EnerSys (ENS) 10-Q 10 Nov 21 2022 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Oct. 03, 2021	Nov. 05, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Oct. 3, 2021
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		41,891,298
Entity Central Index Key	0001289308
Current Fiscal Year End Date	--03-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Amendment Flag	false

Consolidated Condensed Balance

Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Oct. 03, 2021	Mar. 31, 2021
Current assets:
Cash and cash equivalents	$ 407,506	$ 451,808
Accounts receivable, net of allowance for doubtful accounts: October 3, 2021 - $12,423; March 31, 2021 - $12,992	584,584	603,581
Inventories, net	640,998	518,247
Prepaid and other current assets	135,768	117,681
Total current assets	1,768,856	1,691,317
Property, plant, and equipment, net	500,092	497,056
Goodwill	703,164	705,593
Other intangible assets, net	413,646	430,898
Deferred taxes	65,275	65,212
Other assets	66,421	72,721
Total assets	3,517,454	3,462,797
Current liabilities:
Short-term debt	36,006	34,153
Accounts payable	294,975	323,876
Accrued expenses	273,852	318,959
Total current liabilities	604,833	676,988
Long-term debt, net of unamortized debt issuance costs	1,075,989	969,618
Deferred taxes	77,068	76,412
Other liabilities	185,707	196,203
Total liabilities	1,943,597	1,919,221
Commitments and contingencies
Equity:
Preferred Stock, $0.01 par value, 1,000,000 shares authorized, no shares issued or outstanding at October 3, 2021 and at March 31, 2021	0	0
Common Stock, $0.01 par value per share, 135,000,000 shares authorized, 55,732,195 shares issued and 42,630,966 shares outstanding at October 3, 2021; 55,552,810 shares issued and 42,753,020 shares outstanding at March 31, 2021	557	555
Additional paid-in capital	556,202	554,168
Treasury stock at cost, 13,101,229 shares held as of October 3, 2021 and 12,799,790 shares held as of March 31, 2021	(594,649)	(563,481)
Retained earnings	1,734,057	1,669,751
Contra equity - indemnification receivable	(4,001)	(5,355)
Accumulated other comprehensive loss	(122,147)	(115,883)
Total EnerSys stockholders’ equity	1,570,019	1,539,755
Nonredeemable noncontrolling interests	3,838	3,821
Total equity	1,573,857	1,543,576
Total liabilities and equity	$ 3,517,454	$ 3,462,797

Consolidated Condensed Balanc_2

Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Oct. 03, 2021	Mar. 31, 2021
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 12,423	$ 12,992
Preferred stock, par value (in dollars 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 (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	135,000,000	135,000,000
Common stock, shares, issued (in shares)	55,732,195	55,552,810
Common stock, shares, outstanding (in shares)	42,630,966	42,753,020
Treasury stock, shares	13,101,229	12,799,790

Consolidated Condensed Statemen

Consolidated Condensed Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Income Statement [Abstract]
Net sales	$ 791,395	$ 708,402	$ 1,606,288	$ 1,413,326
Cost of goods sold	612,575	530,842	1,234,249	1,060,789
Inventory adjustment relating to exit activities	960	0	960	0
Gross profit	177,860	177,560	371,079	352,537
Operating expenses	125,309	119,026	249,796	239,396
Restructuring and other exit charges	2,857	3,119	10,689	4,506
Operating earnings	49,694	55,415	110,594	108,635
Interest expense	9,573	9,829	18,680	19,994
Other (income) expense, net	198	4,110	(298)	5,572
Earnings before income taxes	39,923	41,476	92,212	83,069
Income tax expense	4,297	5,745	12,657	12,155
Net earnings attributable to EnerSys stockholders	$ 35,626	$ 35,731	$ 79,555	$ 70,914
Net earnings per common share attributable to EnerSys stockholders:
Basic (in dollars per share)	$ 0.84	$ 0.84	$ 1.87	$ 1.67
Diluted (in dollars per share)	0.82	0.83	1.83	1.65
Dividends per common share (in dollars per share)	$ 0.175	$ 0.175	$ 0.35	$ 0.35
Weighted average shares of common stock outstanding:
Basic (in shares)	42,575,576	42,521,659	42,637,953	42,453,774
Diluted (in shares)	43,255,832	43,087,455	43,396,588	43,009,755

Consolidated Condensed Statem_2

Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Statement of Comprehensive Income [Abstract]
Net earnings	$ 35,626	$ 35,731	$ 79,555	$ 70,914
Other comprehensive income:
Net unrealized (loss) gain on derivative instruments, net of tax	(2,233)	1,470	1,664	3,813
Pension funded status adjustment, net of tax	233	305	473	596
Foreign currency translation adjustment	(23,658)	32,833	(8,337)	60,980
Total other comprehensive (loss) income, net of tax	(25,658)	34,608	(6,200)	65,389
Total comprehensive income	9,968	70,339	73,355	136,303
Comprehensive income attributable to noncontrolling interests	15	144	64	152
Comprehensive income attributable to EnerSys stockholders	$ 9,953	$ 70,195	$ 73,291	$ 136,151

Consolidated Condensed Statem_3

Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020
Cash flows from operating activities
Net earnings	$ 79,555	$ 70,914
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	48,340	47,059
Write-off of assets relating to exit activities	3,756	1,753
Derivatives not designated in hedging relationships:
Net gains	(117)	(372)
Cash proceeds	147	846
Provision for doubtful accounts	1,240	182
Deferred income taxes	108	(1,820)
Non-cash interest expense	1,133	1,036
Stock-based compensation	9,424	10,586
(Gain) loss on disposal of property, plant, and equipment	(37)	156
Changes in assets and liabilities:
Accounts receivable	15,914	106,581
Inventories	(125,479)	21,080
Prepaid and other current assets	(18,969)	7,369
Other assets	1,686	3,132
Accounts payable	(32,694)	(49,557)
Accrued expenses	(48,013)	1,282
Other liabilities	(1,565)	(2,954)
Net cash (used in) provided by operating activities	(65,571)	217,273
Cash flows from investing activities
Capital expenditures	(34,622)	(39,905)
Proceeds from disposal of facility	3,268	0
Proceeds from disposal of property, plant, and equipment	133	81
Net cash used in investing activities	(31,221)	(39,824)
Cash flows from financing activities
Net borrowings (repayments) on short-term debt	2,155	(16,502)
Proceeds from Second Amended Revolver borrowings	275,700	45,000
Repayments of Second Amended Revolver borrowings	(5,700)	(100,000)
Repayments of Second Amended Term Loan	(161,447)	(16,837)
Debt issuance costs	(2,952)	0
Option proceeds, net	1,158	1,766
Payment of taxes related to net share settlement of equity awards	(9,000)	(4,602)
Purchase of treasury stock	(31,512)	0
Dividends paid to stockholders	(14,891)	(14,879)
Other	393	255
Net cash provided by (used in) financing activities	53,904	(105,799)
Effect of exchange rate changes on cash and cash equivalents	(1,414)	15,603
Net (decrease) increase in cash and cash equivalents	(44,302)	87,253
Cash and cash equivalents at beginning of period	451,808	326,979
Cash and cash equivalents at end of period	$ 407,506	$ 414,232

Basis of Presentation

Basis of Presentation	6 Months Ended
	Oct. 03, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated condensed financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments except those otherwise described herein) considered necessary for a fair presentation have been included, unless otherwise disclosed. Operating results for the three and six months ended October 3, 2021 are not necessarily indicative of the results that may be expected for the fiscal year ending March 31, 2022. The Consolidated Condensed Balance Sheet at March 31, 2021 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. The financial statements should be read in conjunction with the Consolidated Financial Statements and Notes thereto included in the Company’s 2021 Annual Report on Form 10-K (SEC File No. 001-32253), which was filed on May 26, 2021 (the “2021 Annual Report”). EnerSys (the “Company”) reports interim financial information for 13-week periods, except for the first quarter, which always begins on April 1, and the fourth quarter, which always ends on March 31. The four quarters in fiscal 2022 end on July 4, 2021, October 3, 2021, January 2, 2022, and March 31, 2022, respectively. The four quarters in fiscal 2021 ended on July 5, 2020, October 4, 2020, January 3, 2021, and March 31, 2021, respectively. The consolidated condensed 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. All intercompany transactions and balances have been eliminated in consolidation. Recently Adopted Accounting Pronouncements In December 2019, the FASB issued ASU No. 2019-12, “Income Taxes (Topic 740)”: Simplifying the Accounting for Income Taxes, which is intended to simplify various aspects related to accounting for income taxes. ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. The guidance is effective for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. The Company adopted the standard in the first quarter of fiscal 2022 and the adoption did not have a material impact on the Company's consolidated financial statements. 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, including, but not limited to, the potential impacts arising from the coronavirus pandemic including its variants (“COVID-19”) and public and private sector policies and initiatives aimed at reducing its transmission. As the extent and duration of the impacts of COVID-19 remain unclear, the Company’s estimates and assumptions may evolve as conditions change. Actual results could differ significantly 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, goodwill and intangible assets, valuation allowances on tax assets, pension and postretirement benefit obligations, contingencies and the identification and valuation of assets acquired and liabilities assumed in connection with business combinations.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Oct. 03, 2021
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition The Company's revenues by reportable segments are presented in Note 17. 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. Service revenues for the second quarter of fiscal 2022 and 2021 amounted to $90,112 and $74,327, respectively. Service revenues for the six months of fiscal 2022 and 2021 amounted to $172,630 and $143,085, respectively. 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 the second quarter of fiscal 2022 and 2021 amounted to $43,607 and $35,074, respectively. Revenues recognized over time for the six months of fiscal 2022 and 2021 amounted to $84,511 and $71,176, respectively. On October 3, 2021, the aggregate transaction price allocated to unsatisfied (or partially unsatisfied) performance obligations was approximately $145,299, of which, the Company estimates that approximately $102,976 will be recognized as revenue in fiscal 2022, $35,962 in fiscal 2023, $6,324 in fiscal 2024, and $37 in fiscal 2025. 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 October 3, 2021, the current and non-current portion of contract liabilities were $17,561 and $1,375, respectively. As of March 31, 2021, the current and non-current portion of contract liabilities were $15,992 and $2,072, respectively. Revenues recognized during the second quarter of fiscal 2022 and 2021 that were included in the contract liability at the beginning of the quarter, amounted to $5,467 and $4,175, respectively. Revenues recognized during the six months of fiscal 2022 and 2021 that were included in the contract liability at the beginning of the quarter, amounted to $5,182 and $7,641, respectively. Amounts representing work completed and not billed to customers represent contract assets and were $53,358 and $46,451 as of October 3, 2021 and March 31, 2021, 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 October 3, 2021, the right of return asset related to the value of inventory anticipated to be returned from customers was $4,604 and refund liability representing amounts estimated to be refunded to customers was $8,059.

Leases

Leases	6 Months Ended
	Oct. 03, 2021
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 17 years. Short term leases with an initial term of 12 months or less are not presented on the balance sheet and expense is recognized on a straight-line basis over the lease term. The following table presents lease assets and liabilities and their balance sheet classification: Classification As of October 3, 2021 As of Operating Leases: Right-of-use assets Other assets $ 56,116 $ 62,159 Operating lease current liabilities Accrued expenses 19,334 21,774 Operating lease non-current liabilities Other liabilities 39,025 42,528 Finance Leases: Right-of-use assets Property, plant, and equipment, net $ 460 $ 573 Finance lease current liabilities Accrued expenses 220 236 Finance lease non-current liabilities Other liabilities 328 435 The components of lease expense for the second quarter and six months ended October 3, 2021 and October 4, 2020 were as follows: Quarter ended Six months ended Classification October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Operating Leases: Operating lease cost Operating expenses $ 6,422 $ 6,745 $ 13,138 $ 13,681 Variable lease cost Operating expenses 2,354 1,613 4,927 3,732 Short term lease cost Operating expenses 1,753 1,578 3,570 3,406 Finance Leases: Depreciation Operating expenses $ 59 $ 46 $ 119 $ 88 Interest expense Interest expense 7 7 15 14 Total $ 10,595 $ 9,989 $ 21,769 $ 20,921 The following table presents the weighted average lease term and discount rates for leases as of October 3, 2021 and March 31, 2021: October 3, 2021 March 31, 2021 Operating Leases: Weighted average remaining lease term (years) 5.7 years 5.5 years Weighted average discount rate 5.09% 5.16% Finance Leases: Weighted average remaining lease term (years) 2.7 years 3.1 years Weighted average discount rate 4.80% 4.81% The following table presents future payments due under leases reconciled to lease liabilities as of October 3, 2021: Finance Leases Operating Leases Six months ended March 31, 2022 $ 132 $ 11,907 Year ended March 31, 2023 216 17,366 2024 157 11,476 2025 47 7,699 2026 26 5,678 Thereafter — 13,337 Total undiscounted lease payments 578 67,463 Present value discount 30 9,104 Lease liability $ 548 $ 58,359 The following table presents supplemental disclosures of cash flow information related to leases for the second quarter and six months ended October 3, 2021 and October 4, 2020: Quarter ended Six months ended October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases $ 7 $ 7 $ 15 $ 14 Operating cash flows from operating leases 6,484 6,739 13,249 13,660 Financing cash flows from finance leases 60 45 120 86 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 $ — $ 87 $ — $ 87 Right-of-use assets obtained in exchange for new operating lease liabilities 1,909 955 5,590 7,132
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 17 years. Short term leases with an initial term of 12 months or less are not presented on the balance sheet and expense is recognized on a straight-line basis over the lease term. The following table presents lease assets and liabilities and their balance sheet classification: Classification As of October 3, 2021 As of Operating Leases: Right-of-use assets Other assets $ 56,116 $ 62,159 Operating lease current liabilities Accrued expenses 19,334 21,774 Operating lease non-current liabilities Other liabilities 39,025 42,528 Finance Leases: Right-of-use assets Property, plant, and equipment, net $ 460 $ 573 Finance lease current liabilities Accrued expenses 220 236 Finance lease non-current liabilities Other liabilities 328 435 The components of lease expense for the second quarter and six months ended October 3, 2021 and October 4, 2020 were as follows: Quarter ended Six months ended Classification October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Operating Leases: Operating lease cost Operating expenses $ 6,422 $ 6,745 $ 13,138 $ 13,681 Variable lease cost Operating expenses 2,354 1,613 4,927 3,732 Short term lease cost Operating expenses 1,753 1,578 3,570 3,406 Finance Leases: Depreciation Operating expenses $ 59 $ 46 $ 119 $ 88 Interest expense Interest expense 7 7 15 14 Total $ 10,595 $ 9,989 $ 21,769 $ 20,921 The following table presents the weighted average lease term and discount rates for leases as of October 3, 2021 and March 31, 2021: October 3, 2021 March 31, 2021 Operating Leases: Weighted average remaining lease term (years) 5.7 years 5.5 years Weighted average discount rate 5.09% 5.16% Finance Leases: Weighted average remaining lease term (years) 2.7 years 3.1 years Weighted average discount rate 4.80% 4.81% The following table presents future payments due under leases reconciled to lease liabilities as of October 3, 2021: Finance Leases Operating Leases Six months ended March 31, 2022 $ 132 $ 11,907 Year ended March 31, 2023 216 17,366 2024 157 11,476 2025 47 7,699 2026 26 5,678 Thereafter — 13,337 Total undiscounted lease payments 578 67,463 Present value discount 30 9,104 Lease liability $ 548 $ 58,359 The following table presents supplemental disclosures of cash flow information related to leases for the second quarter and six months ended October 3, 2021 and October 4, 2020: Quarter ended Six months ended October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases $ 7 $ 7 $ 15 $ 14 Operating cash flows from operating leases 6,484 6,739 13,249 13,660 Financing cash flows from finance leases 60 45 120 86 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 $ — $ 87 $ — $ 87 Right-of-use assets obtained in exchange for new operating lease liabilities 1,909 955 5,590 7,132

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Oct. 03, 2021
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: Balance as of October 3, 2021 March 31, 2021 Gross Amount Accumulated Amortization Net Amount Gross Amount Accumulated Amortization Net Amount Indefinite-lived intangible assets: Trademarks $ 148,103 $ (953) $ 147,150 $ 148,164 $ (953) $ 147,211 Finite-lived intangible assets: Customer relationships 298,178 (98,633) 199,545 298,576 (87,308) 211,268 Non-compete 2,825 (2,825) — 2,825 (2,825) — Technology 97,304 (34,168) 63,136 97,349 (29,561) 67,788 Trademarks 8,012 (4,197) 3,815 8,012 (3,381) 4,631 Licenses 1,196 (1,196) — 1,196 (1,196) — Total $ 555,618 $ (141,972) $ 413,646 $ 556,122 $ (125,224) $ 430,898 The Company’s amortization expense related to finite-lived intangible assets was $8,329 and $16,748 for the second quarter and six months of fiscal 2022, compared to $8,187 and $16,742 for the second quarter and six months of fiscal 2021. The expected amortization expense based on the finite-lived intangible assets as of October 3, 2021, is $15,786 for the remainder of fiscal 2022, $30,399 in fiscal 2023, $27,544 in fiscal 2024, $26,552 in fiscal 2025 and $25,618 in fiscal 2026. Goodwill The following table presents the amount of goodwill, as well as any changes in the carrying amount of goodwill by segment during the six months of fiscal 2022: Energy Systems Motive Power Specialty Total Balance at March 31, 2021 $ 279,676 $ 327,055 $ 98,862 $ 705,593 Foreign currency translation adjustment (1,461) (720) (248) (2,429) Balance as of October 3, 2021 $ 278,215 $ 326,335 $ 98,614 $ 703,164

Inventories

Inventories	6 Months Ended
	Oct. 03, 2021
Inventory Disclosure [Abstract]
Inventories	Inventories October 3, 2021 March 31, 2021 Raw materials $ 203,548 $ 147,040 Work-in-process 117,130 97,715 Finished goods 320,320 273,492 Total $ 640,998 $ 518,247

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
	Oct. 03, 2021
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 October 3, 2021 and March 31, 2021, and the basis for that measurement: Total Fair Value Measurement October 3, 2021 Quoted Price in Significant Significant Lead forward contracts $ (2,913) $ — $ (2,913) $ — Foreign currency forward contracts 165 — 165 — Total derivatives $ (2,748) $ — $ (2,748) $ — Total Fair Value Measurement March 31, 2021 Quoted Price in Significant Significant Lead forward contracts $ (1,980) $ — $ (1,980) $ — Foreign currency forward contracts 424 — 424 — Total derivatives $ (1,556) $ — $ (1,556) $ — 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 to the Company's consolidated financial statements included in the 2021 Annual Report. The fair values for foreign currency forward contracts 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. 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 12), 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. In fiscal 2020, the Company issued its 4.375% Senior Notes due December 15, 2027 (the “2027 Notes”), with an original face value of $300,000. The Company's 5.00% Senior Notes due April 30, 2023 (the “2023 Notes”), with an original face value of $300,000, were issued in fiscal 2016. The fair value of the Company's 2027 Notes and 2023 Notes, (collectively, the “Senior Notes”) represent the trading values based upon quoted market prices and are classified as Level 2. The 2027 Notes were trading at approximately 106% and 102% of face value on October 3, 2021 and March 31, 2021, respectively. The 2023 Notes were trading at approximately 103% and 105% of face value on October 3, 2021 and March 31, 2021, respectively. The carrying amounts and estimated fair values of the Company’s derivatives and Senior Notes at October 3, 2021 and March 31, 2021 were as follows: October 3, 2021 March 31, 2021 Carrying Fair Value Carrying Fair Value Financial assets: Derivatives (1) $ — $ — $ — $ — Financial liabilities: Senior Notes (2) $ 600,000 $ 625,890 $ 600,000 $ 621,000 Derivatives (1) 2,748 2,748 1,556 1,556 (1) Represents lead and foreign currency forward contracts (see Note 7 for asset and liability positions of the lead and foreign currency forward contracts at October 3, 2021 and March 31, 2021). (2) The fair value amount of the Senior Notes at October 3, 2021 and March 31, 2021 represent the trading value of the instruments.

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Oct. 03, 2021
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 and foreign exchange rates 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 October 3, 2021 and March 31, 2021, the Company has hedged the price to purchase approximately 49.0 million pounds and 54.5 million pounds of lead, respectively, for a total purchase price of $50,847 and $50,567, 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 October 3, 2021 and March 31, 2021, the Company had entered into a total of $27,192 and $26,033, respectively, of such contracts. In the coming twelve months, the Company anticipates that $2,770 of pretax gain relating to lead and foreign currency forward contracts will be reclassified from AOCI (“Accumulated Other Comprehensive Income”) as part of cost of goods sold. This amount represents the current net unrealized impact of hedging lead and foreign exchange rates, which will change as market rates change in the future, and will ultimately be realized in the Consolidated Condensed Statements of Income as an offset to the corresponding actual changes in lead costs to be realized in connection with the variable lead cost and foreign exchange rates being 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 Condensed Statements of Income. As of October 3, 2021 and March 31, 2021, the notional amount of these contracts was $26,027 and $28,995, respectively. Presented below in tabular form is information on the location and amounts of derivative fair values in the Consolidated Condensed Balance Sheets and derivative gains and losses in the Consolidated Condensed Statements of Income: Fair Value of Derivative Instruments October 3, 2021 and March 31, 2021 Derivatives and Hedging Activities Designated as Cash Flow Hedges Derivatives and Hedging Activities Not Designated as Hedging Instruments October 3, 2021 March 31, 2021 October 3, 2021 March 31, 2021 Prepaid and other current assets: Lead forward contracts $ — $ — $ — $ — Foreign currency forward contracts 295 524 — — Total assets $ 295 $ 524 $ — $ — Accrued expenses: Lead forward contracts $ 2,913 $ 1,980 $ — $ — Foreign currency forward contracts — — 130 100 Total liabilities $ 2,913 $ 1,980 $ 130 $ 100 The Effect of Derivative Instruments on the Consolidated Condensed Statements of Income For the quarter ended October 3, 2021 Derivatives Designated as Cash Flow Hedges Pretax 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 $ (2,409) Cost of goods sold $ 817 Foreign currency forward contracts 442 Cost of goods sold 132 Total $ (1,967) $ 949 Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income on Derivatives Pretax Gain (Loss) Foreign currency forward contracts Other (income) expense, net $ 123 Total $ 123 The Effect of Derivative Instruments on the Consolidated Condensed Statements of Income For the quarter ended October 4, 2020 Derivatives Designated as Cash Flow Hedges Pretax 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 $ (2,219) Cost of goods sold $ (4,854) Foreign currency forward contracts (454) Cost of goods sold 257 Total $ (2,673) $ (4,597) Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income on Derivatives Pretax Gain (Loss) Foreign currency forward contracts Other (income) expense, net $ 260 Total $ 260 The Effect of Derivative Instruments on the Consolidated Condensed Statements of Income For the six months ended October 3, 2021 Derivatives Designated as Cash Flow Hedges Pretax 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 $ 5,163 Cost of goods sold $ 3,276 Foreign currency forward contracts 253 Cost of goods sold (28) Total $ 5,416 $ 3,248 Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income on Derivatives Pretax Gain (Loss) Foreign currency forward contracts Other (income) expense, net $ 117 Total $ 117 The Effect of Derivative Instruments on the Consolidated Condensed Statements of Income For the six months ended October 4, 2020 Derivatives Designated as Cash Flow Hedges Pretax 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 $ (3,493) Cost of goods sold $ (8,653) Foreign currency forward contracts (193) Cost of goods sold (26) Total $ (3,686) $ (8,679) Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income on Derivatives Pretax Gain (Loss) Foreign currency forward contracts Other (income) expense, net $ 372 Total 372

Income Taxes

Income Taxes	6 Months Ended
	Oct. 03, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesThe Company’s income tax provision consists of federal, state and foreign income taxes. The tax provision for the second quarter of fiscal 2022 and 2021 was based on the estimated effective tax rates applicable for the full years ending March 31, 2022 and March 31, 2021, respectively, after giving effect to items specifically related to the interim periods. The Company’s 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, change in tax laws and the amount of the Company's consolidated earnings before taxes. On May 19, 2019, a public referendum held in Switzerland approved the Federal Act on Tax Reform and AHV (Old-Age and Survivors Insurance) Financing (TRAF) as adopted by the Swiss Federal Parliament on September 28, 2018. The Swiss tax reform measures were effective January 1, 2020. The Company recorded an income tax benefit of $1,883 during the six months of fiscal 2021. The consolidated effective income tax rates for the second quarter of fiscal 2022 and 2021 were 10.8% and 13.9%, and for the six months of fiscal 2022 and 2021 were 13.7% and 14.6%, respectively. The rate decrease in the second quarter compared to the prior quarter is primarily due to Hagen, Germany exit charges and changes in the mix of earnings among tax jurisdictions. The rate decrease in the six months of fiscal 2022 compared to the prior year period is primarily due to Hagen, Germany exit charges and changes in mix of earnings among tax jurisdictions, partially offset by the Swiss tax reform. Foreign income as a percentage of worldwide income is estimated to be 76% for fiscal 2022 compared to 67% for fiscal 2021. The foreign effective tax rates for the six months of fiscal 2022 and 2021 were 9.9% and 10.6%, respectively. Income from the Company's Swiss subsidiary comprised a substantial portion of the Company's overall foreign mix of income for both fiscal 2022 and fiscal 2021 and were taxed at an effective income tax rate of approximately 8% in both periods.

Warranty

Warranty	6 Months Ended
	Oct. 03, 2021
Product Warranties Disclosures [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: Quarter ended Six months ended October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Balance at beginning of period $ 59,167 $ 59,771 $ 58,962 $ 63,525 Current period provisions 2,331 7,683 7,661 14,657 Costs incurred (4,120) (8,662) (9,372) (19,972) Foreign currency translation adjustment (1,156) 1,520 (1,029) 2,102 Balance at end of period $ 56,222 $ 60,312 $ 56,222 $ 60,312

Commitments, Contingencies and

Commitments, Contingencies and Litigation	6 Months Ended
	Oct. 03, 2021
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, anticompetition, 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. For additional information regarding these matters, see Note 19 - Commitments, Contingencies and Litigation to the consolidated financial statements contained in the 2021 Annual Report. As of October 3, 2021 and March 31, 2021, 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. Lead and Foreign Currency Forward Contracts 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. Please refer to Note 7 - Derivative Financial Instruments

Restructuring Plans

Restructuring Plans	6 Months Ended
	Oct. 03, 2021
Restructuring and Related Activities [Abstract]
Restructuring Plans	Restructuring and other Exit Charges Restructuring Programs As disclosed in the 2021 Annual Report, the Company committed to restructuring plans aimed at improving operational efficiencies across its lines of business. A substantial portion of these plans are complete with an estimated $2,447 remaining to be incurred by the end of fiscal 2022, mainly related to plans started in fiscal 2021 and 2022. Restructuring and exit charges for the second quarter and six months of fiscal 2022 by reportable segments are as follows: Quarter ended October 3, 2021 Energy Systems Motive Power Specialty Total Restructuring charges $ 161 $ 849 $ 3 $ 1,013 Exit charges — 1,827 17 1,844 Restructuring and other exit charges $ 161 $ 2,676 $ 20 $ 2,857 Six months ended October 3, 2021 Energy Systems Motive Power Specialty Total Restructuring charges $ 1,019 $ 1,281 $ 39 $ 2,339 Exit charges (370) 9,928 (1,208) 8,350 Restructuring and other exit charges $ 649 $ 11,209 $ (1,169) $ 10,689 A roll-forward of the restructuring reserve, excluding exit charges, is as follows: Balance as of March 31, 2021 $ 2,595 Accrued 2,339 Costs incurred (3,400) Foreign currency impact 49 Balance as of October 3, 2021 $ 1,583 Exit Charges Fiscal 2021 Programs Hagen, Germany In fiscal 2021, the EnerSys’ Board of Directors approved a plan to close substantially 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 are expected to be recorded by the end of calendar 2021. 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 the six months of fiscal 2022, the Company recorded cash charges primarily relating to severance of $6,663 and non-cash charges of $3,635 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. Targovishte, Bulgaria During fiscal 2019, the Company committed to a plan to close its facility in Targovishte, Bulgaria, which produced diesel-electric submarine batteries. Management determined that the future demand for batteries of diesel-electric submarines was not sufficient given the number of competitors in the market. Of the estimated total charges of $26,000 for this plan, the Company had recorded charges amounting to $20,242 in fiscal 2019, relating to severance and inventory and fixed asset write-offs and an additional $5,123 relating to cash and non-cash charges during fiscal 2020. During fiscal 2021, in keeping with its strategy of exiting the manufacture of batteries for diesel-electric submarines, the Company completed further actions which resulted in $220 relating to cash and non-cash charges. During the six months of fiscal 2022, the Company sold this facility for $1,489. A net gain of $1,208 was recorded as a credit to exit charges in the Consolidated Condensed Statement of Income. Vijayawada, India During fiscal 2021, the Company committed to a plan to close its facility in Vijayawada, India to align with its strategic vision for the new line of business structure and footprint. The Company recorded exit charges of $1,509, primarily relating to asset write-offs. Fiscal 2022 Program Zamudio, Spain During the first quarter of fiscal 2022, the Company closed a minor assembling plant in Zamudio, Spain and sold the same for $1,779. A net gain of $740 was recorded as a credit to exit charges in the Consolidated Condensed Statement of Income. Richmond, Kentucky Plant Fire During fiscal 2021, the Company settled its claims with its insurance carrier relating to the fire that broke out in the battery formation area of the Company's Richmond, Kentucky motive power production facility in fiscal 2020.

Debt

Debt	6 Months Ended
	Oct. 03, 2021
Debt Disclosure [Abstract]
Debt	Debt The following summarizes the Company’s long-term debt as of October 3, 2021 and March 31, 2021: October 3, 2021 March 31, 2021 Principal Unamortized Issuance Costs Principal Unamortized Issuance Costs Senior Notes $ 600,000 $ 4,505 $ 600,000 $ 5,106 Second Amended Credit Facility, due 2026 484,229 3,735 376,039 1,315 $ 1,084,229 $ 8,240 $ 976,039 $ 6,421 Less: Unamortized issuance costs 8,240 6,421 Long-term debt, net of unamortized issuance costs $ 1,075,989 $ 969,618 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 Second 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 rank pari passu with the 2023 Notes (defined below). 5.00% Senior Notes due 2023 The 5% Senior Notes due April 30, 2023 (the “2023 Notes”) bear interest at a rate of 5.00% per annum and have an original face value of $300,000. Interest is payable semiannually in arrears on April 30 and October 30 of each year and commenced on October 30, 2015. The 2023 Notes will mature on April 30, 2023, unless earlier redeemed or repurchased in full. The 2023 Notes are unsecured and unsubordinated obligations of the Company. The 2023 Notes are fully and unconditionally guaranteed, jointly and severally, by certain of its subsidiaries that are guarantors under the Second Amended Credit Facility. These guarantees are unsecured and unsubordinated obligations of such guarantors. 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) 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 current quarter, the Company entered into a second amendment to the Amended 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) 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. Subsequent to the second amendment, the quarterly installments payable on the Second Amended Term Loan are $2,678 beginning December 31, 2022, $4,017 beginning December 31, 2024 and $5,356 beginning December 31, 2025 with a final payment of $160,672 on September 30, 2026. The Second 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 London Interbank Offered Rate (“LIBOR”) or Canadian Dollar Offered Rate (“CDOR”) plus (i) LIBOR plus between 1.125% and 2.00% (currently 1.25% 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 Second Amended Credit Facility provides for alternate benchmark rates such as the Secured Overnight Financing Rate (“SOFR”) to replace LIBOR when it is phased out. Obligations under the Second 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 Second Amended Credit Facility allows for up to two temporary increases in the maximum leverage ratio from 3.50x to 4.00x for a four quarter period following an acquisition larger than $250,000. As of October 3, 2021, the Company had $270,000 outstanding under the Second Amended Revolver and $214,229 under the Second Amended Term Loan. The current portion of the Second Amended Term Loan is $0. Short-Term Debt As of October 3, 2021 and March 31, 2021, the Company had $36,006 and $34,153, respectively, of short-term borrowings. The weighted average interest rate on these borrowings was approximately 2% at both October 3, 2021 and at March 31, 2021. Letters of Credit As of October 3, 2021 and March 31, 2021, the Company had $2,959 of standby letters of credit. Debt Issuance Costs In connection with the Second Amended Credit Facility, the Company capitalized $2,952 in debt issuance costs and wrote off $128 of unamortized debt issuance costs. Amortization expense, relating to debt issuance costs, included in interest expense was $615 and 518, respectively, for the second quarter ended October 3, 2021 and October 4, 2020 and $1,133 and $1,036 for the six months of fiscal 2022 and fiscal 2021, respectively. Debt issuance costs, net of accumulated amortization, totaled $8,240 and $6,421, respectively, at October 3, 2021 and March 31, 2021. Available Lines of Credit As of October 3, 2021 and March 31, 2021, the Company had available and undrawn, under all its lines of credit, $688,959 and $697,875, respectively, including $111,084 and $122,303, respectively, of uncommitted lines of credit.

Retirement Plans

Retirement Plans	6 Months Ended
	Oct. 03, 2021
Retirement Benefits [Abstract]
Retirement Plans	Retirement Plans The following tables present the components of the Company’s net periodic benefit cost related to its defined benefit pension plans: United States Plans International Plans Quarter ended Quarter ended October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Service cost $ — $ — $ 291 $ 252 Interest cost 130 133 360 348 Expected return on plan assets (129) (66) (555) (474) Amortization and deferral 5 132 297 259 Net periodic benefit cost $ 6 $ 199 $ 393 $ 385 United States Plans International Plans Six months ended Six months ended October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Service cost $ — $ — $ 590 $ 487 Interest cost 260 265 726 675 Expected return on plan assets (257) (131) (1,118) (921) Amortization and deferral 10 265 600 503 Net periodic benefit cost $ 13 $ 399 $ 798 $ 744

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Oct. 03, 2021
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation As of October 3, 2021, the Company maintains the 2017 Equity Incentive Plan as amended from time to time (“2017 EIP”). The 2017 EIP reserved 4,173,554 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. The Company recognized stock-based compensation expense associated with its equity incentive plans of $5,765 for the second quarter of fiscal 2022 and $5,533 for the second quarter of fiscal 2021. Stock-based compensation was $9,424 and $10,586 for the six months of fiscal 2022 and fiscal 2021, respectively. The Company recognizes compensation expense using the straight-line method over the vesting period of the awards. During the six months of fiscal 2022, the Company granted to non-employee directors 22,250 restricted stock units, under the deferred compensation plan for non-employee directors. The awards vest immediately upon the date of grant and are settled in shares of common stock. During the six months of fiscal 2022, the Company granted to management and other key employees 246,222 non-qualified stock options that vest ratably over three years from the date of grant and 229,600 restricted stock units that vest ratably over four years from the date of grant. Common stock activity during the six months of fiscal 2022 included the exercise of 37,390 stock options and the vesting of 204,586 restricted stock units, 46,048 TSRs and 670 PSUs.

Stockholders' Equity and Noncon

Stockholders' Equity and Noncontrolling Interests	6 Months Ended
	Oct. 03, 2021
Equity [Abstract]
Stockholders' Equity and Noncontrolling Interests	Stockholders’ Equity and Noncontrolling Interests Common Stock The following demonstrates the change in the number of shares of common stock outstanding during the six months ended October 3, 2021: Shares outstanding as of March 31, 2021 42,753,020 Purchase of treasury stock (329,008) Shares issued under equity-based compensation plans, net of equity awards surrendered for option price and taxes 206,954 Shares outstanding as of October 3, 2021 42,630,966 Treasury Stock During the six months ended October 3, 2021, the Company purchased 329,008 shares for $31,512 and did not purchase any shares during the six months ended October 4, 2020. At October 3, 2021 and March 31, 2021, the Company held 13,101,229 and 12,799,790 shares as treasury stock, respectively. During the six months ended October 3, 2021, the Company also issued 7,569 shares out of its treasury stock, valued at $62.55 per share, on a LIFO basis, to participants under the Company's Employee Stock Purchase Plan. See Note 18 Subsequent Events for additional information relating to stock repurchase activity subsequent to October 3, 2021. Accumulated Other Comprehensive Income ( “ AOCI ” ) The components of AOCI, net of tax, as of October 3, 2021 and March 31, 2021, are as follows: March 31, 2021 Before Reclassifications Amounts Reclassified from AOCI October 3, 2021 Pension funded status adjustment $ (20,947) $ — $ 473 $ (20,474) Net unrealized gain (loss) on derivative instruments 360 4,151 (2,487) 2,024 Foreign currency translation adjustment (95,296) (8,401) — (103,697) Accumulated other comprehensive (loss) income $ (115,883) $ (4,250) $ (2,014) $ (122,147) The following table presents reclassifications from AOCI during the second quarter ended October 3, 2021: Components of AOCI Amounts Reclassified from AOCI Location of (Gain) Loss Recognized on Income Statement Derivatives in cash flow hedging relationships: Net unrealized gain on derivative instruments $ (949) Cost of goods sold Tax expense 222 Net unrealized gain on derivative instruments, net of tax $ (727) Defined benefit pension costs: Prior service costs and deferrals $ 302 Net periodic benefit cost, included in other (income) expense, net - See Note 13 Tax benefit (69) Net periodic benefit cost, net of tax $ 233 The following table presents reclassifications from AOCI during the six months ended October 3, 2021: Components of AOCI Amounts Reclassified from AOCI Location of (Gain) Loss Recognized on Income Statement Derivatives in cash flow hedging relationships: Net unrealized gain on derivative instruments $ (3,248) Cost of goods sold Tax expense 761 Net unrealized gain on derivative instruments, net of tax $ (2,487) Defined benefit pension costs: Prior service costs and deferrals $ 610 Net periodic benefit cost, included in other (income) expense, net - See Note 13 Tax benefit (137) Net periodic benefit cost, net of tax $ 473 The following table presents reclassifications from AOCI during the second quarter ended October 4, 2020: Components of AOCI Amounts Reclassified from AOCI Location of (Gain) Loss Recognized on Income Statement Derivatives in cash flow hedging relationships: Net unrealized loss on derivative instruments $ 4,597 Cost of goods sold Tax benefit (1,088) Net unrealized loss on derivative instruments, net of tax $ 3,509 Defined benefit pension costs: Prior service costs and deferrals $ 391 Net periodic benefit cost, included in other (income) expense, net - See Note 13 Tax benefit (86) Net periodic benefit cost, net of tax $ 305 The following table presents reclassifications from AOCI during the six months ended October 4, 2020: The following demonstrates the change in equity attributable to EnerSys stockholders and nonredeemable noncontrolling interests during the second quarter and six months ended October 3, 2021: (In Thousands , Except Per Share Data) Preferred Common Additional Paid-in Treasury Retained Accumulated Contra-Equity Total Non- Total Balance at March 31, 2021 $ — $ 555 $ 554,168 $ (563,481) $ 1,669,751 $ (115,883) $ (5,355) $ 1,539,755 $ 3,821 $ 1,543,576 Stock-based compensation — — 3,659 — — — — 3,659 — 3,659 Exercise of stock options — 1 386 — — — — 387 — 387 Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net — — (4,803) — — — — (4,803) — (4,803) Purchase of common stock — — — (31,512) — — — (31,512) — (31,512) Other — — 44 170 — — — 214 — 214 Net earnings — — — — 43,929 — — 43,929 — 43,929 Dividends ($0.175 per common share) — — 173 — (7,608) — — (7,435) — (7,435) Dissolution of joint venture — — — — — — — — (47) (47) Other comprehensive income: Pension funded status adjustment (net of tax benefit of $68) — — — — — 240 — 240 — 240 Net unrealized gain (loss) on derivative instruments (net of tax expense of $1,187) — — — — — 3,897 — 3,897 — 3,897 Foreign currency translation adjustment — — — — — 15,272 — 15,272 49 15,321 Balance at July 4, 2021 $ — $ 556 $ 553,627 $ (594,823) $ 1,706,072 $ (96,474) $ (5,355) $ 1,563,603 $ 3,823 $ 1,567,426 Stock-based compensation — — 5,765 — — — — 5,765 — 5,765 Exercise of stock options — 1 770 — — — — 771 — 771 Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net — — (4,197) — — — — (4,197) — (4,197) Contra equity - adjustment to indemnification receivable for acquisition related tax liability — — — — — — 1,354 1,354 — 1,354 Purchase of common stock — — — — — — — — — — Other — — 52 174 — — — 226 — 226 Net earnings — — — — 35,626 — — 35,626 — 35,626 Dividends ($0.175 per common share) — — 185 — (7,641) — — (7,456) — (7,456) Other comprehensive income: Pension funded status adjustment (net of tax benefit of $69) — — — — — 233 — 233 — 233 Net unrealized gain (loss) on derivative instruments (net of tax benefit of $(683)) — — — — — (2,233) — (2,233) — (2,233) Foreign currency translation adjustment — — — — — (23,673) — (23,673) 15 (23,658) Balance at October 3, 2021 $ — $ 557 $ 556,202 $ (594,649) $ 1,734,057 $ (122,147) $ (4,001) $ 1,570,019 $ 3,838 $ 1,573,857 The following demonstrates the change in equity attributable to EnerSys stockholders and nonredeemable noncontrolling interests during the second quarter and six months ended October 4, 2020: (In Thousands , Except Per Share Data) Preferred Common Additional Paid-in Treasury Retained Accumulated Contra-Equity Total Non- Total Balance at March 31, 2020 $ — $ 551 $ 529,100 $ (564,376) $ 1,556,980 $ (215,006) $ (6,724) $ 1,300,525 $ 3,537 $ 1,304,062 Stock-based compensation — — 5,053 — — — — 5,053 — 5,053 Exercise of stock options — 2 479 — — — — 481 — 481 Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net — — (3,135) — — — — (3,135) — (3,135) Purchase of common stock — — — — — — — — — — Other — — (123) 299 — — — 176 — 176 Net earnings — — — — 35,183 — — 35,183 — 35,183 Dividends ($0.175 per common share) — — 172 — (7,600) — — (7,428) — (7,428) Other comprehensive income: Pension funded status adjustment (net of tax benefit of $86) — — — — — 291 — 291 — 291 Net unrealized gain (loss) on derivative instruments (net of tax expense of $726) — — — — — 2,343 — 2,343 — 2,343 Foreign currency translation adjustment — — — — — 28,139 — 28,139 8 28,147 Balance at July 5, 2020 $ — $ 553 $ 531,546 $ (564,077) $ 1,584,563 $ (184,233) $ (6,724) $ 1,361,628 $ 3,545 $ 1,365,173 Stock-based compensation — — 5,533 — — — — 5,533 — 5,533 Exercise of stock options — 1 1,284 — — — — 1,285 — 1,285 Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net — — (1,467) — — — — (1,467) — (1,467) Contra equity - adjustment to indemnification receivable for acquisition related tax liability — — — — — — 1,451 1,451 — 1,451 Purchase of common stock — — — — — — — — — — Other — — (7) 224 — — — 217 — 217 Net earnings — — — — 35,731 — — 35,731 — 35,731 Dividends ($0.175 per common share) — — 203 — (7,654) — — (7,451) — (7,451) Other comprehensive income: Pension funded status adjustment (net of tax benefit of $86) — — — — — 305 — 305 — 305 Net unrealized gain (loss) on derivative instruments (net of tax expense of $454) — — — — — 1,470 — 1,470 — 1,470 Foreign currency translation adjustment — — — — — 32,689 — 32,689 144 32,833 Balance at October 4, 2020 $ — $ 554 $ 537,092 $ (563,853) $ 1,612,640 $ (149,769) $ (5,273) $ 1,431,391 $ 3,689 $ 1,435,080

Earnings Per Share

Earnings Per Share	6 Months Ended
	Oct. 03, 2021
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. Quarter ended Six months ended October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Net earnings attributable to EnerSys stockholders $ 35,626 $ 35,731 $ 79,555 $ 70,914 Weighted-average number of common shares outstanding: Basic 42,575,576 42,521,659 42,637,953 42,453,774 Dilutive effect of: Common shares from exercise and lapse of equity awards, net of shares assumed reacquired 680,256 565,796 758,635 555,981 Diluted weighted-average number of common shares outstanding 43,255,832 43,087,455 43,396,588 43,009,755 Basic earnings per common share attributable to EnerSys stockholders $ 0.84 $ 0.84 $ 1.87 $ 1.67 Diluted earnings per common share attributable to EnerSys stockholders $ 0.82 $ 0.83 $ 1.83 $ 1.65 Anti-dilutive equity awards not included in diluted weighted-average common shares 288,018 149,616 226,702 267,940

Business Segments

Business Segments	6 Months Ended
	Oct. 03, 2021
Segment Reporting [Abstract]
Business Segments	Business Segments Summarized financial information related to the Company's reportable segments for the second quarter and six months ended October 3, 2021 and October 4, 2020, is shown below: Quarter ended Six months ended October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Net sales by segment to unaffiliated customers (1) Energy Systems $ 369,839 $ 340,822 $ 741,045 $ 694,209 Motive Power 320,687 263,738 656,803 526,572 Specialty 100,869 103,842 208,440 192,545 Total net sales $ 791,395 $ 708,402 $ 1,606,288 $ 1,413,326 Operating earnings by segment Energy Systems $ 1,129 $ 22,997 $ 8,235 $ 45,082 Motive Power 40,996 24,149 91,630 51,425 Specialty 11,386 11,388 22,378 16,634 Inventory adjustment relating to exit activities - Motive Power (960) — (960) — Restructuring and other exit charges - Energy Systems (161) (1,331) (649) (1,843) Restructuring and other exit charges - Motive Power (2,676) (1,681) (11,209) (2,443) Restructuring and other exit charges - Specialty (20) (107) 1,169 (220) Total operating earnings (2) $ 49,694 $ 55,415 $ 110,594 $ 108,635 (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.

Subsequent Events

Subsequent Events	6 Months Ended
	Oct. 03, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsBetween October 4, 2021 through November 5, 2021, the Company repurchased 742,811 shares for approximately $57,000, exhausting the Company's existing $100,000 stock repurchase authorization. On November 10, 2021, the Company also announced the establishment of a new $100,000 stock repurchase authorization, with no expiration date. This authorization is in addition to the existing stock repurchase program that authorizes the Company to repurchase up to such number of shares as shall equal the dilutive effects of any equity based award.On November 10, 2021, the Board of Directors approved a quarterly cash dividend of $0.175 per share of common stock to be paid on December 31, 2021, to stockholders of record as of December 17, 2021.

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
	Oct. 03, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated condensed financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments except those otherwise described herein) considered necessary for a fair presentation have been included, unless otherwise disclosed. Operating results for the three and six months ended October 3, 2021 are not necessarily indicative of the results that may be expected for the fiscal year ending March 31, 2022. The Consolidated Condensed Balance Sheet at March 31, 2021 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. The financial statements should be read in conjunction with the Consolidated Financial Statements and Notes thereto included in the Company’s 2021 Annual Report on Form 10-K (SEC File No. 001-32253), which was filed on May 26, 2021 (the “2021 Annual Report”). EnerSys (the “Company”) reports interim financial information for 13-week periods, except for the first quarter, which always begins on April 1, and the fourth quarter, which always ends on March 31. The four quarters in fiscal 2022 end on July 4, 2021, October 3, 2021, January 2, 2022, and March 31, 2022, respectively. The four quarters in fiscal 2021 ended on July 5, 2020, October 4, 2020, January 3, 2021, and March 31, 2021, respectively. The consolidated condensed 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. All intercompany transactions and balances have been eliminated in consolidation.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In December 2019, the FASB issued ASU No. 2019-12, “Income Taxes (Topic 740)”: Simplifying the Accounting for Income Taxes, which is intended to simplify various aspects related to accounting for income taxes. ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. The guidance is effective for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. The Company adopted the standard in the first quarter of fiscal 2022 and the adoption did not have a material impact on the Company's consolidated financial statements.
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. These estimates and assumptions take into account historical and forward looking factors that the Company believes are reasonable, including, but not limited to, the potential impacts arising from the coronavirus pandemic including its variants (“COVID-19”) and public and private sector policies and initiatives aimed at reducing its transmission. As the extent and duration of the impacts of COVID-19 remain unclear, the Company’s estimates and assumptions may evolve as conditions change. Actual results could differ significantly 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, goodwill and intangible assets, valuation allowances on tax assets, pension and postretirement benefit obligations, contingencies and the identification and valuation of assets acquired and liabilities assumed in connection with business combinations.

Leases (Tables)

Leases (Tables)	6 Months Ended
	Oct. 03, 2021
Leases [Abstract]
Lessee, Supplemental Balance Sheet Information Related To Leases	The following table presents lease assets and liabilities and their balance sheet classification: Classification As of October 3, 2021 As of Operating Leases: Right-of-use assets Other assets $ 56,116 $ 62,159 Operating lease current liabilities Accrued expenses 19,334 21,774 Operating lease non-current liabilities Other liabilities 39,025 42,528 Finance Leases: Right-of-use assets Property, plant, and equipment, net $ 460 $ 573 Finance lease current liabilities Accrued expenses 220 236 Finance lease non-current liabilities Other liabilities 328 435
Lease, Cost	The components of lease expense for the second quarter and six months ended October 3, 2021 and October 4, 2020 were as follows: Quarter ended Six months ended Classification October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Operating Leases: Operating lease cost Operating expenses $ 6,422 $ 6,745 $ 13,138 $ 13,681 Variable lease cost Operating expenses 2,354 1,613 4,927 3,732 Short term lease cost Operating expenses 1,753 1,578 3,570 3,406 Finance Leases: Depreciation Operating expenses $ 59 $ 46 $ 119 $ 88 Interest expense Interest expense 7 7 15 14 Total $ 10,595 $ 9,989 $ 21,769 $ 20,921
Lessee, Supplemental Information Related To Leases	The following table presents the weighted average lease term and discount rates for leases as of October 3, 2021 and March 31, 2021: October 3, 2021 March 31, 2021 Operating Leases: Weighted average remaining lease term (years) 5.7 years 5.5 years Weighted average discount rate 5.09% 5.16% Finance Leases: Weighted average remaining lease term (years) 2.7 years 3.1 years Weighted average discount rate 4.80% 4.81%
Lessee, Operating Lease, Liability, Maturity	The following table presents future payments due under leases reconciled to lease liabilities as of October 3, 2021: Finance Leases Operating Leases Six months ended March 31, 2022 $ 132 $ 11,907 Year ended March 31, 2023 216 17,366 2024 157 11,476 2025 47 7,699 2026 26 5,678 Thereafter — 13,337 Total undiscounted lease payments 578 67,463 Present value discount 30 9,104 Lease liability $ 548 $ 58,359
Finance Lease, Liability, Maturity	The following table presents future payments due under leases reconciled to lease liabilities as of October 3, 2021: Finance Leases Operating Leases Six months ended March 31, 2022 $ 132 $ 11,907 Year ended March 31, 2023 216 17,366 2024 157 11,476 2025 47 7,699 2026 26 5,678 Thereafter — 13,337 Total undiscounted lease payments 578 67,463 Present value discount 30 9,104 Lease liability $ 548 $ 58,359
Lessee, Supplemental Cash Flow Information Related To Leases	The following table presents supplemental disclosures of cash flow information related to leases for the second quarter and six months ended October 3, 2021 and October 4, 2020: Quarter ended Six months ended October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases $ 7 $ 7 $ 15 $ 14 Operating cash flows from operating leases 6,484 6,739 13,249 13,660 Financing cash flows from finance leases 60 45 120 86 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 $ — $ 87 $ — $ 87 Right-of-use assets obtained in exchange for new operating lease liabilities 1,909 955 5,590 7,132

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Oct. 03, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets	Information regarding the Company’s other intangible assets are as follows: Balance as of October 3, 2021 March 31, 2021 Gross Amount Accumulated Amortization Net Amount Gross Amount Accumulated Amortization Net Amount Indefinite-lived intangible assets: Trademarks $ 148,103 $ (953) $ 147,150 $ 148,164 $ (953) $ 147,211 Finite-lived intangible assets: Customer relationships 298,178 (98,633) 199,545 298,576 (87,308) 211,268 Non-compete 2,825 (2,825) — 2,825 (2,825) — Technology 97,304 (34,168) 63,136 97,349 (29,561) 67,788 Trademarks 8,012 (4,197) 3,815 8,012 (3,381) 4,631 Licenses 1,196 (1,196) — 1,196 (1,196) — Total $ 555,618 $ (141,972) $ 413,646 $ 556,122 $ (125,224) $ 430,898
Schedule of Goodwill	The following table presents the amount of goodwill, as well as any changes in the carrying amount of goodwill by segment during the six months of fiscal 2022: Energy Systems Motive Power Specialty Total Balance at March 31, 2021 $ 279,676 $ 327,055 $ 98,862 $ 705,593 Foreign currency translation adjustment (1,461) (720) (248) (2,429) Balance as of October 3, 2021 $ 278,215 $ 326,335 $ 98,614 $ 703,164

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Oct. 03, 2021
Inventory Disclosure [Abstract]
Summary Of Inventories	October 3, 2021 March 31, 2021 Raw materials $ 203,548 $ 147,040 Work-in-process 117,130 97,715 Finished goods 320,320 273,492 Total $ 640,998 $ 518,247

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Oct. 03, 2021
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 October 3, 2021 and March 31, 2021, and the basis for that measurement: Total Fair Value Measurement October 3, 2021 Quoted Price in Significant Significant Lead forward contracts $ (2,913) $ — $ (2,913) $ — Foreign currency forward contracts 165 — 165 — Total derivatives $ (2,748) $ — $ (2,748) $ — Total Fair Value Measurement March 31, 2021 Quoted Price in Significant Significant Lead forward contracts $ (1,980) $ — $ (1,980) $ — Foreign currency forward contracts 424 — 424 — Total derivatives $ (1,556) $ — $ (1,556) $ —
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 October 3, 2021 and March 31, 2021 were as follows: October 3, 2021 March 31, 2021 Carrying Fair Value Carrying Fair Value Financial assets: Derivatives (1) $ — $ — $ — $ — Financial liabilities: Senior Notes (2) $ 600,000 $ 625,890 $ 600,000 $ 621,000 Derivatives (1) 2,748 2,748 1,556 1,556 (1) Represents lead and foreign currency forward contracts (see Note 7 for asset and liability positions of the lead and foreign currency forward contracts at October 3, 2021 and March 31, 2021). (2) The fair value amount of the Senior Notes at October 3, 2021 and March 31, 2021 represent the trading value of the instruments.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	6 Months Ended
	Oct. 03, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivative Instruments	Presented below in tabular form is information on the location and amounts of derivative fair values in the Consolidated Condensed Balance Sheets and derivative gains and losses in the Consolidated Condensed Statements of Income: Fair Value of Derivative Instruments October 3, 2021 and March 31, 2021 Derivatives and Hedging Activities Designated as Cash Flow Hedges Derivatives and Hedging Activities Not Designated as Hedging Instruments October 3, 2021 March 31, 2021 October 3, 2021 March 31, 2021 Prepaid and other current assets: Lead forward contracts $ — $ — $ — $ — Foreign currency forward contracts 295 524 — — Total assets $ 295 $ 524 $ — $ — Accrued expenses: Lead forward contracts $ 2,913 $ 1,980 $ — $ — Foreign currency forward contracts — — 130 100 Total liabilities $ 2,913 $ 1,980 $ 130 $ 100
The Effect Of Derivative Instruments On Consolidated Condensed Statements Of Income	The Effect of Derivative Instruments on the Consolidated Condensed Statements of Income For the quarter ended October 3, 2021 Derivatives Designated as Cash Flow Hedges Pretax 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 $ (2,409) Cost of goods sold $ 817 Foreign currency forward contracts 442 Cost of goods sold 132 Total $ (1,967) $ 949 Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income on Derivatives Pretax Gain (Loss) Foreign currency forward contracts Other (income) expense, net $ 123 Total $ 123 The Effect of Derivative Instruments on the Consolidated Condensed Statements of Income For the quarter ended October 4, 2020 Derivatives Designated as Cash Flow Hedges Pretax 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 $ (2,219) Cost of goods sold $ (4,854) Foreign currency forward contracts (454) Cost of goods sold 257 Total $ (2,673) $ (4,597) Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income on Derivatives Pretax Gain (Loss) Foreign currency forward contracts Other (income) expense, net $ 260 Total $ 260 The Effect of Derivative Instruments on the Consolidated Condensed Statements of Income For the six months ended October 3, 2021 Derivatives Designated as Cash Flow Hedges Pretax 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 $ 5,163 Cost of goods sold $ 3,276 Foreign currency forward contracts 253 Cost of goods sold (28) Total $ 5,416 $ 3,248 Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income on Derivatives Pretax Gain (Loss) Foreign currency forward contracts Other (income) expense, net $ 117 Total $ 117 The Effect of Derivative Instruments on the Consolidated Condensed Statements of Income For the six months ended October 4, 2020 Derivatives Designated as Cash Flow Hedges Pretax 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 $ (3,493) Cost of goods sold $ (8,653) Foreign currency forward contracts (193) Cost of goods sold (26) Total $ (3,686) $ (8,679) Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income on Derivatives Pretax Gain (Loss) Foreign currency forward contracts Other (income) expense, net $ 372 Total 372

Warranty (Tables)

Warranty (Tables)	6 Months Ended
	Oct. 03, 2021
Product Warranties Disclosures [Abstract]
Analysis Of Changes In Liability For Product Warranties	An analysis of changes in the liability for product warranties is as follows: Quarter ended Six months ended October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Balance at beginning of period $ 59,167 $ 59,771 $ 58,962 $ 63,525 Current period provisions 2,331 7,683 7,661 14,657 Costs incurred (4,120) (8,662) (9,372) (19,972) Foreign currency translation adjustment (1,156) 1,520 (1,029) 2,102 Balance at end of period $ 56,222 $ 60,312 $ 56,222 $ 60,312

Restructuring Plans (Tables)

Restructuring Plans (Tables)	6 Months Ended
	Oct. 03, 2021
Restructuring and Related Activities [Abstract]
Reconciliation of Restructuring Reserve	Restructuring and exit charges for the second quarter and six months of fiscal 2022 by reportable segments are as follows: Quarter ended October 3, 2021 Energy Systems Motive Power Specialty Total Restructuring charges $ 161 $ 849 $ 3 $ 1,013 Exit charges — 1,827 17 1,844 Restructuring and other exit charges $ 161 $ 2,676 $ 20 $ 2,857 Six months ended October 3, 2021 Energy Systems Motive Power Specialty Total Restructuring charges $ 1,019 $ 1,281 $ 39 $ 2,339 Exit charges (370) 9,928 (1,208) 8,350 Restructuring and other exit charges $ 649 $ 11,209 $ (1,169) $ 10,689 A roll-forward of the restructuring reserve, excluding exit charges, is as follows: Balance as of March 31, 2021 $ 2,595 Accrued 2,339 Costs incurred (3,400) Foreign currency impact 49 Balance as of October 3, 2021 $ 1,583

Debt (Tables)

Debt (Tables)	6 Months Ended
	Oct. 03, 2021
Debt Disclosure [Abstract]
Long-Term Debt And Capital Lease Obligations	The following summarizes the Company’s long-term debt as of October 3, 2021 and March 31, 2021: October 3, 2021 March 31, 2021 Principal Unamortized Issuance Costs Principal Unamortized Issuance Costs Senior Notes $ 600,000 $ 4,505 $ 600,000 $ 5,106 Second Amended Credit Facility, due 2026 484,229 3,735 376,039 1,315 $ 1,084,229 $ 8,240 $ 976,039 $ 6,421 Less: Unamortized issuance costs 8,240 6,421 Long-term debt, net of unamortized issuance costs $ 1,075,989 $ 969,618

Retirement Plans (Tables)

Retirement Plans (Tables)	6 Months Ended
	Oct. 03, 2021
Retirement Benefits [Abstract]
Net Periodic Benefit Cost Related To Defined Benefit Pension Plans	The following tables present the components of the Company’s net periodic benefit cost related to its defined benefit pension plans: United States Plans International Plans Quarter ended Quarter ended October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Service cost $ — $ — $ 291 $ 252 Interest cost 130 133 360 348 Expected return on plan assets (129) (66) (555) (474) Amortization and deferral 5 132 297 259 Net periodic benefit cost $ 6 $ 199 $ 393 $ 385 United States Plans International Plans Six months ended Six months ended October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Service cost $ — $ — $ 590 $ 487 Interest cost 260 265 726 675 Expected return on plan assets (257) (131) (1,118) (921) Amortization and deferral 10 265 600 503 Net periodic benefit cost $ 13 $ 399 $ 798 $ 744

Stockholders' Equity and Nonc_2

Stockholders' Equity and Noncontrolling Interests (Tables)	6 Months Ended
	Oct. 03, 2021
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 the six months ended October 3, 2021: Shares outstanding as of March 31, 2021 42,753,020 Purchase of treasury stock (329,008) Shares issued under equity-based compensation plans, net of equity awards surrendered for option price and taxes 206,954 Shares outstanding as of October 3, 2021 42,630,966
Components Of Accumulated Other Comprehensive Income	The components of AOCI, net of tax, as of October 3, 2021 and March 31, 2021, are as follows: March 31, 2021 Before Reclassifications Amounts Reclassified from AOCI October 3, 2021 Pension funded status adjustment $ (20,947) $ — $ 473 $ (20,474) Net unrealized gain (loss) on derivative instruments 360 4,151 (2,487) 2,024 Foreign currency translation adjustment (95,296) (8,401) — (103,697) Accumulated other comprehensive (loss) income $ (115,883) $ (4,250) $ (2,014) $ (122,147)
Reclassification from Accumulated Other Comprehensive Income	The following table presents reclassifications from AOCI during the second quarter ended October 3, 2021: Components of AOCI Amounts Reclassified from AOCI Location of (Gain) Loss Recognized on Income Statement Derivatives in cash flow hedging relationships: Net unrealized gain on derivative instruments $ (949) Cost of goods sold Tax expense 222 Net unrealized gain on derivative instruments, net of tax $ (727) Defined benefit pension costs: Prior service costs and deferrals $ 302 Net periodic benefit cost, included in other (income) expense, net - See Note 13 Tax benefit (69) Net periodic benefit cost, net of tax $ 233 The following table presents reclassifications from AOCI during the six months ended October 3, 2021: Components of AOCI Amounts Reclassified from AOCI Location of (Gain) Loss Recognized on Income Statement Derivatives in cash flow hedging relationships: Net unrealized gain on derivative instruments $ (3,248) Cost of goods sold Tax expense 761 Net unrealized gain on derivative instruments, net of tax $ (2,487) Defined benefit pension costs: Prior service costs and deferrals $ 610 Net periodic benefit cost, included in other (income) expense, net - See Note 13 Tax benefit (137) Net periodic benefit cost, net of tax $ 473 The following table presents reclassifications from AOCI during the second quarter ended October 4, 2020: Components of AOCI Amounts Reclassified from AOCI Location of (Gain) Loss Recognized on Income Statement Derivatives in cash flow hedging relationships: Net unrealized loss on derivative instruments $ 4,597 Cost of goods sold Tax benefit (1,088) Net unrealized loss on derivative instruments, net of tax $ 3,509 Defined benefit pension costs: Prior service costs and deferrals $ 391 Net periodic benefit cost, included in other (income) expense, net - See Note 13 Tax benefit (86) Net periodic benefit cost, net of tax $ 305 The following table presents reclassifications from AOCI during the six months ended October 4, 2020: Components of AOCI Amounts Reclassified from AOCI Location of (Gain) Loss Recognized on Income Statement Derivatives in cash flow hedging relationships: Net unrealized loss on derivative instruments $ 8,679 Cost of goods sold Tax benefit (2,054) Net unrealized loss on derivative instruments, net of tax $ 6,625 Defined benefit pension costs: Prior service costs and deferrals $ 768 Net periodic benefit cost, included in other (income) expense, net - See Note 13 Tax benefit (172) Net periodic benefit cost, net of tax $ 596
Schedule of Change in Stockholders Equity	The following demonstrates the change in equity attributable to EnerSys stockholders and nonredeemable noncontrolling interests during the second quarter and six months ended October 3, 2021: (In Thousands , Except Per Share Data) Preferred Common Additional Paid-in Treasury Retained Accumulated Contra-Equity Total Non- Total Balance at March 31, 2021 $ — $ 555 $ 554,168 $ (563,481) $ 1,669,751 $ (115,883) $ (5,355) $ 1,539,755 $ 3,821 $ 1,543,576 Stock-based compensation — — 3,659 — — — — 3,659 — 3,659 Exercise of stock options — 1 386 — — — — 387 — 387 Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net — — (4,803) — — — — (4,803) — (4,803) Purchase of common stock — — — (31,512) — — — (31,512) — (31,512) Other — — 44 170 — — — 214 — 214 Net earnings — — — — 43,929 — — 43,929 — 43,929 Dividends ($0.175 per common share) — — 173 — (7,608) — — (7,435) — (7,435) Dissolution of joint venture — — — — — — — — (47) (47) Other comprehensive income: Pension funded status adjustment (net of tax benefit of $68) — — — — — 240 — 240 — 240 Net unrealized gain (loss) on derivative instruments (net of tax expense of $1,187) — — — — — 3,897 — 3,897 — 3,897 Foreign currency translation adjustment — — — — — 15,272 — 15,272 49 15,321 Balance at July 4, 2021 $ — $ 556 $ 553,627 $ (594,823) $ 1,706,072 $ (96,474) $ (5,355) $ 1,563,603 $ 3,823 $ 1,567,426 Stock-based compensation — — 5,765 — — — — 5,765 — 5,765 Exercise of stock options — 1 770 — — — — 771 — 771 Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net — — (4,197) — — — — (4,197) — (4,197) Contra equity - adjustment to indemnification receivable for acquisition related tax liability — — — — — — 1,354 1,354 — 1,354 Purchase of common stock — — — — — — — — — — Other — — 52 174 — — — 226 — 226 Net earnings — — — — 35,626 — — 35,626 — 35,626 Dividends ($0.175 per common share) — — 185 — (7,641) — — (7,456) — (7,456) Other comprehensive income: Pension funded status adjustment (net of tax benefit of $69) — — — — — 233 — 233 — 233 Net unrealized gain (loss) on derivative instruments (net of tax benefit of $(683)) — — — — — (2,233) — (2,233) — (2,233) Foreign currency translation adjustment — — — — — (23,673) — (23,673) 15 (23,658) Balance at October 3, 2021 $ — $ 557 $ 556,202 $ (594,649) $ 1,734,057 $ (122,147) $ (4,001) $ 1,570,019 $ 3,838 $ 1,573,857 The following demonstrates the change in equity attributable to EnerSys stockholders and nonredeemable noncontrolling interests during the second quarter and six months ended October 4, 2020: (In Thousands , Except Per Share Data) Preferred Common Additional Paid-in Treasury Retained Accumulated Contra-Equity Total Non- Total Balance at March 31, 2020 $ — $ 551 $ 529,100 $ (564,376) $ 1,556,980 $ (215,006) $ (6,724) $ 1,300,525 $ 3,537 $ 1,304,062 Stock-based compensation — — 5,053 — — — — 5,053 — 5,053 Exercise of stock options — 2 479 — — — — 481 — 481 Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net — — (3,135) — — — — (3,135) — (3,135) Purchase of common stock — — — — — — — — — — Other — — (123) 299 — — — 176 — 176 Net earnings — — — — 35,183 — — 35,183 — 35,183 Dividends ($0.175 per common share) — — 172 — (7,600) — — (7,428) — (7,428) Other comprehensive income: Pension funded status adjustment (net of tax benefit of $86) — — — — — 291 — 291 — 291 Net unrealized gain (loss) on derivative instruments (net of tax expense of $726) — — — — — 2,343 — 2,343 — 2,343 Foreign currency translation adjustment — — — — — 28,139 — 28,139 8 28,147 Balance at July 5, 2020 $ — $ 553 $ 531,546 $ (564,077) $ 1,584,563 $ (184,233) $ (6,724) $ 1,361,628 $ 3,545 $ 1,365,173 Stock-based compensation — — 5,533 — — — — 5,533 — 5,533 Exercise of stock options — 1 1,284 — — — — 1,285 — 1,285 Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net — — (1,467) — — — — (1,467) — (1,467) Contra equity - adjustment to indemnification receivable for acquisition related tax liability — — — — — — 1,451 1,451 — 1,451 Purchase of common stock — — — — — — — — — — Other — — (7) 224 — — — 217 — 217 Net earnings — — — — 35,731 — — 35,731 — 35,731 Dividends ($0.175 per common share) — — 203 — (7,654) — — (7,451) — (7,451) Other comprehensive income: Pension funded status adjustment (net of tax benefit of $86) — — — — — 305 — 305 — 305 Net unrealized gain (loss) on derivative instruments (net of tax expense of $454) — — — — — 1,470 — 1,470 — 1,470 Foreign currency translation adjustment — — — — — 32,689 — 32,689 144 32,833 Balance at October 4, 2020 $ — $ 554 $ 537,092 $ (563,853) $ 1,612,640 $ (149,769) $ (5,273) $ 1,431,391 $ 3,689 $ 1,435,080

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Oct. 03, 2021
Earnings Per Share [Abstract]
Schedule of Weighted Average Number of Shares	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. Quarter ended Six months ended October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Net earnings attributable to EnerSys stockholders $ 35,626 $ 35,731 $ 79,555 $ 70,914 Weighted-average number of common shares outstanding: Basic 42,575,576 42,521,659 42,637,953 42,453,774 Dilutive effect of: Common shares from exercise and lapse of equity awards, net of shares assumed reacquired 680,256 565,796 758,635 555,981 Diluted weighted-average number of common shares outstanding 43,255,832 43,087,455 43,396,588 43,009,755 Basic earnings per common share attributable to EnerSys stockholders $ 0.84 $ 0.84 $ 1.87 $ 1.67 Diluted earnings per common share attributable to EnerSys stockholders $ 0.82 $ 0.83 $ 1.83 $ 1.65 Anti-dilutive equity awards not included in diluted weighted-average common shares 288,018 149,616 226,702 267,940

Business Segments Business Segm

Business Segments Business Segments (Tables)	6 Months Ended
	Oct. 03, 2021
Segment Reporting [Abstract]
Selected Financial Data for Reportable Business Segments and Product Lines	Summarized financial information related to the Company's reportable segments for the second quarter and six months ended October 3, 2021 and October 4, 2020, is shown below: Quarter ended Six months ended October 3, 2021 October 4, 2020 October 3, 2021 October 4, 2020 Net sales by segment to unaffiliated customers (1) Energy Systems $ 369,839 $ 340,822 $ 741,045 $ 694,209 Motive Power 320,687 263,738 656,803 526,572 Specialty 100,869 103,842 208,440 192,545 Total net sales $ 791,395 $ 708,402 $ 1,606,288 $ 1,413,326 Operating earnings by segment Energy Systems $ 1,129 $ 22,997 $ 8,235 $ 45,082 Motive Power 40,996 24,149 91,630 51,425 Specialty 11,386 11,388 22,378 16,634 Inventory adjustment relating to exit activities - Motive Power (960) — (960) — Restructuring and other exit charges - Energy Systems (161) (1,331) (649) (1,843) Restructuring and other exit charges - Motive Power (2,676) (1,681) (11,209) (2,443) Restructuring and other exit charges - Specialty (20) (107) 1,169 (220) Total operating earnings (2) $ 49,694 $ 55,415 $ 110,594 $ 108,635 (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.

Revenue Recognition - (Addition

Revenue Recognition - (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 791,395	$ 708,402	$ 1,606,288	$ 1,413,326
Contract with customer, liability, current portion	17,561		17,561		$ 15,992
Contract with customer, liability, noncurrent portion	1,375		1,375		2,072
Revenue recognized	5,467	4,175	5,182	7,641
Unbilled contracts receivable	53,358		53,358		$ 46,451
Right to recover product	4,604		4,604
Refund liability	8,059		8,059
Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales	43,607	35,074	84,511	71,176
Service
Disaggregation of Revenue [Line Items]
Net sales	$ 90,112	$ 74,327	$ 172,630	$ 143,085

Revenue Recognition - (Remainin

Revenue Recognition - (Remaining Performance Obligation) (Details) $ in Thousands	Oct. 03, 2021USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 145,299
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-04
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 102,976
Remaining performance obligation, timing of satisfaction	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 35,962
Remaining performance obligation, timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 6,324
Remaining performance obligation, timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 37
Remaining performance obligation, timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, timing of satisfaction	1 year

Leases - (Additional Informatio

Leases - (Additional Information) (Details)	Oct. 03, 2021
Minimum
Lessee, Lease, Description [Line Items]
Contract term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Contract term	17 years

Leases - (Balance Sheet Classif

Leases - (Balance Sheet Classification) (Details) - USD ($) $ in Thousands	Oct. 03, 2021	Mar. 31, 2021
Leases [Abstract]
Operating lease right-of-use asset	$ 56,116	$ 62,159
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Operating lease current liabilities	$ 19,334	$ 21,774
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued expenses	Accrued expenses
Operating lease non-current liabilities	$ 39,025	$ 42,528
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Finance lease right-of-use asset	$ 460	$ 573
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant, and equipment, net	Property, plant, and equipment, net
Finance lease current liabilities	$ 220	$ 236
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued expenses	Accrued expenses
Finance lease non-current liabilities	$ 328	$ 435
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities

Leases - (Lease Cost) (Details)

Leases - (Lease Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Operating Leases:
Operating lease cost	$ 6,422	$ 6,745	$ 13,138	$ 13,681
Variable lease cost	2,354	1,613	4,927	3,732
Short term lease cost	1,753	1,578	3,570	3,406
Finance Leases:
Depreciation	59	46	119	88
Interest expense	7	7	15	14
Total	$ 10,595	$ 9,989	$ 21,769	$ 20,921

Leases - (Additional Informat_2

Leases - (Additional Information Related to Leases) (Details)	Oct. 03, 2021	Mar. 31, 2021
Operating Leases:
Weighted average remaining lease term (years)	5 years 8 months 12 days	5 years 6 months
Weighted average discount rate	5.09%	5.16%
Finance Leases:
Weighted average remaining lease term (years)	2 years 8 months 12 days	3 years 1 month 6 days
Weighted average discount rate	4.80%	4.81%

Leases - (Finance and Operating

Leases - (Finance and Operating Lease Maturity Schedules) (Details) $ in Thousands	Oct. 03, 2021USD ($)
Finance Leases
Six months ended March 31, 2022	$ 132
Year ended March 31, 2023	216
Year ended March 31, 2024	157
Year ended March 31, 2025	47
Year ended March 31, 2026	26
Thereafter	0
Total undiscounted lease payments	578
Present value discount	30
Lease liability	548
Operating Leases
Six months ended March 31, 2022	11,907
Year ended March 31, 2023	17,366
Year ended March 31, 2024	11,476
Year ended March 31, 2025	7,699
Year ended March 31, 2026	5,678
Thereafter	13,337
Total undiscounted lease payments	67,463
Present value discount	9,104
Lease liability	$ 58,359

Leases - (Supplemental Cash Flo

Leases - (Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Cash Flow, Lessee [Abstract]
Operating cash flows from finance leases	$ 7	$ 7	$ 15	$ 14
Operating cash flows from operating leases	6,484	6,739	13,249	13,660
Financing cash flows from finance leases	60	45	120	86
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	0	87	0	87
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 1,909	$ 955	$ 5,590	$ 7,132

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 03, 2021	Mar. 31, 2021
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets, gross amount	$ 555,618	$ 556,122
Total intangible assets, accumulated amortization	(141,972)	(125,224)
Total intangible assets, net amount	413,646	430,898
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross amount	298,178	298,576
Finite-lived intangible assets, accumulated amortization	(98,633)	(87,308)
Finite-lived intangible assets, net amount	199,545	211,268
Non-compete
Acquired Finite-Lived 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
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross amount	97,304	97,349
Finite-lived intangible assets, accumulated amortization	(34,168)	(29,561)
Finite-lived intangible assets, net amount	63,136	67,788
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, gross amount	148,103	148,164
Indefinite-lived intangible assets, accumulated amortization	(953)	(953)
Indefinite-lived intangible assets, net amount	147,150	147,211
Finite-lived intangible assets, gross amount	8,012	8,012
Finite-lived intangible assets, accumulated amortization	(4,197)	(3,381)
Finite-lived intangible assets, net amount	3,815	4,631
Licenses
Acquired Finite-Lived 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

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 8,329	$ 8,187	$ 16,748	$ 16,742
Amortization of intangible assets, remainder of 2022	15,786		15,786
Amortization of intangible assets, 2023	30,399		30,399
Amortization of intangible assets, 2024	27,544		27,544
Amortization of intangible assets, 2025	26,552		26,552
Amortization of intangible assets, 2026	$ 25,618		$ 25,618

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - (Goodwill) (Details) $ in Thousands	6 Months Ended
	Oct. 03, 2021USD ($)
Goodwill [Line Items]
Balance at March 31, 2021	$ 705,593
Foreign currency translation adjustment	(2,429)
Balance as of October 3, 2021	703,164
Energy Systems
Goodwill [Line Items]
Balance at March 31, 2021	279,676
Foreign currency translation adjustment	(1,461)
Balance as of October 3, 2021	278,215
Motive Power
Goodwill [Line Items]
Balance at March 31, 2021	327,055
Foreign currency translation adjustment	(720)
Balance as of October 3, 2021	326,335
Specialty
Goodwill [Line Items]
Balance at March 31, 2021	98,862
Foreign currency translation adjustment	(248)
Balance as of October 3, 2021	$ 98,614

Inventories - (Details)

Inventories - (Details) - USD ($) $ in Thousands	Oct. 03, 2021	Mar. 31, 2021
Inventory Disclosure [Abstract]
Raw materials	$ 203,548	$ 147,040
Work-in-process	117,130	97,715
Finished goods	320,320	273,492
Total	$ 640,998	$ 518,247

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - (Financial Assets and Liabilities) (Details) - USD ($) $ in Thousands	Oct. 03, 2021	Mar. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	$ (2,748)	$ (1,556)
Quoted Price in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	(2,748)	(1,556)
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	0	0
Lead forward contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	(2,913)	(1,980)
Lead forward contracts | Quoted Price in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	0	0
Lead forward contracts | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	(2,913)	(1,980)
Lead forward contracts | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	0	0
Foreign currency forward contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	165	424
Foreign currency forward contracts | Quoted Price in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	0	0
Foreign currency forward contracts | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	165	424
Foreign currency forward contracts | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	$ 0	$ 0

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - (Additional Information) (Details) - USD ($) $ in Thousands	Oct. 03, 2021	Mar. 31, 2021
4.375% Senior Notes due 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	4.375%
Long-term debt	$ 300,000
Face value of trades, percentage	106.00%	102.00%
5.00% Senior Notes due 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	5.00%
Long-term debt	$ 300,000
Face value of trades, percentage	103.00%	105.00%

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - (Carrying Amounts and Estimated Fair Values) (Details) - USD ($) $ in Thousands	Oct. 03, 2021	Mar. 31, 2021
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative asset	$ 0	$ 0
Senior Notes	600,000	600,000
Derivatives	2,748	1,556
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative asset	0	0
Senior Notes	625,890	621,000
Derivatives	$ 2,748	$ 1,556

Derivative Financial Instrume_3

Derivative Financial Instruments - (Additional Information) (Details) $ in Thousands, lb in Millions	Oct. 03, 2021USD ($)lb	Mar. 31, 2021USD ($)lb
Cost of Sales
Derivatives, Fair Value [Line Items]
Foreign currency cash flow hedge gain to be reclassified during next 12 months	$ 2,770
Lead forward contracts
Derivatives, Fair Value [Line Items]
Notional amount in pounds | lb	49	54.5
Fair value of hedges, net	$ 50,847	$ 50,567
Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Derivative notional amount	27,192	26,033
Foreign currency forward contracts | Derivatives and Hedging Activities Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Derivative notional amount	$ 26,027	$ 28,995

Derivative Financial Instrume_4

Derivative Financial Instruments - (Location and Amounts of Derivative Fair Values) (Details) - USD ($) $ in Thousands	Oct. 03, 2021	Mar. 31, 2021
Derivatives and Hedging Activities Designated as Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	$ 295	$ 524
Derivatives liabilities, fair value	2,913	1,980
Derivatives and Hedging Activities Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	0	0
Derivatives liabilities, fair value	130	100
Lead forward contracts | Derivatives and Hedging Activities Designated as Cash Flow Hedges | Prepaid and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	0	0
Lead forward contracts | Derivatives and Hedging Activities Designated as Cash Flow Hedges | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivatives liabilities, fair value	2,913	1,980
Lead forward contracts | Derivatives and Hedging Activities Not Designated as Hedging Instruments | Prepaid and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	0	0
Lead forward contracts | Derivatives and Hedging Activities Not Designated as Hedging Instruments | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivatives liabilities, fair value	0	0
Foreign currency forward contracts | Derivatives and Hedging Activities Designated as Cash Flow Hedges | Prepaid and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	295	524
Foreign currency forward contracts | Derivatives and Hedging Activities Designated as Cash Flow Hedges | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivatives liabilities, fair value	0	0
Foreign currency forward contracts | Derivatives and Hedging Activities Not Designated as Hedging Instruments | Prepaid and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	0	0
Foreign currency forward contracts | Derivatives and Hedging Activities Not Designated as Hedging Instruments | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivatives liabilities, fair value	$ 130	$ 100

Derivative Financial Instrume_5

Derivative Financial Instruments - (Derivatives Designated as Cash Flow Hedges) (Details) - Derivatives Designated as Cash Flow Hedges - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	$ (1,967)	$ (2,673)	$ 5,416	$ (3,686)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	949	(4,597)	3,248	(8,679)
Lead forward contracts | Cost of Sales
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	(2,409)	(2,219)	5,163	(3,493)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	817	(4,854)	3,276	(8,653)
Foreign currency forward contracts | Cost of Sales
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	442	(454)	253	(193)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	$ 132	$ 257	$ (28)	$ (26)

Derivative Financial Instrume_6

Derivative Financial Instruments - (Derivatives Not Designated as Hedging Instruments) (Details) - Derivatives Not Designated as Hedging Instruments - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives Not Designated as Hedging Instruments	$ 123	$ 260	$ 117	$ 372
Other Income Expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives Not Designated as Hedging Instruments	$ 123	$ 260	$ 117	$ 372

Income Taxes - (Additional Info

Income Taxes - (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Income Tax Disclosure [Abstract]
Additional tax benefit recognized			$ 1,883
Effective income tax rates	10.80%	13.90%	13700000.00%	14600000.00%
Foreign income as a percentage of worldwide income			76.00%	67.00%
Foreign effective income tax rates			9.90%	10.60%
Tax rate of Swiss subsidiary			8.00%	8.00%

Warranty - (Analysis of Changes

Warranty - (Analysis of Changes in the Liability) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Balance at beginning of period	$ 59,167	$ 59,771	$ 58,962	$ 63,525
Current period provisions	2,331	7,683	7,661	14,657
Costs incurred	(4,120)	(8,662)	(9,372)	(19,972)
Foreign currency translation adjustment	(1,156)	1,520	(1,029)	2,102
Balance at end of period	$ 56,222	$ 60,312	$ 56,222	$ 60,312

Restructuring Plans - (Addition

Restructuring Plans - (Additional Information) (Details) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Oct. 03, 2021USD ($)	Jul. 04, 2021USD ($)	Oct. 04, 2020USD ($)	Oct. 03, 2021USD ($)	Oct. 04, 2020USD ($)	Mar. 31, 2021USD ($)Employee	Mar. 31, 2020USD ($)	Mar. 31, 2019USD ($)
Restructuring Cost and Reserve [Line Items]
Expected remaining cost	$ 2,447			$ 2,447
Restructuring and other exit charges	2,857		$ 3,119	10,689	$ 4,506
Inventory adjustment relating to exit activities	960		$ 0	960	0
Proceeds from disposal of facility				3,268	$ 0
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,013			2,339
Exit charges	1,844			8,350
Restructuring and other exit charges	2,857			10,689
Restructuring costs incurred				3,400
Employee Severance | Energy Systems
Restructuring Cost and Reserve [Line Items]
Restructuring charges	161			1,019
Exit charges	0			(370)
Restructuring and other exit charges	161			649
Employee Severance | Motive Power
Restructuring Cost and Reserve [Line Items]
Restructuring charges	849			1,281
Exit charges	1,827			9,928
Restructuring and other exit charges	2,676			11,209
Employee Severance | Specialty
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3			39
Exit charges	17			(1,208)
Restructuring and other exit charges	20			(1,169)
Closure of Facility in Hagen, Germany
Restructuring Cost and Reserve [Line Items]
Expected additional restructuring charges	60,000			60,000
Estimated number of positions eliminated | Employee						200
Inventory adjustment relating to exit activities				960
Closure of Facility in Hagen, Germany | Cash charges
Restructuring Cost and Reserve [Line Items]
Expected additional restructuring charges	40,000			40,000
Closure of Facility in Hagen, Germany | Severance, Cash Charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges						$ 23,331
Closure of Facility in Hagen, Germany | Non Cash Charges
Restructuring Cost and Reserve [Line Items]
Expected additional restructuring charges	20,000			20,000
Closure of Facility in Hagen, Germany | Severance, Non Cash Charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges				3,635		7,946
Closure of Facility in Hagen, Germany | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges				6,663
Closure Of Facility In Targovishte Bulgaria
Restructuring Cost and Reserve [Line Items]
Expected remaining cost								$ 26,000
Restructuring and other exit charges						220	$ 5,123	$ 20,242
Proceeds from disposal of facility				1,489
Gain on disposal of facility				1,208
Closure of Facility in Samudio, Spain
Restructuring Cost and Reserve [Line Items]
Gain on disposal of facility		$ 1,779
Proceeds for sale of certain licenses and assets		$ 740
Richmond Kentucky Battery Formation Area Fire
Restructuring Cost and Reserve [Line Items]
Prepaid Insurance	$ 18,144			18,144
Richmond Kentucky Battery Formation Area Fire | Cleanup
Restructuring Cost and Reserve [Line Items]
Restructuring and other exit charges				15,316
Richmond Kentucky Battery Formation Area Fire | Business Interruption
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred				$ 5,156
Closure Of Facility In Vijayawada India
Restructuring Cost and Reserve [Line Items]
Exit charges						$ 1,509

Restructuring Plans - (Roll-for

Restructuring Plans - (Roll-forward of Restructuring Reserve) (Details) - Employee Severance $ in Thousands	6 Months Ended
	Oct. 03, 2021USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	$ 2,595
Accrued	2,339
Costs incurred	(3,400)
Foreign currency impact	49
Restructuring reserve, ending balance	$ 1,583

Debt - (Long-term Debt Includin

Debt - (Long-term Debt Including Capital Lease Obligations) (Details) - USD ($) $ in Thousands	Oct. 03, 2021	Mar. 31, 2021
Debt Instrument [Line Items]
Debt and lease obligation	$ 1,084,229	$ 976,039
Unamortized Issuance Costs	8,240	6,421
Long-term debt, net of unamortized issuance costs	1,075,989	969,618
Senior Notes
Debt Instrument [Line Items]
Long-term debt	600,000	600,000
Unamortized Issuance Costs	4,505	5,106
Second Amended Credit Facility, due 2026 | Second Amended Credit Facility, due 2026
Debt Instrument [Line Items]
Incremental term loan commitment	484,229	376,039
Unamortized Issuance Costs	$ 3,735	$ 1,315

Debt - (Additional Information)

Debt - (Additional Information) (Details)	Dec. 11, 2019USD ($)	Oct. 03, 2021USD ($)	Oct. 04, 2020USD ($)	Oct. 03, 2021USD ($)	Oct. 04, 2020USD ($)	Mar. 31, 2019USD ($)	Oct. 03, 2021CAD ($)	Mar. 31, 2021USD ($)	Mar. 31, 2019CAD ($)	Aug. 04, 2017USD ($)	Apr. 23, 2015USD ($)
Debt Instrument [Line Items]
Short-term debt		$ 36,006,000		$ 36,006,000				$ 34,153,000
Short-term debt, weighted average interest rate		2.00%		2.00%			2.00%	2.00%
Amortization expense relating to debt issuance costs and included in interest expense		$ 615,000	$ 518,000	$ 1,133,000	$ 1,036,000
Deferred issuance costs, net of accumulated amortization		8,240,000		8,240,000				$ 6,421,000
Maximum
Debt Instrument [Line Items]
Consideration transferred				250,000
Standby Letters of Credit
Debt Instrument [Line Items]
Stand by letters of credit		2,959,000		2,959,000				2,959,000
Senior Notes
Debt Instrument [Line Items]
Long-term debt		600,000,000		600,000,000				600,000,000
Line of Credit
Debt Instrument [Line Items]
Available lines of credit		688,959,000		688,959,000				697,875,000
Outstanding amount		111,084,000		111,084,000				$ 122,303,000
4.375% Senior Notes due 2027 | Senior Notes
Debt Instrument [Line Items]
Interest rate	4.375%
Long-term debt	$ 300,000,000
Proceeds from issuance of debt, net of debt issuance costs	$ 296,250,000
5.00% Senior Notes due 2023 | Senior Notes
Debt Instrument [Line Items]
Interest rate											5.00%
Long-term debt											$ 300,000,000
Amended Credit Facility, due 2022 | Secured Debt
Debt Instrument [Line Items]
Debt instrument, face amount										$ 150,000,000
Amended Credit Facility, due 2022 | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity										$ 600,000,000
Amended 2017 Term Loan | Secured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 449,105,000
Change in face amount						299,105,000
Amended 2017 Term Loan, Canadian Dollars | Secured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						99,105,000			$ 133,050,000
Amended 2017 Revolver | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						700,000,000
Amended 2017 Revolver | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Change in borrowing capacity						$ 100,000,000
Second Amended Term Loan | Secured Debt
Debt Instrument [Line Items]
Debt instrument, face amount		130,000,000		130,000,000
Change in face amount		(150,000,000)
Available lines of credit		214,229,000		214,229,000
Current portion of long-term debt		0		0
Second Amended Term Loan, Canadian Dollars | Secured Debt
Debt Instrument [Line Items]
Debt instrument, face amount		84,229,000		84,229,000			$ 106,440,000
Second Amended Revolver | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		850,000,000		850,000,000
Change in borrowing capacity		150,000,000
Optional increase in line of credit maximum borrowing capacity		350,000,000		350,000,000
Available lines of credit		$ 270,000,000		$ 270,000,000
Second Amended Credit Facility | Secured Debt and Line of Credit
Debt Instrument [Line Items]
Percentage of capital stock collateralizing debt		65.00%
Capitalized debt issuance costs		$ 2,952,000
Debt issuance costs written off		$ 128,000
Second Amended Credit Facility | Secured Debt and Line of Credit | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.25%
Second Amended Credit Facility | Secured Debt and Line of Credit | Federal Funds Effective Rate
Debt Instrument [Line Items]
Basis spread on variable rate		0.50%
Second Amended Credit Facility | Secured Debt and Line of Credit | Eurocurrency Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Second Amended Credit Facility | Secured Debt and Line of Credit | CDOR
Debt Instrument [Line Items]
Basis spread on variable rate		0.50%
Second Amended Credit Facility | Secured Debt and Line of Credit | Minimum | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.125%
Second Amended Credit Facility | Secured Debt and Line of Credit | Maximum | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		2.00%
Maximum Leverage Ratio | Minimum
Debt Instrument [Line Items]
Measurement input		3.50		3.50			3.50
Maximum Leverage Ratio | Maximum
Debt Instrument [Line Items]
Measurement input		4		4			4
Redemption Period One | 4.375% Senior Notes due 2027 | Senior Notes
Debt Instrument [Line Items]
Redemption percentage				100.00%
Redemption Period One | Second Amended Term Loan | Secured Debt
Debt Instrument [Line Items]
Debt instrument, periodic payment		$ 2,678,000
Redemption Period Two | 4.375% Senior Notes due 2027 | Senior Notes
Debt Instrument [Line Items]
Redemption percentage				100.00%
Redemption Period Two | Second Amended Term Loan | Secured Debt
Debt Instrument [Line Items]
Debt instrument, periodic payment		4,017,000
Redemption Period Three | 4.375% Senior Notes due 2027 | Senior Notes
Debt Instrument [Line Items]
Redemption percentage				101.00%
Redemption Period Three | Second Amended Term Loan | Secured Debt
Debt Instrument [Line Items]
Debt instrument, periodic payment		5,356,000
Debt Instrument, Redemption, Period Four | Second Amended Term Loan | Secured Debt
Debt Instrument [Line Items]
Debt instrument, periodic payment		$ 160,672,000

Retirement Plans - (Net Periodi

Retirement Plans - (Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
United States Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	130	133	260	265
Expected return on plan assets	(129)	(66)	(257)	(131)
Amortization and deferral	5	132	10	265
Net periodic benefit cost	6	199	13	399
International Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	291	252	590	487
Interest cost	360	348	726	675
Expected return on plan assets	(555)	(474)	(1,118)	(921)
Amortization and deferral	297	259	600	503
Net periodic benefit cost	$ 393	$ 385	$ 798	$ 744

Stock-Based Compensation - (Add

Stock-Based Compensation - (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grants (in shares)	4,173,554		4,173,554
Equity-based compensation expense	$ 5,765	$ 5,533	$ 9,424	$ 10,586
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting term			4 years
Stock units vested during period (in shares)			204,586
Awards outstanding (in shares)	907,265		907,265
Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option grants during period (in shares)			246,222
Vesting term			3 years
Stock options exercised (in shares)			37,390
TSRs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units vested during period (in shares)			46,048
Awards outstanding (in shares)	74,363		74,363
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units vested during period (in shares)			670
Awards outstanding (in shares)	77,519		77,519
Non-employee Directors | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock unit grants during period (in shares)			22,250
Management and Other Key Employees | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock unit grants during period (in shares)			229,600
Management and Other Key Employees | Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option grants outstanding (in shares)	992,791		992,791

Stockholders' Equity and Nonc_3

Stockholders' Equity and Noncontrolling Interests - (Change in the Number of Shares of Common Stock Outstanding) (Details) - shares	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021
Common Stock Outstanding Roll Forward
Shares outstanding, beginning balance (in shares)			42,753,020
Purchase of treasury stock (in shares)	(329,008)	0	(329,008)
Shares issued towards equity-based compensation plans, net of equity awards surrendered for option price and taxes (in shares)			206,954
Shares outstanding, ending balance (in shares)	42,630,966		42,630,966

Stockholders' Equity and Nonc_4

Stockholders' Equity and Noncontrolling Interests - (Treasury Stock) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020	Mar. 31, 2021
Equity [Abstract]
Purchase of treasury stock (in shares)	329,008	0	329,008
Treasury stock purchased during period, value	$ 31,512		$ 31,512	$ 0
Treasury stock, shares	13,101,229		13,101,229		12,799,790
Treasury shares issued (in shares)			7,569
Treasury shares issued (in dollars per share)			$ 62.55

Stockholders' Equity and Nonc_5

Stockholders' Equity and Noncontrolling Interests - (Components of Accumulated Other Comprehensive Income) (Details) $ in Thousands	6 Months Ended
	Oct. 03, 2021USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	$ 1,543,576
Ending balance	1,573,857
Pension funded status adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	(20,947)
Before Reclassifications	0
Amounts Reclassified from AOCI	(473)
Ending balance	(20,474)
Net unrealized gain (loss) on derivative instruments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	360
Before Reclassifications	4,151
Amounts Reclassified from AOCI	2,487
Ending balance	2,024
Foreign currency translation adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	(95,296)
Before Reclassifications	(8,401)
Amounts Reclassified from AOCI	0
Ending balance	(103,697)
Accumulated other comprehensive (loss) income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	(115,883)
Before Reclassifications	(4,250)
Amounts Reclassified from AOCI	2,014
Ending balance	$ (122,147)

Stockholders' Equity and Nonc_6

Stockholders' Equity and Noncontrolling Interests - (Reclassifications from AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net unrealized (gain) loss on derivative instruments	$ (612,575)	$ (530,842)	$ (1,234,249)	$ (1,060,789)
Derivatives in cash flow hedging relationships
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax expense (benefit)	222	(1,088)	761	(2,054)
Net of tax	(727)	3,509	(2,487)	6,625
Derivatives in cash flow hedging relationships | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net unrealized (gain) loss on derivative instruments	(949)	4,597	(3,248)	8,679
Defined benefit pension costs
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior service costs and deferrals	302	391	610	768
Tax expense (benefit)	(69)	(86)	(137)	(172)
Net of tax	$ 233	$ 305	$ 473	$ 596

Stockholders' Equity and Nonc_7

Stockholders' Equity and Noncontrolling Interests - (Other Disclosures) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Oct. 03, 2021	Jul. 04, 2021	Oct. 04, 2020	Jul. 05, 2020	Oct. 03, 2021	Oct. 04, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 1,567,426	$ 1,543,576	$ 1,365,173	$ 1,304,062	$ 1,543,576	$ 1,304,062
Stock-based compensation	5,765	3,659	5,533	5,053
Exercise of stock options	771	387	1,285	481
Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net	(4,197)	(4,803)	(1,467)	(3,135)
Contra equity - adjustment to indemnification receivable for acquisition related tax liability	1,354		1,451
Purchase of common stock	0	(31,512)	0	0
Other	226	214	217	176
Net earnings	35,626	43,929	35,731	35,183
Dividends	(7,456)	(7,435)	(7,451)	(7,428)
Dissolution of joint venture		(47)
Other comprehensive income:
Pension funded status adjustment, net of tax	233	240	305	291	473	596
Net unrealized gain (loss) on derivative instruments (net of tax)	(2,233)	3,897	1,470	2,343	1,664	3,813
Foreign currency translation adjustment (excludes losses related to redeemable noncontrolling interests)	(23,658)	15,321	32,833	28,147	(8,337)	60,980
Ending balance	$ 1,573,857	$ 1,567,426	$ 1,435,080	$ 1,365,173	$ 1,573,857	$ 1,435,080
Dividends per common share (in dollars per share)	$ 0.175	$ 0.175	$ 0.175	$ 0.175	$ 0.35	$ 0.35
Pension funded status adjustment, tax benefit (expense)	$ 69	$ 68	$ 86	$ 86
Net unrealized gain (loss) on derivative instrument, income tax expense (benefit)	683	1,187	454	726
Total EnerSys Stockholders’ Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,563,603	1,539,755	1,361,628	1,300,525	$ 1,539,755	$ 1,300,525
Stock-based compensation	5,765	3,659	5,533	5,053
Exercise of stock options	771	387	1,285	481
Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net	(4,197)	(4,803)	(1,467)	(3,135)
Contra equity - adjustment to indemnification receivable for acquisition related tax liability	1,354		1,451
Purchase of common stock	0	(31,512)	0	0
Other	226	214	217	176
Net earnings	35,626	43,929	35,731	35,183
Dividends	(7,456)	(7,435)	(7,451)	(7,428)
Other comprehensive income:
Pension funded status adjustment, net of tax	233	240	305	291
Net unrealized gain (loss) on derivative instruments (net of tax)	(2,233)	3,897	1,470	2,343
Foreign currency translation adjustment (excludes losses related to redeemable noncontrolling interests)	(23,673)	15,272	32,689	28,139
Ending balance	1,570,019	1,563,603	1,431,391	1,361,628	1,570,019	1,431,391
Preferred Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	0	0	0	0	0	0
Other comprehensive income:
Ending balance	0	0	0	0	0	0
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	556	555	553	551	555	551
Exercise of stock options	1	1	1	2
Other comprehensive income:
Ending balance	557	556	554	553	557	554
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	553,627	554,168	531,546	529,100	554,168	529,100
Stock-based compensation	5,765	3,659	5,533	5,053
Exercise of stock options	770	386	1,284	479
Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net	(4,197)	(4,803)	(1,467)	(3,135)
Other	52	44	(7)	(123)
Dividends	185	173	203	172
Other comprehensive income:
Ending balance	556,202	553,627	537,092	531,546	556,202	537,092
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(594,823)	(563,481)	(564,077)	(564,376)	(563,481)	(564,376)
Purchase of common stock	0	(31,512)	0	0
Other	174	170	224	299
Other comprehensive income:
Ending balance	(594,649)	(594,823)	(563,853)	(564,077)	(594,649)	(563,853)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,706,072	1,669,751	1,584,563	1,556,980	1,669,751	1,556,980
Net earnings	35,626	43,929	35,731	35,183
Dividends	(7,641)	(7,608)	(7,654)	(7,600)
Other comprehensive income:
Ending balance	1,734,057	1,706,072	1,612,640	1,584,563	1,734,057	1,612,640
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(96,474)	(115,883)	(184,233)	(215,006)	(115,883)	(215,006)
Other comprehensive income:
Pension funded status adjustment, net of tax	233	240	305	291
Net unrealized gain (loss) on derivative instruments (net of tax)	(2,233)	3,897	1,470	2,343
Foreign currency translation adjustment (excludes losses related to redeemable noncontrolling interests)	(23,673)	15,272	32,689	28,139
Ending balance	(122,147)	(96,474)	(149,769)	(184,233)	(122,147)	(149,769)
Contra-Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(5,355)	(5,355)	(6,724)	(6,724)	(5,355)	(6,724)
Contra equity - adjustment to indemnification receivable for acquisition related tax liability	1,354		1,451
Other comprehensive income:
Ending balance	(4,001)	(5,355)	(5,273)	(6,724)	(4,001)	(5,273)
Non- redeemable Non- Controlling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	3,823	3,821	3,545	3,537	3,821	3,537
Dissolution of joint venture		(47)
Other comprehensive income:
Foreign currency translation adjustment (excludes losses related to redeemable noncontrolling interests)	15	49	144	8
Ending balance	$ 3,838	$ 3,823	$ 3,689	$ 3,545	$ 3,838	$ 3,689

Earnings Per Share - (Reconcili

Earnings Per Share - (Reconciliation from Basic to Diluted Average Common Shares) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Earnings Per Share [Abstract]
Net earnings attributable to EnerSys stockholders	$ 35,626	$ 35,731	$ 79,555	$ 70,914
Basic weighted-average number of common shares outstanding (in shares)	42,575,576	42,521,659	42,637,953	42,453,774
Common shares from exercise and lapse of equity awards, net of shares assumed reacquired (in shares)	680,256	565,796	758,635	555,981
Diluted weighted-average number of common shares outstanding (in shares)	43,255,832	43,087,455	43,396,588	43,009,755
Basic earnings per common share attributable to EnerSys stockholders (in dollars per share)	$ 0.84	$ 0.84	$ 1.87	$ 1.67
Diluted earnings per common share attributable to EnerSys stockholders (in dollars per share)	$ 0.82	$ 0.83	$ 1.83	$ 1.65
Anti-dilutive equity awards not included in diluted weighted-average common shares (in shares)	288,018	149,616	226,702	267,940

Business Segments - (Details)

Business Segments - (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Segment Reporting Information [Line Items]
Net sales	$ 791,395	$ 708,402	$ 1,606,288	$ 1,413,326
Operating earnings by segment	49,694	55,415	110,594	108,635
Inventory adjustment relating to exit activities	(960)	0	(960)	0
Restructuring charges	(2,857)	(3,119)	(10,689)	(4,506)
Energy Systems | Americas
Segment Reporting Information [Line Items]
Net sales	369,839	340,822	741,045	694,209
Operating earnings by segment	1,129	22,997	8,235	45,082
Restructuring charges	(161)	(1,331)	(649)	(1,843)
Motive Power | EMEA
Segment Reporting Information [Line Items]
Net sales	320,687	263,738	656,803	526,572
Operating earnings by segment	40,996	24,149	91,630	51,425
Inventory adjustment relating to exit activities	(960)	0	(960)	0
Restructuring charges	(2,676)	(1,681)	(11,209)	(2,443)
Specialty | Asia
Segment Reporting Information [Line Items]
Net sales	100,869	103,842	208,440	192,545
Operating earnings by segment	11,386	11,388	22,378	16,634
Restructuring charges	$ (20)	$ (107)	$ 1,169	$ (220)

Subsequent Events - (Details)

Subsequent Events - (Details) - USD ($)	Nov. 04, 2021	Nov. 05, 2021	Oct. 03, 2021	Oct. 04, 2020	Oct. 03, 2021	Oct. 04, 2020
Subsequent Event [Line Items]
Purchase of treasury stock (in shares)			329,008	0	329,008
Treasury stock purchased during period, value			$ 31,512,000		$ 31,512,000	$ 0
Subsequent Event
Subsequent Event [Line Items]
Purchase of treasury stock (in shares)		742,811
Treasury stock purchased during period, value		$ 57,000,000
Share repurchase authorization		100,000,000
Increase in share repurchase authorization		$ 100,000,000
Common stock dividends (in dollars per share)	$ 0.175