiscal 2026, $46,812 in fiscal 2027, and $18,042 in fiscal 2028.

Any payments that are received from a customer in advance, prior to the satisfaction of a related performance obligation and billings in excess of revenue recognized, are deferred and treated as a contract liability. Advance payments and billings in excess of revenue recognized are classified as current or non-current based on the timing of when recognition of revenue is expected. As of March 31, 2025, the current and non-current portion of contract liabilities were $28,820 and $488, respectively. As of March 31, 2024, the current and non-current portion of contract liabilities were $27,649 and $960, respectively. Revenues recognized during fiscal 2025 and fiscal 2024, that were included in the contract liability at the beginning of the year, amounted to $11,967 and $20,166, respectively.

Amounts representing work completed and not billed to customers represent contract assets and were $71,774 and $55,363 as of March 31, 2025 and March 31, 2024, respectively.

The Company uses historic customer product return data as a basis of estimation for customer returns and records the reduction of sales at the time revenue is recognized. At March 31, 2025, the right of return asset related to the value of inventory anticipated to be returned from customers was $4,300 and refund liability representing amounts estimated to be refunded to customers was $7,108.
v3.25.1
Leases
12 Months Ended
Mar. 31, 2025
Leases [Abstract]  
Leases Leases
The Company leases manufacturing facilities, distribution centers, office space, vehicles and other equipment under non-cancellable leases with initial terms typically ranging from 1 to 16 years. At contract inception, the Company reviews the terms of the arrangement to determine if the contract is or contains a lease. Guidance in Topic 842 is used to evaluate whether the contract has an identified asset; if the Company has the right to obtain substantially all economic benefits from the asset; and if it has the right to direct the use of the underlying asset. When determining if a contract has an identified asset, the Company considers both explicit and implicit assets, and whether the supplier has the right to substitute the asset. When determining if the Company has the right to obtain substantially all economic benefits from the asset, the Company considers the primary outputs
of the identified asset throughout the period of use and determines if it receives greater than 90% of those benefits. When determining if it has the right to direct the use of an underlying asset, the Company considers if it has the right to direct how and for what purpose the asset is used throughout the period of use and if it controls the decision-making rights over the asset.

Lease terms may include options to extend or terminate the lease. The Company exercises its judgment to determine the term of those leases when extension or termination options are present and include such options in the calculation of the lease term when it is reasonably certain that the Company will exercise those options.

The Company has elected to include both lease and non-lease components in the determination of lease payments for all asset classes. Payments made to a lessor for items such as taxes, insurance, common area maintenance, or other costs commonly referred to as executory costs, are also included in lease payments if they are fixed. The fixed portion of these payments are included in the calculation of the lease liability, while any variable portion would be recognized as variable lease expenses, when incurred. Variable payments made to third parties for these, or similar costs, such as utilities, are not included in the calculation of lease payments.

Both finance and operating leases are reflected as liabilities on the commencement date of the lease based on the present value of the lease payments to be made over the lease term. As most of the leases do not provide an implicit rate, the Company has exercised judgment in electing the incremental borrowing rate based on the information available when the lease commences to determine the present value of future payments. Right-of-use assets are valued at the initial measurement of the lease liability, plus any initial direct costs or rent prepayments and reduced by any lease incentives and any deferred lease payments.

Operating lease expense is recognized on a straight-line basis over the lease term. Finance lease expense includes depreciation, which is recognized on a straight-line basis over the expected life of the leased asset, and interest expense, which is recognized following an effective interest rate method.

Short term leases with an initial term of 12 months or less are not presented on the balance sheet and expense is recognized as incurred. The current and non-current portion of operating lease liabilities are reflected in accrued expenses and other liabilities, respectively, on the consolidated balance sheets. The right-of use assets relating to operating and finance leases are reflected in other assets and property, plant and equipment, respectively, on the consolidated balance sheets.

The following table presents lease assets and liabilities and their balance sheet classification:
Classification
As of
March 31, 2025
As of
March 31, 2024
Operating Leases:
Right-of-use assetsOther assets$83,635 $76,413 
Operating lease current liabilitiesAccrued expenses22,357 19,280 
Operating lease non-current liabilitiesOther liabilities67,033 61,687 
Finance Leases:
Right-of-use assetsProperty, plant, and equipment, net$915 $878 
Finance lease current liabilitiesCurrent portion of finance leases265 237 
Finance lease non-current liabilitiesFinance leases592 647 
The components of lease expense for the fiscal years ended March 31, 2025 and March 31, 2024 were as follows:
ClassificationMarch 31, 2025March 31, 2024
Operating Leases:
Operating lease costOperating expenses$27,040 $28,030 
Variable lease costOperating expenses6,338 11,669 
Short term lease costOperating expenses16,573 8,078 
Finance Leases:
DepreciationOperating expenses$282 $297 
Interest expenseInterest expense66 57 
Total$50,299 $48,131 
The following table presents the weighted average lease term and discount rates for leases as of March 31, 2025 and March 31, 2024:
March 31, 2025
March 31, 2024
Operating Leases:
Weighted average remaining lease term (years)5.1 years5.5 years
Weighted average discount rate6.06%5.38%
Finance Leases:
Weighted average remaining lease term (years)3.2 years3.8 years
Weighted average discount rate7.07%7.4%



The following table presents future payments due under leases reconciled to lease liabilities as of March 31, 2025:
Finance LeasesOperating Leases
Year ended March 31,
2026$362 $27,147 
2027343 24,158 
2028303 20,674 
2029123 14,121 
203010 8,243 
Thereafter— 10,622 
Total undiscounted lease payments1,141 104,965 
Present value discount115 15,577 
Lease liability$1,026 $89,388 

The following table presents supplemental disclosures of cash flow information related to leases for the fiscal years ended March 31, 2025 and March 31, 2024:
March 31, 2025March 31, 2024
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases$64 $57 
Operating cash flows from operating leases26,022 27,406 
Financing cash flows from finance leases268 275 
Supplemental non-cash information on lease liabilities arising from right-of-use assets:
Right-of-use assets obtained in exchange for new finance lease liabilities$302 $811 
Right-of-use assets obtained in exchange for new operating lease liabilities28,184 31,284 
Leases Leases
The Company leases manufacturing facilities, distribution centers, office space, vehicles and other equipment under non-cancellable leases with initial terms typically ranging from 1 to 16 years. At contract inception, the Company reviews the terms of the arrangement to determine if the contract is or contains a lease. Guidance in Topic 842 is used to evaluate whether the contract has an identified asset; if the Company has the right to obtain substantially all economic benefits from the asset; and if it has the right to direct the use of the underlying asset. When determining if a contract has an identified asset, the Company considers both explicit and implicit assets, and whether the supplier has the right to substitute the asset. When determining if the Company has the right to obtain substantially all economic benefits from the asset, the Company considers the primary outputs
of the identified asset throughout the period of use and determines if it receives greater than 90% of those benefits. When determining if it has the right to direct the use of an underlying asset, the Company considers if it has the right to direct how and for what purpose the asset is used throughout the period of use and if it controls the decision-making rights over the asset.

Lease terms may include options to extend or terminate the lease. The Company exercises its judgment to determine the term of those leases when extension or termination options are present and include such options in the calculation of the lease term when it is reasonably certain that the Company will exercise those options.

The Company has elected to include both lease and non-lease components in the determination of lease payments for all asset classes. Payments made to a lessor for items such as taxes, insurance, common area maintenance, or other costs commonly referred to as executory costs, are also included in lease payments if they are fixed. The fixed portion of these payments are included in the calculation of the lease liability, while any variable portion would be recognized as variable lease expenses, when incurred. Variable payments made to third parties for these, or similar costs, such as utilities, are not included in the calculation of lease payments.

Both finance and operating leases are reflected as liabilities on the commencement date of the lease based on the present value of the lease payments to be made over the lease term. As most of the leases do not provide an implicit rate, the Company has exercised judgment in electing the incremental borrowing rate based on the information available when the lease commences to determine the present value of future payments. Right-of-use assets are valued at the initial measurement of the lease liability, plus any initial direct costs or rent prepayments and reduced by any lease incentives and any deferred lease payments.

Operating lease expense is recognized on a straight-line basis over the lease term. Finance lease expense includes depreciation, which is recognized on a straight-line basis over the expected life of the leased asset, and interest expense, which is recognized following an effective interest rate method.

Short term leases with an initial term of 12 months or less are not presented on the balance sheet and expense is recognized as incurred. The current and non-current portion of operating lease liabilities are reflected in accrued expenses and other liabilities, respectively, on the consolidated balance sheets. The right-of use assets relating to operating and finance leases are reflected in other assets and property, plant and equipment, respectively, on the consolidated balance sheets.

The following table presents lease assets and liabilities and their balance sheet classification:
Classification
As of
March 31, 2025
As of
March 31, 2024
Operating Leases:
Right-of-use assetsOther assets$83,635 $76,413 
Operating lease current liabilitiesAccrued expenses22,357 19,280 
Operating lease non-current liabilitiesOther liabilities67,033 61,687 
Finance Leases:
Right-of-use assetsProperty, plant, and equipment, net$915 $878 
Finance lease current liabilitiesCurrent portion of finance leases265 237 
Finance lease non-current liabilitiesFinance leases592 647 
The components of lease expense for the fiscal years ended March 31, 2025 and March 31, 2024 were as follows:
ClassificationMarch 31, 2025March 31, 2024
Operating Leases:
Operating lease costOperating expenses$27,040 $28,030 
Variable lease costOperating expenses6,338 11,669 
Short term lease costOperating expenses16,573 8,078 
Finance Leases:
DepreciationOperating expenses$282 $297 
Interest expenseInterest expense66 57 
Total$50,299 $48,131 
The following table presents the weighted average lease term and discount rates for leases as of March 31, 2025 and March 31, 2024:
March 31, 2025
March 31, 2024
Operating Leases:
Weighted average remaining lease term (years)5.1 years5.5 years
Weighted average discount rate6.06%5.38%
Finance Leases:
Weighted average remaining lease term (years)3.2 years3.8 years
Weighted average discount rate7.07%7.4%



The following table presents future payments due under leases reconciled to lease liabilities as of March 31, 2025:
Finance LeasesOperating Leases
Year ended March 31,
2026$362 $27,147 
2027343 24,158 
2028303 20,674 
2029123 14,121 
203010 8,243 
Thereafter— 10,622 
Total undiscounted lease payments1,141 104,965 
Present value discount115 15,577 
Lease liability$1,026 $89,388 

The following table presents supplemental disclosures of cash flow information related to leases for the fiscal years ended March 31, 2025 and March 31, 2024:
March 31, 2025March 31, 2024
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases$64 $57 
Operating cash flows from operating leases26,022 27,406 
Financing cash flows from finance leases268 275 
Supplemental non-cash information on lease liabilities arising from right-of-use assets:
Right-of-use assets obtained in exchange for new finance lease liabilities$302 $811 
Right-of-use assets obtained in exchange for new operating lease liabilities28,184 31,284 
v3.25.1
Acquisition
12 Months Ended
Mar. 31, 2025
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]  
Acquisition Acquisition
Bren-Tronics

On July 26, 2024, the Company completed the acquisition of all of the equity of Bren-Tronics Defense LLC for the aggregate purchase price consideration of $206,374 net of cash and restricted cash acquired subject to final purchase price adjustments as set forth in the stock purchase agreement. Bren-Tronics Defense LLC, headquartered in Commack, New York, is a leading manufacturer of highly reliable portable power solutions, including small and large format lithium batteries and charging solutions, for military and defense applications. The transaction was accounted for as a business combination by applying the acquisition method of accounting.
The following table summarizes the provisional fair values of the assets acquired and liabilities assumed at the date of the acquisition:

Trade Receivables $10,325 
Inventory 48,362 
Prepaid and other current assets1,392 
Property, plant and equipment14,701 
Other intangible assets 90,500 
Deferred Taxes1,069 
Other assets2,003 
Total assets acquired$168,352 
Accounts payable2,485 
Accrued liabilities8,078 
Other liabilities2,236 
Total liabilities assumed$12,799 
Net assets acquired$155,553 
Consideration transferred:
Cash consideration, net of cash and restricted cash acquired$206,374 
Total consideration transferred206,374 
Less: Fair value of acquired identifiable assets and liabilities155,553 
Goodwill$50,821 

The amounts above represent the Company's provisional fair value estimates related to the acquisition as of July 26, 2024 and are subject to subsequent adjustments as additional information is obtained during the applicable measurement period. The primary areas of estimates that are not yet finalized include items that may arise from income tax returns or contingencies. The purchase price was allocated to the tangible assets and identifiable intangible assets acquired and liabilities assumed based on their acquisition date estimated fair values. The fair value of trade receivables acquired is $10,325, with gross contractual amounts being $10,325. The Company currently expects all to be collectible. The identifiable intangible assets consist of trademarks, customer relationships, and developed technology which were assigned fair values of $4,200, $63,100 and $23,200, respectively. The trade names and trademarks, customer relationships and developed technology are being amortized on a straight-line basis over weighted average useful lives of 6, 13 and 12 years, respectively.

Goodwill represents the excess of the purchase price over the net identifiable tangible and intangible assets acquired. The Company believes the goodwill related to the acquisition was attributable to the value of the assembled workforce as well as the collective experience of the management team with regards to its operations, customers, and industry. All acquired goodwill is deductible for tax purposes.

The results of the Bren-Tronics acquisition have been included in the Company’s results of operations in the Specialty operating segment from the date of acquisition. Pro forma earnings and earnings per share computations have not been presented as this acquisition is not considered material.
v3.25.1
Accounts Receivable
12 Months Ended
Mar. 31, 2025
Receivables [Abstract]  
Accounts Receivable Accounts Receivable
March 31,
20252024
Accounts receivable$606,617 $532,832 
Allowance for doubtful accounts 8,675 8,107 
Accounts receivable, net$597,942 $524,725 
During fiscal 2023, the Company entered into a Receivables Purchase Agreement (RPA), under which the Company continuously sells its interest in designated pools of trade accounts receivables, at a discount, to a special purpose entity, which in turn sells certain of the receivables to an unaffiliated financial institution ("unaffiliated financial institution") on a monthly basis. The Company may sell certain US-originated accounts receivable balances up to a maximum amount of $150,000. In return for these sales, the Company receives a cash payment equal to the face value of the receivables and is charged a fee of Secured Overnight Financing Rate (“SOFR”) plus 85 basis points against the sold receivable balance. The program is conducted through EnerSys Finance LLC ("EnerSys Finance"), an entity structured to be bankruptcy remote, and matures in December 2025. The Company is deemed the primary beneficiary of EnerSys Finance as the Company has both the power to direct the activities that most significantly impact the entity’s economic performance and the obligation to absorb losses or the right to receive the benefits that could potentially be significant to the entity from the transfer of the trade accounts receivables into the special purpose entity. Accordingly, EnerSys Finance is included in the Company’s Consolidated Financial Statements.

Receivables sold to unaffiliated financial institutions under the program are excluded from “Accounts receivable, net” on the Company’s Consolidated Balance Sheets, and cash receipts are reflected as cash provided by operating activities on the Consolidated Statements of Cash Flows. The purchase price is received in cash when the receivables are sold, and fees charged relating to this balance are recorded to other (income) expense. Certain unsold receivables held by EnerSys Finance serve as collateral to unaffiliated financial institutions. These unsold receivables are included in “Accounts receivable, net” in the Company’s Consolidated Balance Sheets. The Company continues servicing the receivables which were sold and in exchange receives a servicing fee from EnerSys Finance under the program.

During fiscal 2025, the Company sold $775,236 of accounts receivables for approximately $775,236 in net proceeds to an unaffiliated financial institution, of which $775,236 were collected as of March 31, 2025. Total collateralized accounts receivables of approximately $388,030, were held by EnerSys Finance at March 31, 2025.

During fiscal 2024, the Company sold $710,746 of accounts receivables for approximately $710,746 in net proceeds to an unaffiliated financial institution, of which $710,746 were collected as of March 31, 2024. Total collateralized accounts receivables of approximately $341,223, were held by EnerSys Finance at March 31, 2024.
Any accounts receivables held by EnerSys Finance would likely not be available to other creditors of the Company in the event of bankruptcy or insolvency proceedings relating to the Company until the outstanding balances under the RPA are satisfied. Additionally, the financial obligations of EnerSys Finance to the unaffiliated financial institutions under the program are limited to the assets it owns and there is no recourse to the Company for receivables that are uncollectible as a result of the insolvency of EnerSys Finance or its inability to pay the account debtors.
v3.25.1
Inventories
12 Months Ended
Mar. 31, 2025
Inventory Disclosure [Abstract]  
Inventories Inventories
 March 31,
 20252024
Raw materials$296,365 $284,773 
Work-in-process125,459 115,191 
Finished goods318,170 297,734 
Total$739,994 $697,698 
v3.25.1
Property, Plant, and Equipment
12 Months Ended
Mar. 31, 2025
Property, Plant and Equipment [Abstract]  
Property, Plant, and Equipment Property, Plant, and Equipment
Property, plant, and equipment consist of:
 March 31,
 20252024
Land, buildings, and improvements$322,058 $313,258 
Machinery and equipment994,003 930,858 
Construction in progress115,500 91,829 
1,431,561 1,335,945 
Less accumulated depreciation(839,128)(803,495)
Total$592,433 $532,450 

Depreciation expense for the fiscal years ended March 31, 2025, 2024, and 2023 totaled $69,071, $64,028, and $60,405, respectively. Interest capitalized in connection with major capital expenditures amounted to $4,544, $1,268, and $857 for the fiscal years ended March 31, 2025, 2024 and 2023, respectively.
v3.25.1
Goodwill and Other Intangible Assets
12 Months Ended
Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets
Other Intangible Assets
Information regarding the Company’s other intangible assets are as follows:
 March 31,
 20252024
 Gross
Amount
Accumulated
Amortization
Net
Amount
Gross
Amount
Accumulated
Amortization
Net
Amount
Indefinite-lived intangible assets:
Trademarks$129,210 $(953)$128,257 $131,167 $(953)$130,214 
Finite-lived intangible assets:
Customer relationships356,800 (168,932)187,868 295,215 (147,833)147,382 
Non-compete2,825 (2,825)— 2,825 (2,825)— 
Technology119,645 (65,160)54,485 96,708 (55,969)40,739 
Trademarks14,815 (9,995)4,820 9,554 (8,482)1,072 
Licenses1,196 (1,196)— 1,196 (1,196)— 
Total$624,491 $(249,061)$375,430 $536,665 $(217,258)$319,407 

The Company’s amortization expense related to finite-lived intangible assets was $31,805, $27,993, and $30,748, for the years ended March 31, 2025, 2024 and 2023, respectively. The expected amortization expense based on the finite-lived intangible assets as of March 31, 2025, is $33,371 in fiscal 2026, $32,668 in fiscal 2027, $32,176 in fiscal 2028, $30,308 in fiscal 2029 and $25,202 in fiscal 2030.
Goodwill

The following table presents the changes in the carrying amount of goodwill by segment during fiscal 2024 and 2025:

 Energy SystemsMotive PowerSpecialtyTotal
Balance at March 31, 2023$258,204 $321,530 $96,981 $676,715 
Acquisitions— 4,390 — 4,390 
Foreign currency translation adjustment807 798 224 1,829 
Balance at March 31, 2024$259,011 $326,718 $97,205 $682,934 
Acquisitions— — 50,821 50,821 
Foreign currency translation adjustment(13,264)328 254 (12,682)
Balance at March 31, 2025$245,747 $327,046 $148,280 $721,073 


Impairment of goodwill, finite and indefinite-lived intangibles

Goodwill is tested annually for impairment during the fourth quarter or earlier upon the occurrence of certain events or substantive changes in circumstances that indicate goodwill is more likely than not impaired. The Company did not record any impairment relating to its goodwill during fiscal 2024, 2023, and 2022.

During fiscal year 2025, there were no non-cash charges related to impairment of indefinite-lived trademarks under the caption “Impairment of indefinite-lived intangibles” in the Consolidated Statements of Income. During the fiscal year 2024, the Company recorded non-cash charges of $13,619, related to impairment of indefinite-lived trademarks under the caption “Impairment of indefinite-lived intangibles” in the Consolidated Statements of Income. Management completed its evaluation of key inputs used to estimate the fair value of its indefinite-lived trademarks and determined that an impairment charge was appropriate.
The Company estimated tax-deductible goodwill to be approximately $122,904 and $78,147 as of March 31, 2025 and 2024, respectively.
v3.25.1
Prepaid and Other Current Assets
12 Months Ended
Mar. 31, 2025
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Prepaid and Other Current Assets Prepaid and Other Current Assets
Prepaid and other current assets consist of the following:
 March 31,
 20252024
Prepaid income taxes$246,816 $94,866 
Contract assets71,774 55,363 
Prepaid non-income taxes21,357 19,509 
Non-trade receivables6,674 4,124 
Other62,126 53,087 
Total$408,747 $226,949 
v3.25.1
Accrued Expenses
12 Months Ended
Mar. 31, 2025
Payables and Accruals [Abstract]  
Accrued Expenses Accrued Expenses
Accrued expenses consist of the following:
 March 31,
 20252024
Payroll and benefits$90,956 $84,734 
Accrued selling expenses48,098 46,738 
Contract liabilities28,821 27,649 
Warranty28,090 26,304 
Operating lease liabilities22,357 19,280 
Income taxes payable22,110 16,716 
Freight19,908 16,549 
VAT and other non-income taxes14,649 17,595 
Interest9,025 9,201 
Other56,593 58,954 
Total$340,607 $323,720 
v3.25.1
Debt
12 Months Ended
Mar. 31, 2025
Debt Disclosure [Abstract]  
Debt Debt
The following summarizes the Company’s long-term debt as of March 31, 2025 and March 31, 2024:

 20252024
 PrincipalUnamortized Issuance CostsPrincipalUnamortized Issuance Costs
Senior Notes$600,000 $5,276 $600,000 $6,064 
Fourth Amended Credit Facility, due 2026490,000 1,183 210,000 1,971 
$1,090,000 $6,459 $810,000 $8,035 
Less: Unamortized issuance costs 6,459 8,035 
Long-term debt, net of unamortized issuance costs$1,083,541 $801,965 

The Company's Senior Notes comprise the following:

4.375% Senior Notes due 2027

On December 11, 2019, the Company issued $300,000 in aggregate principal amount of its 4.375% Senior Notes due December 15, 2027 (the “2027 Notes”). Proceeds from this offering, net of debt issuance costs were $296,250 and were utilized to pay down the Amended 2017 Revolver (defined below). The 2027 Notes bear interest at a rate of 4.375% per annum accruing from December 11, 2019. Interest is payable semiannually in arrears on June 15 and December 15 of each year, commencing on June 15, 2020. The 2027 Notes mature on December 15, 2027, unless earlier redeemed or repurchased in full and are unsecured and unsubordinated obligations of the Company. They are fully and unconditionally guaranteed, jointly and severally, by certain of its subsidiaries that are guarantors under the Fourth Amended Credit Facility (defined below). These guarantees are unsecured and unsubordinated obligations of such guarantors.

The Company may redeem, prior to September 15, 2027, all or a portion of the 2027 Notes at a price equal to 100% of the principal amount of the 2027 Notes to be redeemed, plus accrued and unpaid interest and a “make whole” premium to, but excluding, the redemption date. The Company may redeem, on or after September 15, 2027, all or a portion of the 2027 Notes at a price equal to 100% of the principal amount of the 2027 Notes, plus accrued and unpaid interest to, but excluding, the redemption date. If a change of control triggering event occurs, the Company will be required to offer to repurchase the 2027 Notes at a price in cash equal to 101% of the aggregate principal amount of the 2027 Notes, plus accrued and unpaid interest to, but excluding, the date of repurchase. The 2027 Notes were rank pari passu with the 2023 Notes (defined below) prior to their redemption.
6.625% Senior Notes due 2032

On January 11, 2024, the Company issued $300,000 in aggregate principal amount of its 6.625% Senior Notes due January 15, 2032 (the “2032 Notes”). Proceeds from this offering, net of debt issuance costs were $297,000 and were utilized to pay down the Fourth Amended Credit Facility. The 2032 Notes bear interest at a rate of 6.625% per annum accruing from January 11, 2024. Interest is payable semiannually in arrears on January 15 and July 15 of each year, commencing on July 15, 2024. The 2032 Notes mature on January 15, 2032, unless earlier redeemed or repurchased in full and are unsecured and unsubordinated obligations of the Company. They are fully and unconditionally guaranteed, jointly and severally, by certain of its subsidiaries that are guarantors under the Fourth Amended Credit Facility (defined below). These guarantees are unsecured and unsubordinated obligations of such guarantors.

The Company may redeem, prior to January 15, 2027, all or a portion of the 2032 Notes at a price equal to 100% of the aggregate principal amount of the 2032 Notes to be redeemed, plus accrued and unpaid interest and a “make whole” premium to, but excluding, the redemption date. The Company may redeem, on or after January 15, 2027, all or a portion of the 2032 Notes at a price equal to 100% of the principal amount of the 2032 Notes, plus accrued and unpaid interest and a redemption premium to, but excluding, the redemption date. The Company may, in compliance with certain conditions, on any one or more occasions redeem up to 40% of the original aggregate principal amount of the 2032 Notes, with the net cash proceeds of one or more equity offerings at a price equal to 106.625% of the aggregate principal amount of the 2032 Notes, plus accrued and unpaid interest to, but excluding, the redemption date. If a change of control triggering event occurs, the Company will be required to offer to repurchase the 2032 Notes at a price in cash equal to 101% of the aggregate principal amount of the 2032 Notes, plus accrued and unpaid interest to, but excluding, the date of repurchase.

2017 Credit Facility and Subsequent Amendments

In fiscal 2018, the Company entered into a credit facility (the “2017 Credit Facility”). The 2017 Credit Facility scheduled to mature on September 30, 2022, initially comprised a $600,000 senior secured revolving credit facility (“2017 Revolver”) and a $150,000 senior secured term loan (“2017 Term Loan”). The Company utilized the borrowings from the 2017 Credit Facility to repay its pre-existing credit facility.

In fiscal 2019, the Company amended the 2017 Credit Facility (as amended, the “Amended Credit Facility”) to fund the Alpha acquisition. The Amended Credit Facility consisted of $449,105 senior secured term loans (the “Amended Term Loan”), including a CAD 133,050 ($99,105) senior secured term loan and a $700,000 senior secured revolving credit facility (the “Amended Revolver”). The amendment resulted in an increase of the 2017 Term Loan and the 2017 Revolver by $299,105 and $100,000, respectively.

During the second quarter of fiscal 2022, the Company entered into a second amendment to the 2017 Credit Facility (as amended, the “Second Amended Credit Facility”). The Second Amended Credit Facility, scheduled to mature on September 30, 2026, consists of a $130,000 senior secured term loan (the “Second Amended Term Loan”), a CAD 106,440 ($84,229) senior secured term loan and an $850,000 senior secured revolving credit facility (the “Second Amended Revolver”). The second amendment resulted in a decrease of the Amended Term Loan by $150,000 and an increase of the Amended Revolver by $150,000.

During the second quarter of fiscal 2023, the Company entered into a third amendment to the 2017 Credit Facility (as amended, the “Third Amended Credit Facility”). The Third Amended Credit Facility provides a new incremental delayed-draw senior secured term loan up to $300,000 (the “Third Amended Term Loan”), which shall be available to draw at any time until March 15, 2023. Once drawn, the funds will mature on September 30, 2026, the same as the Company's Second Amended Term loan and Second Amended Revolver. In connection with the agreement, the Company incurred $1,161 in third party administrative and legal fees recognized in interest expense and capitalized $1,096 in charges from existing lenders as a deferred asset. During the fourth quarter of fiscal 2023, the Company drew $300,000 in the form of the Third Amended Term Loan. Additionally, the Company derecognized the capitalized deferred asset and recognized the $1,096 as a deferred financing costs.

During the fourth quarter of fiscal 2023, the Company entered into a fourth amendment to the 2017 Credit Facility (as amended, the “Fourth Amended Credit Facility”). The Fourth Amended Credit Facility replaces the London Interbank Offered Rate
(“LIBOR”) with the Secured Overnight Financing Rate (“SOFR”) in the calculation of interest for both the Second Amended Revolver and the Second Amended Term Loan.

In the fourth quarter of fiscal year 2024, we received proceeds from the issuance of the 2032 Senior Notes and paid down $86,488 and $188,750 towards the Second and Third Amended Term loans and wrote off $753 in deferred finance costs.

Subsequent to the fourth amendment, the quarterly installments payable on the Second Amended Term Loan are $2,607 beginning December 31, 2022, $3,911 beginning December 31, 2024 and $5,215 beginning December 31, 2025 with a final payment of $156,448 on September 30, 2026. The Fourth Amended Credit Facility may be increased by an aggregate amount of $350,000 in revolving commitments and /or one or more new tranches of term loans, under certain conditions. Both the Second Amended Revolver and the Second Amended Term Loan bear interest, at the Company's option, at a rate per annum equal to either (i) the SOFR or Canadian Dollar Offered Rate (“CDOR”) plus (i) Term SOFR plus between 1.125% and 2.25% (currently 1.250% and based on the Company's consolidated net leverage ratio) or (ii) the U.S. Dollar Base Rate (which equals, for any day a fluctuating rate per annum equal to the highest of (a) the Federal Funds Effective Rate plus 0.50%, (b) Bank of America “Prime Rate” and (c) the Eurocurrency Base Rate plus 1%; provided that, if the Base Rate shall be less than zero, such rate shall be deemed zero) (iii) the CDOR Base Rate equal to the higher of (a) Bank of America “Prime Rate” and (b) average 30-day CDOR rate plus 0.50%.

The quarterly installments payable on the Third Amended Term Loan are $3,750 beginning June 30, 2023, $5,625 beginning December 31, 2024 and $7,500 beginning December 31, 2025 with a final payment of $232,500 on September 30, 2026. The Third Amended Term Loan bears interest, at the Company's option, at a rate per annum equal to either (i) the Secured Overnight Financing Rate (“SOFR”) plus 10 basis points plus (i) Term SOFR plus between 1.375% and 2.50% (currently 1.500% and based on the Company's consolidated net leverage ratio) or (ii) the U.S. Dollar Base Rate plus between 0.375% and 1.50%, which equals, for any day a fluctuating rate per annum equal to the highest of (a) the Federal Funds Effective Rate plus 0.50%, (b) Bank of America “Prime Rate” and (c) the Term SOFR plus 1%; provided that, if the Base Rate shall be less than zero, such rate shall be deemed zero). Until the funds were drawn on March 13, 2023, the Company paid a commitment fee of 0.175% to 0.35% at a rate per annum on the unused portion.

Obligations under the Fourth Amended Credit Facility are secured by substantially all of the Company’s existing and future acquired assets, including substantially all of the capital stock of the Company’s United States subsidiaries that are guarantors under the Second Amended Credit Facility and up to 65% of the capital stock of certain of the Company’s foreign subsidiaries that are owned by the Company’s United States subsidiaries.

The Fourth Amended Credit Facility allows for up to two temporary increases in the maximum leverage ratio to 4.50x from 4.00x to 4.25x for a four quarter period following an acquisition larger than $250,000. Effective with the Third Amended Credit Facility, the maximum leverage ratio increased from 3.50x to 4.25x effective to the last day of the second quarter of fiscal year 2024 and decreasing subsequently to 4.00x.

As of March 31, 2025, the Company had $280,000 outstanding on the Second Amended Revolver, $110,000 under the Second Amended Term Loan and $100,000 outstanding under the Third Amended Term Loan.

Interest Rates on Long Term Debt

The weighted average interest rate on the long term debt at March 31, 2025 and March 31, 2024, was 4.5% and 5.2%, respectively.

Interest Paid

The Company paid in cash, $48,806, $48,080 and $58,368, net of interest received, for interest during the fiscal years ended March 31, 2025, 2024 and 2023, respectively.

Covenants

The Company’s financing agreements contain various covenants, which, absent prepayment in full of the indebtedness and other obligations, or the receipt of waivers, would limit the Company’s ability to conduct certain specified business transactions including incurring debt, mergers, consolidations or similar transactions, buying or selling assets out of the ordinary course of business, engaging in sale and leaseback transactions, paying dividends and certain other actions. The Company is in compliance with all such covenants.
Short-Term Debt

As of March 31, 2025 and 2024, the Company had $28,502 and $30,444, respectively, of short-term borrowings. The weighted-average interest rate on these borrowings was approximately 4.7% and 6.7%, respectively, for fiscal years ended March 31, 2025 and 2024.

Letters of Credit

As of March 31, 2025 and 2024, the Company had $5,584 and $3,919, respectively, of standby letters of credit.

Debt Issuance Costs

The Company capitalized $4,412 in debt issuance costs in connection with the issuance of the Senior Notes. We also wrote off $753 in deferred financing costs related to the Second and Third Amended Term Loans. Amortization expense, relating to debt issuance costs, included in interest expense was $0, $1,697, and $1,964 for the fiscal years ended March 31, 2025, 2024 and 2023, respectively. Debt issuance costs, net of accumulated amortization, totaled $6,459 and $8,035 as of March 31, 2025 and 2024, respectively.

Available Lines of Credit

As of March 31, 2025 and 2024, the Company had available and undrawn, under all its lines of credit, $652,552 and $938,334, respectively, including $87,982 and $90,866, respectively, of uncommitted lines of credit as of March 31, 2025 and March 31, 2024.
v3.25.1
Other Liabilities
12 Months Ended
Mar. 31, 2025
Other Liabilities Disclosure [Abstract]  
Other Liabilities Other Liabilities
Other liabilities consist of the following:

 March 31,
 20252024
Operating lease liabilities$67,033 $61,687 
Warranty38,331 34,515 
Long-term interest rate swaps33,002 19,167 
Pension25,307 25,512 
Liability for uncertain tax positions3,335 3,300 
Contract liabilities2,801 959 
Other5,109 6,742 
Total$174,918 $151,882 
v3.25.1
Fair Value of Financial Instruments
12 Months Ended
Mar. 31, 2025
Fair Value Disclosures [Abstract]  
Fair Value of Financial Instruments Fair Value of Financial Instruments
Recurring Fair Value Measurements

The following tables represent the financial assets and (liabilities) measured at fair value on a recurring basis as of March 31, 2025 and March 31, 2024 and the basis for that measurement:
Total Fair Value Measurement March 31, 2025Quoted Price in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Lead forward contracts$(225)$— $(225)$— 
Foreign currency forward contracts1,629 — 1,629 — 
Interest rate swaps— — 
Net investment hedges(33,002)— (33,002)— 
Total derivatives$(31,593)$— $(31,593)$— 
 
Total Fair Value Measurement March 31, 2024Quoted Price in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Lead forward contracts$(835)$— $(835)$— 
Foreign currency forward contracts— — 
Interest Rate Swaps2,696 2,696 
Net investment hedges(19,167)— (19,167)— 
Total derivatives$(17,301)$— $(17,301)$— 

The fair values of lead forward contracts are calculated using observable prices for lead as quoted on the London Metal Exchange (“LME”) and, therefore, were classified as Level 2 within the fair value hierarchy as described in Note 1, Summary of Significant Accounting Policies.

The fair values for foreign currency forward contracts, interest rate swaps, and net investment hedges are based upon current quoted market prices and are classified as Level 2 based on the nature of the underlying market in which these derivatives are traded.

The fair value of interest rate swap agreements are based on observable prices as quoted for receiving the variable one month term SOFR and paying fixed interest rates and, therefore, were classified as Level 2.

Financial Instruments

The fair values of the Company’s cash and cash equivalents approximate carrying value due to their short maturities.

The fair value of the Company’s short-term debt and borrowings under the Second Amended Credit Facility (as defined in Note 10), approximate their respective carrying value, as they are variable rate debt and the terms are comparable to market terms as of the balance sheet dates and are classified as Level 2.

The fair value of the Company's 2032 Notes and 2027 Notes, (collectively, the “Senior Notes”) represent the trading values based upon quoted market prices and are classified as Level 2. The 2032 Notes were trading at approximately 101% and 100% of face value on March 31, 2025 and March 31, 2024, respectively. The 2027 Notes were trading at approximately 96% and 94% of face value on March 31, 2025 and March 31, 2024, respectively.
The carrying amounts and estimated fair values of the Company’s derivatives and Senior Notes at March 31, 2025 and 2024 were as follows:

 March 31, 2025March 31, 2024
 Carrying
Amount
Fair ValueCarrying
Amount
Fair Value
Financial assets:
Derivatives(1)
$— $— $— $— 
Financial liabilities:
Senior Notes (2)
$600,000 $591,420 $600,000 $582,750 
Derivatives(1)
(31,593)(31,593)(17,301)(17,301)
(1)Represents lead, foreign currency forward contracts, interest rate swaps, and net investment hedges (see Note 14 for asset and liability positions of the lead, foreign currency forward contracts and net investment hedges at March 31, 2025 and March 31, 2024).
(2)The fair value amount of the Senior Notes at March 31, 2025 and March 31, 2024 represent the trading value of the instruments.

Non-recurring fair value measurements

The valuation of goodwill and other intangible assets is based on information and assumptions available to the Company at the time of acquisition, using income and market approaches to determine fair value. The Company tests goodwill and other intangible assets annually for impairment, or when indications of potential impairment exist (see Note 1).

Goodwill is tested for impairment by determining the fair value of the Company’s reporting units. The unobservable inputs used to measure the fair value of the reporting units include projected growth rates, profitability, and the risk factor premium added to the discount rate. The remeasurement of the reporting unit fair value is classified as a Level 3 fair value assessment due to the significance of unobservable inputs developed using company-specific information.

The inputs used to measure the fair value of other intangible assets were largely unobservable and accordingly were also classified as Level 3. The fair value of trademarks is based on an estimate of the royalties saved that would have been paid to a third party had the Company not owned the trademark. The fair value of other indefinite-lived intangibles was estimated using the income approach, based on cash flow projections of revenue growth rates, taking into consideration industry and market conditions.

On November 8, 2023, the Company's Board of Directors approved a plan to stop production and operations of residential renewable energy products, which include our OutBack and Mojave brands. Management determined that residential renewable energy products no longer fit with the Company’s core strategy and resources will be better allocated toward commercial energy solutions for enterprise customers. As a result the Company's indefinite-lived trademark, which were acquired through acquisition, was recorded at fair value on a non-recurring basis at $880 and the remeasurement resulted in an impairment of $6,020 in the third quarter of fiscal 2024. In determining the fair value of these assets, the Company used a royalty rate of 1.5% based on comparable market rates and used discount rate of 24.5%. The inputs used to measure the fair value were largely unobservable and accordingly were classified as Level 3.

In the fourth quarter of fiscal 2024, the Company finalized a strategy to stop marketing certain brands including the Purcell products. These indefinite-lived trademarks, which were acquired through acquisitions, were recorded at fair value on a non-recurring basis at $7,599 and the remeasurement resulted in the full impairment charge of the carrying value.

In connection with the annual impairment testing conducted as of January 2, 2023, two of the Company's indefinite-lived trademarks, which were acquired through acquisitions, were recorded at fair value on a non-recurring basis at $6,900 and the remeasurements resulted in an impairment of $480. In determining the fair value of these assets, the Company used a royalty rate of 1.5% based on comparable market rates and used discount rate of 24.0%.

These impairment charges relating to goodwill and indefinite-lived trademarks are included under the captions Impairment of goodwill and Impairment of indefinite-lived intangibles in the Consolidated Statements of Income.

Ooltewah
On June 29, 2022, the Company committed to a plan to close its facility in Ooltewah, Tennessee, which focused on manufacturing flooded motive power batteries for electric forklifts. Management determined that future demand for traditional motive power flooded cells will decrease as customers transition to maintenance free product solutions in lithium and Thin Plate Pure Lead (TPPL). As a result, the Company concluded that the carrying value of the asset group was not recoverable and recorded during the first quarter of fiscal 2023 a write-off of $7,300 of the fixed assets, for which there is expected to be no salvageable value. The valuation technique used to measure the fair value of fixed assets was a combination of the income and market approaches. The inputs used to measure the fair value of these fixed assets under the income approach were largely unobservable and accordingly were classified as Level 3

Hagen, Germany

In fiscal 2021, the Company committed to a plan to substantially close all of its facility in Hagen, Germany, which produces flooded motive power batteries for forklifts. Management determined that future demand for the motive power batteries produced at this facility was not sufficient, given the conversion from flooded to maintenance free batteries by customers, the existing number of competitors in the market, as well as the near term decline in demand and increased uncertainty from the pandemic. As a result, the Company concluded that the carrying value of the asset group is not recoverable and recorded a write-off of $3,975 of the fixed assets to their estimated fair value of $14,456, which was recognized in the third quarter of fiscal 2021. The valuation technique used to measure the fair value of fixed assets was a combination of the income and market approaches. The inputs used to measure the fair value of these fixed assets under the income approach were largely unobservable and accordingly were classified as Level 3.
In the fourth quarter of fiscal 2025, the Company reclassified property, plant and equipment with a carrying value of $7,000 to assets held for sale on the Consolidated Balance Sheet and recognized an impairment loss of $4,867 under the caption Loss on assets held for sale on its consolidated statement of income, by recording the carrying value of these assets to their estimated fair value of $2,113, based on a non-recurring basis. The fair value was based on the expected proceeds, less costs to sell.
v3.25.1
Derivative Financial Instruments
12 Months Ended
Mar. 31, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivative Financial Instruments Derivative Financial Instruments
The Company utilizes derivative instruments to reduce its exposure to fluctuations in commodity prices, foreign exchange rates and interest under established procedures and controls. The Company does not enter into derivative contracts for speculative purposes. The Company’s agreements are with creditworthy financial institutions and the Company anticipates performance by counterparties to these contracts and therefore no material loss is expected.

Derivatives in Cash Flow Hedging Relationships

Lead Forward Contracts

The Company enters into lead forward contracts to fix the price for a portion of its lead purchases. Management considers the lead forward contracts to be effective against changes in the cash flows of the underlying lead purchases. The vast majority of such contracts are for a period not extending beyond one year. At March 31, 2025 and 2024, the Company has hedged the price to purchase approximately 70.0 million pounds and 53.0 million pounds of lead, respectively, for a total purchase price of $63,841 and $49,977, respectively.

Foreign Currency Forward Contracts

The Company uses foreign currency forward contracts and options to hedge a portion of the Company’s foreign currency exposures for lead, as well as other foreign currency exposures so that gains and losses on these contracts offset changes in the underlying foreign currency denominated exposures. The vast majority of such contracts are for a period not extending beyond one year. As of March 31, 2025 and 2024, the Company had entered into a total of $39,196 and $46,159, respectively, of such contracts.

Interest Rate Swap Agreements
The Company is exposed to changes in variable interest rates on borrowings under our credit agreement. On a selective basis, from time to time, it enters into interest rate swap agreements to reduce the negative impact that increases in interest rates could have on our outstanding variable rate debt. At March 31, 2025 and 2024 such agreements effectively convert $200,000 of our variable-rate debt to a fixed-rate basis, utilizing the one-month term SOFR, as a floating rate reference. Fluctuations in SOFR and fixed rates affect both our net financial investment position and the amount of cash to be paid or received by us under these agreements.

Derivatives in Net Investment Hedging Relationships

Net Investment Hedges

The Company uses cross currency fixed interest rate swaps to hedge its net investments in foreign operations against future volatility in the exchange rates between the U.S. Dollar and Euro.

On September 29, 2022, the Company terminated its $300,000 cross-currency fixed interest rate swap contracts, originally entered into on December 23, 2021, and received a net settlement of $43,384. The cash proceeds were included in Proceeds from termination of net investment hedges in our Consolidated Statements of Cash Flows.

On September 29, 2022, the Company entered into cross-currency fixed interest rate swap contracts with an aggregate notional amount of $150,000, maturing on December 15, 2027. On July 2, 2024, the Company entered into cross-currency fixed interest rate swap contracts with an aggregate notional amount of $150,000, maturing on January 15, 2029. Additionally, on December 23, 2024 and December 24, 2024 , the Company entered into cross-currency fixed interest rate swap contracts each with an aggregate notional amount of $150,000, maturing on June 15, 2028 and December 15, 2026, respectively. The cross-currency fixed interest rate swap contracts qualify for hedge accounting as a net investment hedging instrument, which allows for them to be remeasured to foreign currency translation adjustment within AOCI (“Accumulated Other Comprehensive Income”) to offset the translation risk from those investments. Balances in the foreign currency translation adjustment accounts remain until the sale or substantially complete liquidation of the foreign entity, upon which they are recognized as a component of income (expense).

Impact of Hedging Instruments on AOCI

In the coming twelve months, the Company anticipates that $12,569 of pretax gain relating to lead, foreign currency forward contracts, interest rate swaps, and net investment hedges will be reclassified from AOCI as part of cost of goods sold and interest expense. This amount represents the current net unrealized impact of hedging lead, foreign exchange rates and interest rates, which will change as market rates change in the future. This amount will ultimately be realized in the Consolidated Statements of Income as an offset to the corresponding actual changes in lead, foreign exchange rates and lead costs resulting from variable lead cost, foreign exchange and interest rates hedged.

Derivatives not Designated in Hedging Relationships

Foreign Currency Forward Contracts

The Company also enters into foreign currency forward contracts to economically hedge foreign currency fluctuations on intercompany loans and foreign currency denominated receivables and payables. These are not designated as hedging instruments and changes in fair value of these instruments are recorded directly in the Consolidated Statements of Income. As of March 31, 2025 and 2024, the notional amount of these contracts was $63,146 and $69,319, respectively.
Presented below in tabular form is information on the location and amounts of derivative fair values in the Consolidated Balance Sheets and derivative gains and losses in the Consolidated Statements of Income:

Fair Value of Derivative Instruments
March 31, 2025 and 2024
 Derivatives and Hedging Activities Designated as Cash Flow HedgesDerivatives and Hedging Activities Designated as Net Investment HedgesDerivatives and Hedging Activities Not Designated as Hedging Instruments
 March 31, 2025March 31, 2024March 31, 2025March 31, 2024March 31, 2025March 31, 2024
Prepaid and other current assets:
Lead forward contracts$— $— $— $— $— $— 
Foreign currency forward contracts— 396 — — 1,919 — 
Other Assets:
Interest rate swaps2,696 — — — — 
Total assets$$3,092 $— $— $1,919 $— 
Accrued expenses:
Lead forward contracts$225 $835 $— $— $— $— 
Foreign currency forward contracts290 — — — — 391 
Other liabilities:
Interest rate swaps— — — — — — 
Net investment hedges— — 33,002 19,167 — — 
Total liabilities$515 $835 $33,002 $19,167 $— $391 


The Effect of Derivative Instruments on the Consolidated Statements of Income
For the fiscal year ended March 31, 2025

 
Derivatives Designated as Cash Flow HedgesPretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)Location of Gain
(Loss) Reclassified
from
AOCI into Income
(Effective Portion)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Lead forward contracts$(3,703)Cost of goods sold$(4,880)
Foreign currency forward contracts1,475 Cost of goods sold1,297 
Interest Rate Swaps (825)Interest expense1,866 
Total$(3,053)$(1,717)

Derivatives Designated as Net Investment HedgesPretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)Location of Gain
(Loss) Reclassified
from
AOCI into Income
(Effective Portion)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Cross currency fixed interest rate swaps$(9,422)Interest expense$4,413 
Total$(9,422)$4,413 
 
Derivatives Not Designated as Hedging InstrumentsLocation of Gain (Loss)
Recognized in Income
on Derivatives
Pretax Gain (Loss)
Foreign currency forward contractsOther (income) expense, net$3,136 
Total$3,136 
The Effect of Derivative Instruments on the Consolidated Statements of Income
For the fiscal year ended March 31, 2024

 
Derivatives Designated as Cash Flow HedgesPretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)Location of Gain
(Loss) Reclassified
from
AOCI into Income
(Effective Portion)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Lead forward contracts$(455)Cost of goods sold$5,388 
Foreign currency forward contracts1,740 Cost of goods sold612 
Interest rate swaps6,915 Interest Expense3,057 
Total$8,200 $9,057 

Derivatives Designated as Net Investment HedgesPretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)Location of Gain
(Loss) Reclassified
from
AOCI into Income
(Effective Portion)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Cross currency fixed interest rate swaps$(2,695)Interest expense$713 
Total$(2,695)$713 
 
Derivatives Not Designated as Hedging InstrumentsLocation of Gain (Loss)
Recognized in Income
on Derivatives
Pretax Gain (Loss)
Foreign currency forward contractsOther (income) expense, net$(846)
Total$(846)
The Effect of Derivative Instruments on the Consolidated Statements of Income
For the fiscal year ended March 31, 2023

 
Derivatives Designated as Cash Flow HedgesPretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)Location of Gain
(Loss) Reclassified
from
AOCI into Income
(Effective Portion)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Lead forward contracts$(3,883)Cost of goods sold$(3,765)
Foreign currency forward contracts1,849 Cost of goods sold2,589 
Interest rate swaps$(1,162)Interest expense$— 
Total$(3,196)$(1,176)

Derivatives Designated as Net Investment HedgesPretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)Location of Gain
(Loss) Reclassified
from
AOCI into Income
(Effective Portion)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Cross currency fixed interest rate swaps$29,201 Interest expense$3,587 
Total$29,201 $3,587 
 
Derivatives Not Designated as Hedging InstrumentsLocation of Gain (Loss)
Recognized in Income
on Derivatives
Pretax Gain (Loss)
Foreign currency forward contractsOther (income) expense, net$1,182 
Total$1,182 
v3.25.1
Income Taxes
12 Months Ended
Mar. 31, 2025
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
 Fiscal year ended March 31,
 202520242023
Current income tax expense
Current:
Federal$39,021 $21,785 $21,203 
State11,147 3,252 5,654 
Foreign24,599 27,396 23,208 
Total current income tax expense74,767 52,433 50,065 
Deferred income tax (benefit) expense
Federal(6,000)(25,008)(18,370)
State(1,446)(3,564)(2,534)
       Foreign(24,479)(772)5,668 
Total deferred income tax (benefit) expense(31,925)(29,344)(15,236)
Total income tax expense$42,842 $23,089 $34,829 

Earnings before income taxes consists of the following:
 
 Fiscal year ended March 31,
 202520242023
United States$201,332 $99,230 $38,703 
Foreign205,245 192,955 171,936 
Earnings before income taxes$406,577 $292,185 $210,639 

Income taxes paid by the Company for the fiscal years ended March 31, 2025, 2024 and 2023 were $40,410, $28,810 and $46,309, respectively.
The following table sets forth the tax effects of temporary differences that give rise to significant portions of the deferred tax assets and liabilities:
 
 March 31,
 20252024
Deferred tax assets:
Accounts receivable$278 $309 
Inventories13,154 13,472 
Net operating loss carryforwards44,442 51,005 
Lease liabilities21,016 20,081 
Capitalized R&D Expenditures48,856 32,740 
Accrued expenses42,909 35,132 
Other assets22,080 29,079 
Gross deferred tax assets192,735 181,818 
Less valuation allowance(25,594)(35,754)
Total deferred tax assets167,141 146,064 
Deferred tax liabilities:
Property, plant and equipment49,025 45,493 
Lease Right-of-use assets21,016 20,071 
Intangible assets32,332 56,726 
Other liabilities7,616 4,560 
Total deferred tax liabilities109,989 126,850 
Net deferred tax assets (liabilities)$57,152 $19,214 

The Company has approximately $359 in United States federal net operating loss carryforwards, all of which are limited by Section 382 of the Internal Revenue Code, with expirations between fiscal 2025 and fiscal 2028. The Company has approximately $155,259 of foreign net operating loss carryforwards, of which $110,599 may be carried forward indefinitely and $44,660 expire between fiscal 2025 and fiscal 2043. In addition, the Company also has approximately $18,806 of state net operating loss carryforwards with expirations between fiscal 2028 and fiscal 2045.

The following table sets forth the changes in the Company's valuation allowance for fiscal 2025, 2024 and 2023:

Balance at
Beginning of
Period
Additions
Charged to
Expense
Valuation Allowance Reversal
Other(1)
Balance at
End of
Period
Fiscal year ended March 31, 202331,017 2,654 (586)(1,913)31,172 
Fiscal year ended March 31, 202431,172 9,463 (2,614)(2,267)35,754 
Fiscal year ended March 31, 202535,754 4,949 (9,219)(5,890)25,594 
(1)Includes the impact of currency changes and the expiration of net operating losses for which a full valuation allowance was recorded.

As of March 31, 2025 and 2024, the Company had no federal valuation allowance and the valuation allowance associated with the state tax jurisdictions was $468 and $535, respectively.

As of March 31, 2025 and 2024, the valuation allowance associated with certain foreign tax jurisdictions was $25,126 and $35,219, respectively. Of the net decrease of $(10,093), $(4,203) was recorded as a decrease to tax expense primarily related to deferred tax assets utilized in the current year that were previously not more likely than not to be realized, and by $(5,890) primarily related to foreign currency translation adjustments and expiration of foreign net operating losses for which a full valuation allowance was recorded.
A reconciliation of income taxes at the statutory rate (21.0% for fiscal 2025, 2024 and 2023) to the income tax provision is as follows:
 
 Fiscal year ended March 31,
 202520242023
United States statutory income tax expense$85,381 $61,358 $44,233 
Increase (decrease) resulting from:
State income taxes, net of federal effect7,361 (995)1,714 
Nondeductible expenses and other 14,135 3,833 6,028 
Net effect of GILTI, FDII, BEAT3,322 3,313 2,457 
Effect of foreign operations(14,074)(17,475)(12,978)
Valuation allowance(4,270)6,849 2,068 
Research and Development Credit(5,652)(5,158)(5,063)
AMPC Impact(38,764)(28,636)(3,630)
Tax Act(4,597)— — 
Income tax expense$42,842 $23,089 $34,829 

The Organization for Economic Co-operation and Development (OECD) has a global minimum corporate tax of 15% for companies with global revenues and profits above certain thresholds (referred to as Pillar 2), with certain aspects of Pillar 2 effective for taxable years beginning after December 31, 2023. While it is uncertain whether the U.S. will enact legislation to adopt Pillar 2, certain countries in which we operate have adopted legislation, and other countries are in the process of introducing legislation to implement Pillar 2. The impact to the Company is not material in the current year.

On August 26, 2024, the U.S. Tax Court issued a ruling in Varian Medical Systems, Inc. v. Commissioner ("Varian"). The ruling related to the U.S. taxation of deemed foreign dividends in the transition tax of the Tax Cuts and Jobs Act (“Tax Act”) which was originally recorded in fiscal 2018. The impact of the enacted legislation and ruling is included in our fiscal year results. The Company will continue to monitor and evaluate as new legislation and guidance is issued.

In fiscal 2025 the Company entered into a cost sharing arrangement and platform contribution transaction (“IP Transaction”) related to certain intellectual property between the EnerSys U.S. and a Swiss subsidiary. Although the transaction between consolidated entities did not result in any gain in the consolidated statement of operations, the Company recorded a net tax expense of approximately $2,500 primarily due to the difference in the tax rate between the US and Switzerland. The net expense represents the tax recognized by the selling jurisdiction offset by the value of future tax deductions for amortization of the assets in the acquiring jurisdiction.

The effective income tax rates for the fiscal years ended March 31, 2025, 2024 and 2023 were 10.5%, 7.9% and 16.5%, respectively. The effective income tax rate with respect to any period may be volatile based on the mix of income in the tax jurisdictions in which the Company operates and the amount of its consolidated income before taxes. The rate increase in fiscal 2025 compared to fiscal 2024 is primarily due to the impact of Pillar 2, IP Transaction, and mix of earnings among tax jurisdictions offset by the impact of Varian. The rate decrease in fiscal 2024 compared to fiscal 2023 is primarily due to the impact of IRA offset by changes in mix of earnings among tax jurisdictions.

In fiscal 2025, the foreign effective income tax rate on foreign pre-tax income of $205,245 was 0.1%. In fiscal 2024, the foreign effective income tax rate on foreign pre-tax income of $192,955 was 13.8% and in fiscal 2023, the foreign effective income tax rate on foreign pre-tax income of $171,936 was 16.8%. The rate decrease in fiscal 2025 compared to fiscal 2024 is primarily due the IP Transaction offset by changes in mix of earnings among tax jurisdictions. The rate decrease in fiscal 2024 compared to fiscal 2023 is primarily due to additional income taxes recorded on undistributed earnings in fiscal 2023 and changes in mix of earnings among tax jurisdictions.

Income from the Company's Swiss subsidiary comprised a substantial portion of its overall foreign mix of income for the fiscal years ended March 31, 2025, 2024 and 2023 and was taxed at approximately (13)%, 9% and 7%, respectively. The rate decrease in fiscal 2025 compared to fiscal 2024 is primarily related to the IP Transaction.

The Company has approximately $1,342,000 and $1,352,000 of undistributed earnings of foreign subsidiaries for fiscal years 2025 and 2024, respectively. A small portion of the above earnings were no longer considered indefinitely reinvested, as a result, the Company recorded additional income taxes in prior years. The Company intends to continue to be indefinitely
reinvested on the remaining undistributed foreign earnings and outside basis differences and therefore, no additional income taxes have been provided.

Uncertain Tax Positions

The following table summarizes activity of the total amounts of unrecognized tax benefits:

 Fiscal year ended March 31,
 202520242023
Balance at beginning of year$2,845 $3,495 $4,770 
Increases related to current year tax positions630 (2)24 
Increases related to prior year tax positions— — (1)
Decreases related to prior tax positions — (129)— 
Decreases related to prior year tax positions settled— — (77)
Lapse of statute of limitations(595)(519)(1,221)
Balance at end of year$2,880 $2,845 $3,495 

All of the balance of unrecognized tax benefits at March 31, 2025, if recognized, would be included in the Company’s Consolidated Statements of Income and have a favorable impact on both the Company’s net earnings and effective tax rate.

The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction, and various states and foreign jurisdictions and is routinely subject to income tax examinations. As of March 31, 2025, the most significant tax examinations in process are the United States and Switzerland. The Company regularly assesses the likely outcomes of its tax audits and disputes to determine the appropriateness of its tax reserves. However, any tax authority could take a position on tax treatment that is contrary to the Company’s expectations, which could result in tax liabilities in excess of reserves. With few exceptions, the Company is no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities for years before 2009.

While the net effect on total unrecognized tax benefits cannot be reasonably estimated, approximately $668 is expected to reverse in fiscal 2026 due to expiration of various statute of limitations.

The Company recognizes tax related interest and penalties in income tax expense in its Consolidated Statements of Income. As of March 31, 2025 and 2024, the Company had an accrual of $455 and $455, respectively, for interest and penalties.
v3.25.1
Retirement Plans
12 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Retirement Plans Retirement Plans
Defined Benefit Plans

The Company sponsors several retirement and pension plans covering eligible salaried and hourly employees. The Company uses a measurement date of March 31 for its pension plans.

Net periodic pension cost for fiscal 2025, 2024 and 2023, includes the following components:
 
 United States PlansInternational Plans
 Fiscal year ended March 31,Fiscal year ended March 31,
 202520242023202520242023
Service cost$— $— $— $954 $884 $918 
Interest cost491 657 582 2,501 2,215 1,715 
Expected return on plan assets(141)(424)(455)(1,421)(1,244)(2,005)
Amortization and deferral(61)— — 582 326 478 
Settlement gain (1,548)— — — — — 
Net periodic benefit cost$(1,259)$233 $127 $2,616 $2,181 $1,106 
The following table sets forth a reconciliation of the related benefit obligation, plan assets, and accrued benefit costs related to the pension benefits provided by the Company for those employees covered by defined benefit plans:
 
 United States PlansInternational Plans
 March 31,March 31,
  
2025202420252024
Change in projected benefit obligation
Benefit obligation at the beginning of the period$13,313 $14,056 $55,806 $51,718 
Service cost— — 954 884 
Interest cost491 657 2,501 2,215 
Benefits paid, inclusive of plan expenses(635)(865)(2,759)(2,353)
Plan curtailments and settlements(13,338)— — — 
Plan combinations — — — 1,835 
Actuarial (gains) losses 169 (535)(3,601)633 
Foreign currency translation adjustment— 901 874 
Benefit obligation at the end of the period$— $13,313 $53,802 $55,806 

Change in plan assets
Fair value of plan assets at the beginning of the period$15,153 $13,975 $32,563 $40,104 
Actual return on plan assets(23)2,043 (2,075)(7,717)
Employer contributions— — 1,720 1,655 
Benefits paid, inclusive of plan expenses(635)(865)(2,759)(2,353)
Plan curtailments and settlements(13,338)— — — 
Foreign currency translation adjustment— — 715 874 
Fair value of plan assets at the end of the period$1,157 $15,153 $30,164 $32,563 
Funded status surplus (deficit)$1,157 $1,840 $(23,638)$(23,243)
 
 March 31,
 20252024
Amounts recognized in the Consolidated Balance Sheets consist of:
Non-current assets$4,409 $5,606 
Accrued expenses(1,583)(1,497)
Other liabilities(25,307)(25,512)
Funded status deficit$(22,481)$(21,403)

The following table represents pension components (before tax) and related changes (before tax) recognized in AOCI for the Company’s pension plans for the years ended March 31, 2025, 2024 and 2023:
 Fiscal year ended March 31,
 202520242023
Amounts recorded in AOCI before taxes:
Prior service cost$(43)$(85)$(128)
Net loss(11,145)(9,590)(2,307)
Net amount recognized$(11,188)$(9,675)$(2,435)

The following table represents changes in plan assets and benefit obligations recognized in AOCI for the Company’s pension plans for the years ended March 31, 2025, 2024 and 2023:
 
 Fiscal year ended March 31,
 202520242023
Changes in plan assets and benefit obligations:
New prior service cost$— $— $— 
Net loss (gain) arising during the year228 7,439 (10,352)
Effect of exchange rates on amounts included in AOCI260 127 (957)
Amounts recognized as a component of net periodic benefit costs:
Amortization of prior service cost(42)(42)(41)
Amortization or settlement recognition of net loss1,069 (284)(438)
Total recognized in other comprehensive (income) loss$1,515 $7,240 $(11,788)

The amounts included in AOCI as of March 31, 2025 that are expected to be recognized as components of net periodic pension cost (before tax) during the next twelve months are as follows:
 
Prior service cost$(42)
Net loss(567)
Net amount expected to be recognized$(609)

The accumulated benefit obligation related to all defined benefit pension plans and information related to unfunded and underfunded defined benefit pension plans at the end of each fiscal year are as follows:
 
 United States PlansInternational Plans
 March 31,March 31,
 2025202420252024
All defined benefit plans:
Accumulated benefit obligation$— $13,313 $51,690 $53,169 
Unfunded defined benefit plans:
Projected benefit obligation$— $— $26,871 $27,009 
Accumulated benefit obligation— — 24,787 24,930 
Defined benefit plans with a projected benefit obligation in excess of the fair value of plan assets:
Projected benefit obligation$— $— $27,214 $27,009 
Fair value of plan assets— — 325 — 
Defined benefit plans with an accumulated benefit obligation in excess of the fair value of plan assets:
Projected benefit obligation$— $— $26,871 $27,009 
Accumulated benefit obligation— — 24,787 24,930 
Fair value of plan assets— — — — 
Assumptions

Significant assumptions used to determine the net periodic benefit cost for the U.S. and International plans were as follows:

 
 United States PlansInternational Plans
 Fiscal year ended March 31,Fiscal year ended March 31,
 202520242023202520242023
Discount rate5.2 %4.9 %3.7 %
3.8%-5.3%
3.5%-6.0%
1.5%-5.4%
Expected return on plan assets3.25 5.5 5.5 
4.8-5
4-4.7
3.1-5.3
Rate of compensation increaseN/AN/AN/A
2.5-4.5
2.3-4.5
1.8-5.5
N/A = not applicable

Significant assumptions used to determine the projected benefit obligations for the U.S. and International plans were as follows:

 
 United States PlansInternational Plans
 March 31,March 31,
 2025202420252024
Discount rateN/A5.2 %
3.3%-5.9%
3.8%-5.3%
Rate of compensation increaseN/AN/A
2.0-4.5
2.5-4.5
 N/A = not applicable

The United States plans do not include compensation in the formula for determining the pension benefit as it is based solely on years of service.

The expected long-term rate of return for the Company’s pension plan assets is based upon the target asset allocation and is determined using forward looking assumptions in the context of historical returns and volatilities for each asset class, as well as correlations among asset classes. The Company evaluates the rate of return assumptions for each of its plans on an annual basis.

Pension Plan Investment Strategy

The US plan has been terminated during fiscal 2025. Once all expenses associated with the plan termination have been paid, any excess cash will be returned to the company. In fiscal 2024, the UK plan entered in an annuity insurance contract and now the UK plan is fully insured.
The following table represents the Company's pension plan investments measured at fair value as of March 31, 2025 and 2024 and the basis for that measurement:

 March 31, 2025
 United States PlansInternational Plans
 Total Fair
Value
Measurement
Quoted Price
In Active
Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Total Fair
Value
Measurement
Quoted Price
In Active
Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Asset category:
Cash and cash equivalents$1,157 $1,157 $— $— $3,252 $3,252 $— $— 
Equity securities
US(a)
— — — — — — — — 
International(b)
— — — — — — — — 
Fixed income(c)
— — — — 324 — 324 — 
Other investments(d)
— — — — 26,588 — — 26,588 
Total$1,157 $1,157 $— $— $30,164 $3,252 $324 $26,588 
 
 March 31, 2024
 United States PlansInternational Plans
 Total Fair
Value
Measurement
Quoted Price
In Active
Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Total Fair
Value
Measurement
Quoted Price
In Active
Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Asset category:
Cash and cash equivalents$5,473 $5,473 $— $— $3,752 $3,752 $— $— 
Equity securities
US(a)
— — — — — — — — 
International(b)
— — — — — — — — 
Fixed income(c)
9,680 9,680 — — 314 — 314 — 
Other investments(d)
— — — — 28,497 — — 28,497 
Total$15,153 $15,153 $— $— $32,563 $3,752 $314 $28,497 

The fair values presented above were determined based on valuation techniques to measure fair value as discussed in Note 1.
(a)US equities include companies that are well diversified by industry sector and equity style (i.e., growth and value strategies). Active and passive management strategies are employed. Investments are primarily in large capitalization stocks and, to a lesser extent, mid- and small-cap stocks.
(b)International equities are invested in companies that are traded on exchanges outside the U.S. and are well diversified by industry sector, country and equity style. Active and passive strategies are employed. The vast majority of the investments are made in companies in developed markets with a small percentage in emerging markets.
(c)Fixed income consists primarily of investment grade bonds from diversified industries.
(d)Other investments consists of a buy-in annuity insurance contract. The fair value of the buy-in policy is set equal to the value of the obligations as determined by the actuary. This value is considered Level 3 due to the use of the significant unobservable inputs.

Level 3 Rollforward

The following presents our Level 3 Rollforward for our defined pension plan assets:
Beginning of year balance as of March 31, 2024$28,497 
Actual return on plan assets, relating to assets still held at the reporting date$(1,511)
Purchases$(1,024)
Change due to exchange rate changes$626 
End of year balance as of March 31, 2025$26,588 


The Company expects to make cash contributions of approximately $1,616 to its pension plans in fiscal 2026.
Estimated future benefit payments under the Company’s pension plans are as follows:
 
2026$2,588 
20272,468 
20283,014 
20293,579 
20303,965 
Years 2031-203520,097 

Defined Contribution Plan

The Company maintains defined contribution plans primarily in the U.S. and U.K. eligible employees can contribute a portion of their pre-tax and / or after-tax income in accordance with plan guidelines and the Company will make contributions based on the employees’ eligible pay and /or will match a percentage of the employee contributions up to certain limits. Matching contributions charged to expense for the fiscal years ended March 31, 2025, 2024 and 2023 were $22,031, $22,819 and $20,933, respectively.
v3.25.1
Stockholders’ Equity
12 Months Ended
Mar. 31, 2025
Equity [Abstract]  
Stockholders’ Equity Stockholders’ Equity
Preferred Stock and Common Stock

The Company’s certificate of incorporation authorizes the issuance of up to 1,000,000 shares of preferred stock, par value $0.01 per share (“Preferred Stock”). At March 31, 2025 and 2024, no shares of Preferred Stock were issued or outstanding. The Board of Directors of the Company has the authority to specify the terms of any Preferred Stock at the time of issuance.

The following demonstrates the change in the number of shares of common stock outstanding during fiscal years ended March 31, 2023, 2024 and 2025, respectively:
 
Shares outstanding as of March 31, 2022
40,986,658 
Purchase of treasury stock(358,365)
Shares issued towards equity-based compensation plans, net of equity awards surrendered for option price and taxes272,766 
Shares outstanding as of March 31, 2023
40,901,059 
Purchase of treasury stock(1,002,415)
Shares issued under equity-based compensation plans, net of equity awards surrendered for option price and taxes373,292 
Shares outstanding as of March 31, 2024
40,271,936 
Purchase of treasury stock(1,568,292)
Shares issued under equity-based compensation plans, net of equity awards surrendered for option price and taxes488,417 
Shares outstanding as of March 31, 2025
39,192,061 
Treasury Stock

In fiscal 2025, the Company purchased 1,568,292 shares for $153,961. The Company purchased 1,002,415 shares for $95,690 in fiscal 2024 and 358,365 shares for $22,907 in fiscal 2023. At March 31, 2025 and 2024, the Company held 17,647,529 and 16,091,988 shares as treasury stock, respectively.

Treasury Stock Reissuance

During fiscal 2025, fiscal 2024 and fiscal 2023, the Company also issued 12,751, 13,981 and 17,077 shares out of its treasury stock, respectively, valued at $62.55 per share, on a FIFO basis, to participants under the Company's Employee Stock Purchase Plan.

Accumulated Other Comprehensive Income (“AOCI”)

The components of AOCI, net of tax, are as follows:
 
Beginning
Balance
Before ReclassificationsAmount Reclassified from AOCIEnding
Balance
March 31, 2025
Pension funded status adjustment$(9,798)$132 $(708)$(10,374)
Net unrealized gain (loss) on derivative instruments755 (2,339)1,315 (269)
Foreign currency translation adjustment (1)
(195,808)(41,028)— (236,836)
Accumulated other comprehensive loss$(204,851)$(43,235)$607 $(247,479)
March 31, 2024
Pension funded status adjustment$(4,423)$(5,672)$297 $(9,798)
Net unrealized gain (loss) on derivative instruments1,411 6,283 (6,939)755 
Foreign currency translation adjustment (1)
(180,462)(15,346)— (195,808)
Accumulated other comprehensive loss$(183,474)$(14,735)$(6,642)$(204,851)
March 31, 2023
Pension funded status adjustment$(12,637)$7,872 $342 $(4,423)
Net unrealized gain (loss) on derivative instruments2,963 (2,453)901 1,411 
Foreign currency translation adjustment (1)
(133,821)(46,641)— (180,462)
Accumulated other comprehensive loss$(143,495)$(41,222)$1,243 $(183,474)
(1) Foreign currency translation adjustment for the fiscal year ended March 31, 2025, March 31, 2024, March 31, 2023 and includes a $10,600 gain (net of taxes of $3,235), $2,615 loss (net of taxes of $797) and 19,491 gain (net of taxes 4,557), respectively, related to the Company's cross-currency fixed interest rate swap contracts.

The following table presents reclassifications from AOCI during the twelve months ended March 31, 2025:
Components of AOCI Amounts Reclassified from AOCILocation of (Gain) Loss Recognized on Income Statement
Derivatives in Cash Flow Hedging Relationships:
Net unrealized loss on derivative instruments$1,717 Cost of goods sold
Tax benefit(402)
Net unrealized loss on derivative instruments, net of tax$1,315 
Derivatives in net investment hedging relationships:
Net unrealized gain on derivative instruments$(4,413)Interest expense
Tax expense1,032 
Net unrealized gain on derivative instruments, net of tax$(3,381)
Defined benefit pension costs:
Prior service costs, deferrals, and settlements$(1,027)Net periodic benefit cost, included in other (income) expense, net - See Note 16
Tax expense319 
Net periodic benefit cost, net of tax$(708)




The following table presents reclassifications from AOCI during the twelve months ended March 31, 2024:

Components of AOCI Amounts Reclassified from AOCILocation of (Gain) Loss Recognized on Income Statement
Derivatives in Cash Flow Hedging Relationships:
Net unrealized gain on derivative instruments$(9,057)Cost of goods sold
Tax benefit2,118 
Net unrealized gain on derivative instruments, net of tax$(6,939)
Derivatives in net investment hedging relationships:
Net unrealized gain on derivative instruments$(713)Interest expense
Tax expense167 
Net unrealized gain on derivative instruments, net of tax$(546)
Defined benefit pension costs:
Prior service costs and deferrals$326 Net periodic benefit cost, included in other (income) expense, net - See Note 16
Tax benefit(29)
Net periodic benefit cost, net of tax$297 

The following table presents reclassifications from AOCI during the twelve months ended March 31, 2023:
Components of AOCIAmounts Reclassified from AOCILocation of (Gain) Loss Recognized on Income Statement
Derivatives in Cash Flow Hedging Relationships:
Net unrealized loss on derivative instruments$1,176 Cost of goods sold
Tax benefit(275)
Net unrealized loss on derivative instruments, net of tax$901 
Derivatives in net investment hedging relationships:
Net unrealized gain on derivative instruments$(3,587)Interest expense
Tax expense839 
Net unrealized gain on derivative instruments, net of tax$(2,748)
Defined benefit pension costs:
Prior service costs and deferrals$478 Net periodic benefit cost, included in other (income) expense, net - See Note 16
Tax benefit(136)
Net periodic benefit cost, net of tax$342 
v3.25.1
Stock-Based Compensation
12 Months Ended
Mar. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation Stock-Based Compensation
As of March 31, 2025, the Company maintains the 2023 Equity Incentive Plan (“2023 EIP”). The 2023 EIP reserved 3,614,500 shares of common stock for the grant of various classes of nonqualified stock options, restricted stock units, market condition-based on total shareholder return (“TSR”) and performance condition-based share units (“PSU”) and other forms of equity-based compensation. Shares subject to any awards that expire without being exercised or that are forfeited or settled in cash shall again be available for future grants of awards under the 2023 EIP. Shares subject to stock option or stock appreciation right awards, that have been retained by the Company in payment or satisfaction of the exercise price and any applicable tax withholding obligation of such awards, shall not be available for future grant under the 2023 EIP.

As of March 31, 2025, 2,837,222 shares are available for future grants. The Company’s equity incentive plans are intended to provide an incentive to employees and non-employee directors of the Company to remain in the service of the Company and to increase their interest in the success of the Company in order to promote the long-term interests of the Company. The plans seek to promote the highest level of performance by providing an economic interest in the long-term performance of the Company. The Company settles employee share-based compensation awards with newly issued shares.

Stock Options

During fiscal 2025, the Company granted to management and other key employees 266,027 non-qualified options that vest ratably over 3 years from the date of grant. Options expire 10 years from the date of grant.

The Company recognized stock-based compensation expense relating to stock options of $5,869, with a related tax benefit of $1,161 for fiscal 2025, $7,022 with a related tax benefit of $730 for fiscal 2024 and $6,232 with a related tax benefit of $848 for fiscal 2023.
For purposes of determining the fair value of stock options granted, the Company used a Black-Scholes Model with the following assumptions:

202520242023
Risk-free interest rate3.84 %4.24 %2.92 %
Dividend yield1.02 %0.95 %0.99 %
Expected life (years)666
Volatility38.61 %38.25 %37.40 %

The following table summarizes the Company’s stock option activity in the years indicated:
 
Number of
Options
Weighted-
Average
Remaining
Contract
Term (Years)
Weighted-
Average
Exercise
Price
Aggregate
Intrinsic
Value
Options outstanding as of March 31, 2022975,605 7.5$78.94 $3,605 
Granted310,140 75.33 — 
Exercised(75,180)65.22 1,561 
Forfeited(9,575)80.05 39 
Expired(4,679)85.12 — 
Options outstanding as of March 31, 20231,196,311 7.3$78.83 $12,150 
Granted200,314 101.04 — 
Exercised(197,350)71.81 6,110 
Forfeited(9,166)78.68 158 
Expired— — — 
Options outstanding as of March 31, 20241,190,109 7.0$83.74 $15,043 
Granted266,027 101.56 — 
Exercised(139,016)76.66 3,950 
Forfeited(29,340)98.38 115 
Expired— — — 
Options outstanding as of March 31, 20251,287,780 6.8$87.85 $10,472 
Options exercisable as of March 31, 2025818,637 5.7$83.13 $8,951 
Options vested and expected to vest, as of March 31, 20251,269,049 6.8$87.68 $10,455 


The following table summarizes information regarding stock options outstanding as of March 31, 2025:
Range of Exercise PricesNumber of
Options
Weighted-
Average
Remaining
Contractual Life (Years)
Weighted-
Average
Exercise Price
$57.60-$60.0090,520 4.0$57.73 
$70.01-$80.00378,411 6.4$75.71 
$80.01-$90.00159,380 4.2$83.01 
$90.01-$100.00209,579 8.1$93.60 
$100.01-$109.69449,890 8.1$103.24 
1,287,780 6.8$87.85 
 
Restricted Stock Units, Market and Performance-condition based Awards

Non-Employee Directors
In fiscal 2025, the Company granted to non-employee directors 19,214 deferred restricted stock units (“DSU”) at the fair value of $76.52 per unit at the date of grant. In fiscal 2024, such grants amounted to 21,147 DSU's at the fair value of $76.83 per unit at the date of grant and in fiscal 2023, such grants amounted to 39,792 DSU's units at the fair value of $42.95 unit at the date of grant. The awards vest immediately upon the date of grant and are settled in shares of common stock six months after termination of service as a director.

The Company also granted to non-employee directors, during fiscal 2025, fiscal 2024 and fiscal 2023, 9,972, 8,386, and 1,635 restricted stock units, respectively, at fair values of $98.62, $94.34 and $66.90, respectively, under the deferred compensation plan for non-employee directors.

Employees

In fiscal 2025, the Company granted to management and other key employees 361,222 restricted stock units that vest ratably over four years from the date of grant, at the fair value of $94.63 per restricted stock unit.

In fiscal 2024, the Company granted to management and other key employees 269,751 restricted stock units that vest ratably over four years from the date of grant at the fair value of $94.31 per restricted stock unit.

In fiscal 2023, the Company granted to management and other key employees 345,449 restricted stock units that vest ratably over four years from the date of grant at a fair value of $70.88 per restricted stock unit.

A summary of the changes in restricted stock units, including DSU's, and TSRs awarded to employees and directors that were outstanding under the Company’s equity compensation plans during fiscal 2025 is presented below:

 Restricted Stock Units  (RSU)Market condition-based Share Units (TSR)
 Number of
RSU
Weighted-
Average
Grant Date
Fair Value
Number of
TSR
Weighted-
Average
Grant Date
Fair Value
Non-vested awards as of March 31, 20241,022,836 $69.24 1,132 $66.89 
Granted361,222 94.63 — — 
Stock dividend9,685 75.49 11 66.89 
Performance factor— — — — 
Vested(435,043)64.39 — — 
Forfeitures(38,993)86.69 — — 
Non-vested awards as of March 31, 2025919,707 $80.42 1,143 $66.89 

The Company recognized stock-based compensation expense relating to restricted stock units of $21,867, with a related tax benefit of $3,520 for fiscal 2025, $23,585, with a related tax benefit of $4,557 for fiscal 2024 and $20,139, with a related tax benefit of $3,746 for fiscal 2023.

All Award Plans

As of March 31, 2025, unrecognized compensation expense associated with the non-vested equity awards outstanding was $64,214 and is expected to be recognized over a weighted-average period of 27 months.
v3.25.1
Earnings Per Share
12 Months Ended
Mar. 31, 2025
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per 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,
 202520242023
Net earnings attributable to EnerSys stockholders$363,735 $269,096 $175,810 
Weighted-average number of common shares outstanding:
Basic39,760,829 40,669,392 40,809,235 
Dilutive effect of:
Common shares from exercise and lapse of equity awards, net of shares assumed reacquired677,750 702,047 517,520 
Diluted weighted-average number of common shares outstanding40,438,579 41,371,439 41,326,755 
Basic earnings per common share attributable to EnerSys stockholders$9.15 $6.62 $4.31 
Diluted earnings per common share attributable to EnerSys stockholders$8.99 $6.50 $4.25 
Anti-dilutive equity awards not included in diluted weighted-average common shares551,411 356,893 710,678 
v3.25.1
Commitments, Contingencies and Litigation
12 Months Ended
Mar. 31, 2025
Commitments and Contingencies Disclosure [Abstract]  
Commitments, Contingencies and Litigation Commitments, Contingencies and Litigation
Litigation and Other Legal Matters

In the ordinary course of business, the Company and its subsidiaries are routinely defendants in or parties to pending and threatened legal actions and proceedings, including actions brought on behalf of various classes of claimants. These actions and proceedings are generally based on alleged violations of environmental, anti-competition, employment, contract and other laws. In some of these actions and proceedings, claims for substantial monetary damages are asserted against the Company and its subsidiaries. In the ordinary course of business, the Company and its subsidiaries are also subject to regulatory and governmental examinations, information gathering requests, inquiries, investigations, and threatened legal actions and proceedings. In connection with formal and informal inquiries by federal, state, local and foreign agencies, the Company and its subsidiaries receive numerous requests, subpoenas and orders for documents, testimony and information in connection with various aspects of their activities.

European Competition Investigations

Certain of the Company’s European subsidiaries had received subpoenas and requests for documents and, in some cases, interviews from, and have had on-site inspections conducted by the competition authorities of Belgium, Germany and the Netherlands relating to conduct and anticompetitive practices of certain industrial battery participants. As of March 31, 2025 and March 31, 2024, the Company did not have a reserve balance related to these matters.

The precise scope, timing and time period at issue, as well as the final outcome of the investigations or customer claims, remain uncertain. Accordingly, the Company’s estimate may change from time to time, and actual losses could vary.

Environmental Issues

As a result of its operations, the Company is subject to various federal, state and local, as well as international environmental laws and regulations and is exposed to the costs and risks of registering, handling, processing, storing, transporting, and disposing of hazardous substances, especially lead and acid. The Company’s operations are also subject to federal, state, local and international occupational safety and health regulations, including laws and regulations relating to exposure to lead in the workplace. The Company believes that it has adequate reserves to satisfy its environmental liabilities.
Collective Bargaining

At March 31, 2025, the Company had approximately 10,858 employees. Of these employees, approximately 28% were covered by collective bargaining agreements. Employees covered by collective bargaining agreements that expire in the next twelve months were approximately 8% of the total workforce. The average term of these agreements is 2 years, with the longest term being 4 years. The Company considers its employee relations to be good and did not experience any significant labor unrest or disruption of production during fiscal 2025.

Lead, Foreign Currency Forward Contracts and Swaps

To stabilize its lead costs and reduce volatility from currency movements, the Company enters into contracts with financial institutions. The vast majority of such contracts are for a period not extending beyond one year. The Company also entered into cross currency fixed interest rate swap agreements to hedge its net investments in foreign operations against future volatility in the exchange rates between U.S. Dollars and Euros and these agreements mature on December 15, 2027. Please refer to Note 14 - Derivative Financial Instruments for more details.

Other

The Company has various purchase and capital commitments incidental to the ordinary conduct of business. In the aggregate, such commitments are not at prices in excess of current market.
v3.25.1
Restructuring Plans and Other Exit Charges
12 Months Ended
Mar. 31, 2025
Restructuring and Related Activities [Abstract]  
Restructuring, Exit and Other Charges Restructuring, Exit and Other Charges
Restructuring Programs

The Company had committed to various restructuring plans aimed at improving operational efficiencies across its lines of business. All of these plans are complete. Restructuring and exit charges for the reportable segments are as follows:

During fiscal 2025, the Company announced and completed restructuring programs in all reportable segments to improve operational efficiencies. The charges related to Energy Systems severance payments amounted to $3,364 to approximately 160 employees. The charges related to Motive Power severance payments amounted to $1,492 to approximately 66 employees.The charges related to Specialty severance payments amounted to $397 to approximately 4 employees.

During fiscal 2024, the Company recorded charges related to our fiscal 2024 and fiscal 2023 programs in the Energy Systems and Motive Power segments to improve operational efficiencies. The charges related to severance payments and amounted to $4,468 to approximately 146 employees in the Energy Systems’ segment and $2,713 to approximately 37 employees in the Motive Power segment.

During fiscal 2023, the Company recorded charges related to our fiscal 2022 programs in the Energy Systems segment to improve operational efficiencies. The charges related to severance payments and amounted to $1,230 to approximately 9 employees in the Energy Systems’ segment.
Restructuring and exit charges for fiscal 2025, 2024 and 2023 by reportable segments are as follows:

 Fiscal year ended March 31, 2025
Energy SystemsMotive PowerSpecialtyTotal
Restructuring charges$5,001 $1,575 $398 $6,974 
Exit charges993 4,144 2,317 7,454 
Restructuring and other exit charges$5,994 $5,719 $2,715 $14,428 

Fiscal year ended March 31, 2024
Energy SystemsMotive PowerSpecialtyTotal
Restructuring charges$4,526 $3,445 $35 $8,006 
Exit charges4,312 8,253 7,532 20,097 
Restructuring and other exit charges$8,838 $11,698 $7,567 $28,103 

Fiscal year ended March 31, 2023
Energy SystemsMotive PowerSpecialtyTotal
Restructuring charges$1,318 $327 $42 $1,687 
Exit charges123 12,537 2,092 14,752 
Restructuring and other exit charges$1,441 $12,864 $2,134 $16,439 

A roll-forward of the restructuring reserve is as follows:
 
Balance at March 31, 2022
$1,030 
Accrued1,687 
Costs incurred(2,224)
Foreign currency impact and other(48)
Balance at March 31, 2023
$445 
Accrued8,006 
Costs incurred(6,064)
Foreign currency impact and other21 
Balance at March 31, 2024
$2,408 
Accrued6,974 
Costs incurred(8,292)
Foreign currency impact and other(11)
Balance at March 31, 2025
$1,079 

Exit Charges

Fiscal 2024 Programs

Renewables

On November 8, 2023, the Company's Board of Directors approved a plan to stop production and operations of residential renewable energy products, which include our OutBack and Mojave brands. Management determined that residential renewable energy products no longer fit with the Company’s core strategy and resources will be better allocated toward commercial energy solutions for enterprise customers. The Company estimates that the total charges for these actions will amount to approximately $24,500. Non-cash charges for inventory and fixed assets write offs, and impairment of an indefinite-lived intangible asset are estimated to be $23,600, and cash charges for employee severance and retention payments are estimated to be $900. The plan was completed as the end of fiscal 2025.
During fiscal 2024, the Company recorded non-cash charges totaling $551 primarily related to fixed assets and cash charges of $689 related to severance costs. The Company also recorded a non-cash write offs relating to inventories of $17,075, which was reported in cost of goods sold, and impairment of indefinite-lived intangible asset of $6,020.

During fiscal 2025, the Company recorded non-cash charges totaling $333 related to fixed asset write offs and inventories of $275.

Spokane

On November 8, 2023, the Company committed to a plan to close its facility in Spokane, Washington, which primarily manufactures enclosure systems for telecommunications and related end markets. Management determined that existing manufacturing locations have the capacity to satisfy demand for these products and will execute more efficient distribution to customers. The Company currently estimates that the total charges for these actions will amount to approximately $3,600 relating to $1,400 in cash charges for employee severance, and non-cash charges of $2,200 relating to fixed assets, facility lease, and inventory.

During fiscal 2024, the Company recorded cash charges of $1,343 primarily related to severance costs and non-cash charges totaling $2,066 related to lease right of use asset and fixed asset write offs.

During fiscal 2025, the Company recorded cash charges of $669 primarily related to manufacturing variances.

Fiscal 2023 Programs

Sylmar

In November 2022, the Company committed to a plan to close its facility in Sylmar, California, which manufactures specialty lithium batteries for aerospace and medical applications. Management determined to close the site upon the expiration of its lease on the property and to redirect production through consolidation into existing locations. The Company currently estimates total charges in the exit to amount to $13,661. Cash charges are estimated to total $9,769 primarily relating to severance and other costs to leave the site. Non-cash charges are estimated to be $3,892 relating to fixed assets, inventory, and contract assets. The plan was substantially complete as the end of fiscal 2024.

During fiscal 2023, the Company recorded cash charges of $1,682 related primarily related to severance costs and non-cash charges totaling $417 primarily relating to contract assets.

During fiscal 2024, the Company recorded cash charges of $7,155 primarily related to severance costs, relocation expenses, and manufacturing variances and non-cash charges totaling $377. The Company also recorded a non-cash write off relating to inventories of $3,098, which was reported in cost of goods sold.

During fiscal 2025, The Company recorded cash charges of $931 primarily related to relocation costs.

Ooltewah

On June 29, 2022, the Company committed to a plan to close its facility in Ooltewah, Tennessee, which produced flooded motive power batteries for electric forklifts. Management determined that future demand for traditional motive power flooded cells will decrease as customers transition to maintenance free product solutions in lithium and TPPL. The Company currently estimates that the total charges for these actions will amount to approximately $18,500. Cash charges for employee severance related payments, cleanup related to the facility, contractual releases and legal expenses are estimated to be $9,200 and non-cash charges from inventory and fixed asset write-offs are estimated to be $9,300. These actions will result in the reduction of approximately 165 employees. The majority of these charges were recorded by the end of fiscal 2024.

During fiscal 2023, the Company recorded cash charges relating to severance and manufacturing variances of $2,735 and non-cash charges of $7,261 relating to fixed asset write-offs. The Company also recorded a non-cash write off relating to inventories of $1,613, which was reported in cost of goods sold.

During fiscal 2024, the Company recorded cash charges relating to site cleanup and decommissioning equipment of $4,399.

During fiscal 2025, the Company recorded $474 cash charges relating to site cleanup.

Fiscal 2021 Programs
Hagen, Germany

In fiscal 2021, the Company's Board of Directors approved a plan to substantially close all of its facility in Hagen, Germany, which produces flooded motive power batteries for forklifts. Management determined that future demand for the motive power batteries produced at this facility was not sufficient, given the conversion from flooded to maintenance free batteries by customers, the existing number of competitors in the market, as well as the near term decline in demand and increased
uncertainty from the pandemic. The Company plans to retain the facility with limited sales, service and administrative functions along with related personnel for the foreseeable future.

The Company currently estimates that the total charges for these actions will amount to approximately $60,000, the majority of which has been recorded as of March 31, 2022. Cash charges for employee severance related payments, cleanup related to the facility, contractual releases and legal expenses are estimated to be $40,000 and non-cash charges from inventory and equipment write-offs are estimated to be $20,000. These actions resulted in the reduction of approximately 200 employees.

During fiscal 2021, the Company recorded cash charges relating to severance of $23,331 and non-cash charges of $7,946 primarily relating to fixed asset write-offs.

During fiscal 2022, the Company recorded cash charges primarily relating to severance of $8,069 and non-cash charges of $3,522 primarily relating to fixed asset write-offs. The Company also recorded a non-cash write off relating to inventories of $960, which was reported in cost of goods sold.

During fiscal 2023, the Company recorded cash charges of $2,207 relating to primarily to site cleanup and $562 of non-cash charges relating to accelerated depreciation of fixed assets.

During fiscal 2024, the Company recorded cash charges of $2,118 relating primarily to site cleanup and $526 of non-cash charges relating to accelerated depreciation of fixed assets.

During fiscal 2025, the Company recorded cash charges of $3,625 relating primarily to site cleanup and $598 of non-cash charges relating to accelerated depreciation of fixed assets.
v3.25.1
Warranty
12 Months Ended
Mar. 31, 2025
Guarantees [Abstract]  
Warranty Warranty
The Company provides for estimated product warranty expenses when products are sold, with related liabilities included within accrued expenses and other liabilities. As warranty estimates are forecasts that are based on the best available information, primarily historical claims experience, costs of claims may ultimately differ from amounts provided. An analysis of changes in the liability for product warranties is as follows:
 Fiscal year ended March 31,
 202520242023
Balance at beginning of year$60,819 $56,630 $54,978 
Current year provisions32,400 34,110 29,132 
Costs incurred(27,867)(30,160)(25,251)
Foreign currency translation adjustment1,069 239 (2,229)
Balance at end of year$66,421 $60,819 $56,630 
v3.25.1
Other (Income) Expense, Net
12 Months Ended
Mar. 31, 2025
Other Income and Expenses [Abstract]  
Other (Income) Expense, Net Other (Income) Expense, Net
Other (income) expense, net consists of the following:
 Fiscal year ended March 31,
 202520242023
Cost of Funds Asset Securitization$8,672 $8,776 $2,314 
Non-service components of pension expense(1,259)1,530 315 
Foreign exchange transaction (gains) losses (3,324)(6,053)671 
Other2,904 5,178 4,893 
Total$6,993 $9,431 $8,193 
v3.25.1
Business Segments
12 Months Ended
Mar. 31, 2025
Segment Reporting [Abstract]  
Business Segments Business Segments
The Company's chief operating decision maker, or CODM (the Company's Chief Executive Officer), reviews financial information for purposes of assessing business performance and allocating resources, by focusing on the lines of business on a global basis. The Company identifies the following as its four operating segments, based on lines of business:

Energy Systems - uninterruptible power systems, or “UPS” applications for computer and computer-controlled systems, as well as telecommunications systems, switchgear and electrical control systems used in industrial facilities and electric utilities, large-scale energy storage and energy pipelines. Energy Systems also includes highly integrated power solutions and services to broadband, telecom, data center, and industrial customers, as well as thermally managed cabinets and enclosures for electronic equipment and batteries.
Motive Power - power for electric industrial forklifts, AGVs other material handling equipment used in manufacturing, and warehousing operations, as well as equipment used in floor care, mining, rail and airport ground support applications.
Specialty - premium starting, lighting and ignition applications in transportation, energy solutions for satellites, spacecraft, commercial aircraft, military, aircraft, submarines, ships, other tactical vehicles, defense applications and portable power solutions for soldiers in the field, as well as medical devices and equipment.
New Ventures - energy storage and management systems for demand charge reduction, utility back-up power, and dynamic fast charging for electric vehicles.

The operating segments of Energy Systems, Motive Power, and Specialty also represent the Company's reportable segments under ASC 280, Segment Reporting. The results of New Ventures include start-up and operating expenses captured within the "Corporate and other" category of operating earnings.

Summarized financial information related to the Company’s reportable segments at March 31, 2025, 2024 and 2023 and for each of the fiscal years then ended is shown below.
Twelve months ended
March 31, 2025
Energy SystemsMotive PowerSpecialtyTotal
Net Sales by segment to unaffiliated customers$1,531,169 $1,484,117 $593,488 $3,608,774 
Net sales from corporate and other 8,805 
Total Net Sales$3,617,579 
Less:
Other segment items(4)
$1,427,963 $1,251,362 $556,534 $3,244,664 
Segment income$103,206 $232,755 $36,954 $372,915 
Less:
Inventory adjustment relating to exit activities274 — 3,335 3,609 
Restructuring and other exit charges 5,994 5,719 2,715 14,428 
Loss on assets held for sale— 4,634 — 4,634 
Amortization of intangible assets23,620 685 7,500 31,805 
Acquisition expense11 11 2,476 2,498 
Integration costs (96)— 4,086 3,990 
Other673 1,574 110 2,357 
Total operating earnings by segment$72,730 $220,132 $16,732 $309,594 
Corporate and other(3)
$155,092 
Operating earnings(2)
$464,686 
(1)Reportable segments do not record inter-segment revenues and accordingly there are none to report.
(2)The Company does not allocate interest expense or other (income) expense, net, to the reportable segments.
(3)     Corporate and other includes amounts managed on a company-wide basis and not directly allocated to any reportable segments, primarily relating to IRA production tax credits. Also, included are start-up costs for exploration of a new lithium plant as well as start-up operating expenses from the New Ventures operating segment.
(4) Primarily includes cost of sales and operating expenses

Twelve months ended
March 31, 2024
Energy SystemsMotive PowerSpecialtyTotal
Net Sales by segment to unaffiliated customers$1,590,023 $1,456,181 $535,667 $3,581,871 
Net sales from corporate and other — 
Total Net Sales$3,581,871 
Less:
Other segment items(4)
$1,503,068 $1,241,531 $504,301 $3,248,900 
Segment income$86,955 $214,650 $31,366 $332,971 
Less:
Inventory adjustment relating to exit activities17,075 — 3,098 20,173 
Restructuring and other exit charges 8,840 11,697 7,566 28,103 
Impairment of indefinite-lived intangibles13,619 — — 13,619 
Legal proceedings charge, net3,705 — — 3,705 
Amortization of intangible assets24,503 683 2,808 27,994 
Acquisition expense16 185 — 201 
Integration costs 420 — — 420 
Other3,304 847 295 4,446 
Total operating earnings by segment$15,473 $201,238 $17,599 $234,310 
Corporate and other(3)
$117,260 
Operating earnings(2)
$351,570 
(1)Reportable segments do not record inter-segment revenues and accordingly there are none to report.
(2)The Company does not allocate interest expense or other (income) expense, net, to the reportable segments.
(3)     Corporate and other includes amounts managed on a company-wide basis and not directly allocated to any reportable segments, primarily relating to IRA production tax credits. Also, included are start-up costs for exploration of a new lithium plant as well as start-up operating expenses from the New Ventures operating segment.
(4) Primarily includes cost of sales and operating expenses

Twelve months ended
March 31, 2023
Energy SystemsMotive PowerSpecialtyTotal
Net Sales by segment to unaffiliated customers$1,738,195 $1,451,244 $519,140 $3,708,579 
Net sales from corporate and other — 
Total Net Sales$3,708,579 
Less:
Other segment items(4)
$1,647,795 $1,271,272 $478,653 $3,397,720 
Segment income$90,400 $179,972 $40,487 $310,859 
Less:
Inventory adjustment relating to exit activities(211)892 — 681 
Restructuring and other exit charges 1,441 12,864 2,134 16,439 
Impairment of indefinite-lived intangibles100 — 380 480 
Amortization of intangible assets27,383 441 2,923 30,747 
Acquisition expense87 317 — 404 
Integration costs 138 — — 138 
Other487 310 95 892 
Total operating earnings by segment$60,975 $165,148 $34,955 $261,078 
Corporate and other(3)
$17,283 
Operating earnings(2)
$278,361 
(1)Reportable segments do not record inter-segment revenues and accordingly there are none to report.
(2)The Company does not allocate interest expense or other (income) expense, net, to the reportable segments.
(3)     Corporate and other includes amounts managed on a company-wide basis and not directly allocated to any reportable segments, primarily relating to IRA production tax credits. Also, included are start-up costs for exploration of a new lithium plant as well as start-up operating expenses from the New Ventures operating segment.
(4) Primarily includes cost of sales and operating expenses
Fiscal year ended March 31,
202520242023
Capital Expenditures
Energy Systems$39,167 $33,626 $37,249 
Motive Power22,758 17,115 16,373 
Specialty47,016 35,596 35,150 
Other12,097 100 — 
Total$121,038 $86,437 $88,772 
Depreciation and Amortization
Energy Systems$50,443 $49,469 $52,034 
Motive Power23,695 23,690 22,404 
Specialty26,706 18,762 16,715 
Other32 100 — 
Total$100,876 $92,021 $91,153 
The Company's property, plant and equipment by reportable segments as of March 31, 2025 and 2024 are as follows:

March 31, 2025March 31, 2024
Property, plant and equipment, net
Energy Systems$198,841 $189,519 
Motive Power144,076 145,395 
Specialty236,861 197,368 
Other 12,655 168 
Total$592,433 $532,450 
The Company markets its products and services in over 100 countries. Sales are attributed to countries based on the location of sales order approval and acceptance. Sales to customers in the United States were 63.5%, 60.2% and 63.4% for fiscal years ended March 31, 2025, 2024 and 2023, respectively. Property, plant and equipment, net, attributable to the United States as of March 31, 2025 and 2024, were $422,263 and $357,416, respectively. No single country, outside the United States, accounted for more than 10% of the consolidated net sales or net property, plant and equipment and, therefore, was deemed not material for separate disclosure.
v3.25.1
Subsequent Events
12 Months Ended
Mar. 31, 2025
Subsequent Events [Abstract]  
Subsequent Events Subsequent Events
Dividend

On May 21, 2025, the Board of Directors approved a quarterly cash dividend of $0.24 per share of common stock to be paid on June 27, 2025, to stockholders of record as of June 13, 2025.
v3.25.1
Pay vs Performance Disclosure - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Pay vs Performance Disclosure      
Net earnings attributable to EnerSys stockholders $ 363,735 $ 269,096 $ 175,810
v3.25.1
Insider Trading Arrangements
3 Months Ended
Mar. 31, 2025
Trading Arrangements, by Individual  
Rule 10b5-1 Arrangement Adopted false
Non-Rule 10b5-1 Arrangement Adopted false
Rule 10b5-1 Arrangement Terminated false
Non-Rule 10b5-1 Arrangement Terminated false
v3.25.1
Insider Trading Policies and Procedures
12 Months Ended
Mar. 31, 2025
Insider Trading Policies and Procedures [Line Items]  
Insider Trading Policies and Procedures Adopted true
v3.25.1
Cybersecurity Risk Management and Strategy Disclosure
12 Months Ended
Mar. 31, 2025
Cybersecurity Risk Management, Strategy, and Governance [Line Items]  
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]
Our cyber risk management program is designed to comprehensively address the spectrum of cybersecurity threats that confront our organization. Within this program, we integrate an analysis of the risks facing the organization to guide our preparedness against cybersecurity threats to ensure a holistic approach that encompasses cross-functional and geographical visibility under the oversight of executive leadership through regular risk management meetings.

To aid our cybersecurity risk management strategy, we contract with dedicated third-party firms and assessors to identify risks and threats to our organization. These assessments adhere to leading cybersecurity standards such as the National Institute of Standards and Technology (NIST) Cybersecurity Framework aligning with industry best practices. Additionally, our organization adheres to compliance with the Cybersecurity Maturity Model Certification (CMMC) and is undergoing International Organization for Standardization (ISO) accreditation, further demonstrating our commitment to adhering to rigorous cybersecurity standards. To oversee incident response and mitigation we utilize our incident response plan and processes to standardize our processes for assessing, identifying, and managing cybersecurity incidents. This includes a comprehensive reporting structure and analysis processes to provide visibility and determine incident business impact. Were a cybersecurity incident to occur, we have also implemented a cross-functional business team to aid in the determination of incident impact, severity, and materiality, with the support of standing external counsel and third-party incident response advisors. Additional to our third-party incident response advisors and support contracts, we undergo regular penetration tests to bolster our readiness in the event of cybersecurity incidents. Furthermore, we have also obtained cybersecurity insurance coverage to enhance protection and minimize potential financial losses arising from cyber threats.

We prioritize cybersecurity within our supply chain, both nationally and globally, by assessing our third-party cybersecurity posture to provide secure visibility with our partnerships. As part of our due diligence processes, we conduct security questionnaires and service provider reviews, to align our cybersecurity standards on the onset of our partnerships. Additionally, we collaborate closely with a third-party vendor to enhance supply chain resilience. This collaboration involves leveraging their expertise to inform decision-making and enhance risk oversight processes, ensuring greater robustness, and adaptability in managing supply chain challenges.

While we maintain a strong cybersecurity posture, we continuously strive for improvement and vigilance to mitigate evolving threats within this dynamic environment and protect our stakeholders’ interests. Our organization has not experienced any unauthorized access resulting from cybersecurity incidents with a materially adverse effect on our business, operations, or financial condition and we remain cognizant of the potential impact of insufficient cybersecurity measures on our operations. For further insights into additional organizational risks, please refer to the General Risk Factors section of Item 1(A) Risk Factors.
Cybersecurity Risk Management Processes Integrated [Flag] true
Cybersecurity Risk Management Processes Integrated [Text Block]
Our cyber risk management program is designed to comprehensively address the spectrum of cybersecurity threats that confront our organization. Within this program, we integrate an analysis of the risks facing the organization to guide our preparedness against cybersecurity threats to ensure a holistic approach that encompasses cross-functional and geographical visibility under the oversight of executive leadership through regular risk management meetings.
Cybersecurity Risk Management Third Party Engaged [Flag] true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] false
Cybersecurity Risk Board of Directors Oversight [Text Block]
The Board delegated primary oversight authority to the Audit Committee who plays a pivotal role in ensuring the effectiveness of our cybersecurity strategy. Through regular updates provided by our leadership team, the committee actively evaluates the organization's cybersecurity posture and aids in prioritizing risk mitigation efforts aligned with our strategic objectives. These updates encompass detailed quarterly reports during audit committee meetings, covering key metrics, ongoing initiatives, and any cybersecurity incidents. Additionally, on an annual basis, the entire board receives updates on the progress of our cybersecurity program and strategy, including insights into emerging risks and industry trends. Moreover, the board benefits from supplementary educational briefings delivered by both internal and external experts, providing invaluable global threat visibility and enhancing the Board's understanding of cybersecurity challenges and opportunities.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block] Overseeing our cybersecurity initiatives is our CIO and Director of Global Cybersecurity, who provide invaluable expertise in managing cybersecurity risks and leading our cybersecurity operations.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block] These updates encompass detailed quarterly reports during audit committee meetings, covering key metrics, ongoing initiatives, and any cybersecurity incidents. Additionally, on an annual basis, the entire board receives updates on the progress of our cybersecurity program and strategy, including insights into emerging risks and industry trends. Moreover, the board benefits from supplementary educational briefings delivered by both internal and external experts, providing invaluable global threat visibility and enhancing the Board's understanding of cybersecurity challenges and opportunities.
Cybersecurity Risk Role of Management [Text Block]
The Board delegated primary oversight authority to the Audit Committee who plays a pivotal role in ensuring the effectiveness of our cybersecurity strategy. Through regular updates provided by our leadership team, the committee actively evaluates the organization's cybersecurity posture and aids in prioritizing risk mitigation efforts aligned with our strategic objectives. These updates encompass detailed quarterly reports during audit committee meetings, covering key metrics, ongoing initiatives, and any cybersecurity incidents. Additionally, on an annual basis, the entire board receives updates on the progress of our cybersecurity program and strategy, including insights into emerging risks and industry trends. Moreover, the board benefits from supplementary educational briefings delivered by both internal and external experts, providing invaluable global threat visibility and enhancing the Board's understanding of cybersecurity challenges and opportunities.

Overseeing our cybersecurity initiatives is our CIO and Director of Global Cybersecurity, who provide invaluable expertise in managing cybersecurity risks and leading our cybersecurity operations. Both the CIO and Director of Global Cybersecurity possess extensive expertise in information technology and program management, with a wealth of experience, including over 19 combined years of dedicated service within our corporate information security organization. Furthermore, the executive leadership team is active in security operations, overseeing implementation of policies, procedures, and policies related to cybersecurity, technology, and vendors. Both the Audit Committee of the Board as well as executive leadership team will be notified and updated in the event of an incident, with incident updates, mitigation efforts, and impact, as deemed appropriate.
Cybersecurity Risk Management Positions or Committees Responsible [Flag] true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block] Overseeing our cybersecurity initiatives is our CIO and Director of Global Cybersecurity, who provide invaluable expertise in managing cybersecurity risks and leading our cybersecurity operations.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block] Both the CIO and Director of Global Cybersecurity possess extensive expertise in information technology and program management, with a wealth of experience, including over 19 combined years of dedicated service within our corporate information security organization.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block] Both the Audit Committee of the Board as well as executive leadership team will be notified and updated in the event of an incident, with incident updates, mitigation efforts, and impact, as deemed appropriate.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] true
v3.25.1
Summary of Significant Accounting Policies (Policies)
12 Months Ended
Mar. 31, 2025
Accounting Policies [Abstract]  
Description of Business
Description of Business

EnerSys (the “Company”) and its predecessor companies have been manufacturers of industrial batteries for over 125 years. EnerSys is a global leader in stored energy solutions for industrial applications. The Company manufactures, markets and distributes industrial batteries and related products such as chargers, outdoor cabinet enclosures, power equipment and battery accessories, and provides related after-market and customer-support services for its products. Additionally, the Company is also a provider of highly integrated power solutions and services to broadband, telecom, renewable and industrial customers.
Principles of Consolidation
Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries and any partially owned subsidiaries that the Company has the ability to control. Control generally equates to ownership percentage, whereby investments that are more than 50% owned are generally consolidated, investments in affiliates of 50% or less but greater than 20% are generally accounted for using the equity method, and investments in affiliates of 20% or less are accounted at cost minus impairment, if any. All intercompany transactions and balances have been eliminated in consolidation.
Foreign Currency Translation
Foreign Currency Translation

Results of foreign operations of subsidiaries, whose functional currency is the local currency, are translated into U.S. dollars using average exchange rates during the periods. The assets and liabilities are translated into U.S. dollars using exchange rates as of the balance sheet dates. Gains or losses resulting from translating the foreign currency financial statements are accumulated as a separate component of accumulated other comprehensive income (“AOCI”) in EnerSys’ stockholders’ equity and noncontrolling interests.

Transaction gains and losses resulting from exchange rate changes on transactions denominated in currencies other than the functional currency of the applicable subsidiary are included in the Consolidated Statements of Income, within “Other (income) expense, net”, in the year in which the change occurs.
Revenue Recognition
Revenue Recognition
The Company recognizes revenue when (or as) performance obligations are satisfied by transferring control of the performance obligation to a customer. Control of a performance obligation may transfer to the customer either at a point in time or over time depending on an evaluation of the specific facts and circumstances for each contract, including the terms and conditions of the contract as agreed with the customer, as well as the nature of the products or services to be provided.

The Company's primary performance obligation to its customers is the delivery of finished goods and products, pursuant to
purchase orders. Control of the products sold typically transfers to its customers at the point in time when the goods are shipped
as this is also when title generally passes to its customers under the terms and conditions of the customer arrangements.

Each customer purchase order sets forth the transaction price for the products and services purchased under that arrangement. Some customer arrangements include variable consideration, such as volume rebates, some of which depend upon the customers meeting specified performance criteria, such as a purchasing level over a period of time. The Company uses judgment to estimate the most likely amount of variable consideration at each reporting date. When estimating variable consideration, the Company also applies judgment when considering the probability of whether a reversal of revenue could occur and only recognize revenue subject to this constraint.

Service revenues related to the work performed for the Company’s customers by its maintenance technicians generally represent a separate and distinct performance obligation. Control for these services passes to the customer as the services are performed.

The Company's typical payment terms are 30 days and sales arrangements do not contain any significant financing component for its customers.
The Company uses historic customer product return data as a basis of estimation for customer returns and records the reduction of sales at the time revenue is recognized.

Freight charges billed to customers are included in sales and the related shipping costs are included in cost of sales in the Consolidated Statements of Income. If shipping activities are performed after a customer obtains control of a product, the Company applies a policy election to account for shipping as an activity to fulfill the promise to transfer the product to the customer.

The Company applies a policy election to exclude transaction taxes collected from customers from sales when the tax is both imposed on and concurrent with a specific revenue-producing transaction.

The Company generally provides customers with a product warranty that provides assurance that the products meet standard specifications and are free of defects. The Company maintains a reserve for claims incurred under standard product warranty programs. Performance obligations related to service warranties are not material to the Consolidated Financial Statements.

The Company pays sales commissions to its sales representatives, which may be considered as incremental costs to obtain a contract. However, since the recoverability period is less than one year, the Company has utilized the practical expedient to record these costs of obtaining a contract as an expense as they are incurred.
Warranties
Warranties
The Company’s products are warranted for a period ranging from one to twenty years for Energy Systems batteries, from one to five years for Motive Power batteries and for a period ranging from one to four years for Specialty transportation batteries. The Company provides for estimated product warranty expenses when the related products are sold. The assessment of the adequacy of the reserve includes a review of open claims and historical experience.
Cash and Cash Equivalents
Cash and Cash Equivalents

Cash and cash equivalents include all highly liquid investments with an original maturity of three months or less when purchased.
Concentration of Credit Risk
Concentration of Credit Risk

Financial instruments that subject the Company to potential concentration of credit risk consist principally of short-term cash investments and trade accounts receivable. The Company invests its cash with various financial institutions and in various investment instruments limiting the amount of credit exposure to any one financial institution or entity. The Company has bank deposits that exceed federally insured limits. In addition, certain cash investments may be made in U.S. and foreign government bonds, or other highly rated investments guaranteed by the U.S. or foreign governments. Concentration of credit risk with respect to trade receivables is limited by a large, diversified customer base and its geographic dispersion. The Company performs ongoing credit evaluations of its customers’ financial condition and requires collateral, such as letters of credit, in certain circumstances.
Accounts Receivable
Accounts Receivable
Accounts receivable are recorded net of an allowance for expected credit losses. The Company maintains an allowance for credit losses for the expected failure or inability of its customers to make required payments. The Company recognizes the allowance for expected credit losses at inception and reassesses quarterly based on management’s expectation of the asset’s collectability. The allowance is based on multiple factors including historical experience with bad debts, the credit quality of the customer base, the aging of such receivables and current macroeconomic conditions, as well as management’s expectations of conditions in the future. The Company’s allowance for uncollectible accounts receivable is based on management’s assessment of the collectability of assets pooled together with similar risk characteristics. Accounts are written off when management determines the account is uncollectible.
Inventories
Inventories

Inventories are stated at the lower of cost or net realizable value. Cost is determined using the first-in, first-out (FIFO) method. The cost of inventory consists of material, labor, and associated overhead.
Property, Plant, and Equipment
Property, Plant, and Equipment

Property, plant, and equipment are recorded at cost and include expenditures that substantially increase the useful lives of the assets. Depreciation is provided using the straight-line method over the estimated useful lives of the assets as follows: 10 to 33 years for buildings and improvements and 3 to 15 years for machinery and equipment.

Maintenance and repairs are expensed as incurred. Interest on capital projects is capitalized during the construction period.
Business Combinations
Business Combinations

The Company records an acquisition using the acquisition method of accounting and recognizes the assets acquired and liabilities assumed at their fair values as of the date of the acquisition. The excess of the purchase price over the net tangible and intangible assets is recorded to goodwill. The results of operations of the acquired business are included in the Company’s operating results from the date of acquisition.
Goodwill and Other Intangible Assets
Goodwill and Other Intangible Assets

Goodwill and indefinite-lived trademarks are tested for impairment at least annually and whenever events or circumstances occur indicating that a possible impairment may have been incurred. The Company assesses whether goodwill impairment exists using both the qualitative and quantitative assessments. The qualitative assessment involves determining whether events or circumstances exist that indicate it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill. If based on this qualitative assessment the Company determines it is more likely than not that the fair value of a reporting unit is less than its carrying amount, or if the Company elects not to perform a qualitative assessment, a quantitative assessment is performed by determining the fair value of the Company's reporting units.

Goodwill is tested for impairment by determining the fair value of the Company’s reporting units. These estimated fair values are based on financial projections, certain cash flow measures, and market capitalization.

The Company estimates the fair value of its reporting units using a weighting of fair values derived from both the income approach and the market approach. Under the income approach, the Company calculates the fair value of a reporting unit based on the present value of estimated future cash flows. Cash flow projections are based on management's estimates of revenue growth rates and operating margins, taking into consideration industry and market conditions. The discount rate used is based on the weighted-average cost of capital adjusted for the relevant risk associated with business-specific characteristics and the uncertainty related to the business's ability to execute on the projected cash flows. The market approach estimates fair value based on market multiples of revenue and earnings derived from comparable publicly-traded companies with similar operating and investment characteristics as the reporting unit. The weighting of the fair value derived from the market approach ranges from 0% to 50% depending on the level of comparability of these publicly-traded companies to the reporting unit.

In order to assess the reasonableness of the calculated fair values of its reporting units, the Company also compares the sum of the reporting units' fair values to its market capitalization and calculates an implied control premium (the excess of the sum of the reporting units' fair values over the market capitalization). The Company evaluates the control premium by comparing it to control premiums of recent comparable market transactions.
The Company assesses whether indefinite-lived intangible assets impairment exists using both the qualitative and quantitative assessments. The qualitative assessment involves determining whether events or circumstances exist that indicate it is more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount. If based on this qualitative assessment, the Company determines it is more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount or if the Company elects not to perform a qualitative assessment, a quantitative assessment is performed to determine whether an indefinite-lived intangible asset impairment exists. The Company tests the indefinite-lived intangible assets for impairment by comparing the carrying value to the fair value based on current revenue projections of the related operations, under the relief from royalty method. Any excess of the carrying value over the amount of fair value is recognized as an impairment. Any such impairment is recognized in the reporting period in which it has been identified.

Finite-lived assets such as customer relationships, technology, trademarks, licenses, and non-compete agreements are amortized on a straight-line basis over their estimated useful lives, generally over periods ranging from 3 to 20 years. The Company continually evaluates the reasonableness of the useful lives of these assets.
Impairment of Long-Lived Assets
Impairment of Long-Lived Assets

The Company reviews the carrying values of its long-lived assets to be held and used for possible impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable, based on undiscounted estimated cash flows expected to result from its use and eventual disposition. The factors considered by the Company in performing this assessment include current operating results, trends and other economic factors. In assessing the recoverability of the carrying value of a long-lived asset, the Company must make assumptions regarding future cash flows and other factors. If these estimates or the related assumptions change in the future, the Company may be required to record an impairment loss for these assets.
Environmental Expenditures
Environmental Expenditures

The Company records a loss and establishes a reserve for environmental remediation liabilities when it is probable that an asset has been impaired or a liability exists and the amount of the liability can be reasonably estimated. Reasonable estimates involve judgments made by management after considering a broad range of information including notifications, demands or settlements that have been received from a regulatory authority or private party, estimates performed by independent engineering companies and outside counsel, available facts, existing and proposed technology, the identification of other potentially responsible parties, their ability to contribute and prior experience. These judgments are reviewed quarterly as more information is received and the amounts reserved are updated as necessary. However, the reserves may materially differ from ultimate actual liabilities if the loss contingency is difficult to estimate or if management’s judgments turn out to be inaccurate. If management believes no best estimate exists, the minimum probable loss is accrued.
Derivative Financial Instruments
Derivative Financial Instruments

The Company utilizes derivative instruments to mitigate volatility related to interest rates, lead prices and foreign currency exposures. The Company does not hold or issue derivative financial instruments for trading or speculative purposes. The Company recognizes derivatives as either assets or liabilities in the accompanying Consolidated Balance Sheets and measures those instruments at fair value. Changes in the fair value of those instruments are reported in AOCI if they qualify for hedge accounting or in earnings if they do not qualify for hedge accounting. Derivatives qualify for hedge accounting if they are designated as hedge instruments and if the hedge is highly effective in achieving offsetting changes in the fair value or cash flows of the asset or liability hedged. For lead and foreign currency forward contracts, effectiveness is measured on a regular basis using statistical analysis and by comparing the overall changes in the expected cash flows of the hedging instrument with the changes in the expected all-in cash outflow required for the underlying lead and foreign currency purchases. This analysis is performed on the initial purchases quarterly that cover the quantities hedged. Accordingly, gains and losses from changes in derivative fair value of effective hedges are deferred and reported in AOCI until the underlying transaction affects earnings. In the case of cross currency fixed interest rate swap agreements, the swaps are remeasured with changes in fair value recognized in foreign currency translation adjustment within AOCI to offset the translation risk from the underlying investments. Balances in the foreign currency translation adjustment accounts remain until the sale or substantially complete liquidation of the foreign entity, upon which they are recognized as a component of income (expense).

The Company has commodity, foreign exchange and interest rate hedging authorization from the Board of Directors and has established a hedging and risk management program that includes the management of market and counterparty risk. Key risk control activities designed to ensure compliance with the risk management program include, but are not limited to, credit review and approval, validation of transactions and market prices, verification of risk and transaction limits, portfolio stress tests,
sensitivity analyses and frequent portfolio reporting, including open positions, determinations of fair value and other risk management metrics.

Market risk is the potential loss the Company and its subsidiaries may incur as a result of price changes associated with a particular financial or commodity instrument. The Company utilizes forward contracts, options, and swaps as part of its risk management strategies, to minimize unanticipated fluctuations in earnings caused by changes in commodity prices, interest rates and / or foreign currency exchange rates. All derivatives are recognized on the balance sheet at their fair value, unless they qualify for the Normal Purchase Normal Sale exemption.

Credit risk is the potential loss the Company may incur due to the counterparty’s non-performance. The Company is exposed to credit risk from interest rate, foreign currency and commodity derivatives with financial institutions. The Company has credit policies to manage their credit risk, including the use of an established credit approval process, monitoring of the counterparty positions and the use of master netting agreements.

The Company has elected to offset net derivative positions under master netting arrangements. The Company does not have any positions involving cash collateral (payables or receivables) under a master netting arrangement as of March 31, 2025 and 2024.

The Company does not have any credit-related contingent features associated with its derivative instruments.
Fair Value of Financial Instruments
Fair Value of Financial Instruments

The Company groups its recurring, non-recurring and disclosure-only fair value measurements into the following levels when making fair value measurement disclosures:
Level 1Inputs are unadjusted quoted prices in active markets for identical assets or liabilities.
Level 2Inputs are quoted prices for similar assets or liabilities in an active market, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable and market-corroborated inputs which are derived principally from or corroborated by observable market data.
Level 3Inputs are derived from valuation techniques in which one or more significant inputs or value drivers are unobservable.

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price). The Company and its subsidiaries use, as appropriate, a market approach (generally, data from market transactions), an income approach (generally, present value techniques and option-pricing models), and / or a cost approach (generally, replacement cost) to measure the fair value of an asset or liability. These valuation approaches incorporate inputs such as observable, independent market data and / or unobservable data that management believes are predicated on the assumptions market participants would use to price an asset or liability. These inputs may incorporate, as applicable, certain risks such as nonperformance risk, which includes credit risk.

Lead contracts, foreign currency contracts and interest rate contracts generally use an income approach to measure the fair value of these contracts, utilizing readily observable inputs, such as forward interest rates (e.g., Secured Overnight Financing Rate "SOFR"), forward foreign currency exchange rates (e.g., GBP and euro) and commodity prices (e.g., London Metals Exchange), as well as inputs that may not be observable, such as credit valuation adjustments. When observable inputs are used to measure all or most of the value of a contract, the contract is classified as Level 2. Over-the-counter (OTC) contracts are valued using quotes obtained from an exchange, binding and non-binding broker quotes. Furthermore, the Company obtains independent quotes from the market to validate the forward price curves. OTC contracts include forwards, swaps and options. To the extent possible, fair value measurements utilize various inputs that include quoted prices for similar contracts or market-corroborated inputs.

When unobservable inputs are significant to the fair value measurement, the asset or liability is classified as Level 3. Additionally, Level 2 fair value measurements include adjustments for credit risk based on the Company’s own creditworthiness (for net liabilities) and its counterparties’ creditworthiness (for net assets). The Company assumes that observable market prices include sufficient adjustments for liquidity and modeling risks. The Company did not have any fair value measurements that transferred between Level 2 and Level 3 as well as Level 1 and Level 2.
Income Taxes
Income Taxes

The Company accounts for income taxes using the asset and liability approach, which requires deferred tax assets and liabilities be recognized using enacted tax rates to measure the effect of temporary differences between book and tax bases on recorded assets and liabilities. Valuation allowances are recorded to reduce deferred tax assets, if it is more likely than not some portion or all of the deferred tax assets will not be realized. The need to establish valuation allowances against deferred tax assets is assessed quarterly. The primary factors used to assess the likelihood of realization are expected reversals of taxable temporary timing differences, forecasts of future taxable income and available tax planning strategies that could be implemented to realize the net deferred tax assets.

The Company recognizes tax related interest and penalties in income tax expense in its Consolidated Statement of Income.

With respect to accounting for uncertainty in income taxes, the Company evaluates tax positions to determine whether the benefits of tax positions are more likely than not of being sustained upon audit based on the technical merits of the tax position. For tax positions that are more likely than not of being sustained upon audit, the Company recognizes the largest amount of the benefit that is greater than 50% likely of being realized upon ultimate settlement. For tax positions that are not more likely than not of being sustained upon audit, the Company does not recognize any portion of the benefit. If the more likely than not threshold is not met in the period for which a tax position is taken, the Company may subsequently recognize the benefit of that tax position if the tax matter is effectively settled, the statute of limitations expires, or if the more likely than not threshold is met in a subsequent period.

No additional income taxes have been provided for any undistributed foreign earnings or any additional outside basis difference inherent in these entities, as these amounts continue to be indefinitely reinvested in foreign operations.
Regarding the GILTI tax rules, the Company is allowed to make an accounting policy choice of either (1) treating the taxes due on future US inclusions in taxable income as a current-period expense when incurred (“period cost method”) or (2) factoring amounts into a Company’s measurement of its deferred taxes (“deferred method”). The Company has elected the period cost method.
Deferred Financing Fees
Deferred Financing

Debt issuance costs that are incurred by the Company in connection with the issuance of debt are deferred and amortized to interest expense over the life of the underlying indebtedness, adjusted to reflect any early repayments and are shown as a deduction from long-term debt.
Stock-Based Compensation Plans
Stock-Based Compensation Plans

The Company measures the cost of employee services received in exchange for the award of an equity instrument based on the grant-date fair value of the award, with such cost recognized over the applicable vesting period.

Market condition-based awards

The Company grants market condition-based awards and performance condition-based awards.

Beginning in fiscal 2017 and until fiscal 2020, the Company granted market condition-based awards (“TSR”). A participant may earn between 0% to 200% of the number of awards granted, based on the total shareholder return of the Company's common stock over a three-year period, relative to the shareholder return of a defined peer group. The awards cliff vest on the third anniversary of the date of grant and are settled in common stock on the first anniversary of the vesting date. The TSR is calculated by dividing the sixty or ninety calendar day average price at end of the period (as applicable) and the reinvested dividends thereon by such sixty or ninety calendar day average price at start of the period. The maximum number of awards earned is capped at 200% of the target award. Additionally, no payout will be awarded in the event that the TSR at the vesting date reflects less than a 25% return from the average price at the grant date. These share units are similar to the share units granted prior to fiscal 2016, except that under these awards, the targets are more difficult to achieve as they are tied to the TSR of a defined peer group. The fair value of these awards is estimated at the date of grant, using a Monte Carlo Simulation.
The Company recognizes compensation expense using the straight-line method over the life of the market condition-based awards except for those issued to certain retirement-eligible participants, which are expensed on an accelerated basis.

Restricted Stock Units
The fair value of restricted stock units is based on the closing market price of the Company’s common stock on the date of grant. These awards generally vest, and are settled in common stock, at 25% per year, over a four-year period from the date of grant. The Company recognizes compensation expense using the straight-line method over the life of the restricted stock units.

Stock Options

The fair value of the options granted is estimated at the date of grant using the Black-Scholes option-pricing model utilizing assumptions based on historical data and current market data. The assumptions include expected term of the options, risk-free interest rate, expected volatility, and dividend yield. The expected term represents the expected amount of time that options granted are expected to be outstanding, based on historical and forecasted exercise behavior. The risk-free rate is based on the rate at the grant date of zero-coupon U.S. Treasury Notes with a term equal to the expected term of the option. Expected volatility is estimated using historical volatility rates based on historical weekly price changes over a term equal to the expected term of the options. The Company’s dividend yield is based on historical data. The Company recognizes compensation expense using the straight-line method over the vesting period of the options except for those issued to certain retirement-eligible participants, which are expensed on an accelerated basis.

Forfeitures

Forfeitures of share-based awards are estimated at the time of grant and revised, if necessary, in subsequent periods if actual
forfeitures differ from those estimates.
Earnings Per Share
Earnings Per Share
Basic earnings per common share (“EPS”) are computed by dividing net earnings attributable to EnerSys stockholders by the weighted-average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that would occur if securities or other contracts to issue common stock were exercised or converted into common stock utilizing the treasury stock method. At March 31, 2025, 2024 and 2023, the Company had outstanding stock options, restricted stock units, market condition and performance condition-based awards, which could potentially dilute basic earnings per share in the future.
Segment Reporting
Segment Reporting

The Company's chief operating decision maker, or CODM (the Company's Chief Executive Officer), reviews financial information for purposes of assessing business performance and allocating resources, by focusing on the lines of business on a global basis. The Company excludes certain items that are not included in the segment performance as these are managed and viewed on a consolidated basis. The Company identifies the following as its four operating segments, based on lines of business:
Energy Systems - uninterruptible power systems, or “UPS” applications for computer and computer-controlled systems, as well as telecommunications systems, switchgear and electrical control systems used in industrial facilities and electric utilities, large-scale energy storage and energy pipelines. Energy Systems also includes highly integrated power solutions and services to broadband, telecom, data center, and industrial customers, as well as thermally managed cabinets and enclosures for electronic equipment and batteries.
Motive Power - power for electric industrial forklifts, AGVs other material handling equipment used in manufacturing, and warehousing operations, as well as equipment used in floor care, mining, rail and airport ground support applications.
Specialty - premium starting, lighting and ignition applications in transportation, energy solutions for satellites, spacecraft, commercial aircraft, military, aircraft, submarines, ships, other tactical vehicles, defense applications and portable power solutions for soldiers in the field, as well as medical devices and equipment.
New Ventures - energy storage and management systems for demand charge reduction, utility back-up power, and dynamic fast charging for electric vehicles.
The operating segments of Energy Systems, Motive Power, and Specialty also represent the Company's reportable segments under ASC 280, Segment Reporting.
Recently Adopted Accounting Standards and Recently Issued Accounting Standards not yet adopted
Recently Adopted Accounting Standards

In November 2023, the Financial Accounting Standards Board issued new guidance that requires incremental disclosures related to reportable segments. That standard requires disclosure, on an annual and interim basis, of significant segment expenses that are regularly provided to the chief operating decision maker ("CODM") and included within each reported measure of profit or loss. The title and position of the CODM and how the reported measure of segment profit or loss is used by the CODM to assess segment performance and allocate resources is also required to be disclosed. The standard also permits disclosure of additional measures of segment profit. The Company adopted the new guidance for the year ended March 31, 2025.

Recently Issued Accounting Standards not yet adopted

In December 2023, the Financial Accounting Standards Board issued a final standard on improvements to income tax disclosures. The standard requires disclosure of specific categories within the effective tax rate reconciliation and details about significant reconciling items, subject to a quantitative threshold. The standard also requires information on income taxes paid disaggregated by federal, state and foreign based on a quantitative threshold. The standard is effective for fiscal years beginning after December 15, 2024. Early adoption is permitted. The standard is applied prospectively with an option for retrospective adoption. The Company is currently evaluating the impact of adopting this standard on its disclosures.

In November 2024, the Financial Accounting Standards Board issued a final standard on disaggregation of income statement expenses. The standard requires disclosure of more detailed information about certain costs and expenses in the notes to the financial statements. The standard is effective for fiscal years beginning after December 15, 2026 and for interim periods beginning after December 15, 2027. Early adoption is permitted. The standard is applied prospectively with an option for retrospective adoption. The Company is currently evaluating the impact of adopting this standard on its disclosures.
Use of Estimates
Use of Estimates
The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes.
v3.25.1
Summary of Significant Accounting Policies (Tables)
12 Months Ended
Mar. 31, 2025
Accounting Policies [Abstract]  
Schedule Of Accounts, Notes, Loans And Financing Receivable The following table sets forth the changes in the Company's allowance for doubtful
accounts:

Balance at Beginning of PeriodProvision
for Expected Credit Losses
Write-offs, net of Recoveries and OtherBalance at
End of
Period
Fiscal year ended March 31, 2023$12,219 $(431)$(3,013)$8,775 
Fiscal year ended March 31, 20248,775 1,873 (2,541)8,107 
Fiscal year ended March 31, 20258,107 3,239 (2,671)8,675 
Accounts Receivable
March 31,
20252024
Accounts receivable$606,617 $532,832 
Allowance for doubtful accounts 8,675 8,107 
Accounts receivable, net$597,942 $524,725 
v3.25.1
Leases (Tables)
12 Months Ended
Mar. 31, 2025
Leases [Abstract]  
Supplemental Balance Sheet Information Related To Leases
The following table presents lease assets and liabilities and their balance sheet classification:
Classification
As of
March 31, 2025
As of
March 31, 2024
Operating Leases:
Right-of-use assetsOther assets$83,635 $76,413 
Operating lease current liabilitiesAccrued expenses22,357 19,280 
Operating lease non-current liabilitiesOther liabilities67,033 61,687 
Finance Leases:
Right-of-use assetsProperty, plant, and equipment, net$915 $878 
Finance lease current liabilitiesCurrent portion of finance leases265 237 
Finance lease non-current liabilitiesFinance leases592 647 
Components Of Lease Expense
The components of lease expense for the fiscal years ended March 31, 2025 and March 31, 2024 were as follows:
ClassificationMarch 31, 2025March 31, 2024
Operating Leases:
Operating lease costOperating expenses$27,040 $28,030 
Variable lease costOperating expenses6,338 11,669 
Short term lease costOperating expenses16,573 8,078 
Finance Leases:
DepreciationOperating expenses$282 $297 
Interest expenseInterest expense66 57 
Total$50,299 $48,131 
Weighted Average Lease Term And Discount Rates
The following table presents the weighted average lease term and discount rates for leases as of March 31, 2025 and March 31, 2024:
March 31, 2025
March 31, 2024
Operating Leases:
Weighted average remaining lease term (years)5.1 years5.5 years
Weighted average discount rate6.06%5.38%
Finance Leases:
Weighted average remaining lease term (years)3.2 years3.8 years
Weighted average discount rate7.07%7.4%
Maturity Of Operating Lease Liability
The following table presents future payments due under leases reconciled to lease liabilities as of March 31, 2025:
Finance LeasesOperating Leases
Year ended March 31,
2026$362 $27,147 
2027343 24,158 
2028303 20,674 
2029123 14,121 
203010 8,243 
Thereafter— 10,622 
Total undiscounted lease payments1,141 104,965 
Present value discount115 15,577 
Lease liability$1,026 $89,388 
Maturity Of Finance Lease Liability
The following table presents future payments due under leases reconciled to lease liabilities as of March 31, 2025:
Finance LeasesOperating Leases
Year ended March 31,
2026$362 $27,147 
2027343 24,158 
2028303 20,674 
2029123 14,121 
203010 8,243 
Thereafter— 10,622 
Total undiscounted lease payments1,141 104,965 
Present value discount115 15,577 
Lease liability$1,026 $89,388 
Supplemental Cash Flow Information Related To Leases
The following table presents supplemental disclosures of cash flow information related to leases for the fiscal years ended March 31, 2025 and March 31, 2024:
March 31, 2025March 31, 2024
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases$64 $57 
Operating cash flows from operating leases26,022 27,406 
Financing cash flows from finance leases268 275 
Supplemental non-cash information on lease liabilities arising from right-of-use assets:
Right-of-use assets obtained in exchange for new finance lease liabilities$302 $811 
Right-of-use assets obtained in exchange for new operating lease liabilities28,184 31,284 
v3.25.1
Acquisition (Tables)
12 Months Ended
Mar. 31, 2025
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]  
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
The following table summarizes the provisional fair values of the assets acquired and liabilities assumed at the date of the acquisition:

Trade Receivables $10,325 
Inventory 48,362 
Prepaid and other current assets1,392 
Property, plant and equipment14,701 
Other intangible assets 90,500 
Deferred Taxes1,069 
Other assets2,003 
Total assets acquired$168,352 
Accounts payable2,485 
Accrued liabilities8,078 
Other liabilities2,236 
Total liabilities assumed$12,799 
Net assets acquired$155,553 
Consideration transferred:
Cash consideration, net of cash and restricted cash acquired$206,374 
Total consideration transferred206,374 
Less: Fair value of acquired identifiable assets and liabilities155,553 
Goodwill$50,821 
v3.25.1
Accounts Receivable (Tables)
12 Months Ended
Mar. 31, 2025
Receivables [Abstract]  
Schedule Of Accounts, Notes, Loans And Financing Receivable The following table sets forth the changes in the Company's allowance for doubtful
accounts:

Balance at Beginning of PeriodProvision
for Expected Credit Losses
Write-offs, net of Recoveries and OtherBalance at
End of
Period
Fiscal year ended March 31, 2023$12,219 $(431)$(3,013)$8,775 
Fiscal year ended March 31, 20248,775 1,873 (2,541)8,107 
Fiscal year ended March 31, 20258,107 3,239 (2,671)8,675 
Accounts Receivable
March 31,
20252024
Accounts receivable$606,617 $532,832 
Allowance for doubtful accounts 8,675 8,107 
Accounts receivable, net$597,942 $524,725 
v3.25.1
Inventories (Tables)
12 Months Ended
Mar. 31, 2025
Inventory Disclosure [Abstract]  
Summary Of Net Inventories
 March 31,
 20252024
Raw materials$296,365 $284,773 
Work-in-process125,459 115,191 
Finished goods318,170 297,734 
Total$739,994 $697,698 
v3.25.1
Property, Plant, and Equipment (Tables)
12 Months Ended
Mar. 31, 2025
Property, Plant and Equipment [Abstract]  
Summary Of Property, Plant, And Equipment
Property, plant, and equipment consist of:
 March 31,
 20252024
Land, buildings, and improvements$322,058 $313,258 
Machinery and equipment994,003 930,858 
Construction in progress115,500 91,829 
1,431,561 1,335,945 
Less accumulated depreciation(839,128)(803,495)
Total$592,433 $532,450 
v3.25.1
Goodwill and Other Intangible Assets (Tables)
12 Months Ended
Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule Of Company's Other Intangible Assets
Information regarding the Company’s other intangible assets are as follows:
 March 31,
 20252024
 Gross
Amount
Accumulated
Amortization
Net
Amount
Gross
Amount
Accumulated
Amortization
Net
Amount
Indefinite-lived intangible assets:
Trademarks$129,210 $(953)$128,257 $131,167 $(953)$130,214 
Finite-lived intangible assets:
Customer relationships356,800 (168,932)187,868 295,215 (147,833)147,382 
Non-compete2,825 (2,825)— 2,825 (2,825)— 
Technology119,645 (65,160)54,485 96,708 (55,969)40,739 
Trademarks14,815 (9,995)4,820 9,554 (8,482)1,072 
Licenses1,196 (1,196)— 1,196 (1,196)— 
Total$624,491 $(249,061)$375,430 $536,665 $(217,258)$319,407 
Schedule Of Changes In The Carrying Amount Of Goodwill By Business Segment
The following table presents the changes in the carrying amount of goodwill by segment during fiscal 2024 and 2025:

 Energy SystemsMotive PowerSpecialtyTotal
Balance at March 31, 2023$258,204 $321,530 $96,981 $676,715 
Acquisitions— 4,390 — 4,390 
Foreign currency translation adjustment807 798 224 1,829 
Balance at March 31, 2024$259,011 $326,718 $97,205 $682,934 
Acquisitions— — 50,821 50,821 
Foreign currency translation adjustment(13,264)328 254 (12,682)
Balance at March 31, 2025$245,747 $327,046 $148,280 $721,073 
v3.25.1
Prepaid and Other Current Assets (Tables)
12 Months Ended
Mar. 31, 2025
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule Of Prepaid And Other Current Assets
Prepaid and other current assets consist of the following:
 March 31,
 20252024
Prepaid income taxes$246,816 $94,866 
Contract assets71,774 55,363 
Prepaid non-income taxes21,357 19,509 
Non-trade receivables6,674 4,124 
Other62,126 53,087 
Total$408,747 $226,949 
v3.25.1
Accrued Expenses (Tables)
12 Months Ended
Mar. 31, 2025
Payables and Accruals [Abstract]  
Summary Of Accrued Expenses
Accrued expenses consist of the following:
 March 31,
 20252024
Payroll and benefits$90,956 $84,734 
Accrued selling expenses48,098 46,738 
Contract liabilities28,821 27,649 
Warranty28,090 26,304 
Operating lease liabilities22,357 19,280 
Income taxes payable22,110 16,716 
Freight19,908 16,549 
VAT and other non-income taxes14,649 17,595 
Interest9,025 9,201 
Other56,593 58,954 
Total$340,607 $323,720 
v3.25.1
Debt (Tables)
12 Months Ended
Mar. 31, 2025
Debt Disclosure [Abstract]  
Schedule Of Long-Term Debt
The following summarizes the Company’s long-term debt as of March 31, 2025 and March 31, 2024:

 20252024
 PrincipalUnamortized Issuance CostsPrincipalUnamortized Issuance Costs
Senior Notes$600,000 $5,276 $600,000 $6,064 
Fourth Amended Credit Facility, due 2026490,000 1,183 210,000 1,971 
$1,090,000 $6,459 $810,000 $8,035 
Less: Unamortized issuance costs 6,459 8,035 
Long-term debt, net of unamortized issuance costs$1,083,541 $801,965 
v3.25.1
Other Liabilities (Tables)
12 Months Ended
Mar. 31, 2025
Other Liabilities Disclosure [Abstract]  
Schedule Of Other Long-Term Liabilities
Other liabilities consist of the following:

 March 31,
 20252024
Operating lease liabilities$67,033 $61,687 
Warranty38,331 34,515 
Long-term interest rate swaps33,002 19,167 
Pension25,307 25,512 
Liability for uncertain tax positions3,335 3,300 
Contract liabilities2,801 959 
Other5,109 6,742 
Total$174,918 $151,882 
v3.25.1
Fair Value of Financial Instruments (Tables)
12 Months Ended
Mar. 31, 2025
Fair Value Disclosures [Abstract]  
Financial Assets And (Liabilities), Measured At Fair Value On A Recurring Basis
The following tables represent the financial assets and (liabilities) measured at fair value on a recurring basis as of March 31, 2025 and March 31, 2024 and the basis for that measurement:
Total Fair Value Measurement March 31, 2025Quoted Price in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Lead forward contracts$(225)$— $(225)$— 
Foreign currency forward contracts1,629 — 1,629 — 
Interest rate swaps— — 
Net investment hedges(33,002)— (33,002)— 
Total derivatives$(31,593)$— $(31,593)$— 
 
Total Fair Value Measurement March 31, 2024Quoted Price in
Active Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Lead forward contracts$(835)$— $(835)$— 
Foreign currency forward contracts— — 
Interest Rate Swaps2,696 2,696 
Net investment hedges(19,167)— (19,167)— 
Total derivatives$(17,301)$— $(17,301)$— 
Carrying Amounts And Estimated Fair Values Of Company's Financial Instruments
The carrying amounts and estimated fair values of the Company’s derivatives and Senior Notes at March 31, 2025 and 2024 were as follows:

 March 31, 2025March 31, 2024
 Carrying
Amount
Fair ValueCarrying
Amount
Fair Value
Financial assets:
Derivatives(1)
$— $— $— $— 
Financial liabilities:
Senior Notes (2)
$600,000 $591,420 $600,000 $582,750 
Derivatives(1)
(31,593)(31,593)(17,301)(17,301)
(1)Represents lead, foreign currency forward contracts, interest rate swaps, and net investment hedges (see Note 14 for asset and liability positions of the lead, foreign currency forward contracts and net investment hedges at March 31, 2025 and March 31, 2024).
(2)The fair value amount of the Senior Notes at March 31, 2025 and March 31, 2024 represent the trading value of the instruments.
v3.25.1
Derivative Financial Instruments (Tables)
12 Months Ended
Mar. 31, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Fair Value Of Derivative Instruments In The Consolidated Balance Sheets
Presented below in tabular form is information on the location and amounts of derivative fair values in the Consolidated Balance Sheets and derivative gains and losses in the Consolidated Statements of Income:

Fair Value of Derivative Instruments
March 31, 2025 and 2024
 Derivatives and Hedging Activities Designated as Cash Flow HedgesDerivatives and Hedging Activities Designated as Net Investment HedgesDerivatives and Hedging Activities Not Designated as Hedging Instruments
 March 31, 2025March 31, 2024March 31, 2025March 31, 2024March 31, 2025March 31, 2024
Prepaid and other current assets:
Lead forward contracts$— $— $— $— $— $— 
Foreign currency forward contracts— 396 — — 1,919 — 
Other Assets:
Interest rate swaps2,696 — — — — 
Total assets$$3,092 $— $— $1,919 $— 
Accrued expenses:
Lead forward contracts$225 $835 $— $— $— $— 
Foreign currency forward contracts290 — — — — 391 
Other liabilities:
Interest rate swaps— — — — — — 
Net investment hedges— — 33,002 19,167 — — 
Total liabilities$515 $835 $33,002 $19,167 $— $391 
The Effect of Derivative Instruments on the Consolidated Statements of Income
The Effect of Derivative Instruments on the Consolidated Statements of Income
For the fiscal year ended March 31, 2025

 
Derivatives Designated as Cash Flow HedgesPretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)Location of Gain
(Loss) Reclassified
from
AOCI into Income
(Effective Portion)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Lead forward contracts$(3,703)Cost of goods sold$(4,880)
Foreign currency forward contracts1,475 Cost of goods sold1,297 
Interest Rate Swaps (825)Interest expense1,866 
Total$(3,053)$(1,717)

Derivatives Designated as Net Investment HedgesPretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)Location of Gain
(Loss) Reclassified
from
AOCI into Income
(Effective Portion)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Cross currency fixed interest rate swaps$(9,422)Interest expense$4,413 
Total$(9,422)$4,413 
The Effect of Derivative Instruments on the Consolidated Statements of Income
For the fiscal year ended March 31, 2024

 
Derivatives Designated as Cash Flow HedgesPretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)Location of Gain
(Loss) Reclassified
from
AOCI into Income
(Effective Portion)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Lead forward contracts$(455)Cost of goods sold$5,388 
Foreign currency forward contracts1,740 Cost of goods sold612 
Interest rate swaps6,915 Interest Expense3,057 
Total$8,200 $9,057 

Derivatives Designated as Net Investment HedgesPretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)Location of Gain
(Loss) Reclassified
from
AOCI into Income
(Effective Portion)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Cross currency fixed interest rate swaps$(2,695)Interest expense$713 
Total$(2,695)$713 
The Effect of Derivative Instruments on the Consolidated Statements of Income
For the fiscal year ended March 31, 2023

 
Derivatives Designated as Cash Flow HedgesPretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)Location of Gain
(Loss) Reclassified
from
AOCI into Income
(Effective Portion)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Lead forward contracts$(3,883)Cost of goods sold$(3,765)
Foreign currency forward contracts1,849 Cost of goods sold2,589 
Interest rate swaps$(1,162)Interest expense$— 
Total$(3,196)$(1,176)

Derivatives Designated as Net Investment HedgesPretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)Location of Gain
(Loss) Reclassified
from
AOCI into Income
(Effective Portion)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)
Cross currency fixed interest rate swaps$29,201 Interest expense$3,587 
Total$29,201 $3,587 
Effect Of Derivative Instruments
Derivatives Not Designated as Hedging InstrumentsLocation of Gain (Loss)
Recognized in Income
on Derivatives
Pretax Gain (Loss)
Foreign currency forward contractsOther (income) expense, net$3,136 
Total$3,136 
Derivatives Not Designated as Hedging InstrumentsLocation of Gain (Loss)
Recognized in Income
on Derivatives
Pretax Gain (Loss)
Foreign currency forward contractsOther (income) expense, net$(846)
Total$(846)
Derivatives Not Designated as Hedging InstrumentsLocation of Gain (Loss)
Recognized in Income
on Derivatives
Pretax Gain (Loss)
Foreign currency forward contractsOther (income) expense, net$1,182 
Total$1,182 
v3.25.1
Income Taxes (Tables)
12 Months Ended
Mar. 31, 2025
Income Tax Disclosure [Abstract]  
Income Tax Expense
 Fiscal year ended March 31,
 202520242023
Current income tax expense
Current:
Federal$39,021 $21,785 $21,203 
State11,147 3,252 5,654 
Foreign24,599 27,396 23,208 
Total current income tax expense74,767 52,433 50,065 
Deferred income tax (benefit) expense
Federal(6,000)(25,008)(18,370)
State(1,446)(3,564)(2,534)
       Foreign(24,479)(772)5,668 
Total deferred income tax (benefit) expense(31,925)(29,344)(15,236)
Total income tax expense$42,842 $23,089 $34,829 
Earnings Before Income Taxes
Earnings before income taxes consists of the following:
 
 Fiscal year ended March 31,
 202520242023
United States$201,332 $99,230 $38,703 
Foreign205,245 192,955 171,936 
Earnings before income taxes$406,577 $292,185 $210,639 
Deferred Tax Assets And Liabilities
The following table sets forth the tax effects of temporary differences that give rise to significant portions of the deferred tax assets and liabilities:
 
 March 31,
 20252024
Deferred tax assets:
Accounts receivable$278 $309 
Inventories13,154 13,472 
Net operating loss carryforwards44,442 51,005 
Lease liabilities21,016 20,081 
Capitalized R&D Expenditures48,856 32,740 
Accrued expenses42,909 35,132 
Other assets22,080 29,079 
Gross deferred tax assets192,735 181,818 
Less valuation allowance(25,594)(35,754)
Total deferred tax assets167,141 146,064 
Deferred tax liabilities:
Property, plant and equipment49,025 45,493 
Lease Right-of-use assets21,016 20,071 
Intangible assets32,332 56,726 
Other liabilities7,616 4,560 
Total deferred tax liabilities109,989 126,850 
Net deferred tax assets (liabilities)$57,152 $19,214 
Schedule of Change in Valuation Allowance
The following table sets forth the changes in the Company's valuation allowance for fiscal 2025, 2024 and 2023:

Balance at
Beginning of
Period
Additions
Charged to
Expense
Valuation Allowance Reversal
Other(1)
Balance at
End of
Period
Fiscal year ended March 31, 202331,017 2,654 (586)(1,913)31,172 
Fiscal year ended March 31, 202431,172 9,463 (2,614)(2,267)35,754 
Fiscal year ended March 31, 202535,754 4,949 (9,219)(5,890)25,594 
(1)Includes the impact of currency changes and the expiration of net operating losses for which a full valuation allowance was recorded.
Reconciliation Of Income Taxes At The Statutory Rate
A reconciliation of income taxes at the statutory rate (21.0% for fiscal 2025, 2024 and 2023) to the income tax provision is as follows:
 
 Fiscal year ended March 31,
 202520242023
United States statutory income tax expense$85,381 $61,358 $44,233 
Increase (decrease) resulting from:
State income taxes, net of federal effect7,361 (995)1,714 
Nondeductible expenses and other 14,135 3,833 6,028 
Net effect of GILTI, FDII, BEAT3,322 3,313 2,457 
Effect of foreign operations(14,074)(17,475)(12,978)
Valuation allowance(4,270)6,849 2,068 
Research and Development Credit(5,652)(5,158)(5,063)
AMPC Impact(38,764)(28,636)(3,630)
Tax Act(4,597)— — 
Income tax expense$42,842 $23,089 $34,829 
Reconciliation Of Unrecognized Tax Benefits
The following table summarizes activity of the total amounts of unrecognized tax benefits:

 Fiscal year ended March 31,
 202520242023
Balance at beginning of year$2,845 $3,495 $4,770 
Increases related to current year tax positions630 (2)24 
Increases related to prior year tax positions— — (1)
Decreases related to prior tax positions — (129)— 
Decreases related to prior year tax positions settled— — (77)
Lapse of statute of limitations(595)(519)(1,221)
Balance at end of year$2,880 $2,845 $3,495 
v3.25.1
Retirement Plans (Tables)
12 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Components Of Net Periodic Pension Cost
Net periodic pension cost for fiscal 2025, 2024 and 2023, includes the following components:
 
 United States PlansInternational Plans
 Fiscal year ended March 31,Fiscal year ended March 31,
 202520242023202520242023
Service cost$— $— $— $954 $884 $918 
Interest cost491 657 582 2,501 2,215 1,715 
Expected return on plan assets(141)(424)(455)(1,421)(1,244)(2,005)
Amortization and deferral(61)— — 582 326 478 
Settlement gain (1,548)— — — — — 
Net periodic benefit cost$(1,259)$233 $127 $2,616 $2,181 $1,106 
Summary Of Change In Projected Benefit Obligation
The following table sets forth a reconciliation of the related benefit obligation, plan assets, and accrued benefit costs related to the pension benefits provided by the Company for those employees covered by defined benefit plans:
 
 United States PlansInternational Plans
 March 31,March 31,
  
2025202420252024
Change in projected benefit obligation
Benefit obligation at the beginning of the period$13,313 $14,056 $55,806 $51,718 
Service cost— — 954 884 
Interest cost491 657 2,501 2,215 
Benefits paid, inclusive of plan expenses(635)(865)(2,759)(2,353)
Plan curtailments and settlements(13,338)— — — 
Plan combinations — — — 1,835 
Actuarial (gains) losses 169 (535)(3,601)633 
Foreign currency translation adjustment— 901 874 
Benefit obligation at the end of the period$— $13,313 $53,802 $55,806 
Summary Of Change In Plan Assets
Change in plan assets
Fair value of plan assets at the beginning of the period$15,153 $13,975 $32,563 $40,104 
Actual return on plan assets(23)2,043 (2,075)(7,717)
Employer contributions— — 1,720 1,655 
Benefits paid, inclusive of plan expenses(635)(865)(2,759)(2,353)
Plan curtailments and settlements(13,338)— — — 
Foreign currency translation adjustment— — 715 874 
Fair value of plan assets at the end of the period$1,157 $15,153 $30,164 $32,563 
Funded status surplus (deficit)$1,157 $1,840 $(23,638)$(23,243)
Summary Of Amounts Recognized In The Balance Sheets
 March 31,
 20252024
Amounts recognized in the Consolidated Balance Sheets consist of:
Non-current assets$4,409 $5,606 
Accrued expenses(1,583)(1,497)
Other liabilities(25,307)(25,512)
Funded status deficit$(22,481)$(21,403)
Summary Of Amounts In AOCI Before Taxes
The following table represents pension components (before tax) and related changes (before tax) recognized in AOCI for the Company’s pension plans for the years ended March 31, 2025, 2024 and 2023:
 Fiscal year ended March 31,
 202520242023
Amounts recorded in AOCI before taxes:
Prior service cost$(43)$(85)$(128)
Net loss(11,145)(9,590)(2,307)
Net amount recognized$(11,188)$(9,675)$(2,435)

The following table represents changes in plan assets and benefit obligations recognized in AOCI for the Company’s pension plans for the years ended March 31, 2025, 2024 and 2023:
Summary Of Changes In AOCI
 Fiscal year ended March 31,
 202520242023
Changes in plan assets and benefit obligations:
New prior service cost$— $— $— 
Net loss (gain) arising during the year228 7,439 (10,352)
Effect of exchange rates on amounts included in AOCI260 127 (957)
Amounts recognized as a component of net periodic benefit costs:
Amortization of prior service cost(42)(42)(41)
Amortization or settlement recognition of net loss1,069 (284)(438)
Total recognized in other comprehensive (income) loss$1,515 $7,240 $(11,788)
Summary Of Recognized Components Of Net Periodic Pension Cost Included In Accumulated Other Comprehensive Income
The amounts included in AOCI as of March 31, 2025 that are expected to be recognized as components of net periodic pension cost (before tax) during the next twelve months are as follows:
 
Prior service cost$(42)
Net loss(567)
Net amount expected to be recognized$(609)
Summary Of Accumulated Benefit Obligation Related To All Defined Pension Plans
The accumulated benefit obligation related to all defined benefit pension plans and information related to unfunded and underfunded defined benefit pension plans at the end of each fiscal year are as follows:
 
 United States PlansInternational Plans
 March 31,March 31,
 2025202420252024
All defined benefit plans:
Accumulated benefit obligation$— $13,313 $51,690 $53,169 
Unfunded defined benefit plans:
Projected benefit obligation$— $— $26,871 $27,009 
Accumulated benefit obligation— — 24,787 24,930 
Defined benefit plans with a projected benefit obligation in excess of the fair value of plan assets:
Projected benefit obligation$— $— $27,214 $27,009 
Fair value of plan assets— — 325 — 
Defined benefit plans with an accumulated benefit obligation in excess of the fair value of plan assets:
Projected benefit obligation$— $— $26,871 $27,009 
Accumulated benefit obligation— — 24,787 24,930 
Fair value of plan assets— — — — 
Significant Assumptions Used To Determine The Net Periodic Benefit Cost
Significant assumptions used to determine the net periodic benefit cost for the U.S. and International plans were as follows:

 
 United States PlansInternational Plans
 Fiscal year ended March 31,Fiscal year ended March 31,
 202520242023202520242023
Discount rate5.2 %4.9 %3.7 %
3.8%-5.3%
3.5%-6.0%
1.5%-5.4%
Expected return on plan assets3.25 5.5 5.5 
4.8-5
4-4.7
3.1-5.3
Rate of compensation increaseN/AN/AN/A
2.5-4.5
2.3-4.5
1.8-5.5
N/A = not applicable
Significant Assumptions Used To Determine The Projected Benefit Obligations
Significant assumptions used to determine the projected benefit obligations for the U.S. and International plans were as follows:

 
 United States PlansInternational Plans
 March 31,March 31,
 2025202420252024
Discount rateN/A5.2 %
3.3%-5.9%
3.8%-5.3%
Rate of compensation increaseN/AN/A
2.0-4.5
2.5-4.5
 N/A = not applicable
Summary Of Pension Plan Investments Measured At Fair Value
The following table represents the Company's pension plan investments measured at fair value as of March 31, 2025 and 2024 and the basis for that measurement:

 March 31, 2025
 United States PlansInternational Plans
 Total Fair
Value
Measurement
Quoted Price
In Active
Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Total Fair
Value
Measurement
Quoted Price
In Active
Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Asset category:
Cash and cash equivalents$1,157 $1,157 $— $— $3,252 $3,252 $— $— 
Equity securities
US(a)
— — — — — — — — 
International(b)
— — — — — — — — 
Fixed income(c)
— — — — 324 — 324 — 
Other investments(d)
— — — — 26,588 — — 26,588 
Total$1,157 $1,157 $— $— $30,164 $3,252 $324 $26,588 
 
 March 31, 2024
 United States PlansInternational Plans
 Total Fair
Value
Measurement
Quoted Price
In Active
Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Total Fair
Value
Measurement
Quoted Price
In Active
Markets
for Identical
Assets
(Level 1)
Significant
Other
Observable
Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Asset category:
Cash and cash equivalents$5,473 $5,473 $— $— $3,752 $3,752 $— $— 
Equity securities
US(a)
— — — — — — — — 
International(b)
— — — — — — — — 
Fixed income(c)
9,680 9,680 — — 314 — 314 — 
Other investments(d)
— — — — 28,497 — — 28,497 
Total$15,153 $15,153 $— $— $32,563 $3,752 $314 $28,497 

The fair values presented above were determined based on valuation techniques to measure fair value as discussed in Note 1.
(a)US equities include companies that are well diversified by industry sector and equity style (i.e., growth and value strategies). Active and passive management strategies are employed. Investments are primarily in large capitalization stocks and, to a lesser extent, mid- and small-cap stocks.
(b)International equities are invested in companies that are traded on exchanges outside the U.S. and are well diversified by industry sector, country and equity style. Active and passive strategies are employed. The vast majority of the investments are made in companies in developed markets with a small percentage in emerging markets.
(c)Fixed income consists primarily of investment grade bonds from diversified industries.
(d)Other investments consists of a buy-in annuity insurance contract. The fair value of the buy-in policy is set equal to the value of the obligations as determined by the actuary. This value is considered Level 3 due to the use of the significant unobservable inputs.

Level 3 Rollforward

The following presents our Level 3 Rollforward for our defined pension plan assets:
Beginning of year balance as of March 31, 2024$28,497 
Actual return on plan assets, relating to assets still held at the reporting date$(1,511)
Purchases$(1,024)
Change due to exchange rate changes$626 
End of year balance as of March 31, 2025$26,588 
Summary Of Estimated Future Benefit Payments
Estimated future benefit payments under the Company’s pension plans are as follows:
 
2026$2,588 
20272,468 
20283,014 
20293,579 
20303,965 
Years 2031-203520,097 
v3.25.1
Stockholders’ Equity (Tables)
12 Months Ended
Mar. 31, 2025
Equity [Abstract]  
Change in Number of Shares of Common Stock Outstanding
The following demonstrates the change in the number of shares of common stock outstanding during fiscal years ended March 31, 2023, 2024 and 2025, respectively:
 
Shares outstanding as of March 31, 2022
40,986,658 
Purchase of treasury stock(358,365)
Shares issued towards equity-based compensation plans, net of equity awards surrendered for option price and taxes272,766 
Shares outstanding as of March 31, 2023
40,901,059 
Purchase of treasury stock(1,002,415)
Shares issued under equity-based compensation plans, net of equity awards surrendered for option price and taxes373,292 
Shares outstanding as of March 31, 2024
40,271,936 
Purchase of treasury stock(1,568,292)
Shares issued under equity-based compensation plans, net of equity awards surrendered for option price and taxes488,417 
Shares outstanding as of March 31, 2025
39,192,061 
Components Of Accumulated Other Comprehensive Income
The components of AOCI, net of tax, are as follows:
 
Beginning
Balance
Before ReclassificationsAmount Reclassified from AOCIEnding
Balance
March 31, 2025
Pension funded status adjustment$(9,798)$132 $(708)$(10,374)
Net unrealized gain (loss) on derivative instruments755 (2,339)1,315 (269)
Foreign currency translation adjustment (1)
(195,808)(41,028)— (236,836)
Accumulated other comprehensive loss$(204,851)$(43,235)$607 $(247,479)
March 31, 2024
Pension funded status adjustment$(4,423)$(5,672)$297 $(9,798)
Net unrealized gain (loss) on derivative instruments1,411 6,283 (6,939)755 
Foreign currency translation adjustment (1)
(180,462)(15,346)— (195,808)
Accumulated other comprehensive loss$(183,474)$(14,735)$(6,642)$(204,851)
March 31, 2023
Pension funded status adjustment$(12,637)$7,872 $342 $(4,423)
Net unrealized gain (loss) on derivative instruments2,963 (2,453)901 1,411 
Foreign currency translation adjustment (1)
(133,821)(46,641)— (180,462)
Accumulated other comprehensive loss$(143,495)$(41,222)$1,243 $(183,474)
(1) Foreign currency translation adjustment for the fiscal year ended March 31, 2025, March 31, 2024, March 31, 2023 and includes a $10,600 gain (net of taxes of $3,235), $2,615 loss (net of taxes of $797) and 19,491 gain (net of taxes 4,557), respectively, related to the Company's cross-currency fixed interest rate swap contracts.
Reclassification out of Accumulated Other Comprehensive Income
The following table presents reclassifications from AOCI during the twelve months ended March 31, 2025:
Components of AOCI Amounts Reclassified from AOCILocation of (Gain) Loss Recognized on Income Statement
Derivatives in Cash Flow Hedging Relationships:
Net unrealized loss on derivative instruments$1,717 Cost of goods sold
Tax benefit(402)
Net unrealized loss on derivative instruments, net of tax$1,315 
Derivatives in net investment hedging relationships:
Net unrealized gain on derivative instruments$(4,413)Interest expense
Tax expense1,032 
Net unrealized gain on derivative instruments, net of tax$(3,381)
Defined benefit pension costs:
Prior service costs, deferrals, and settlements$(1,027)Net periodic benefit cost, included in other (income) expense, net - See Note 16
Tax expense319 
Net periodic benefit cost, net of tax$(708)




The following table presents reclassifications from AOCI during the twelve months ended March 31, 2024:

Components of AOCI Amounts Reclassified from AOCILocation of (Gain) Loss Recognized on Income Statement
Derivatives in Cash Flow Hedging Relationships:
Net unrealized gain on derivative instruments$(9,057)Cost of goods sold
Tax benefit2,118 
Net unrealized gain on derivative instruments, net of tax$(6,939)
Derivatives in net investment hedging relationships:
Net unrealized gain on derivative instruments$(713)Interest expense
Tax expense167 
Net unrealized gain on derivative instruments, net of tax$(546)
Defined benefit pension costs:
Prior service costs and deferrals$326 Net periodic benefit cost, included in other (income) expense, net - See Note 16
Tax benefit(29)
Net periodic benefit cost, net of tax$297 

The following table presents reclassifications from AOCI during the twelve months ended March 31, 2023:
Components of AOCIAmounts Reclassified from AOCILocation of (Gain) Loss Recognized on Income Statement
Derivatives in Cash Flow Hedging Relationships:
Net unrealized loss on derivative instruments$1,176 Cost of goods sold
Tax benefit(275)
Net unrealized loss on derivative instruments, net of tax$901 
Derivatives in net investment hedging relationships:
Net unrealized gain on derivative instruments$(3,587)Interest expense
Tax expense839 
Net unrealized gain on derivative instruments, net of tax$(2,748)
Defined benefit pension costs:
Prior service costs and deferrals$478 Net periodic benefit cost, included in other (income) expense, net - See Note 16
Tax benefit(136)
Net periodic benefit cost, net of tax$342 
v3.25.1
Stock-Based Compensation (Tables)
12 Months Ended
Mar. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Summary Of Stock Option Activity
For purposes of determining the fair value of stock options granted, the Company used a Black-Scholes Model with the following assumptions:

202520242023
Risk-free interest rate3.84 %4.24 %2.92 %
Dividend yield1.02 %0.95 %0.99 %
Expected life (years)666
Volatility38.61 %38.25 %37.40 %

The following table summarizes the Company’s stock option activity in the years indicated:
 
Number of
Options
Weighted-
Average
Remaining
Contract
Term (Years)
Weighted-
Average
Exercise
Price
Aggregate
Intrinsic
Value
Options outstanding as of March 31, 2022975,605 7.5$78.94 $3,605 
Granted310,140 75.33 — 
Exercised(75,180)65.22 1,561 
Forfeited(9,575)80.05 39 
Expired(4,679)85.12 — 
Options outstanding as of March 31, 20231,196,311 7.3$78.83 $12,150 
Granted200,314 101.04 — 
Exercised(197,350)71.81 6,110 
Forfeited(9,166)78.68 158 
Expired— — — 
Options outstanding as of March 31, 20241,190,109 7.0$83.74 $15,043 
Granted266,027 101.56 — 
Exercised(139,016)76.66 3,950 
Forfeited(29,340)98.38 115 
Expired— — — 
Options outstanding as of March 31, 20251,287,780 6.8$87.85 $10,472 
Options exercisable as of March 31, 2025818,637 5.7$83.13 $8,951 
Options vested and expected to vest, as of March 31, 20251,269,049 6.8$87.68 $10,455 
Summary Of Information Regarding Stock Options Outstanding And Exercisable
The following table summarizes information regarding stock options outstanding as of March 31, 2025:
Range of Exercise PricesNumber of
Options
Weighted-
Average
Remaining
Contractual Life (Years)
Weighted-
Average
Exercise Price
$57.60-$60.0090,520 4.0$57.73 
$70.01-$80.00378,411 6.4$75.71 
$80.01-$90.00159,380 4.2$83.01 
$90.01-$100.00209,579 8.1$93.60 
$100.01-$109.69449,890 8.1$103.24 
1,287,780 6.8$87.85 
Summary Of The Changes In Restricted Stock Units And Market Share Units
A summary of the changes in restricted stock units, including DSU's, and TSRs awarded to employees and directors that were outstanding under the Company’s equity compensation plans during fiscal 2025 is presented below:

 Restricted Stock Units  (RSU)Market condition-based Share Units (TSR)
 Number of
RSU
Weighted-
Average
Grant Date
Fair Value
Number of
TSR
Weighted-
Average
Grant Date
Fair Value
Non-vested awards as of March 31, 20241,022,836 $69.24 1,132 $66.89 
Granted361,222 94.63 — — 
Stock dividend9,685 75.49 11 66.89 
Performance factor— — — — 
Vested(435,043)64.39 — — 
Forfeitures(38,993)86.69 — — 
Non-vested awards as of March 31, 2025919,707 $80.42 1,143 $66.89 
v3.25.1
Earnings Per Share (Tables)
12 Months Ended
Mar. 31, 2025
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,
 202520242023
Net earnings attributable to EnerSys stockholders$363,735 $269,096 $175,810 
Weighted-average number of common shares outstanding:
Basic39,760,829 40,669,392 40,809,235 
Dilutive effect of:
Common shares from exercise and lapse of equity awards, net of shares assumed reacquired677,750 702,047 517,520 
Diluted weighted-average number of common shares outstanding40,438,579 41,371,439 41,326,755 
Basic earnings per common share attributable to EnerSys stockholders$9.15 $6.62 $4.31 
Diluted earnings per common share attributable to EnerSys stockholders$8.99 $6.50 $4.25 
Anti-dilutive equity awards not included in diluted weighted-average common shares551,411 356,893 710,678 
v3.25.1
Restructuring, Exit and Other Charges (Tables)
12 Months Ended
Mar. 31, 2025
Restructuring and Related Activities [Abstract]  
Acquisition And Non-Acquisition Related Restructuring Reserve
Restructuring and exit charges for fiscal 2025, 2024 and 2023 by reportable segments are as follows:

 Fiscal year ended March 31, 2025
Energy SystemsMotive PowerSpecialtyTotal
Restructuring charges$5,001 $1,575 $398 $6,974 
Exit charges993 4,144 2,317 7,454 
Restructuring and other exit charges$5,994 $5,719 $2,715 $14,428 

Fiscal year ended March 31, 2024
Energy SystemsMotive PowerSpecialtyTotal
Restructuring charges$4,526 $3,445 $35 $8,006 
Exit charges4,312 8,253 7,532 20,097 
Restructuring and other exit charges$8,838 $11,698 $7,567 $28,103 

Fiscal year ended March 31, 2023
Energy SystemsMotive PowerSpecialtyTotal
Restructuring charges$1,318 $327 $42 $1,687 
Exit charges123 12,537 2,092 14,752 
Restructuring and other exit charges$1,441 $12,864 $2,134 $16,439 

A roll-forward of the restructuring reserve is as follows:
 
Balance at March 31, 2022
$1,030 
Accrued1,687 
Costs incurred(2,224)
Foreign currency impact and other(48)
Balance at March 31, 2023
$445 
Accrued8,006 
Costs incurred(6,064)
Foreign currency impact and other21 
Balance at March 31, 2024
$2,408 
Accrued6,974 
Costs incurred(8,292)
Foreign currency impact and other(11)
Balance at March 31, 2025
$1,079 
v3.25.1
Warranty (Tables)
12 Months Ended
Mar. 31, 2025
Guarantees [Abstract]  
Analysis Of Changes In Liability For Product Warranties An analysis of changes in the liability for product warranties is as follows:
 Fiscal year ended March 31,
 202520242023
Balance at beginning of year$60,819 $56,630 $54,978 
Current year provisions32,400 34,110 29,132 
Costs incurred(27,867)(30,160)(25,251)
Foreign currency translation adjustment1,069 239 (2,229)
Balance at end of year$66,421 $60,819 $56,630 
v3.25.1
Other (Income) Expense, Net (Tables)
12 Months Ended
Mar. 31, 2025
Other Income and Expenses [Abstract]  
Summary Of Other (Income) Expense, Net
Other (income) expense, net consists of the following:
 Fiscal year ended March 31,
 202520242023
Cost of Funds Asset Securitization$8,672 $8,776 $2,314 
Non-service components of pension expense(1,259)1,530 315 
Foreign exchange transaction (gains) losses (3,324)(6,053)671 
Other2,904 5,178 4,893 
Total$6,993 $9,431 $8,193 
v3.25.1
Business Segments (Tables)
12 Months Ended
Mar. 31, 2025
Segment Reporting [Abstract]  
Summary Of Financial Information Related To The Company's Business Segments
Summarized financial information related to the Company’s reportable segments at March 31, 2025, 2024 and 2023 and for each of the fiscal years then ended is shown below.
Twelve months ended
March 31, 2025
Energy SystemsMotive PowerSpecialtyTotal
Net Sales by segment to unaffiliated customers$1,531,169 $1,484,117 $593,488 $3,608,774 
Net sales from corporate and other 8,805 
Total Net Sales$3,617,579 
Less:
Other segment items(4)
$1,427,963 $1,251,362 $556,534 $3,244,664 
Segment income$103,206 $232,755 $36,954 $372,915 
Less:
Inventory adjustment relating to exit activities274 — 3,335 3,609 
Restructuring and other exit charges 5,994 5,719 2,715 14,428 
Loss on assets held for sale— 4,634 — 4,634 
Amortization of intangible assets23,620 685 7,500 31,805 
Acquisition expense11 11 2,476 2,498 
Integration costs (96)— 4,086 3,990 
Other673 1,574 110 2,357 
Total operating earnings by segment$72,730 $220,132 $16,732 $309,594 
Corporate and other(3)
$155,092 
Operating earnings(2)
$464,686 
(1)Reportable segments do not record inter-segment revenues and accordingly there are none to report.
(2)The Company does not allocate interest expense or other (income) expense, net, to the reportable segments.
(3)     Corporate and other includes amounts managed on a company-wide basis and not directly allocated to any reportable segments, primarily relating to IRA production tax credits. Also, included are start-up costs for exploration of a new lithium plant as well as start-up operating expenses from the New Ventures operating segment.
(4) Primarily includes cost of sales and operating expenses

Twelve months ended
March 31, 2024
Energy SystemsMotive PowerSpecialtyTotal
Net Sales by segment to unaffiliated customers$1,590,023 $1,456,181 $535,667 $3,581,871 
Net sales from corporate and other — 
Total Net Sales$3,581,871 
Less:
Other segment items(4)
$1,503,068 $1,241,531 $504,301 $3,248,900 
Segment income$86,955 $214,650 $31,366 $332,971 
Less:
Inventory adjustment relating to exit activities17,075 — 3,098 20,173 
Restructuring and other exit charges 8,840 11,697 7,566 28,103 
Impairment of indefinite-lived intangibles13,619 — — 13,619 
Legal proceedings charge, net3,705 — — 3,705 
Amortization of intangible assets24,503 683 2,808 27,994 
Acquisition expense16 185 — 201 
Integration costs 420 — — 420 
Other3,304 847 295 4,446 
Total operating earnings by segment$15,473 $201,238 $17,599 $234,310 
Corporate and other(3)
$117,260 
Operating earnings(2)
$351,570 
(1)Reportable segments do not record inter-segment revenues and accordingly there are none to report.
(2)The Company does not allocate interest expense or other (income) expense, net, to the reportable segments.
(3)     Corporate and other includes amounts managed on a company-wide basis and not directly allocated to any reportable segments, primarily relating to IRA production tax credits. Also, included are start-up costs for exploration of a new lithium plant as well as start-up operating expenses from the New Ventures operating segment.
(4) Primarily includes cost of sales and operating expenses

Twelve months ended
March 31, 2023
Energy SystemsMotive PowerSpecialtyTotal
Net Sales by segment to unaffiliated customers$1,738,195 $1,451,244 $519,140 $3,708,579 
Net sales from corporate and other — 
Total Net Sales$3,708,579 
Less:
Other segment items(4)
$1,647,795 $1,271,272 $478,653 $3,397,720 
Segment income$90,400 $179,972 $40,487 $310,859 
Less:
Inventory adjustment relating to exit activities(211)892 — 681 
Restructuring and other exit charges 1,441 12,864 2,134 16,439 
Impairment of indefinite-lived intangibles100 — 380 480 
Amortization of intangible assets27,383 441 2,923 30,747 
Acquisition expense87 317 — 404 
Integration costs 138 — — 138 
Other487 310 95 892 
Total operating earnings by segment$60,975 $165,148 $34,955 $261,078 
Corporate and other(3)
$17,283 
Operating earnings(2)
$278,361 
(1)Reportable segments do not record inter-segment revenues and accordingly there are none to report.
(2)The Company does not allocate interest expense or other (income) expense, net, to the reportable segments.
(3)     Corporate and other includes amounts managed on a company-wide basis and not directly allocated to any reportable segments, primarily relating to IRA production tax credits. Also, included are start-up costs for exploration of a new lithium plant as well as start-up operating expenses from the New Ventures operating segment.
(4) Primarily includes cost of sales and operating expenses
Fiscal year ended March 31,
202520242023
Capital Expenditures
Energy Systems$39,167 $33,626 $37,249 
Motive Power22,758 17,115 16,373 
Specialty47,016 35,596 35,150 
Other12,097 100 — 
Total$121,038 $86,437 $88,772 
Depreciation and Amortization
Energy Systems$50,443 $49,469 $52,034 
Motive Power23,695 23,690 22,404 
Specialty26,706 18,762 16,715 
Other32 100 — 
Total$100,876 $92,021 $91,153 
The Company's property, plant and equipment by reportable segments as of March 31, 2025 and 2024 are as follows:

March 31, 2025March 31, 2024
Property, plant and equipment, net
Energy Systems$198,841 $189,519 
Motive Power144,076 145,395 
Specialty236,861 197,368 
Other 12,655 168 
Total$592,433 $532,450 
v3.25.1
Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Thousands
12 Months Ended 48 Months Ended
Mar. 31, 2025
USD ($)
segments
Mar. 31, 2024
USD ($)
Mar. 31, 2020
Summary Of Significant Accounting Policies [Line Items]      
Cash and cash equivalents include all highly liquid investments with an original maturity, when purchased, in months 3 months    
Increase (decrease) in cost of goods and income tax payable | $ $ (184,592) $ (136,360)  
Number of operating segments 4    
Number of reportable segments 4    
Restricted Stock and Restricted Stock Units      
Summary Of Significant Accounting Policies [Line Items]      
Percentage of restricted stock units granted, vested per year 25.00%    
Vesting period, in years 4 years    
Market condition-based Share Units (TSR)      
Summary Of Significant Accounting Policies [Line Items]      
Vesting period, in years     3 years
Total shareholder return, return from average grant price, percentage     25.00%
Minimum      
Summary Of Significant Accounting Policies [Line Items]      
Percentage of investment ownership, consolidated 50.00%    
Estimated useful lives of finite-lived assets 3 years    
Minimum | Investments In Affiliates      
Summary Of Significant Accounting Policies [Line Items]      
Percentage of investment ownership, equity method 20.00%    
Minimum | Market condition-based Share Units (TSR)      
Summary Of Significant Accounting Policies [Line Items]      
Total shareholder return, number of awards granted, percentage     0.00%
Minimum | Energy Systems Batteries      
Summary Of Significant Accounting Policies [Line Items]      
Product warranty for a period 1 year    
Minimum | Motive Power Batteries      
Summary Of Significant Accounting Policies [Line Items]      
Product warranty for a period 1 year    
Minimum | Specialty Transportation Batteries      
Summary Of Significant Accounting Policies [Line Items]      
Product warranty for a period 1 year    
Minimum | Building and Improvements      
Summary Of Significant Accounting Policies [Line Items]      
Property, plant, and equipment, useful life 10 years    
Minimum | Machinery and equipment      
Summary Of Significant Accounting Policies [Line Items]      
Property, plant, and equipment, useful life 3 years    
Maximum      
Summary Of Significant Accounting Policies [Line Items]      
Percentage of investment ownership, cost method 20.00%    
Estimated useful lives of finite-lived assets 20 years    
Maximum | Investments In Affiliates      
Summary Of Significant Accounting Policies [Line Items]      
Percentage of investment ownership, equity method 50.00%    
Maximum | Market condition-based Share Units (TSR)      
Summary Of Significant Accounting Policies [Line Items]      
Total shareholder return, number of awards granted, percentage     200.00%
Maximum | Energy Systems Batteries      
Summary Of Significant Accounting Policies [Line Items]      
Product warranty for a period 20 years    
Maximum | Motive Power Batteries      
Summary Of Significant Accounting Policies [Line Items]      
Product warranty for a period 5 years    
Maximum | Specialty Transportation Batteries      
Summary Of Significant Accounting Policies [Line Items]      
Product warranty for a period 4 years    
Maximum | Building and Improvements      
Summary Of Significant Accounting Policies [Line Items]      
Property, plant, and equipment, useful life 33 years    
Maximum | Machinery and equipment      
Summary Of Significant Accounting Policies [Line Items]      
Property, plant, and equipment, useful life 15 years    
v3.25.1
Summary of Significant Accounting Policies - Schedule of Allowance for Doubtful Accounts (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Balance at Beginning of Period $ 8,107 $ 8,775 $ 12,219
Provision for Expected Credit Losses 3,239 1,873 (431)
Write-offs, net of Recoveries and Other (2,671) (2,541) (3,013)
Balance at End of Period $ 8,675 $ 8,107 $ 8,775
v3.25.1
Revenue Recognition - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disaggregation of Revenue [Line Items]      
Net sales $ 3,617,579 $ 3,581,871 $ 3,708,579
Remaining performance obligation 173,979    
Contract with customer, liability, current portion 28,820 27,649  
Contract with customer, liability, noncurrent portion 488 960  
Revenue recognized 11,967 20,166  
Unbilled contracts receivable 71,774 55,363  
Right to recover product 4,300    
Refund liability 7,108    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01      
Disaggregation of Revenue [Line Items]      
Remaining performance obligation 109,125    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01      
Disaggregation of Revenue [Line Items]      
Remaining performance obligation 46,812    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-04-01      
Disaggregation of Revenue [Line Items]      
Remaining performance obligation 18,042    
Transferred over Time      
Disaggregation of Revenue [Line Items]      
Net sales $ 188,270 $ 251,820 $ 244,013
v3.25.1
Revenue Recognition - Remaining Performance Obligation (Details)
$ in Thousands
Mar. 31, 2025
USD ($)
Revenue from Contract with Customer [Abstract]  
Remaining performance obligation $ 173,979
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01  
Revenue from Contract with Customer [Abstract]  
Remaining performance obligation $ 109,125
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01  
Revenue from Contract with Customer [Abstract]  
Remaining performance obligation $ 46,812
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, timing of satisfaction 2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-04-01  
Revenue from Contract with Customer [Abstract]  
Remaining performance obligation $ 18,042
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, timing of satisfaction 3 years
v3.25.1
Leases - Additional Information (Detail)
Mar. 31, 2025
Minimum  
Lessee, Lease, Description [Line Items]  
Contract term 1 year
Maximum  
Lessee, Lease, Description [Line Items]  
Contract term 16 years
v3.25.1
Leases - Balance Sheet Classification (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Leases [Abstract]    
Operating lease right-of-use assets $ 83,635 $ 76,413
Operating lease current liabilities 22,357 19,280
Operating lease non-current liabilities 67,033 61,687
Finance lease right-of-use assets 915 878
Finance lease current liabilities 265 237
Finance lease non-current liabilities $ 592 $ 647
Operating lease, right-of-use asset, statement of financial position Other assets Other assets
Operating lease, liability, current, statement of financial position Accrued expenses Accrued expenses
Operating lease, liability, noncurrent, statement of financial position Other liabilities Other liabilities
Finance lease, right-of-use asset, statement of financial position Property, plant, and equipment, net Property, plant, and equipment, net
v3.25.1
Leases - Components of Lease Expense (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Operating Leases:    
Operating lease cost $ 27,040 $ 28,030
Variable lease cost 6,338 11,669
Short term lease cost 16,573 8,078
Finance Leases:    
Depreciation 282 297
Interest expense 66 57
Total $ 50,299 $ 48,131
v3.25.1
Leases - Additional Information Related to Leases (Detail)
Mar. 31, 2025
Mar. 31, 2024
Operating Leases:    
Weighted average remaining lease term (years) 5 years 1 month 6 days 5 years 6 months
Weighted average discount rate 6.06% 5.38%
Finance Leases:    
Weighted average remaining lease term (years) 3 years 2 months 12 days 3 years 9 months 18 days
Weighted average discount rate 7.07% 7.40%
v3.25.1
Leases - Finance and Operating Lease Maturity Schedules (Detail)
$ in Thousands
Mar. 31, 2025
USD ($)
Finance Leases  
2026 $ 362
2027 343
2028 303
2029 123
2030 10
Thereafter 0
Total undiscounted lease payments 1,141
Present value discount 115
Finance lease liability 1,026
Operating Leases  
2026 27,147
2027 24,158
2028 20,674
2029 14,121
2030 8,243
Thereafter 10,622
Total undiscounted lease payments 104,965
Present value discount 15,577
Operating lease liabilities $ 89,388
v3.25.1
Leases - Supplemental Cash Flow Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows from finance leases $ 64 $ 57
Operating cash flows from operating leases 26,022 27,406
Financing cash flows from finance leases 268 275
Supplemental non-cash information on lease liabilities arising from right-of-use assets:    
Right-of-use assets obtained in exchange for new finance lease liabilities 302 811
Right-of-use assets obtained in exchange for new operating lease liabilities $ 28,184 $ 31,284
v3.25.1
Acquisition - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 26, 2024
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Business Acquisition [Line Items]        
Cash consideration, net of cash and restricted cash acquired   $ 206,374 $ 8,270 $ 0
Goodwill   $ 721,073 $ 682,934 $ 676,715
Bren-Tronics Defense LLC        
Business Acquisition [Line Items]        
Trade Receivables $ 10,325      
Inventory 48,362      
Prepaid and other current assets 1,392      
Property, plant and equipment 14,701      
Other intangible assets 90,500      
Deferred Taxes 1,069      
Other assets 2,003      
Total assets acquired 168,352      
Accounts payable 2,485      
Accrued liabilities 8,078      
Other liabilities 2,236      
Total liabilities assumed 12,799      
Net assets acquired 155,553      
Cash consideration, net of cash and restricted cash acquired 206,374      
Consideration transferred 206,374      
Goodwill $ 50,821      
v3.25.1
Acquisition - Additional Information (Details) - USD ($)
12 Months Ended
Jul. 26, 2024
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Business Acquisition [Line Items]        
Cash consideration, net of cash and restricted cash acquired   $ 206,374,000 $ 8,270,000 $ 0
Bren-Tronics Defense LLC        
Business Acquisition [Line Items]        
Cash consideration, net of cash and restricted cash acquired $ 206,374,000      
Trade Receivables 10,325,000      
Bren-Tronics Defense LLC | Trademarks        
Business Acquisition [Line Items]        
Acquired intangible assets $ 4,200      
Acquired finite-lived intangible assets, weighted average useful life (in years) 6 years      
Bren-Tronics Defense LLC | Customer relationships        
Business Acquisition [Line Items]        
Acquired intangible assets $ 63,100      
Acquired finite-lived intangible assets, weighted average useful life (in years) 13 years      
Bren-Tronics Defense LLC | Technology-Based Intangible Assets [Member]        
Business Acquisition [Line Items]        
Acquired intangible assets $ 23,200      
Acquired finite-lived intangible assets, weighted average useful life (in years) 12 years      
v3.25.1
Accounts Receivable - Schedule of Accounts Receivable (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Accounts receivable $ 606,617 $ 532,832
Allowance for doubtful accounts 8,675 8,107
Accounts receivable, net $ 597,942 $ 524,725
v3.25.1
Accounts Receivable - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Receivables [Abstract]    
Accounts receivable, selling, maximum amount $ 150,000  
Accounts receivable, fee, basis spread on sold receivable balance 0.85%  
Accounts receivable sold to financial institution $ 775,236 $ 710,746
Accounts receivable sold to financial institution, net proceeds 775,236 710,746
Accounts receivable sold to financial institution, proceeds collected 775,236 710,746
Accounts receivables, collateralized $ 388,030 $ 341,223
v3.25.1
Inventories - Summary of Inventories (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Inventory Disclosure [Abstract]    
Raw materials $ 296,365 $ 284,773
Work-in-process 125,459 115,191
Finished goods 318,170 297,734
Total $ 739,994 $ 697,698
v3.25.1
Property, Plant, and Equipment - Summary of Property, Plant, and Equipment (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, including finance lease right-of-use asset, gross $ 1,431,561 $ 1,335,945
Less accumulated depreciation (839,128) (803,495)
Total 592,433 532,450
Land, buildings, and improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, including finance lease right-of-use asset, gross 322,058 313,258
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, including finance lease right-of-use asset, gross 994,003 930,858
Construction in progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, including finance lease right-of-use asset, gross $ 115,500 $ 91,829
v3.25.1
Property, Plant, and Equipment - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Property, Plant and Equipment [Abstract]      
Depreciation expense $ 69,071 $ 64,028 $ 60,405
Interest capitalized $ 4,544 $ 1,268 $ 857
v3.25.1
Goodwill and Other Intangible Assets - Schedule of Company's Other Intangible Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Intangible Assets [Line Items]    
Gross Amount, Total $ 624,491 $ 536,665
Accumulated Amortization ,Total (249,061) (217,258)
Net Amount ,Total 375,430 319,407
Trademarks    
Intangible Assets [Line Items]    
Indefinite-lived intangible assets, Gross Amount 129,210 131,167
Finite-lived intangible assets, Gross Amount 14,815 9,554
Indefinite-lived intangible assets, Accumulated Amortization (953) (953)
Finite-lived intangible assets, Accumulated Amortization (9,995) (8,482)
Indefinite-lived intangible assets, Net Amount 128,257 130,214
Finite-lived intangible assets, Net Amount 4,820 1,072
Customer relationships    
Intangible Assets [Line Items]    
Finite-lived intangible assets, Gross Amount 356,800 295,215
Finite-lived intangible assets, Accumulated Amortization (168,932) (147,833)
Finite-lived intangible assets, Net Amount 187,868 147,382
Non-compete    
Intangible Assets [Line Items]    
Finite-lived intangible assets, Gross Amount 2,825 2,825
Finite-lived intangible assets, Accumulated Amortization (2,825) (2,825)
Finite-lived intangible assets, Net Amount 0 0
Technology    
Intangible Assets [Line Items]    
Finite-lived intangible assets, Gross Amount 119,645 96,708
Finite-lived intangible assets, Accumulated Amortization (65,160) (55,969)
Finite-lived intangible assets, Net Amount 54,485 40,739
Licenses    
Intangible Assets [Line Items]    
Finite-lived intangible assets, Gross Amount 1,196 1,196
Finite-lived intangible assets, Accumulated Amortization (1,196) (1,196)
Finite-lived intangible assets, Net Amount $ 0 $ 0
v3.25.1
Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Indefinite-lived Intangible Assets [Line Items]      
Amortization of intangible assets $ 31,805 $ 27,993 $ 30,748
Expected amortization expense, 2024 33,371    
Expected amortization expense, 2025 32,668    
Expected amortization expense, 2026 32,176    
Expected amortization expense, 2027 30,308    
Expected amortization expense, 2028 25,202    
Impairment of indefinite-lived intangibles 0 13,619 $ 480
Estimated tax-deductible goodwill $ 122,904 78,147  
Trademarks | EMEA      
Indefinite-lived Intangible Assets [Line Items]      
Impairment of indefinite-lived intangibles   $ 13,619  
v3.25.1
Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill by Business Segment (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Goodwill [Roll Forward]    
Balance at beginning of year $ 682,934 $ 676,715
Foreign currency translation adjustment (12,682) 1,829
Acquisitions 50,821 4,390
Balance at end of year 721,073 682,934
Energy Systems    
Goodwill [Roll Forward]    
Balance at beginning of year 259,011 258,204
Foreign currency translation adjustment (13,264) 807
Acquisitions 0 0
Balance at end of year 245,747 259,011
Motive Power    
Goodwill [Roll Forward]    
Balance at beginning of year 326,718 321,530
Foreign currency translation adjustment 328 798
Acquisitions 0 4,390
Balance at end of year 327,046 326,718
Specialty    
Goodwill [Roll Forward]    
Balance at beginning of year 97,205 96,981
Foreign currency translation adjustment 254 224
Acquisitions 50,821 0
Balance at end of year $ 148,280 $ 97,205
v3.25.1
Prepaid and Other Current Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Contract assets $ 71,774 $ 55,363
Prepaid non-income taxes 21,357 19,509
Non-trade receivables 6,674 4,124
Prepaid income taxes 246,816 94,866
Other 62,126 53,087
Total $ 408,747 $ 226,949
v3.25.1
Accrued Expenses (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Payables and Accruals [Abstract]    
Payroll and benefits $ 90,956 $ 84,734
Accrued selling expenses 48,098 46,738
Contract liabilities 28,821 27,649
Warranty 28,090 26,304
Operating lease liabilities 22,357 19,280
Income taxes payable 22,110 16,716
Freight 19,908 16,549
VAT and other non-income taxes 14,649 17,595
Interest 9,025 9,201
Other 56,593 58,954
Total $ 340,607 $ 323,720
v3.25.1
Debt - Long Term Debt (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Debt Instrument [Line Items]    
Long-term debt gross $ 1,090,000 $ 810,000
Unamortized debt issuance expense 6,459 8,035
Long-term debt, net of unamortized issuance costs 1,083,541 801,965
Senior Notes    
Debt Instrument [Line Items]    
Long-term debt 600,000 600,000
Unamortized debt issuance expense 5,276 6,064
Line Of Credit And Secured Debt | Fourth Amended Credit Facility, due 2026 | Secured Debt    
Debt Instrument [Line Items]    
Incremental term loan commitment 490,000 210,000
Unamortized debt issuance expense $ 1,183 $ 1,971
v3.25.1
Debt - Additional Information (Detail)
3 Months Ended 12 Months Ended
Jan. 11, 2024
USD ($)
Dec. 11, 2019
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Oct. 03, 2021
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Mar. 31, 2023
USD ($)
Mar. 31, 2019
USD ($)
Oct. 02, 2022
USD ($)
Oct. 03, 2021
CAD ($)
Mar. 31, 2019
CAD ($)
Mar. 31, 2018
USD ($)
Debt Instrument [Line Items]                          
Repayments of senior debt           $ 0 $ 0 $ 300,000,000          
Loss on extinguishment of debt     $ 753,000 $ 753,000                  
Weighted-average interest rate     4.50% 5.20%   4.50% 5.20%            
Short term borrowing outstanding amount     $ 28,502,000 $ 30,444,000   $ 28,502,000 $ 30,444,000            
Short-term debt, weighted-average interest rates     4.70% 6.70%   4.70% 6.70%            
Amortization expense included in interest expense           $ 0 $ 1,697,000 1,964,000          
Deferred financing fees, net of accumulated amortization     $ 6,459,000 $ 8,035,000   6,459,000 8,035,000            
Senior Notes                          
Debt Instrument [Line Items]                          
Long-term debt     600,000,000 600,000,000   600,000,000 600,000,000            
Line of Credit                          
Debt Instrument [Line Items]                          
Available lines of credit     652,552,000 938,334,000   652,552,000 938,334,000            
Outstanding amount     87,982,000 90,866,000   87,982,000 90,866,000            
Convertible Notes Payable                          
Debt Instrument [Line Items]                          
Stand by letters of credit     5,584,000 3,919,000   5,584,000 3,919,000            
2027 Notes | Senior Notes                          
Debt Instrument [Line Items]                          
Long-term debt   $ 300,000,000                      
Interest rate of debt instrument   4.375%                      
Proceeds from debt, net   $ 296,250,000                      
2032 Notes | Senior Notes                          
Debt Instrument [Line Items]                          
Long-term debt $ 300,000,000                        
Interest rate of debt instrument 6.625%                        
Proceeds from debt, net $ 297,000                        
2017 Revolver borrowings | Secured Debt                          
Debt Instrument [Line Items]                          
Face value of debt instrument                         $ 150,000,000
Change in face amount                 $ 299,105,000        
2017 Revolver borrowings | Revolving Credit Facility | Line of Credit                          
Debt Instrument [Line Items]                          
Maximum borrowing capacity                         $ 600,000,000
Amended 2017 Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Maximum borrowing capacity                 449,105,000        
Proceeds from senior notes       86,488,000                  
Repayments of senior debt       86,488,000                  
Amended 2017 Term Loan | Term Loan                          
Debt Instrument [Line Items]                          
Maximum borrowing capacity                 99,105,000     $ 133,050,000  
Amended 2017 Revolver | Line of Credit                          
Debt Instrument [Line Items]                          
Maximum borrowing capacity                 700,000,000        
Amended 2017 Revolver | Revolving Credit Facility | Line of Credit                          
Debt Instrument [Line Items]                          
Change in borrowing capacity                 $ 100,000,000        
Second Amended Term Loan, Canadian Dollars | Secured Debt                          
Debt Instrument [Line Items]                          
Face value of debt instrument         $ 84,229,000           $ 106,440,000    
Second Amended Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Face value of debt instrument         130,000,000                
Change in face amount         (150,000,000)                
Proceeds from senior notes       188,750,000                  
Available lines of credit     110,000,000     110,000,000              
Repayments of senior notes       $ 188,750,000                  
Second Amended Revolver | Secured Debt                          
Debt Instrument [Line Items]                          
Available lines of credit     280,000     280,000              
Second Amended Revolver | Revolving Credit Facility | Line of Credit                          
Debt Instrument [Line Items]                          
Maximum borrowing capacity         850,000,000                
Change in borrowing capacity         $ 150,000,000                
Second Amended Credit Facility | Line Of Credit And Secured Debt                          
Debt Instrument [Line Items]                          
Payments of debt issuance costs           4,412,000              
2038 Notes                          
Debt Instrument [Line Items]                          
Interest paid           48,806,000 $ 48,080,000 58,368,000          
Third Amended Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Long-term debt               300,000,000          
Maximum borrowing capacity                   $ 300,000,000      
Deferred costs and other assets               1,096,000          
Available lines of credit     $ 100,000,000     $ 100,000,000              
Debt issuance costs               $ 1,161,000          
Third Amended Term Loan | Minimum | Secured Debt                          
Debt Instrument [Line Items]                          
Line of credit facility, commitment fees percentage           0.175%              
Third Amended Term Loan | Maximum | Secured Debt                          
Debt Instrument [Line Items]                          
Line of credit facility, commitment fees percentage           0.35%              
Fourth Amended Credit Facility                          
Debt Instrument [Line Items]                          
Debt instrument, covenant, leverage ratio     4.50     4.50              
Debt instrument, covenant, leverage ratio     4.00     4.00              
Fourth Amended Credit Facility | Line Of Credit And Secured Debt                          
Debt Instrument [Line Items]                          
Percentage of capital stock collateralizing debt           65.00%              
Fourth Amended Credit Facility | Minimum                          
Debt Instrument [Line Items]                          
Debt instrument, covenant, leverage ratio     4.00     4.00              
Debt instrument, covenant, leverage ratio     3.50     3.50              
Fourth Amended Credit Facility | Maximum                          
Debt Instrument [Line Items]                          
Debt instrument, covenant, leverage ratio     4.25     4.25              
Consideration transferred           $ 250,000,000              
Debt instrument, covenant, leverage ratio     4.25     4.25              
Fourth Amended Credit Facility | Revolving Credit Facility | Line Of Credit And Secured Debt                          
Debt Instrument [Line Items]                          
Optional increase in line of credit maximum borrowing capacity     $ 350,000,000     $ 350,000,000              
Federal Funds Effective Rate | Second Amended Credit Facility | Line Of Credit And Secured Debt                          
Debt Instrument [Line Items]                          
Interest at a floating rate           0.50%              
Federal Funds Effective Rate | Third Amended Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Interest at a floating rate           0.50%              
Eurocurrency Base Rate | Second Amended Credit Facility | Line Of Credit And Secured Debt                          
Debt Instrument [Line Items]                          
Interest at a floating rate           1.00%              
Eurocurrency Base Rate | Third Amended Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Interest at a floating rate           1.00%              
Canadian Dollar Offered Rate (CDOR) | Second Amended Credit Facility | Line Of Credit And Secured Debt                          
Debt Instrument [Line Items]                          
Interest at a floating rate           0.50%              
Secured Overnight Financing Rate (SOFR) | Second Amended Credit Facility | Line Of Credit And Secured Debt                          
Debt Instrument [Line Items]                          
Interest at a floating rate           1.25%              
Secured Overnight Financing Rate (SOFR) | Second Amended Credit Facility | Minimum | Line Of Credit And Secured Debt                          
Debt Instrument [Line Items]                          
Interest at a floating rate           1.125%              
Secured Overnight Financing Rate (SOFR) | Second Amended Credit Facility | Maximum | Line Of Credit And Secured Debt                          
Debt Instrument [Line Items]                          
Interest at a floating rate           2.25%              
Secured Overnight Financing Rate (SOFR) | Third Amended Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Interest at a floating rate           0.10%              
Secured Overnight Financing Rate (SOFR) | Third Amended Term Loan | Secured Debt | Net Leverage Ratio                          
Debt Instrument [Line Items]                          
Interest at a floating rate           1.50%              
Secured Overnight Financing Rate (SOFR) | Third Amended Term Loan | Minimum | Secured Debt                          
Debt Instrument [Line Items]                          
Interest at a floating rate           1.375%              
Secured Overnight Financing Rate (SOFR) | Third Amended Term Loan | Maximum | Secured Debt                          
Debt Instrument [Line Items]                          
Interest at a floating rate           2.50%              
Base Rate | Third Amended Term Loan | Minimum | Secured Debt                          
Debt Instrument [Line Items]                          
Interest at a floating rate           0.375%              
Base Rate | Third Amended Term Loan | Maximum | Secured Debt                          
Debt Instrument [Line Items]                          
Interest at a floating rate           1.50%              
Debt Instrument, Redemption, Period One | 2027 Notes | Senior Notes                          
Debt Instrument [Line Items]                          
Redemption price, percentage   100.00%                      
Debt Instrument, Redemption, Period One | 2032 Notes | Senior Notes                          
Debt Instrument [Line Items]                          
Redemption price, percentage 100.00%                        
Debt Instrument, Redemption, Period One | Second Amended Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Periodic payment           $ 2,607,000              
Debt Instrument, Redemption, Period One | Third Amended Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Periodic payment           3,750,000              
Debt Instrument, Redemption, Period Two | 2027 Notes | Senior Notes                          
Debt Instrument [Line Items]                          
Redemption price, percentage   100.00%                      
Debt Instrument, Redemption, Period Two | 2032 Notes | Senior Notes                          
Debt Instrument [Line Items]                          
Redemption price, percentage 100.00%                        
Debt Instrument, Redemption, Period Two | Second Amended Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Periodic payment           3,911,000              
Debt Instrument, Redemption, Period Two | Third Amended Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Periodic payment           5,625,000              
Debt Instrument, Redemption, Period Three | 2027 Notes | Senior Notes                          
Debt Instrument [Line Items]                          
Redemption price, percentage   101.00%                      
Debt Instrument, Redemption, Period Three | 2032 Notes | Senior Notes                          
Debt Instrument [Line Items]                          
Redemption price, percentage 106.625%                        
Debt instrument, redemption price, percentage of principal amount redeemed 40.00%                        
Debt Instrument, Redemption, Period Three | Second Amended Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Periodic payment           5,215,000              
Debt Instrument, Redemption, Period Three | Third Amended Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Periodic payment           7,500,000              
Debt Instrument, Redemption, Period Four | 2032 Notes | Senior Notes                          
Debt Instrument [Line Items]                          
Redemption price, percentage 101.00%                        
Debt Instrument, Redemption, Period Four | Second Amended Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Periodic payment           156,448,000              
Debt Instrument, Redemption, Period Four | Third Amended Term Loan | Secured Debt                          
Debt Instrument [Line Items]                          
Periodic payment           $ 232,500,000              
v3.25.1
Other Liabilities (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Other Liabilities Disclosure [Abstract]    
Operating lease liabilities $ 67,033 $ 61,687
Warranty 38,331 34,515
Long-term interest rate swaps 33,002 19,167
Pension 25,307 25,512
Liability for uncertain tax positions 3,335 3,300
Contract liabilities 2,801 959
Other 5,109 6,742
Total $ 174,918 $ 151,882
v3.25.1
Fair Value of Financial Instruments - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Recurring - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives $ (31,593) $ (17,301)
Lead forward contracts    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives (225) (835)
Foreign currency forward contracts    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives 1,629 5
Net investment hedges    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives (33,002) (19,167)
Interest rate swaps    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives 5 2,696
Quoted Price In Active Markets for Identical Assets (Level 1)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives 0 0
Quoted Price In Active Markets for Identical Assets (Level 1) | Lead forward contracts    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives 0 0
Quoted Price In Active Markets for Identical Assets (Level 1) | Foreign currency forward contracts    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives 0 0
Quoted Price In Active Markets for Identical Assets (Level 1) | Net investment hedges    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives 0 0
Quoted Price In Active Markets for Identical Assets (Level 1) | Interest rate swaps    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives 0
Significant Other Observable Inputs (Level 2)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives (31,593) (17,301)
Significant Other Observable Inputs (Level 2) | Lead forward contracts    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives (225) (835)
Significant Other Observable Inputs (Level 2) | Foreign currency forward contracts    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives 1,629 5
Significant Other Observable Inputs (Level 2) | Net investment hedges    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives (33,002) (19,167)
Significant Other Observable Inputs (Level 2) | Interest rate swaps    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives 5 2,696
Significant Unobservable Inputs (Level 3)    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives 0 0
Significant Unobservable Inputs (Level 3) | Lead forward contracts    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives 0 0
Significant Unobservable Inputs (Level 3) | Foreign currency forward contracts    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives 0 0
Significant Unobservable Inputs (Level 3) | Net investment hedges    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives 0 0
Significant Unobservable Inputs (Level 3) | Interest rate swaps    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total derivatives $ 0
v3.25.1
Fair Value of Financial Instruments - Additional Information (Detail)
$ in Thousands
3 Months Ended 12 Months Ended
Nov. 08, 2023
USD ($)
Jan. 02, 2023
USD ($)
Mar. 31, 2025
USD ($)
Jan. 03, 2021
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Mar. 31, 2023
USD ($)
Jan. 03, 2022
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Loss on assets held for sale         $ 4,634 $ 13,619 $ 480  
Loss on assets held for sale         4,634 $ 0 $ 0  
Closure of Facility in Hagen, Germany                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair value of fixed assets     $ 2,113 $ 14,456 2,113      
Fixed asset impairment       $ 3,975        
Assets held for sale     7,000   $ 7,000      
Loss on assets held for sale     (4,867)          
Closure Of Facility In Ooltewah, Tennessee | Fixed Asset Write-Off                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Restructuring charges     $ 7,300          
2027 Notes                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Trading of convertible notes, face value, disclosed as a percentage     96.00%   96.00% 94.00%    
2032 Notes                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Trading of convertible notes, face value, disclosed as a percentage     101.00%   101.00% 100.00%    
Trademarks                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair value of fixed assets $ 880              
Loss on assets held for sale $ 6,020              
Trademarks | EMEA                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Fair value of fixed assets           $ 7,599   $ 6,900
Loss on assets held for sale   $ 480            
Royalty Rate | Trademarks | Maximum                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Measurement inputs 0.015              
Royalty Rate | Trademarks | EMEA | Maximum                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Measurement inputs               0.015
Discount Rate | Trademarks | Minimum                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Measurement inputs 0.245              
Discount Rate | Trademarks, One | EMEA | Minimum                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Measurement inputs               0.240
v3.25.1
Fair Value of Financial Instruments - Carrying Amounts and Estimated Fair Values of Company Financial Instruments (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other liabilities Other liabilities
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative Asset $ 0 $ 0
Senior Notes 600,000 600,000
Derivative Liability (31,593) (17,301)
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative Asset 0 0
Senior Notes 591,420 582,750
Derivative Liability $ (31,593) $ (17,301)
v3.25.1
Derivative Financial Instruments - Additional Information (Detail)
$ in Thousands, lb in Millions
12 Months Ended
Sep. 29, 2022
USD ($)
Mar. 31, 2025
USD ($)
lb
Mar. 31, 2024
USD ($)
lb
Mar. 31, 2023
USD ($)
Dec. 24, 2024
USD ($)
Dec. 23, 2024
USD ($)
Oct. 03, 2021
USD ($)
Derivatives, Fair Value [Line Items]              
Payments for (proceeds from) other investing activities $ 43,384 $ 0 $ 0 $ 43,384      
Derivative gain (loss) to be recorded in income within 12 months, before tax   12,569          
Lead forward contracts              
Derivatives, Fair Value [Line Items]              
Total purchase price of derivative   63,841 49,977        
Designated as Hedging Instrument | Cross currency fixed interest rate swaps              
Derivatives, Fair Value [Line Items]              
Notional amount 300,000            
Designated as Hedging Instrument | Cross Currency Fixed Interest Rate Contract              
Derivatives, Fair Value [Line Items]              
Notional amount $ 150,000       $ 150 $ 150 $ 150
Designated as Hedging Instrument | Interest Rate Swap, Fixed-Rate Basis              
Derivatives, Fair Value [Line Items]              
Notional amount   $ 200,000 $ 200,000        
Designated as Hedging Instrument | Lead forward contracts              
Derivatives, Fair Value [Line Items]              
Hedge forward contracts, maturity   1 year          
Derivative, nonmonetary notional amount, mass | lb   70.0 53.0        
Designated as Hedging Instrument | Foreign currency forward contracts              
Derivatives, Fair Value [Line Items]              
Derivative, term (not extending beyond)   1 year          
Notional amount   $ 39,196 $ 46,159        
Derivatives Not Designated as Hedging Instruments | Foreign currency forward contracts              
Derivatives, Fair Value [Line Items]              
Notional amount   $ 63,146 $ 69,319        
v3.25.1
Derivative Financial Instruments - Fair Value of Derivative Instruments (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Designated as Hedging Instrument | Cash Flow Hedging    
Derivatives, Fair Value [Line Items]    
Derivatives assets, Fair Value $ 5 $ 3,092
Derivatives liabilities, Fair Value 515 835
Designated as Hedging Instrument | Cash Flow Hedging | Cross currency fixed interest rate swaps | Other liabilities    
Derivatives, Fair Value [Line Items]    
Derivatives liabilities, Fair Value 0 0
Designated as Hedging Instrument | Net investment hedges    
Derivatives, Fair Value [Line Items]    
Derivatives assets, Fair Value 0 0
Derivatives liabilities, Fair Value 33,002 19,167
Designated as Hedging Instrument | Net investment hedges | Cross currency fixed interest rate swaps | Other liabilities    
Derivatives, Fair Value [Line Items]    
Derivatives liabilities, Fair Value 33,002 19,167
Designated as Hedging Instrument | Lead forward contracts | Cash Flow Hedging | Prepaid and other current assets    
Derivatives, Fair Value [Line Items]    
Derivatives assets, Fair Value 0 0
Designated as Hedging Instrument | Lead forward contracts | Cash Flow Hedging | Accrued expenses    
Derivatives, Fair Value [Line Items]    
Derivatives liabilities, Fair Value 225 835
Designated as Hedging Instrument | Foreign currency forward contracts | Cash Flow Hedging | Prepaid and other current assets    
Derivatives, Fair Value [Line Items]    
Derivatives assets, Fair Value 0 396
Designated as Hedging Instrument | Foreign currency forward contracts | Cash Flow Hedging | Accrued expenses    
Derivatives, Fair Value [Line Items]    
Derivatives liabilities, Fair Value 290 0
Designated as Hedging Instrument | Interest rate swaps | Cash Flow Hedging | Prepaid and other current assets    
Derivatives, Fair Value [Line Items]    
Derivatives assets, Fair Value 5 2,696
Derivatives Not Designated as Hedging Instruments    
Derivatives, Fair Value [Line Items]    
Derivatives assets, Fair Value 1,919 0
Derivatives liabilities, Fair Value 0 391
Derivatives Not Designated as Hedging Instruments | Lead forward contracts | Prepaid and other current assets    
Derivatives, Fair Value [Line Items]    
Derivatives assets, Fair Value 0 0
Derivatives Not Designated as Hedging Instruments | Lead forward contracts | Accrued expenses    
Derivatives, Fair Value [Line Items]    
Derivatives liabilities, Fair Value 0 0
Derivatives Not Designated as Hedging Instruments | Foreign currency forward contracts | Prepaid and other current assets    
Derivatives, Fair Value [Line Items]    
Derivatives assets, Fair Value 1,919 0
Derivatives Not Designated as Hedging Instruments | Foreign currency forward contracts | Accrued expenses    
Derivatives, Fair Value [Line Items]    
Derivatives liabilities, Fair Value 0 391
Derivatives Not Designated as Hedging Instruments | Interest rate swaps | Prepaid and other current assets    
Derivatives, Fair Value [Line Items]    
Derivatives assets, Fair Value $ 0 $ 0
v3.25.1
Derivative Financial Instruments - Derivatives Effect on Statements of Income (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Designated as Hedging Instrument      
Derivative Instruments, Gain (Loss) [Line Items]      
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) $ (3,053) $ 8,200 $ (3,196)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) (1,717) 9,057 (1,176)
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) (9,422) (2,695) 29,201
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) 4,413 713 3,587
Derivatives Not Designated as Hedging Instruments      
Derivative Instruments, Gain (Loss) [Line Items]      
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) 3,136 (846) 1,182
Lead forward contracts | Designated as Hedging Instrument | Cost of goods sold      
Derivative Instruments, Gain (Loss) [Line Items]      
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) (3,703) (455) (3,883)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) (4,880) 5,388 (3,765)
Foreign currency forward contracts | Designated as Hedging Instrument | Cost of goods sold      
Derivative Instruments, Gain (Loss) [Line Items]      
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) 1,475 1,740 1,849
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) 1,297 612 2,589
Foreign currency forward contracts | Derivatives Not Designated as Hedging Instruments | Other (income) expense, net      
Derivative Instruments, Gain (Loss) [Line Items]      
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) 3,136 (846) 1,182
Cross currency fixed interest rate swaps | Designated as Hedging Instrument | Interest expense      
Derivative Instruments, Gain (Loss) [Line Items]      
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) (9,422) (2,695) 29,201
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) 4,413 713 3,587
Interest rate swaps | Designated as Hedging Instrument | Interest expense      
Derivative Instruments, Gain (Loss) [Line Items]      
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion) (825) 6,915 (1,162)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) $ 1,866 $ 3,057 $ 0
v3.25.1
Derivative Financial Instruments - Effect of Derivative Instruments (Detail) - Derivatives Not Designated as Hedging Instruments - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Derivatives, Fair Value [Line Items]      
Derivatives Not Designated as Hedging Instruments $ 3,136 $ (846) $ 1,182
Other (income) expense, net | Foreign currency forward contracts      
Derivatives, Fair Value [Line Items]      
Derivatives Not Designated as Hedging Instruments $ 3,136 $ (846) $ 1,182
v3.25.1
Income Taxes - Schedule of Income Tax Expense (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Current:      
Federal $ 39,021 $ 21,785 $ 21,203
State 11,147 3,252 5,654
Foreign 24,599 27,396 23,208
Total current income tax expense 74,767 52,433 50,065
Deferred income tax (benefit) expense      
Federal (6,000) (25,008) (18,370)
State (1,446) (3,564) (2,534)
Foreign (24,479) (772) 5,668
Total deferred income tax (benefit) expense (31,925) (29,344) (15,236)
Total income tax expense $ 42,842 $ 23,089 $ 34,829
v3.25.1
Income Taxes - Schedule of Earning Before Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Income Tax Disclosure [Abstract]      
United States $ 201,332 $ 99,230 $ 38,703
Foreign 205,245 192,955 171,936
Earnings before income taxes $ 406,577 $ 292,185 $ 210,639
v3.25.1
Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Income Tax Contingency [Line Items]        
Income taxes paid $ 40,410,000 $ 28,810,000 $ 46,309,000  
Net operating loss carryforwards carried forward indefinitely 110,599,000      
Net operating loss carryforwards subject to expiration 44,660,000      
Valuation allowance 25,594,000 35,754,000 31,172,000 $ 31,017,000
Increase (decrease) in deferred tax asset (5,890,000) (2,267,000) (1,913,000)  
Income tax expense (benefit) $ 42,842,000 $ 23,089,000 $ 34,829,000  
Effective income tax rates 10.50% 7.90% 16.50%  
Foreign pre-tax income $ 205,245,000 $ 192,955,000 $ 171,936,000  
Foreign pre-tax income, percent 0.10% 13.80% 16.80%  
Tax rate of Swiss subsidiary (13.00%) 9.00% 7.00%  
Blended rate 21.00% 21.00% 21.00%  
Undistributed earnings of foreign subsidiaries $ 1,342,000,000 $ 1,352,000,000    
Unrecognized tax benefits 2,880,000 2,845,000 $ 3,495,000 $ 4,770,000
Estimated change in unrecognized tax benefit in fiscal 2015 668,000      
Tax related interest and penalties 455,000 455,000    
Swiss Federal Tax Administration (FTA)        
Income Tax Contingency [Line Items]        
Income tax expense (benefit) 2,500,000      
Federal        
Income Tax Contingency [Line Items]        
United States federal net operating loss carryforwards 359,000      
Valuation allowance 0 0    
Foreign        
Income Tax Contingency [Line Items]        
United States federal net operating loss carryforwards 155,259,000      
Valuation allowance 25,126,000 35,219,000    
Increase (decrease) in deferred tax asset (10,093,000)      
Foreign | Increase to Income Tax Expense (Benefit)        
Income Tax Contingency [Line Items]        
Increase (decrease) in deferred tax asset (4,203,000)      
Foreign | Purchase Accounting Adjustment        
Income Tax Contingency [Line Items]        
Increase (decrease) in deferred tax asset (5,890,000)      
State        
Income Tax Contingency [Line Items]        
United States federal net operating loss carryforwards 18,806,000      
Valuation allowance $ 468,000 $ 535,000    
v3.25.1
Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Deferred tax assets:        
Accounts receivable $ 278 $ 309    
Inventories 13,154 13,472    
Net operating loss carryforwards 44,442 51,005    
Lease liabilities 21,016 20,081    
Capitalized R&D Expenditures 48,856 32,740    
Accrued expenses 42,909 35,132    
Other assets 22,080 29,079    
Gross deferred tax assets 192,735 181,818    
Less valuation allowance (25,594) (35,754) $ (31,172) $ (31,017)
Total deferred tax assets 167,141 146,064    
Deferred tax liabilities:        
Property, plant and equipment 49,025 45,493    
Lease Right-of-use assets 21,016 20,071    
Intangible assets 32,332 56,726    
Other liabilities 7,616 4,560    
Total deferred tax liabilities 109,989 126,850    
Net deferred tax assets (liabilities) $ 57,152 $ 19,214    
v3.25.1
Income Taxes - Schedule of Valuation Allowance (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Deferred Tax Asset, Valuation Allowance [Roll Forward]      
Balance at Beginning of Period $ 35,754 $ 31,172 $ 31,017
Additions Charged to Expense 4,949 9,463 2,654
Valuation Allowance Reversal (9,219) (2,614) (586)
Other (5,890) (2,267) (1,913)
Balance at End of Period $ 25,594 $ 35,754 $ 31,172
v3.25.1
Income Taxes - Reconciliation of Income Taxes at Statutory Rate (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Income Tax Disclosure [Abstract]      
United States statutory income tax expense $ 85,381 $ 61,358 $ 44,233
State income taxes, net of federal effect 7,361 (995) 1,714
Nondeductible expenses and other 14,135 3,833 6,028
Net effect of GILTI, FDII, BEAT 3,322 3,313 2,457
Effect of foreign operations (14,074) (17,475) (12,978)
Valuation allowance (4,270) 6,849 2,068
Research and Development Credit (5,652) (5,158) (5,063)
AMPC Impact (38,764) (28,636) (3,630)
Tax Act (4,597) 0 0
Total income tax expense $ 42,842 $ 23,089 $ 34,829
v3.25.1
Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Reconciliation of Unrecognized Tax Benefits      
Balance at beginning of year $ 2,845 $ 3,495 $ 4,770
Increases related to current year tax positions 630    
Increases related to current year tax positions   (2) (24)
Increases related to prior year tax positions   0  
Increases related to prior year tax positions 0   1
Decreases related to prior tax positions 0 (129) 0
Decreases related to prior year tax positions settled 0 0 (77)
Lapse of statute of limitations (595) (519) (1,221)
Balance at end of year $ 2,880 $ 2,845 $ 3,495
v3.25.1
Retirement Plans - Net Periodic Pension Costs (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Settlement gain $ 1,069 $ (284) $ (438)
United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0 0 0
Interest cost 491 657 582
Expected return on plan assets (141) (424) (455)
Amortization and deferral (61) 0 0
Settlement gain (1,548) 0 0
Net periodic benefit cost (1,259) 233 127
International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 954 884 918
Interest cost 2,501 2,215 1,715
Expected return on plan assets (1,421) (1,244) (2,005)
Amortization and deferral 582 326 478
Settlement gain 0 0 0
Net periodic benefit cost $ 2,616 $ 2,181 $ 1,106
v3.25.1
Retirement Plans - Change in Projected Benefit Obligations and Change in Plan Assets (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
United States Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at the beginning of the period $ 13,313 $ 14,056  
Service cost 0 0 $ 0
Interest cost 491 657 582
Benefits paid, inclusive of plan expenses (635) (865)  
Plan curtailments and settlements (13,338) 0  
Plan combinations 0 0  
Actuarial (gains) losses 169 (535)  
Foreign currency translation adjustment 0  
Benefit obligation at the end of the period 0 13,313 14,056
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at the beginning of the period 15,153 13,975  
Actual return on plan assets (23) 2,043  
Employer contributions 0 0  
Benefits paid, inclusive of plan expenses (635) (865)  
Plan curtailments and settlements (13,338) 0  
Foreign currency translation adjustment 0 0  
Fair value of plan assets at the end of the period 1,157 15,153 13,975
Funded status surplus (deficit) 1,157 1,840  
International Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at the beginning of the period 55,806 51,718  
Service cost 954 884 918
Interest cost 2,501 2,215 1,715
Benefits paid, inclusive of plan expenses (2,759) (2,353)  
Plan curtailments and settlements 0 0  
Plan combinations 0 (1,835)  
Actuarial (gains) losses (3,601) 633  
Foreign currency translation adjustment 901 874  
Benefit obligation at the end of the period 53,802 55,806 51,718
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at the beginning of the period 32,563 40,104  
Actual return on plan assets (2,075) (7,717)  
Employer contributions 1,720 1,655  
Benefits paid, inclusive of plan expenses (2,759) (2,353)  
Plan curtailments and settlements 0 0  
Foreign currency translation adjustment 715 874  
Fair value of plan assets at the end of the period 30,164 32,563 $ 40,104
Funded status surplus (deficit) $ (23,638) $ (23,243)  
v3.25.1
Retirement Plans - Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan amounts recognized in balance sheet $ (22,481) $ (21,403)
Non-current assets    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan amounts recognized in balance sheet 4,409 5,606
Accrued expenses    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan amounts recognized in balance sheet (1,583) (1,497)
Other liabilities    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan amounts recognized in balance sheet $ (25,307) $ (25,512)
v3.25.1
Retirement Plans - Pension Components Before Tax and Related Changes Net of Tax Recognized in AOCI (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Retirement Benefits [Abstract]      
Prior service cost $ (43) $ (85) $ (128)
Net loss (11,145) (9,590) (2,307)
Net amount recognized $ (11,188) $ (9,675) $ (2,435)
v3.25.1
Retirement Plans - Summary Changes in Plan Assets and Benefit Obligations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Changes in plan assets and benefit obligations:      
New prior service cost $ 0 $ 0 $ 0
Net loss (gain) arising during the year 228 7,439 (10,352)
Effect of exchange rates on amounts included in AOCI 260 127 (957)
Amounts recognized as a component of net periodic benefit costs:      
Amortization of prior service cost $ 42 42 41
Defined Benefit Plan Net Periodic Benefit Cost Credit Curtailment Gain Loss Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag Amortization of prior service cost    
Amortization or settlement recognition of net loss $ 1,069 (284) (438)
Defined Benefit Plan Net Periodic Benefit Cost Credit Settlement Gain Loss Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag Amortization or settlement recognition of net loss    
Total recognized in other comprehensive (income) loss $ 1,515 $ 7,240 $ (11,788)
v3.25.1
Retirement Plans - Summary of Recognized Components of Net Periodic Pension Cost Included in Accumulated Other Comprehensive Income (Detail)
$ in Thousands
Mar. 31, 2025
USD ($)
Retirement Benefits [Abstract]  
Prior service cost $ (42)
Net loss (567)
Net amount expected to be recognized $ (609)
v3.25.1
Retirement Plans - Summary of Accumulated Benefit Obligation Related to All Defined Pension Plans (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
United States Plans    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated benefit obligation $ 0 $ 13,313
Projected benefit obligation 0 0
Fair value of plan assets 0 0
United States Plans | Unfunded defined benefit plans    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated benefit obligation 0 0
Projected benefit obligation 0 0
United States Plans | Defined benefit plans with an accumulated benefit obligation in excess of the fair value of plan assets    
Defined Benefit Plan Disclosure [Line Items]    
Projected benefit obligation 0 0
Fair value of plan assets 0 0
Accumulated benefit obligation 0 0
International Plans    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated benefit obligation 51,690 53,169
Projected benefit obligation 27,214 27,009
Fair value of plan assets 325 0
International Plans | Unfunded defined benefit plans    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated benefit obligation 24,787 24,930
Projected benefit obligation 26,871 27,009
International Plans | Defined benefit plans with an accumulated benefit obligation in excess of the fair value of plan assets    
Defined Benefit Plan Disclosure [Line Items]    
Projected benefit obligation 26,871 27,009
Fair value of plan assets 0 0
Accumulated benefit obligation $ 24,787 $ 24,930
v3.25.1
Retirement Plans - Significant Assumptions Used to Determine Net Periodic Benefit Cost (Detail)
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 5.20% 4.90% 3.70%
Expected return on plan assets 3.25% 5.50% 5.50%
Minimum | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 3.80% 3.50% 1.50%
Expected return on plan assets 4.80% 4.00% 3.10%
Rate of compensation increase 2.50% 2.30% 1.80%
Maximum | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 5.30% 6.00% 5.40%
Expected return on plan assets 5.00% 4.70% 5.30%
Rate of compensation increase 4.50% 4.50% 5.50%
v3.25.1
Retirement Plans - Significant Assumptions Used to Determine Projected Benefit Obligations (Detail)
Mar. 31, 2025
Mar. 31, 2024
United States Plans    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate   5.20%
International Plans | Minimum    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 3.30% 3.80%
Rate of compensation increase 2.00% 2.50%
International Plans | Maximum    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 5.90% 5.30%
Rate of compensation increase 4.50% 4.50%
v3.25.1
Retirement Plans - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Expected cash contributions to pension plans in 2023 $ 1,616    
Defined Contribution Pension      
Defined Benefit Plan Disclosure [Line Items]      
Employer expenses 22,031 $ 22,819 $ 20,933
United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Employer expenses $ 0 $ 0  
v3.25.1
Retirement Plans - Summary of Pension Plan Investments Measured at Fair Value (Detail) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement $ 1,157 $ 15,153 $ 13,975
International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 30,164 32,563 $ 40,104
Quoted Price In Active Markets for Identical Assets (Level 1) | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 1,157 15,153  
Quoted Price In Active Markets for Identical Assets (Level 1) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 3,252 3,752  
Significant Other Observable Inputs (Level 2) | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
Significant Other Observable Inputs (Level 2) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 324 314  
Significant Unobservable Inputs (Level 3) | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
Significant Unobservable Inputs (Level 3) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 26,588 28,497  
Cash and Cash Equivalents | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 1,157 5,473  
Cash and Cash Equivalents | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 3,252 3,752  
Cash and Cash Equivalents | Quoted Price In Active Markets for Identical Assets (Level 1) | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 1,157 5,473  
Cash and Cash Equivalents | Quoted Price In Active Markets for Identical Assets (Level 1) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 3,252 3,752  
Cash and Cash Equivalents | Significant Other Observable Inputs (Level 2) | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
Cash and Cash Equivalents | Significant Other Observable Inputs (Level 2) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
Cash and Cash Equivalents | Significant Unobservable Inputs (Level 3) | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
Cash and Cash Equivalents | Significant Unobservable Inputs (Level 3) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
US Equity Securities | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
US Equity Securities | Quoted Price In Active Markets for Identical Assets (Level 1) | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
US Equity Securities | Significant Other Observable Inputs (Level 2) | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
US Equity Securities | Significant Unobservable Inputs (Level 3) | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
International Equity Securities | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
International Equity Securities | Quoted Price In Active Markets for Identical Assets (Level 1) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
International Equity Securities | Significant Other Observable Inputs (Level 2) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
International Equity Securities | Significant Unobservable Inputs (Level 3) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
Fixed Income Funds | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 9,680  
Fixed Income Funds | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 324 314  
Fixed Income Funds | Quoted Price In Active Markets for Identical Assets (Level 1) | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 9,680  
Fixed Income Funds | Quoted Price In Active Markets for Identical Assets (Level 1) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
Fixed Income Funds | Significant Other Observable Inputs (Level 2) | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
Fixed Income Funds | Significant Other Observable Inputs (Level 2) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 324 314  
Fixed Income Funds | Significant Unobservable Inputs (Level 3) | United States Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
Fixed Income Funds | Significant Unobservable Inputs (Level 3) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
Other Investments | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 26,588 28,497  
Other Investments | Quoted Price In Active Markets for Identical Assets (Level 1) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
Other Investments | Significant Other Observable Inputs (Level 2) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement 0 0  
Other Investments | Significant Unobservable Inputs (Level 3) | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Total Fair Value Measurement $ 26,588 $ 28,497  
v3.25.1
Retirement Plans - Schedule of Level 3 Rollforward (Details)
$ in Thousands
12 Months Ended
Mar. 31, 2025
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
Purchases $ (1,024)
Change due to exchange rate changes 626
International Plans  
Defined Benefit Plan Disclosure [Line Items]  
Fair value of plan assets at the beginning of the period 32,563
Fair value of plan assets at the end of the period 30,164
Significant Unobservable Inputs (Level 3) | International Plans  
Defined Benefit Plan Disclosure [Line Items]  
Fair value of plan assets at the beginning of the period 28,497
Fair value of plan assets at the end of the period 26,588
Other Investments | International Plans  
Defined Benefit Plan Disclosure [Line Items]  
Fair value of plan assets at the beginning of the period 28,497
Fair value of plan assets at the end of the period 26,588
Other Investments | Significant Unobservable Inputs (Level 3) | International Plans  
Defined Benefit Plan Disclosure [Line Items]  
Fair value of plan assets at the beginning of the period 28,497
Actual return on plan assets, relating to assets still held at the reporting date (1,511)
Fair value of plan assets at the end of the period $ 26,588
v3.25.1
Retirement Plans - Summary of Estimated Future Benefit Payments (Detail)
$ in Thousands
Mar. 31, 2025
USD ($)
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2026 $ 2,588
2027 2,468
2028 3,014
2029 3,579
2030 3,965
Years 2031-2035 $ 20,097
v3.25.1
Stockholders’ Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Class of Stock [Line Items]      
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000  
Preferred stock, par value (usd per share) $ 0.01 $ 0.01  
Preferred stock, shares issued (in shares) 0 0  
Preferred stock, shares outstanding (in shares) 0 0  
Number of shares of common stock purchased (in shares) 1,568,292 1,002,415 358,365
Repurchased common stock value $ 153,961 $ 95,690 $ 22,907
Treasury stock (in shares) 17,647,529 16,091,988  
Employee Stock Purchase Plan      
Class of Stock [Line Items]      
Shares issued in ESPP (USD per share) $ 62.55 $ 62.55 $ 62.55
Common Stock | Employee Stock Purchase Plan      
Class of Stock [Line Items]      
Shares issued in employee stock purchase plan (in shares) 12,751 13,981 17,077
v3.25.1
Stockholders' Equity - Change in Number of Shares of Common Stock Outstanding (Detail) - shares
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Shares outstanding, beginning balance (in shares) 40,271,936 40,901,059 40,986,658
Purchase of treasury stock (in shares) (1,568,292) (1,002,415) (358,365)
Shares issued as part of equity-based compensation plans, net of equity awards surrendered for option price and taxes (in shares) 488,417 373,292 272,766
Shares outstanding, ending balance (in shares) 39,192,061 40,271,936 40,901,059
v3.25.1
Stockholders' Equity - Components of Accumulated Other Comprehensive Income (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]      
Beginning Balance $ 1,757,072 $ 1,603,881 $ 1,493,275
Ending Balance 1,919,488 1,757,072 1,603,881
Pension funded status adjustment      
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]      
Beginning Balance (9,798) (4,423) (12,637)
Before Reclassifications 132 (5,672) 7,872
Amount Reclassified from AOCI (708) (708) 342
Ending Balance (10,374) (9,798) (4,423)
Foreign currency translation adjustment, gain 132 (5,672) 7,872
Net unrealized gain (loss) on derivative instruments      
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]      
Beginning Balance 755 1,411 2,963
Before Reclassifications (2,339) 6,283 (2,453)
Amount Reclassified from AOCI 1,315 1,315 901
Ending Balance (269) 755 1,411
Foreign currency translation adjustment, gain (2,339) 6,283 (2,453)
Foreign currency translation adjustment      
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]      
Beginning Balance (195,808) (180,462) (133,821)
Before Reclassifications (41,028) (15,346) (46,641)
Amount Reclassified from AOCI 0 0 0
Ending Balance (236,836) (195,808) (180,462)
Foreign currency translation adjustment, gain (41,028) (15,346) (46,641)
Foreign currency translation adjustment | Cross currency fixed interest rate swaps | Net investment hedges | Designated as Hedging Instrument      
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]      
Before Reclassifications 10,600 2,615 19,491
Foreign currency translation adjustment, gain 10,600 2,615 19,491
Foreign currency translation adjustment, tax 3,235 797 4,557
Accumulated other comprehensive loss      
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]      
Beginning Balance (204,851) (183,474) (143,495)
Before Reclassifications (43,235) (14,735) (41,222)
Amount Reclassified from AOCI 607 (6,642) 1,243
Ending Balance (247,479) (204,851) (183,474)
Foreign currency translation adjustment, gain $ (43,235) $ (14,735) $ (41,222)
v3.25.1
Stockholders' Equity and Noncontrolling Interests - (Reclassifications from AOCI) (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2025
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Derivatives in net investment hedging relationships        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Tax expense (benefit) $ 1,032   $ 167 $ 839
Net of tax (3,381)   (546) (2,748)
Derivatives in net investment hedging relationships | Reclassification out of Accumulated Other Comprehensive Income        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Net unrealized gain on derivative instruments, Interest expense (4,413)   (713) (3,587)
Defined benefit pension costs        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Prior service costs and deferrals (1,027)   326 478
Tax expense (benefit) 319   (29) (136)
Net of tax     297 342
Net unrealized gain (loss) on derivative instruments        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Tax expense (benefit) (402)   2,118 (275)
Net of tax     (6,939) 901
Amount Reclassified from AOCI   $ 1,315 1,315 901
Net unrealized gain (loss) on derivative instruments | Reclassification out of Accumulated Other Comprehensive Income        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Net unrealized gain (loss) on derivative instruments, Cost of goods sold $ 1,717   $ (9,057) $ 1,176
v3.25.1
Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future grants (in shares) 2,837,222    
Stock options granted (in shares) 266,027 200,314 310,140
Stock-based compensation expense $ 5,869 $ 7,022 $ 6,232
Stock-based compensation expense, net of tax $ 1,161 $ 730 $ 848
Market price per unit of stock award (usd per share) $ 98.62 $ 94.34 $ 66.90
Unrecognized compensation expense associated with non-vested incentive awards outstanding $ 64,214    
Nonvested stock, weighted average remaining contractual term 27 months    
Restricted Stock Units  (RSU)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Market price per unit of stock award (usd per share) $ 94.63    
Stock unit grant during period (in shares) 361,222    
Restricted Shares Restricted Stock Units and Market Share Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 21,867 $ 23,585 $ 20,139
Stock unit grant during period (in shares) 9,972 8,386 1,635
Equity-based compensation expense, tax benefit $ 3,520 $ 4,557 $ 3,746
Management | Nonqualified Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options granted (in shares) 266,027    
Vesting period, in years 3 years    
Management | Restricted Stock Units  (RSU)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Market price per unit of stock award (usd per share) $ 94.63 $ 94.31 $ 70.88
Stock unit grant during period (in shares) 361,222 269,751 345,449
Non Employee Directors | Restricted Stock Units  (RSU)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock units granted (in shares) 19,214 21,147 39,792
Market price per unit of stock award (usd per share) $ 76.52 $ 76.83 $ 42.95
Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future grants (in shares) 3,614,500    
Stock Options Issued In Fiscal 2010 | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options expiration period (in years) 10 years    
v3.25.1
Stock Based Compensation Stock-Based Compensation - Summary of Assumptions Used for Market Share Units (Detail) - Stock Options
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-free interest rate 3.84% 4.24% 2.92%
Dividend yield 1.02% 0.95% 0.99%
Expected life (years) 6 years 6 years 6 years
Volatility 38.61% 38.25% 37.40%
v3.25.1
Stock-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Number of Options        
Number of Options outstanding, Beginning Balance (in shares) 1,190,109 1,196,311 975,605  
Number of Options, Granted (in shares) 266,027 200,314 310,140  
Number of Options, Exercised (in shares) (139,016) (197,350) (75,180)  
Number of Options, Forfeited (in shares) (29,340) (9,166) (9,575)  
Number of Options, Expired (in shares) 0 0 (4,679)  
Number of Options outstanding, Ending Balance (in shares) 1,287,780 1,190,109 1,196,311 975,605
Number of Options, Exercisable (in shares) 818,637      
Number of Options, Vested and Expected to Vest (in shares) 1,269,049      
Weighted- Average Remaining Contract Term (Years)        
Options outstanding, Weighted Average Remaining Contract Term (Years) 6 years 9 months 18 days 7 years 7 years 3 months 18 days 7 years 6 months
Options exercisable, Weighted Average Remaining Contract Term (Years) 5 years 8 months 12 days      
Options vested and expected to vest, Weighted Average Remaining Contract Term (Years) 6 years 9 months 18 days      
Weighted- Average Exercise Price        
Options outstanding, Weighted Average Exercise Price, Beginning Balance (usd per share) $ 83.74 $ 78.83 $ 78.94  
Weighted Average Exercise Price, Granted (usd per share) 101.56 101.04 75.33  
Weighted Average Exercise Price, Exercised (usd per share) 76.66 71.81 65.22  
Weighted Average Exercise Price, Expired (usd per share) 98.38 78.68 80.05  
Weighted Average Exercise Price, Forfeited (usd per share) 0 0 85.12  
Options outstanding, Weighted Average Exercise Price, Ending Balance (usd per share) 87.85 $ 83.74 $ 78.83 $ 78.94
Options exercisable, Weighted Average Exercise Price (usd per share) 83.13      
Weighted Average Exercise Price, Vested and Expected to Vest (usd per share) $ 87.68      
Aggregate Intrinsic Value        
Options outstanding, Aggregate Intrinsic Value, Beginning Balance $ 15,043 $ 12,150 $ 3,605  
Options exercised, aggregate intrinsic value 3,950 6,110 1,561  
Options forfeited, aggregate intrinsic value 115 158 39  
Options expired, aggregate intrinsic value 0 0 0  
Options outstanding, Aggregate Intrinsic Value, Ending Balance 10,472 $ 15,043 $ 12,150 $ 3,605
Options exercisable, Aggregate Intrinsic Value 8,951      
Options vested and expected to vest, aggregate intrinsic value $ 10,455      
v3.25.1
Stock-Based Compensation - Summary of Information Regarding Stock Options Outstanding and Exercisable (Detail)
12 Months Ended
Mar. 31, 2025
$ / shares
shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Number of Options | shares 1,287,780
Weighted- Average Remaining Contractual Life (Years) 6 years 9 months 18 days
Weighted-Average Exercise Price (usd per share) | $ / shares $ 87.85
$57.60-$60.00  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Number of Options | shares 90,520
Weighted- Average Remaining Contractual Life (Years) 4 years
Weighted-Average Exercise Price (usd per share) | $ / shares $ 57.73
$70.01-$80.00  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Number of Options | shares 378,411
Weighted- Average Remaining Contractual Life (Years) 6 years 4 months 24 days
Weighted-Average Exercise Price (usd per share) | $ / shares $ 75.71
$80.01-$90.00  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Number of Options | shares 159,380
Weighted- Average Remaining Contractual Life (Years) 4 years 2 months 12 days
Weighted-Average Exercise Price (usd per share) | $ / shares $ 83.01
$90.01-$100.00  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Number of Options | shares 209,579
Weighted- Average Remaining Contractual Life (Years) 8 years 1 month 6 days
Weighted-Average Exercise Price (usd per share) | $ / shares $ 93.60
$100.01-$109.69  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Number of Options | shares 449,890
Weighted- Average Remaining Contractual Life (Years) 8 years 1 month 6 days
Weighted-Average Exercise Price (usd per share) | $ / shares $ 103.24
v3.25.1
Stock-Based Compensation - Summary of Changes in Restricted Stock Units and Market Share Units (Detail) - $ / shares
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Weighted average grant date fair value      
Weighted Average Grant Date Fair Value, Granted (usd per share) $ 98.62 $ 94.34 $ 66.90
Restricted Stock Units  (RSU)      
Number of RSU and MSU      
Number of Non-vested awards, Beginning Balance (in shares) 1,022,836    
Number of units, Granted (in shares) 361,222    
Number of units, Stock dividend (in shares) 9,685    
Number of units, Performance factor (in shares) 0    
Number of units, Vested (in shares) (435,043)    
Number of units, Forfeitures (in shares) (38,993)    
Number of Non-vested awards, Ending Balance (in shares) 919,707 1,022,836  
Weighted average grant date fair value      
Weighted Average Grant Date Fair Value, Non-vested awards, Beginning Balance (usd per share) $ 69.24    
Weighted Average Grant Date Fair Value, Granted (usd per share) 94.63    
Weighted Average Grant Date Fair Value, Stock dividend (usd per share) 75.49    
Weighted Average Grant Date Fair Value, Performance factor (usd per share) 0    
Weighted Average Grant Date Fair Value, Vested (usd per share) 64.39    
Weighted Average Grant Date Fair Value, Forfeitures (usd per share) 86.69    
Weighted Average Grant Date Fair Value, Non-vested awards, Ending Balance (usd per share) $ 80.42 $ 69.24  
Market condition-based Share Units (TSR)      
Number of RSU and MSU      
Number of Non-vested awards, Beginning Balance (in shares) 1,132    
Number of units, Granted (in shares) 0    
Number of units, Stock dividend (in shares) 11    
Number of units, Performance factor (in shares) 0    
Number of units, Vested (in shares) 0    
Number of units, Forfeitures (in shares) 0    
Number of Non-vested awards, Ending Balance (in shares) 1,143 1,132  
Weighted average grant date fair value      
Weighted Average Grant Date Fair Value, Non-vested awards, Beginning Balance (usd per share) $ 66.89    
Weighted Average Grant Date Fair Value, Granted (usd per share) 0    
Weighted Average Grant Date Fair Value, Stock dividend (usd per share) 66.89    
Weighted Average Grant Date Fair Value, Performance factor (usd per share) 0    
Weighted Average Grant Date Fair Value, Vested (usd per share) 0    
Weighted Average Grant Date Fair Value, Forfeitures (usd per share) 0    
Weighted Average Grant Date Fair Value, Non-vested awards, Ending Balance (usd per share) $ 66.89 $ 66.89  
v3.25.1
Earnings Per Share - Weighted Average Common Shares Basic and Common Shares Diluted (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Earnings Per Share [Abstract]      
Net earnings attributable to EnerSys stockholders $ 363,735 $ 269,096 $ 175,810
Basic (in shares) 39,760,829 40,669,392 40,809,235
Dilutive effect of:      
Common shares from exercise and lapse of equity awards, net of shares assumed reacquired (in shares) 677,750 702,047 517,520
Diluted weighted-average number of common shares outstanding (in shares) 40,438,579 41,371,439 41,326,755
Basic earnings per common share attributable to EnerSys stockholders (usd per share) $ 9.15 $ 6.62 $ 4.31
Diluted earnings per common share attributable to EnerSys stockholders (usd per share) $ 8.99 $ 6.50 $ 4.25
Anti-dilutive equity awards not included in diluted weighted-average common shares (in shares) 551,411,000 356,893,000 710,678,000
v3.25.1
Commitments, Contingencies and Litigation - Additional Information (Detail)
12 Months Ended
Mar. 31, 2025
Employee
Commitments and Contingencies Disclosure [Abstract]  
Company number of employees 10,858
Percentage of employees covered by collective bargaining agreements 28.00%
Percentage of collective bargaining agreements that expire in next twelve months 8.00%
Average term of collective bargaining agreements 2 years
Longest term of collective bargaining agreements 4 years
v3.25.1
Restructuring, Exit and Other Charges - Additional Information (Details)
3 Months Ended 12 Months Ended
Jun. 29, 2022
USD ($)
Employee
Mar. 03, 2022
USD ($)
Mar. 31, 2025
USD ($)
Jan. 03, 2021
USD ($)
Mar. 31, 2025
USD ($)
Employee
Mar. 31, 2024
USD ($)
Employee
Mar. 31, 2023
USD ($)
Employee
Mar. 31, 2022
USD ($)
Employee
Mar. 31, 2021
USD ($)
Nov. 08, 2023
USD ($)
Restructuring Cost and Reserve [Line Items]                    
Write-off of assets relating to restructuring and other exit charges         $ (1,973,000) $ (24,229,000) $ (8,920,000)      
Loss on assets held for sale         4,634,000 0 0      
Restructuring and other exit charges         14,428,000 28,103,000 16,439,000      
Restructuring charges, cash charges related to employee severance and other charges         (8,292,000) 6,064,000 2,224,000      
Employee Severance                    
Restructuring Cost and Reserve [Line Items]                    
Exit charges         7,454,000 20,097,000 14,752,000      
Restructuring charges         6,974,000 8,006,000 1,687,000      
Restructuring and other exit charges         14,428,000 28,103,000 16,439,000      
Closure of Facility in Hagen, Germany                    
Restructuring Cost and Reserve [Line Items]                    
Expected remaining restructuring charges               $ 60,000,000    
Expected reduction in number of employees | Employee               200    
Fixed asset impairment       $ 3,975,000            
Assets held for sale     $ 7,000,000   7,000,000          
Loss on assets held for sale     (4,867,000)              
Fair value of fixed assets     2,113,000 $ 14,456,000 2,113,000          
Closure of Facility in Hagen, Germany | Fixed Asset Write Off, Non-Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Restructuring charges               $ 3,522,000 $ 7,946,000  
Closure of Facility in Hagen, Germany | Severance, Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Restructuring charges               8,069,000 $ 23,331,000  
Closure of Facility in Hagen, Germany | Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Expected remaining restructuring charges               40,000,000    
Closure of Facility in Hagen, Germany | Inventory, Non-Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Expected remaining restructuring charges               20,000,000    
Cost of goods sold               $ 960,000    
Closure of Facility in Hagen, Germany | Site Clean Up, Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Restructuring charges         3,625,000 2,118,000 2,207,000      
Closure of Facility in Hagen, Germany | Accelerated Depreciation, Non Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Restructuring charges         598,000 526,000 562,000      
Closure Of Facility In Ooltewah, Tennessee                    
Restructuring Cost and Reserve [Line Items]                    
Expected remaining restructuring charges $ 18,500,000                  
Expected reduction in number of employees | Employee 165                  
Closure Of Facility In Ooltewah, Tennessee | Non Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Expected remaining restructuring charges $ 9,300,000           7,261,000      
Closure Of Facility In Ooltewah, Tennessee | Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Expected remaining restructuring charges $ 9,200,000   $ 474,000   474,000 4,399,000 2,735,000      
Closure Of Facility In Ooltewah, Tennessee | Inventories, Non Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Expected remaining restructuring charges             1,613,000      
Closure of Facility in Sylmar, California                    
Restructuring Cost and Reserve [Line Items]                    
Write-off of assets relating to restructuring and other exit charges   $ (9,769,000)                
Exit charges           13,661,000        
Restructuring charges           3,892,000        
Closure of Facility in Sylmar, California | Non Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Restructuring charges           377,000        
Closure of Facility in Sylmar, California | Severance, Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Restructuring charges         931,000 7,155,000 1,682,000      
Closure of Facility in Sylmar, California | Contract Assets, Non-Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Restructuring charges             417,000      
Closure of Facility in Sylmar, California | Inventory, Non-Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Restructuring charges           3,098,000        
OutBack And Mojave Brands                    
Restructuring Cost and Reserve [Line Items]                    
Expected remaining restructuring charges                   $ 24,500,000
OutBack And Mojave Brands | Employee Severance                    
Restructuring Cost and Reserve [Line Items]                    
Expected remaining restructuring charges                   900,000
Write-off of assets relating to restructuring and other exit charges           (689,000)        
OutBack And Mojave Brands | Non Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Expected remaining restructuring charges                   23,600,000
Write-off of assets relating to restructuring and other exit charges         (333,000) (551,000)        
OutBack And Mojave Brands | Inventories, Non Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Write-off of assets relating to restructuring and other exit charges         (275,000) (17,075,000)        
Closure Of Facility In Spokane, Washington                    
Restructuring Cost and Reserve [Line Items]                    
Expected remaining restructuring charges                   3,600,000
Closure Of Facility In Spokane, Washington | Employee Severance                    
Restructuring Cost and Reserve [Line Items]                    
Expected remaining restructuring charges                   1,400,000
Write-off of assets relating to restructuring and other exit charges           (1,343,000)        
Closure Of Facility In Spokane, Washington | Fixed Asset Write Off, Non-Cash Charges                    
Restructuring Cost and Reserve [Line Items]                    
Expected remaining restructuring charges                   $ 2,200,000
Write-off of assets relating to restructuring and other exit charges           (2,066,000)        
Energy Systems | Employee Severance                    
Restructuring Cost and Reserve [Line Items]                    
Severance payments         $ 3,364,000 $ 4,468,000 1,230,000      
Approximate number of positions eliminated | Employee         160 146        
Exit charges         $ 993,000 $ 4,312,000 123,000      
Restructuring charges         5,001,000 4,526,000 1,318,000      
Restructuring and other exit charges         5,994,000 $ 8,838,000 $ 1,441,000      
Motive Power | Employee Severance                    
Restructuring Cost and Reserve [Line Items]                    
Severance payments         $ 1,492,000          
Approximate number of positions eliminated | Employee         66 37 9      
Exit charges         $ 4,144,000 $ 8,253,000 $ 12,537,000      
Restructuring charges         1,575,000 3,445,000 327,000      
Restructuring and other exit charges         5,719,000 11,698,000 12,864,000      
Specialty | Employee Severance                    
Restructuring Cost and Reserve [Line Items]                    
Severance payments         $ 397,000          
Approximate number of positions eliminated | Employee         4          
Exit charges         $ 2,317,000 7,532,000 2,092,000      
Restructuring charges         398,000 35,000 42,000      
Restructuring and other exit charges         $ 2,715,000 $ 7,567,000 $ 2,134,000      
v3.25.1
Restructuring, Exit and Other Charges - Acquisition and Non-Acquisition Related Restructuring Reserve (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Restructuring Cost and Reserve [Line Items]      
Restructuring and other exit charges $ 14,428 $ 28,103 $ 16,439
Restructuring Reserve [Roll Forward]      
Beginning balance 2,408 445 1,030
Accrued 6,974 8,006 1,687
Costs incurred (8,292) 6,064 2,224
Foreign currency impact and other (11) 21 (48)
Ending balance $ 1,079 $ 2,408 $ 445
Accrued Restructuring Incurred Cost Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag Accrued Accrued Accrued
Employee Severance      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 6,974 $ 8,006 $ 1,687
Exit charges 7,454 20,097 14,752
Restructuring and other exit charges 14,428 28,103 16,439
Employee Severance | Energy Systems      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 5,001 4,526 1,318
Exit charges 993 4,312 123
Restructuring and other exit charges 5,994 8,838 1,441
Employee Severance | Motive Power      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 1,575 3,445 327
Exit charges 4,144 8,253 12,537
Restructuring and other exit charges 5,719 11,698 12,864
Employee Severance | Specialty      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 398 35 42
Exit charges 2,317 7,532 2,092
Restructuring and other exit charges $ 2,715 $ 7,567 $ 2,134
v3.25.1
Warranty (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Product Warranty Accrual [Roll Forward]      
Balance at beginning of year $ 60,819 $ 56,630 $ 54,978
Current year provisions 32,400 34,110 29,132
Costs incurred (27,867) (30,160) (25,251)
Foreign currency translation adjustment 1,069 239 (2,229)
Balance at end of year $ 66,421 $ 60,819 $ 56,630
v3.25.1
Other (Income) Expense, Net (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Other Income and Expenses [Abstract]      
Foreign exchange transaction (gains) losses $ (3,324) $ (6,053) $ 671
Non-service components of pension expense (1,259) 1,530 315
Cost of Funds Asset Securitization 8,672 8,776 2,314
Other 2,904 5,178 4,893
Total $ 6,993 $ 9,431 $ 8,193
v3.25.1
Business Segments - Additional Information (Details)
$ in Thousands
12 Months Ended
Mar. 31, 2025
USD ($)
segments
Country
Mar. 31, 2024
USD ($)
Mar. 31, 2023
Segment Reporting Information [Line Items]      
Number of operating segments | segments 4    
Operations in number of countries | Country 100    
Property, plant, and equipment, net $ 592,433 $ 532,450  
United States      
Segment Reporting Information [Line Items]      
Property, plant, and equipment, net $ 422,263 $ 357,416  
United States | Geographic Concentration Risk | Revenue Benchmark      
Segment Reporting Information [Line Items]      
Percentage of sales to customers 63.50% 60.20% 63.40%
v3.25.1
Business Segments - Schedule of Financial Information by Reportable Segment (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Segment Reporting Information [Line Items]      
Net Sales by segment to unaffiliated customers $ 3,617,579 $ 3,581,871 $ 3,708,579
Less:      
Inventory adjustment relating to exit activities (3,609) (20,173) (681)
Restructuring and other exit charges (14,428) (28,103) (16,439)
Loss on assets held for sale 4,634 0 0
Impairment of indefinite-lived intangibles 0 13,619 480
Amortization of intangible assets 31,805 27,993 30,748
Acquisition expense   201 404
Integration costs   420 138
Total operating earnings by segment 464,686 351,570 278,361
Capital Expenditures 121,038 86,437 88,772
Depreciation and amortization 100,876 92,021 91,153
Property, plant, and equipment, net 592,433 532,450  
Operating Segments      
Segment Reporting Information [Line Items]      
Net Sales by segment to unaffiliated customers 3,608,774 3,581,871 3,708,579
Segment income 372,915 332,971 310,859
Less:      
Inventory adjustment relating to exit activities (3,609) (20,173) (681)
Restructuring and other exit charges (14,428) (28,103) (16,439)
Loss on assets held for sale 4,634    
Impairment of indefinite-lived intangibles   13,619 480
Legal proceedings charge, net   3,705  
Amortization of intangible assets 31,805 27,994 30,747
Acquisition expense 2,498    
Integration costs 3,990    
Other 2,357 4,446 892
Total operating earnings by segment 309,594 234,310 261,078
Corporate and Other      
Segment Reporting Information [Line Items]      
Net Sales by segment to unaffiliated customers 8,805 0 0
Other segment items 3,244,664 3,248,900 3,397,720
Less:      
Total operating earnings by segment 155,092 117,260 17,283
Energy Systems      
Less:      
Capital Expenditures 39,167 33,626 37,249
Depreciation and amortization 50,443 49,469 52,034
Property, plant, and equipment, net 198,841 189,519  
Energy Systems | Americas      
Less:      
Acquisition expense   16 87
Integration costs   420 138
Energy Systems | Americas | Operating Segments      
Segment Reporting Information [Line Items]      
Net Sales by segment to unaffiliated customers 1,531,169 1,590,023 1,738,195
Segment income 103,206 86,955 90,400
Less:      
Inventory adjustment relating to exit activities (274) (17,075) 211
Restructuring and other exit charges (5,994) (8,840) (1,441)
Loss on assets held for sale 0    
Impairment of indefinite-lived intangibles   13,619 100
Legal proceedings charge, net   3,705  
Amortization of intangible assets 23,620 24,503 27,383
Acquisition expense 11    
Integration costs (96)    
Other 673 3,304 487
Total operating earnings by segment 72,730 15,473 60,975
Energy Systems | Americas | Corporate and Other      
Segment Reporting Information [Line Items]      
Other segment items 1,427,963 1,503,068 1,647,795
Motive Power      
Less:      
Capital Expenditures 22,758 17,115 16,373
Depreciation and amortization 23,695 23,690 22,404
Property, plant, and equipment, net 144,076 145,395  
Motive Power | EMEA      
Less:      
Acquisition expense   185 317
Integration costs   0 0
Motive Power | EMEA | Operating Segments      
Segment Reporting Information [Line Items]      
Net Sales by segment to unaffiliated customers 1,484,117 1,456,181 1,451,244
Segment income 232,755 214,650 179,972
Less:      
Inventory adjustment relating to exit activities 0 0 (892)
Restructuring and other exit charges (5,719) (11,697) (12,864)
Loss on assets held for sale 4,634    
Impairment of indefinite-lived intangibles   0 0
Legal proceedings charge, net   0  
Amortization of intangible assets 685 683 441
Acquisition expense 11    
Integration costs 0    
Other 1,574 847 310
Total operating earnings by segment 220,132 201,238 165,148
Motive Power | EMEA | Corporate and Other      
Segment Reporting Information [Line Items]      
Other segment items 1,251,362 1,241,531 1,271,272
Specialty      
Less:      
Capital Expenditures 47,016 35,596 35,150
Depreciation and amortization 26,706 18,762 16,715
Property, plant, and equipment, net 236,861 197,368  
Specialty | Asia      
Less:      
Acquisition expense   0 0
Integration costs   0 0
Specialty | Asia | Operating Segments      
Segment Reporting Information [Line Items]      
Net Sales by segment to unaffiliated customers 593,488 535,667 519,140
Segment income 36,954 31,366 40,487
Less:      
Inventory adjustment relating to exit activities (3,335) (3,098) 0
Restructuring and other exit charges (2,715) (7,566) (2,134)
Loss on assets held for sale 0    
Impairment of indefinite-lived intangibles   0 380
Legal proceedings charge, net   0  
Amortization of intangible assets 7,500 2,808 2,923
Acquisition expense 2,476    
Integration costs 4,086    
Other 110 295 95
Total operating earnings by segment 16,732 17,599 34,955
Specialty | Asia | Corporate and Other      
Segment Reporting Information [Line Items]      
Other segment items 556,534 504,301 478,653
Other      
Less:      
Capital Expenditures 12,097 100 0
Depreciation and amortization 32 100 $ 0
Property, plant, and equipment, net $ 12,655 $ 168  
v3.25.1
Subsequent Events - Additional Information (Detail)
May 21, 2025
$ / shares
Subsequent Event  
Subsequent Event [Line Items]  
Common Stock cash dividends, per share (usd per share) $ 0.24