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Consolidated Condensed Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019
Net sales	$ 704,924	$ 780,230
Cost of goods sold	529,947	578,718
Gross profit	174,977	201,512
Operating expenses	120,370	130,804
Restructuring and other exit charges	1,387	2,372
Operating earnings	53,220	68,336
Interest expense	10,165	10,898
Other (income) expense, net	1,462	(1,152)
Earnings before income taxes	41,593	58,590
Income tax expense	6,410	9,954
Net earnings	$ 35,183	48,636
Net earnings attributable to EnerSys stockholders		$ 48,636
Net earnings per common share attributable to EnerSys stockholders:
Basic earnings per common share attributable to EnerSys stockholders (in dollars per share)	$ 0.83	$ 1.14
Diluted earnings per common share attributable to EnerSys stockholders (in dollars per share)	0.82	1.13
Dividends per common share (in dollars per share)	$ 0.175	$ 0.175
Weighted average shares of common stock outstanding:
Basic weighted-average number of common shares outstanding (in shares)	42,385,888	42,656,339
Diluted weighted-average number of common shares outstanding (in shares)	42,932,054	43,118,434

Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Jul. 05, 2020	Mar. 31, 2020
Current assets:
Cash and cash equivalents	$ 384,379	$ 326,979
Accounts receivable, net of allowance for doubtful accounts: July 05, 2020 - $13,229; March 31, 2020 - $15,246	509,006	595,873
Total	510,598	519,460
Prepaid and other current assets	120,956	120,593
Total current assets	1,524,939	1,562,905
Property, plant, and equipment, net	493,173	480,014
Goodwill	676,667	663,936
Other intangible assets, net	450,606	455,685
Deferred taxes	55,631	55,803
Other assets	83,722	83,355
Total assets	3,284,738	3,301,698
Current liabilities:
Short-term debt	46,762	46,544
Accounts payable	242,955	281,873
Accrued expenses	253,564	271,902
Total current liabilities	543,281	600,319
Long-term debt, net of unamortized debt issuance costs	1,080,512	1,104,731
Deferred taxes	78,640	78,363
Other liabilities	217,132	214,223
Total liabilities	1,919,565	1,997,636
Commitments and contingencies
Equity:
Preferred Stock, $0.01 par value, 1,000,000 shares authorized, no shares issued or outstanding at July 5, 2020 and at March 31, 2020	0	0
Common Stock, 0.01 par value per share, 135,000,000 shares authorized, 55,251,879 shares issued and 42,465,194 shares outstanding at July 05, 2020; 55,114,808 shares issued and 42,323,305 shares outstanding at March 31, 2020	553	551
Additional paid-in capital	531,546	529,100
Treasury stock at cost, 12,786,685 shares held as of July 05, 2020 and 12,791,503 shares held as of March 31, 2020	(564,077)	(564,376)
Retained earnings	1,584,563	1,556,980
Contra equity - indemnification receivable	(6,724)	(6,724)
Accumulated other comprehensive income	(184,233)	(215,006)
Total EnerSys stockholders' equity	1,361,628	1,300,525
Noncontrolling interests	3,545	3,537
Total equity	1,365,173	1,304,062
Total liabilities and equity	$ 3,284,738	$ 3,301,698

Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jul. 05, 2020	Mar. 31, 2020
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 13,229	$ 15,246
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)	55,251,879	55,114,808
Common stock, shares outstanding (in shares)	42,465,194	42,323,305
Treasury stock (in shares)	12,786,685	12,791,503

Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net earnings	$ 35,183	$ 48,636
Other comprehensive income (loss):
Net unrealized gain (loss) on derivative instruments, net of tax	2,343	(2,329)
Pension funded status adjustment, net of tax	291	237
Foreign currency translation adjustment	28,147	(3,211)
Total other comprehensive income (loss), net of tax	30,781	(5,303)
Total comprehensive income	65,964	43,333
Comprehensive gain (loss) attributable to noncontrolling interests	8	(83)
Comprehensive income attributable to EnerSys stockholders	$ 65,956	$ 43,416

Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019
Cash flows from operating activities
Net earnings	$ 35,183	$ 48,636
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	23,657	20,725
Write-off of assets relating to exit activities	471	802
Derivatives not designated in hedging relationships:
Net gains	(262)	(34)
Cash settlements	467	(376)
Provision for doubtful accounts	96	1,105
Deferred income taxes	(54)	37
Non-cash interest expense	518	378
Stock-based compensation	5,053	3,874
Gain on disposal of property, plant, and equipment	73	21
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	92,752	2,097
Inventories	14,852	(18,937)
Prepaid and other current assets	2,672	(7,033)
Other assets	718	1,841
Accounts payable	(40,609)	(6,797)
Accrued expenses	(18,571)	(16,275)
Other liabilities	(452)	320
Net cash provided by operating activities	116,564	30,384
Cash flows from investing activities
Capital expenditures	(26,330)	(17,315)
Proceeds from disposal of property, plant, and equipment	50	44
Net cash used in investing activities	(26,280)	(17,271)
Cash flows from financing activities
Net repayments on short-term debt	(987)	(19,499)
Repayments of 2017 Term Loan	(8,402)	(5,645)
Option proceeds	479	38
Payment of taxes related to net share settlement of equity awards	(3,135)	(6,081)
Purchase of treasury stock	0	(23,029)
Dividends paid to stockholders	(7,428)	(7,499)
Other	11	(27)
Net cash used by financing activities	(39,462)	(51,742)
Effect of exchange rate changes on cash and cash equivalents	6,578	1,530
Net increase (decrease) in cash and cash equivalents	57,400	(37,099)
Cash and cash equivalents at beginning of period	326,979	299,212
Cash and cash equivalents at end of period	384,379	262,113
Amended Credit Facility, due 2022
Cash flows from financing activities
Proceeds from borrowings	35,000	95,000
Repayments of 2017 Revolver borrowings	$ (55,000)	$ (85,000)

Basis of Presentation

3 Months Ended

Jul. 05, 2020

Accounting Policies [Abstract]

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 months ended July 5, 2020 are not necessarily indicative of the results that may be expected for the fiscal year ending March 31, 2021.

The Consolidated Condensed Balance Sheet at March 31, 2020 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 2020 Annual Report on Form 10-K (SEC File No. 001-32253), which was filed on June 1, 2020 (the “2020 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 2021 end on July 5, 2020, October 4, 2020, January 3, 2021, and March 31, 2021, respectively. The four quarters in fiscal 2020 ended on June 30, 2019, September 29, 2019, December 29, 2019, and March 31, 2020, 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 June 2016, the FASB, issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326)”: Measurement of Credit Losses on Financial Instruments, which changes the recognition model for the impairment of financial instruments, including accounts receivable, loans and held-to-maturity debt securities, among others. The guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. In contrast to current guidance, which considers current information and events and utilizes a probable threshold, (an “incurred loss” model), ASU 2016–13 mandates an “expected loss” model. The expected loss model: (i) estimates the risk of loss even when risk is remote, (ii) estimates losses over the contractual life, (iii) considers past events, current conditions and reasonable supported forecasts and (iv) has no recognition threshold. The Company adopted the standard effective April 1, 2020 and the adoption did not have a material impact on the Company's operating results, financial position or cash flows. However, the adoption resulted in modifying the Company's policies for accounts receivable.

The Company estimates the allowance for credit losses in relation to accounts receivable based on relevant qualitative and quantitative information about historical events, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported accounts receivable. Subsequent to April 1, 2020, accounts receivable are recorded at amortized cost less an allowance for expected credit losses. The Company maintains an allowance for credit losses for the expected failure or inability of its customers to make required payments. The Company recognizes the allowance for expected credit losses at inception and reassesses quarterly based on management’s expectation of the asset’s collectability. The allowance is based on multiple factors including historical experience with bad debts, the credit quality of the customer base, the aging of such receivables and current macroeconomic conditions, as well as management’s expectations of conditions in the future. The Company’s allowance for uncollectible accounts receivable is based on management’s assessment of the collectability of assets pooled together with similar risk characteristics. The Company then adjusts the historical credit loss percentage by current and forecasted economic conditions. The Company then includes a baseline credit loss percentage into the historical credit loss percentage for each aging category to reflect the potential impact of the current and economic conditions. Such a baseline calculation will be adjusted further if changes in the economic environment impacts the Company's expectation for future credit losses.

The following table sets forth the changes in the Company's allowance for doubtful accounts for the first quarter ended July 5, 2020:


Allowance for doubtful accounts:	Balance at Beginning of Period		Provision for doubtful debts		Write-offs, net of recoveries and other		Balance at End of Period
First quarter ended July 5, 2020	$	15,246	$	96	$	(2,113)	$	13,229

Accounting Pronouncements Issued But Not Adopted as of July 5, 2020

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 is currently assessing the potential impact that the adoption will have on its consolidated financial statements.

In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848)”: Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides temporary optional expedients to ease the financial reporting burdens of the expected market transition from London Interbank Offered Rate (LIBOR) to an alternative reference rate such as Secured Overnight Financing Rate (SOFR). The guidance was effective upon issuance and generally can be applied through December 31, 2022. The Company is currently assessing the potential impact that the adoption will have on its 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 of 2019 (“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	3 Months Ended
Revenue Recognition	Jul. 05, 2020
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 first quarter of fiscal 2021 and 2020 amounted to $68,758 and $79,147, respectively. A small portion of the Company's customer arrangements obligate 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 first quarter of fiscal 2021 and 2020 amounted to $36,102 and $41,495, respectively. On July 5, 2020, the aggregate transaction price allocated to unsatisfied (or partially unsatisfied) performance obligations was approximately $92,632, of which, the Company estimates that approximately $66,604 will be recognized as revenue in fiscal 2021, $24,149 in fiscal 2022, $1,808 in fiscal 2023, $18 in fiscal 2024 and $53 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 July 5, 2020, the current and non-current portion of contract liabilities were $14,941 and $8,314, respectively. As of March 31, 2020, the current and non-current portion of contract liabilities were $17,342 and $8,356, respectively. Revenues recognized during the first quarter of fiscal 2021 and 2020 that were included in the contract liability at the beginning of the year, amounted to $3,466 and $4,467, respectively. Amounts representing work completed and not billed to customers represent contract assets and were $44,792 and $39,048 as of July 5, 2020 and March 31, 2020, 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 July 5, 2020, the right of return asset related to the value of inventory anticipated to be returned from customers was $4,265 and refund liability representing amounts estimated to be refunded to customers was $6,970.

Leases

3 Months Ended

Jul. 05, 2020

Leases [Abstract]

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 as incurred.

The following table presents lease assets and liabilities and their balance sheet classification:


	Classification	As of July 5, 2020		As of March 31, 2020
Operating Leases:
Right-of-use assets	Other assets	$	71,124	$	70,045
Operating lease current liabilities	Accrued expenses	21,891		21,128
Operating lease non-current liabilities	Other liabilities	51,461		51,215
Finance Leases:
Right-of-use assets	Property, plant, and equipment, net	$	513	$	540
Finance lease current liabilities	Accrued expenses	169		162
Finance lease non-current liabilities	Other liabilities	375		407

The components of lease expense for the first quarter ended July 5, 2020 and June 30, 2019 were as follows:


	Classification	Quarter ended July 5, 2020		Quarter ended June 30, 2019
Operating Leases:
Operating lease cost	Operating expenses	$	6,936	$	7,295
Variable lease cost	Operating expenses	2,119		1,706
Short term lease cost	Operating expenses	1,829		2,184
Finance Leases:
Depreciation	Operating expenses	$	42	$	143
Interest expense	Interest expense	7		12
Total		$	10,933	$	11,340

The following table presents the weighted average lease term and discount rates for leases as of July 5, 2020:


Operating Leases:
Weighted average remaining lease term						6 years
Weighted average discount rate						5.11%
Finance Leases:
Weighted average remaining lease term						3.2 years
Weighted average discount rate						4.92%

The following table presents future payments due under leases reconciled to lease liabilities as of July 5, 2020:


	Finance Leases		Operating Leases
Nine months ended March 31, 2021	$	149	$	19,170
Year ended March 31,
2022	201		21,086
2023	158		14,239
2024	107		8,866
2025	15		5,641
Thereafter	10		16,763
Total undiscounted lease payments	640		85,765
Present value discount	96		12,413
Lease liability	$	544	$	73,352

The following table presents supplemental disclosures of cash flow information related to leases for the first quarter ended July 5, 2020 and June 30, 2019:


	Quarter ended July 5, 2020		Quarter ended June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$	7	$	12
Operating cash flows from operating leases	6,921		7,213
Financing cash flows from finance leases	41		142
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	$	—	$	—
Right-of-use assets obtained in exchange for new operating lease liabilities	6,177		2,628

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 as incurred.

The following table presents lease assets and liabilities and their balance sheet classification:


	Classification	As of July 5, 2020		As of March 31, 2020
Operating Leases:
Right-of-use assets	Other assets	$	71,124	$	70,045
Operating lease current liabilities	Accrued expenses	21,891		21,128
Operating lease non-current liabilities	Other liabilities	51,461		51,215
Finance Leases:
Right-of-use assets	Property, plant, and equipment, net	$	513	$	540
Finance lease current liabilities	Accrued expenses	169		162
Finance lease non-current liabilities	Other liabilities	375		407

The components of lease expense for the first quarter ended July 5, 2020 and June 30, 2019 were as follows:


	Classification	Quarter ended July 5, 2020		Quarter ended June 30, 2019
Operating Leases:
Operating lease cost	Operating expenses	$	6,936	$	7,295
Variable lease cost	Operating expenses	2,119		1,706
Short term lease cost	Operating expenses	1,829		2,184
Finance Leases:
Depreciation	Operating expenses	$	42	$	143
Interest expense	Interest expense	7		12
Total		$	10,933	$	11,340

The following table presents the weighted average lease term and discount rates for leases as of July 5, 2020:


Operating Leases:
Weighted average remaining lease term						6 years
Weighted average discount rate						5.11%
Finance Leases:
Weighted average remaining lease term						3.2 years
Weighted average discount rate						4.92%

The following table presents future payments due under leases reconciled to lease liabilities as of July 5, 2020:


	Finance Leases		Operating Leases
Nine months ended March 31, 2021	$	149	$	19,170
Year ended March 31,
2022	201		21,086
2023	158		14,239
2024	107		8,866
2025	15		5,641
Thereafter	10		16,763
Total undiscounted lease payments	640		85,765
Present value discount	96		12,413
Lease liability	$	544	$	73,352

The following table presents supplemental disclosures of cash flow information related to leases for the first quarter ended July 5, 2020 and June 30, 2019:


	Quarter ended July 5, 2020		Quarter ended June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$	7	$	12
Operating cash flows from operating leases	6,921		7,213
Financing cash flows from finance leases	41		142
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	$	—	$	—
Right-of-use assets obtained in exchange for new operating lease liabilities	6,177		2,628

Acquisitions

3 Months Ended

Jul. 05, 2020

Business Combinations [Abstract]

Acquisitions

Acquisition

NorthStar

In fiscal 2020, the Company completed the acquisition of N Holding, AB (“NorthStar”) for $77,777 in cash consideration and the assumption of $107,018 in debt, which was funded using existing cash and credit facilities. NorthStar, through its direct and indirect subsidiaries, manufactures and distributes thin plate pure lead (TPPL) batteries and battery enclosures. NorthStar has two large manufacturing facilities in Springfield, Missouri. The Company acquired tangible and intangible assets, including trademarks, technology, customer relationships and goodwill. Based on valuations performed, trademarks were valued at $6,000, technology at $19,000, customer relationships at $9,000, and goodwill was recorded at $73,788. As a result of the change in operating and reportable segments discussed in Note 17, goodwill associated with the acquisition of NorthStar has been allocated to the Energy Systems and Specialty segments on a relative fair value basis. The useful lives of technology were estimated at 10 years, customer relationships were estimated at 15 to 18 years and trademarks were estimated at 5 years. Goodwill deductible for tax purposes is $72,056.

The results of the NorthStar acquisition have been included in the Company’s Energy Systems and Specialty segments, respectively, from the date of acquisition. Pro forma earnings and earnings per share computations have not been presented as this acquisition is not considered material.

Other Intangible Assets

Information regarding the Company’s other intangible assets are as follows:


	Balance as of
	July 5, 2020										March 31, 2020
	Gross Amount		Accumulated Amortization		Net Amount		Gross Amount		Accumulated Amortization		Net Amount
Indefinite-lived intangible assets:
Trademarks	$	147,749	$	(957)	$	146,792	$	147,356	$	(953)	$	146,403
Finite-lived intangible assets:
Customer relationships	294,732		(70,685)		224,047		292,155		(64,855)		227,300
Non-compete	3,038		(2,824)		214		3,021		(2,817)		204
Technology	96,536		(22,746)		73,790		96,047		(20,349)		75,698
Trademarks	8,008		(2,245)		5,763		8,008		(1,928)		6,080
Licenses	1,196		(1,196)		—		1,196		(1,196)		—
Total	$	551,259	$	(100,653)	$	450,606	$	547,783	$	(92,098)	$	455,685

The Company’s amortization expense related to finite-lived intangible assets was $8,555 for the first quarter of fiscal 2021, compared to $7,316 for the first quarter of fiscal 2020. The expected amortization expense based on the finite-lived intangible assets as of July 5, 2020, is $24,104 for the remainder of fiscal 2021, $32,420 in fiscal 2022, $31,122 in fiscal 2023, $27,725 in fiscal 2024 and $26,494 in fiscal 2025.

Inventories

3 Months Ended

Jul. 05, 2020

Inventory Disclosure [Abstract]

Inventories

Inventories, net consist of:


	July 5, 2020		March 31, 2020
Raw materials	$	144,185	$	141,906
Work-in-process	88,091		91,520
Finished goods	278,322		286,034
Total	$	510,598	$	519,460

Fair Value of Financial Instruments

3 Months Ended

Jul. 05, 2020

Fair Value Disclosures [Abstract]

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 July 5, 2020 and March 31, 2020, and the basis for that measurement:


	Total Fair Value Measurement July 5, 2020		Quoted Price in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Lead forward contracts	$	3	$	—	$	3	$	—
Foreign currency forward contracts	93		—		93		—
Total derivatives	$	96	$	—	$	96	$	—


	Total Fair Value Measurement March 31, 2020		Quoted Price in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Lead forward contracts	$	(2,433)	$	—	$	(2,433)	$	—
Foreign currency forward contracts	1		—		1		—
Total derivatives	$	(2,432)	$	—	$	(2,432)	$	—

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 its 2020 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 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 2027 (the “2027 Notes”), with an original face value of $300,000. The Company's 5.00% Senior Notes due 2023 (the “2023 Notes”), with an original face value of $300,000, were issued in April 2015. The fair value of the 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 99% and 94% of face value on July 5, 2020 and March 31, 2020, respectively. The 2023 Notes were trading at approximately 103% and 97% of face value on July 5, 2020 and March 31, 2020, respectively.

The carrying amounts and estimated fair values of the Company’s derivatives and Senior Notes at July 5, 2020 and March 31, 2020 were as follows:


	July 5, 2020						March 31, 2020
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial assets:
Derivatives ⁽¹⁾	$	96	$	96	$	—	$	—
Financial liabilities:
Senior Notes ⁽²⁾	$	600,000	$	606,000	$	600,000	$	573,000
Derivatives ⁽¹⁾	—		—		2,432		2,432

(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 July 5, 2020 and March 31, 2020).

(2)The fair value amount of the Senior Notes at July 5, 2020 and March 31, 2020 represent the trading value of the instruments.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Derivative Financial Instruments

3 Months Ended

Jul. 05, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

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 July 5, 2020 and March 31, 2020, the Company has hedged the price to purchase approximately 24.0 million pounds and 35.0 million pounds of lead, respectively, for a total purchase price of $19,299 and $30,078, 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 July 5, 2020 and March 31, 2020, the Company had entered into a total of $9,062 and $34,008, respectively, of such contracts.

In the coming twelve months, the Company anticipates that $4,569 of pretax loss relating to lead and foreign currency forward contracts will be reclassified from AOCI 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 July 5, 2020 and March 31, 2020, the notional amount of these contracts was $19,618 and $42,232, 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

July 5, 2020 and March 31, 2020


	Derivatives and Hedging Activities Designated as Cash Flow Hedges						Derivatives and Hedging Activities Not Designated as Hedging Instruments
	July 5, 2020		March 31, 2020		July 5, 2020		March 31, 2020
Prepaid and other current assets:
Lead forward contracts	$	3	$	—	$	—	$	—
Foreign currency forward contracts	72		—		21		375
Total assets	$	75	$	—	$	21	$	375
Accrued expenses:
Lead forward contracts	$	—	$	2,433	$	—	$	—
Foreign currency forward contracts	—		374		—		—
Total liabilities	$	—	$	2,807	$	—	$	—

The Effect of Derivative Instruments on the Consolidated Condensed Statements of Income

For the quarter ended July 5, 2020


Derivatives Designated as Cash Flow Hedges	Pretax Gain (Loss) Recognized in AOCI on Derivatives (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	$	(1,274)	Cost of goods sold	$	(3,799)
Foreign currency forward contracts	261		Cost of goods sold	(283)
Total	$	(1,013)		$	(4,082)


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	$	262
Total		$	262

The Effect of Derivative Instruments on the Consolidated Condensed Statements of Income

For the quarter ended June 30, 2019


Derivatives Designated as Cash Flow Hedges	Pretax Gain (Loss) Recognized in AOCI on Derivatives (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	$	(2,494)	Cost of goods sold	$	441
Foreign currency forward contracts	103		Cost of goods sold	217
Total	$	(2,391)		$	658


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	$	34
Total		$	34

Income Taxes	3 Months Ended
Income Taxes	Jul. 05, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s income tax provision consists of federal, state and foreign income taxes. The tax provision for the first quarter of fiscal 2021 and 2020 was based on the estimated effective tax rates applicable for the full years ending March 31, 2021 and March 31, 2020, 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 Company recorded a deferred tax asset of $22,500 during fiscal 2020 related to the amortizable goodwill. Based on further discussions with the Swiss tax authority, the Company recorded an additional income tax benefit of $1,883 during the first quarter of fiscal 2021. The consolidated effective income tax rates for the first quarter of fiscal 2021 and 2020 were 15.4% and 17.0%, respectively. The rate decrease in the first quarter of fiscal 2021 compared to the comparable prior year quarter is primarily due to Swiss tax reform and changes in the mix of earnings among tax jurisdictions. Foreign income as a percentage of worldwide income is estimated to be 69% for fiscal 2021 compared to 64% for fiscal 2020. The foreign effective tax rates for the first quarter of fiscal 2021 and 2020 were 9% and 11.5%, respectively. The rate decrease compared to the prior year period is primarily due to Swiss tax reform and changes in the mix of earnings among tax jurisdictions. Income from the Company's Swiss subsidiary comprised a substantial portion of the Company's overall foreign mix of income and was taxed at an effective income tax rate of approximately 6% in both the current and prior year quarter of fiscal 2021 and fiscal 2020.

Warranty

3 Months Ended

Jul. 05, 2020

Product Warranties Disclosures [Abstract]

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
	July 5, 2020		June 30, 2019
Balance at beginning of period	$	63,525	$	54,568
Current period provisions	6,974		7,519
Costs incurred	(11,310)		(5,948)

Foreign currency translation adjustment	582		40
Balance at end of period	$	59,771	$	56,179

Commitments, Contingencies and Litigation	3 Months Ended
Commitments, Contingencies and Litigation	Jul. 05, 2020
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 Annual Report on Form 10-K for the fiscal year ended March 31, 2020. The Company settled the Belgian regulatory proceeding in February 2016 by acknowledging certain anticompetitive practices and conduct and agreeing to pay a fine of $1,962, which was paid in March 2016. With respect to the Belgian regulatory matter, during the first quarter of fiscal 2019, the Company paid $2,402 towards certain aspects related to this matter, which are under appeal. As of July 5, 2020 and March 31, 2020, the Company did not have a reserve balance related to these matters. The foregoing estimate of losses is based upon currently available information for these proceedings. However, 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 is responsible for certain cleanup obligations at the former Yuasa battery facility in Sumter, South Carolina, that predates its ownership of this facility. This manufacturing facility was closed in 2001 and the Company established a reserve for this facility, which was $1,060 as of July 5, 2020 and March 31, 2020. Based on current information, the Company’s management believes this reserve is adequate to satisfy the Company’s environmental liabilities at this facility. This facility is separate from the Company’s current metal fabrication facility in Sumter. 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 for more details.

Restructuring Plans

3 Months Ended

Jul. 05, 2020

Restructuring and Related Activities [Abstract]

Restructuring Plans

Restructuring and other Exit Charges

Restructuring Plans

As disclosed in the Company's Form 10-K for the year ended March 31, 2020, 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 $6,500 remaining to be incurred by the end of fiscal 2021. The charges for the first quarter of fiscal 2021 relate to severance payments and are presented by reportable segments as follows:


	Energy Systems		Motive Power		Specialty		Total
Restructuring charges	$	507	$	762	$	134	$	1,403

A roll-forward of the restructuring reserve is as follows:


Balance as of March 31, 2020	$	3,325
Accrued	1,403
Costs incurred	(1,291)
Foreign currency impact	140
Balance as of July 5, 2020	$	3,577

Exit Charges

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 $30,000 for all these actions, 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 the first quarter of fiscal 2021, in keeping with its strategy of exiting the manufacture of batteries for diesel-electric submarines, the Company continued to execute further actions which resulted in a non-material net impact from the cash and non-cash charges.

Richmond, Kentucky Plant Fire

In fiscal 2020, a fire broke out in the battery formation area of the Company's Richmond, Kentucky motive power production facility. The Company maintains insurance policies for both property damage and business interruption and are finishing cleanup and repair. The Company estimates that the total claim, including the replacement of inventory and equipment, the cleanup and repairs to the building, as well as the claim for business interruption may exceed $50,000.

In fiscal 2020, the Company recorded $17,037 of damages caused to its fixed assets and inventories, as well as for cleanup, asset replacement and other ancillary activities directly associated with the fire and received $12,000 in advances related to its initial claims for recovery from its property and casualty insurance carriers.

During the first quarter of fiscal 2021, the Company recorded a further charge of $9,274 for cleanup and received $10,000 in advances from the insurance carriers. Accumulated charges relating to the fire through July 5, 2020 were $26,311 and advances received from the property and casualty insurance carriers were $22,000.

The Company also received $8,700 through July 5, 2020, of which $3,700 was recorded in the first quarter of fiscal 2021 and $5,000 in fiscal 2020, relating to a partial settlement of its claim for business interruption which was recorded as a reduction to cost of goods sold.

Debt

3 Months Ended

Jul. 05, 2020

Debt Disclosure [Abstract]

Debt

The following summarizes the Company’s long-term debt as of July 5, 2020 and March 31, 2020:


	July 5, 2020						March 31, 2020
	Principal		Unamortized Issuance Costs		Principal		Unamortized Issuance Costs
Senior Notes	$	600,000	$	6,006	$	600,000	$	6,306
Amended Credit Facility, due 2022	488,487		1,969		513,224		2,187

	$	1,088,487	$	7,975	$	1,113,224	$	8,493
Less: Unamortized issuance costs	7,975				8,493
Long-term debt, net of unamortized issuance costs	$	1,080,512			$	1,104,731

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. The 2027 Notes are unsecured and unsubordinated obligations of the Company. The 2027 Notes are fully and unconditionally guaranteed, jointly and severally, by certain of its subsidiaries that are guarantors under the Amended Credit Facility. 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.

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 Amended Credit Facility. These guarantees are unsecured and unsubordinated obligations of such guarantors.

2017 Credit Facility and Subsequent Amendment

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 consists of $449,105 senior secured term loans (the “Amended 2017 Term Loan”), including a CAD 133,050 ($99,105) term loan and a $700,000 senior secured revolving credit facility (the “Amended 2017 Revolver”). The amendment resulted in an increase of the 2017 Term Loan and the 2017 Revolver by $299,105 and $100,000, respectively.

As of July 5, 2020, the Company had $88,000 outstanding under the Amended 2017 Revolver and $400,487 under the Amended 2017 Term Loan.

Subsequent to the amendment, the quarterly installments payable on the Amended 2017 Term Loan are $5,645 beginning December 31, 2018, $8,468 beginning December 31, 2019 and $11,290 beginning December 31, 2020 with a final payment of $320,000 on September 30, 2022. The Amended Credit Facility may be increased by an aggregate amount of $325,000 in revolving commitments and / or one or more new tranches of term loans, under certain conditions. Both the Amended 2017 Revolver and the Amended 2017 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 1.25% and 2.00% (currently 1.50% 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%. Obligations under the 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 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 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. Effective December 7, 2018 through December 28, 2019, the maximum leverage ratio was increased to 4.00x. On December 29, 2019, the maximum leverage ratio returned to 3.50x.

The current portion of the Amended 2017 Term Loan of $42,009 is classified as long-term debt as the Company expects to refinance the future quarterly payments with revolver borrowings under the Amended Credit Facility.

Short-Term Debt

As of July 5, 2020 and March 31, 2020, the Company had $46,762 and $46,544, respectively, of short-term borrowings. The weighted average interest rate on these borrowings was approximately 2% at July 5, 2020 and 3% at March 31, 2020.

Letters of Credit

As of July 5, 2020 and March 31, 2020, the Company had standby letters of credit of $7,720.

Debt Issuance Costs

Amortization expense, relating to debt issuance costs, included in interest expense was $518 and $378, respectively, for the quarters ended July 5, 2020 and June 30, 2019. Debt issuance costs, net of accumulated amortization, totaled $7,975 and $8,493, respectively, at July 5, 2020 and March 31, 2020.

Available Lines of Credit

As of July 5, 2020 and March 31, 2020, the Company had available and undrawn, under all its lines of credit, $701,255 and $693,640, respectively, including $93,561 and $105,946, respectively, of uncommitted lines of credit as of July 5, 2020 and March 31, 2020.

Retirement Plans

3 Months Ended

Jul. 05, 2020

Retirement Benefits [Abstract]

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
			July 5, 2020		June 30, 2019		July 5, 2020		June 30, 2019
Service cost	$	—	$	—	$	235	$	235
Interest cost	132		154		327		376
Expected return on plan assets	(65)		(112)		(447)		(538)
Amortization and deferral	133		52		244		253

Net periodic benefit cost	$	200	$	94	$	359	$	326

Stock-Based Compensation	3 Months Ended
Stock-Based Compensation	Jul. 05, 2020
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation As of July 5, 2020, the Company maintains the 2017 Equity Incentive Plan (“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 $5,053 for the first quarter of fiscal 2021 and $3,874 for the first quarter of fiscal 2020. The Company recognizes compensation expense using the straight-line method over the vesting period of the awards. During the first quarter of fiscal 2021, the Company granted to non-employee directors 3,353 restricted stock units, pursuant to the 2017 EIP. The awards vest immediately upon the date of grant and are settled in shares of common stock. Common stock activity during the first quarter of fiscal 2021 included the vesting of 120,390 restricted stock units, 65,096 TSRs and the exercise of 8,323 stock options. As of July 5, 2020, there were 778,939 non-qualified stock options, 755,489 restricted stock units, 128,375 TSRs and 101,406 PSUs outstanding.

Stockholders' Equity and Noncontrolling Interests

3 Months Ended

Jul. 05, 2020

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 first quarter ended July 5, 2020:


Shares outstanding as of March 31, 2020						42,323,305


Shares issued under equity-based compensation plans, net of equity awards surrendered for option price and taxes						141,889
Shares outstanding as of July 5, 2020						42,465,194

Treasury Stock

During the first quarter ended July 5, 2020, the Company did not purchase any shares but purchased 376,343 shares for $23,029 during the first quarter ended June 30, 2019. At July 5, 2020 and March 31, 2020, the Company held 12,786,685 and 12,791,503 shares as treasury stock, respectively. During the first quarter ended July 5, 2020, the Company also issued 4,818 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.

Accumulated Other Comprehensive Income (“AOCI ”)

The components of AOCI, net of tax, as of July 5, 2020 and March 31, 2020, are as follows:


	March 31, 2020		Before Reclassifications		Amounts Reclassified from AOCI		July 5, 2020
Pension funded status adjustment	$	(22,794)	$	—	$	291	$	(22,503)
Net unrealized (loss) gain on derivative instruments	(5,923)		(773)		3,116		(3,580)
Foreign currency translation adjustment	(186,289)		28,139		—		(158,150)
Accumulated other comprehensive (loss) income	$	(215,006)	$	27,366	$	3,407	$	(184,233)

The following table presents reclassifications from AOCI during the first quarter ended July 5, 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	$	4,082	Cost of goods sold
Tax benefit	(966)
Net unrealized loss on derivative instruments, net of tax	$	3,116

Defined benefit pension costs:
Prior service costs and deferrals	$	377	Net periodic benefit cost, included in other (income) expense, net - See Note 13
Tax benefit	(86)
Net periodic benefit cost, net of tax	$	291

The following table presents reclassifications from AOCI during the first quarter ended June 30, 2019:


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	$	(658)	Cost of goods sold
Tax expense	156
Net unrealized gain on derivative instruments, net of tax	$	(502)

Defined benefit pension costs:
Prior service costs and deferrals	$	305	Net periodic benefit cost, included in other (income) expense, net - See Note 13
Tax benefit	(68)
Net periodic benefit cost, net of tax	$	237

Earnings Per Share

3 Months Ended

Jul. 05, 2020

Earnings Per Share [Abstract]

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
	July 5, 2020		June 30, 2019
Net earnings attributable to EnerSys stockholders	$	35,183	$	48,636
Weighted-average number of common shares outstanding:
Basic	42,385,888		42,656,339
Dilutive effect of:
Common shares from exercise and lapse of equity awards, net of shares assumed reacquired	546,166		462,095
Diluted weighted-average number of common shares outstanding	42,932,054		43,118,434
Basic earnings per common share attributable to EnerSys stockholders	$	0.83	$	1.14
Diluted earnings per common share attributable to EnerSys stockholders	$	0.82	$	1.13
Anti-dilutive equity awards not included in diluted weighted-average common shares	386,263		656,810

Business Segments

3 Months Ended

Jul. 05, 2020

Segment Reporting [Abstract]

Business Segments

During the first quarter of fiscal 2021, the Company's chief operating decision maker, or CODM (the Company's Chief Executive Officer), changed the manner in which he reviews financial information for purposes of assessing business performance and allocating resources, by focusing on the lines of business on a global basis, rather than on geographic basis. As a result of this change, the Company re-evaluated the identification of its operating segments and reportable segments and identified the following as its three new operating segments, based on lines of business:

•Energy Systems - uninterruptible power systems, or “UPS” applications for computer and computer-controlled systems, as well as telecommunications systems, switchgear and electrical control systems used in industrial facilities and electric utilities, large-scale energy storage and energy pipelines. Energy Systems also includes highly integrated power solutions and services to broadband, telecom, renewable and industrial customers, as well as thermally managed cabinets and enclosures for electronic equipment and batteries.

•Motive Power - power for electric industrial forklifts used in manufacturing, warehousing and other material handling applications, as well as mining equipment, diesel locomotive starting and other rail equipment; and

•Specialty - premium starting, lighting and ignition applications in transportation, energy solutions for satellites, military aircraft, submarines, ships and other tactical vehicles, as well as medical and security systems.

The new operating segments also represent the Company's reportable segments under ASC 280, Segment Reporting. All prior comparative periods presented have been recast to conform to these changes.

Summarized financial information related to the Company's reportable segments for the first quarter ended July 5, 2020 and June 30, 2019, is shown below:


	Quarter ended
	July 5, 2020		June 30, 2019
Net sales by segment to unaffiliated customers
Energy Systems	$	353,387	$	353,893
Motive Power	262,834		344,387
Specialty	88,703		81,950
Total net sales	$	704,924	$	780,230
Operating earnings by segment
Energy Systems	$	22,085	$	23,587
Motive Power	27,276		37,098
Specialty	5,246		10,023
Restructuring charges - Energy Systems	(512)		(1,110)
Restructuring charges - Motive Power	(762)		(558)
Restructuring and other exit charges - Specialty	(113)		(704)



Total operating earnings ⁽¹⁾	$	53,220	$	68,336

(1) The Company does not allocate interest expense or other (income) expense to the reportable segments.

(2) The Company does not identify or allocate assets by reportable segment, nor does the CODM evaluate reportable segments using discrete asset information.

(3) Reportable segments do not record inter-segment revenues and accordingly there are none to report.

Goodwill

Concurrent with the change in reporting segments effective April 1, 2020, goodwill was reassigned to the affected reporting units that have been identified within each operating segment, using a relative fair value approach outlined in ASC 350, Intangibles - Goodwill and Other.

The following table presents the amount of goodwill that has been reassigned to each of the Company's reportable segments as of April 1, 2020, using the relative fair value approach, as well as any changes in the carrying amount of goodwill by segment during the first quarter of fiscal 2021:


	Energy Systems		Motive Power		Specialty		Total
Balance at March 31, 2020	$	263,150	$	308,497	$	92,289	$	663,936
Foreign currency translation adjustment	4,971		6,119		1,641		12,731
Balance as of July 5, 2020	$	268,121	$	314,616	$	93,930	$	676,667

Subsequent Events	3 Months Ended
Subsequent Events	Jul. 05, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn August 12, 2020, the Board of Directors approved a quarterly cash dividend of $0.175 per share of common stock to be paid on September 25, 2020, to stockholders of record as of September 11, 2020.

Basis of Presentation (Policies)

3 Months Ended

Jul. 05, 2020

Accounting Policies [Abstract]

Basis of Presentation

Recently Adopted Accounting Pronouncements and Accounting Pronouncements Issued But Not Yet Adopted

Recently Adopted Accounting Pronouncements

The following table sets forth the changes in the Company's allowance for doubtful accounts for the first quarter ended July 5, 2020:


Allowance for doubtful accounts:	Balance at Beginning of Period		Provision for doubtful debts		Write-offs, net of recoveries and other		Balance at End of Period
First quarter ended July 5, 2020	$	15,246	$	96	$	(2,113)	$	13,229

Accounting Pronouncements Issued But Not Adopted as of July 5, 2020

Use of Estimates

Leases (Tables)

3 Months Ended

Jul. 05, 2020

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 July 5, 2020		As of March 31, 2020
Operating Leases:
Right-of-use assets	Other assets	$	71,124	$	70,045
Operating lease current liabilities	Accrued expenses	21,891		21,128
Operating lease non-current liabilities	Other liabilities	51,461		51,215
Finance Leases:
Right-of-use assets	Property, plant, and equipment, net	$	513	$	540
Finance lease current liabilities	Accrued expenses	169		162
Finance lease non-current liabilities	Other liabilities	375		407

Lease, Cost

The components of lease expense for the first quarter ended July 5, 2020 and June 30, 2019 were as follows:


	Classification	Quarter ended July 5, 2020		Quarter ended June 30, 2019
Operating Leases:
Operating lease cost	Operating expenses	$	6,936	$	7,295
Variable lease cost	Operating expenses	2,119		1,706
Short term lease cost	Operating expenses	1,829		2,184
Finance Leases:
Depreciation	Operating expenses	$	42	$	143
Interest expense	Interest expense	7		12
Total		$	10,933	$	11,340

Lessee, Supplemental Information Related To Leases

The following table presents the weighted average lease term and discount rates for leases as of July 5, 2020:


Operating Leases:
Weighted average remaining lease term						6 years
Weighted average discount rate						5.11%
Finance Leases:
Weighted average remaining lease term						3.2 years
Weighted average discount rate						4.92%

Lessee, Operating Lease, Liability, Maturity

The following table presents future payments due under leases reconciled to lease liabilities as of July 5, 2020:


	Finance Leases		Operating Leases
Nine months ended March 31, 2021	$	149	$	19,170
Year ended March 31,
2022	201		21,086
2023	158		14,239
2024	107		8,866
2025	15		5,641
Thereafter	10		16,763
Total undiscounted lease payments	640		85,765
Present value discount	96		12,413
Lease liability	$	544	$	73,352

Finance Lease, Liability, Maturity

The following table presents future payments due under leases reconciled to lease liabilities as of July 5, 2020:


	Finance Leases		Operating Leases
Nine months ended March 31, 2021	$	149	$	19,170
Year ended March 31,
2022	201		21,086
2023	158		14,239
2024	107		8,866
2025	15		5,641
Thereafter	10		16,763
Total undiscounted lease payments	640		85,765
Present value discount	96		12,413
Lease liability	$	544	$	73,352

Lessee, Supplemental Cash Flow Information Related To Leases

The following table presents supplemental disclosures of cash flow information related to leases for the first quarter ended July 5, 2020 and June 30, 2019:


	Quarter ended July 5, 2020		Quarter ended June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$	7	$	12
Operating cash flows from operating leases	6,921		7,213
Financing cash flows from finance leases	41		142
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	$	—	$	—
Right-of-use assets obtained in exchange for new operating lease liabilities	6,177		2,628

Acquisition (Tables)

3 Months Ended

Jul. 05, 2020

Business Combinations [Abstract]

Schedule of Intangible Assets

Information regarding the Company’s other intangible assets are as follows:


	Balance as of
	July 5, 2020										March 31, 2020
	Gross Amount		Accumulated Amortization		Net Amount		Gross Amount		Accumulated Amortization		Net Amount
Indefinite-lived intangible assets:
Trademarks	$	147,749	$	(957)	$	146,792	$	147,356	$	(953)	$	146,403
Finite-lived intangible assets:
Customer relationships	294,732		(70,685)		224,047		292,155		(64,855)		227,300
Non-compete	3,038		(2,824)		214		3,021		(2,817)		204
Technology	96,536		(22,746)		73,790		96,047		(20,349)		75,698
Trademarks	8,008		(2,245)		5,763		8,008		(1,928)		6,080
Licenses	1,196		(1,196)		—		1,196		(1,196)		—
Total	$	551,259	$	(100,653)	$	450,606	$	547,783	$	(92,098)	$	455,685

Inventories (Tables)

3 Months Ended

Jul. 05, 2020

Inventory Disclosure [Abstract]

Summary Of Inventories

Inventories, net consist of:


	July 5, 2020		March 31, 2020
Raw materials	$	144,185	$	141,906
Work-in-process	88,091		91,520
Finished goods	278,322		286,034
Total	$	510,598	$	519,460

Fair Value of Financial Instruments (Tables)

3 Months Ended

Jul. 05, 2020

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 July 5, 2020 and March 31, 2020, and the basis for that measurement:


	Total Fair Value Measurement July 5, 2020		Quoted Price in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Lead forward contracts	$	3	$	—	$	3	$	—
Foreign currency forward contracts	93		—		93		—
Total derivatives	$	96	$	—	$	96	$	—


	Total Fair Value Measurement March 31, 2020		Quoted Price in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Lead forward contracts	$	(2,433)	$	—	$	(2,433)	$	—
Foreign currency forward contracts	1		—		1		—
Total derivatives	$	(2,432)	$	—	$	(2,432)	$	—

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 July 5, 2020 and March 31, 2020 were as follows:


	July 5, 2020						March 31, 2020
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Financial assets:
Derivatives ⁽¹⁾	$	96	$	96	$	—	$	—
Financial liabilities:
Senior Notes ⁽²⁾	$	600,000	$	606,000	$	600,000	$	573,000
Derivatives ⁽¹⁾	—		—		2,432		2,432

(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 July 5, 2020 and March 31, 2020).

(2)The fair value amount of the Senior Notes at July 5, 2020 and March 31, 2020 represent the trading value of the instruments.

Derivative Financial Instruments (Tables)

3 Months Ended

Jul. 05, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Fair Value of Derivative Instruments

July 5, 2020 and March 31, 2020


	Derivatives and Hedging Activities Designated as Cash Flow Hedges						Derivatives and Hedging Activities Not Designated as Hedging Instruments
	July 5, 2020		March 31, 2020		July 5, 2020		March 31, 2020
Prepaid and other current assets:
Lead forward contracts	$	3	$	—	$	—	$	—
Foreign currency forward contracts	72		—		21		375
Total assets	$	75	$	—	$	21	$	375
Accrued expenses:
Lead forward contracts	$	—	$	2,433	$	—	$	—
Foreign currency forward contracts	—		374		—		—
Total liabilities	$	—	$	2,807	$	—	$	—

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 July 5, 2020


Derivatives Designated as Cash Flow Hedges	Pretax Gain (Loss) Recognized in AOCI on Derivatives (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	$	(1,274)	Cost of goods sold	$	(3,799)
Foreign currency forward contracts	261		Cost of goods sold	(283)
Total	$	(1,013)		$	(4,082)


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	$	262
Total		$	262

The Effect of Derivative Instruments on the Consolidated Condensed Statements of Income

For the quarter ended June 30, 2019


Derivatives Designated as Cash Flow Hedges	Pretax Gain (Loss) Recognized in AOCI on Derivatives (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	$	(2,494)	Cost of goods sold	$	441
Foreign currency forward contracts	103		Cost of goods sold	217
Total	$	(2,391)		$	658


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	$	34
Total		$	34

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(n)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579240-113959

+ Details

Warranty (Tables)

3 Months Ended

Jul. 05, 2020

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
	July 5, 2020		June 30, 2019
Balance at beginning of period	$	63,525	$	54,568
Current period provisions	6,974		7,519
Costs incurred	(11,310)		(5,948)

Foreign currency translation adjustment	582		40
Balance at end of period	$	59,771	$	56,179

Restructuring Plans (Tables)

3 Months Ended

Jul. 05, 2020

Restructuring and Related Activities [Abstract]

Reconciliation of Restructuring Reserve

The charges for the first quarter of fiscal 2021 relate to severance payments and are presented by reportable segments as follows:


	Energy Systems		Motive Power		Specialty		Total
Restructuring charges	$	507	$	762	$	134	$	1,403

A roll-forward of the restructuring reserve is as follows:


Balance as of March 31, 2020	$	3,325
Accrued	1,403
Costs incurred	(1,291)
Foreign currency impact	140
Balance as of July 5, 2020	$	3,577

Debt (Tables)

3 Months Ended

Jul. 05, 2020

Debt Disclosure [Abstract]

Long-Term Debt And Capital Lease Obligations

The following summarizes the Company’s long-term debt as of July 5, 2020 and March 31, 2020:


	July 5, 2020						March 31, 2020
	Principal		Unamortized Issuance Costs		Principal		Unamortized Issuance Costs
Senior Notes	$	600,000	$	6,006	$	600,000	$	6,306
Amended Credit Facility, due 2022	488,487		1,969		513,224		2,187

	$	1,088,487	$	7,975	$	1,113,224	$	8,493
Less: Unamortized issuance costs	7,975				8,493
Long-term debt, net of unamortized issuance costs	$	1,080,512			$	1,104,731

Retirement Plans (Tables)

3 Months Ended

Jul. 05, 2020

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
			July 5, 2020		June 30, 2019		July 5, 2020		June 30, 2019
Service cost	$	—	$	—	$	235	$	235
Interest cost	132		154		327		376
Expected return on plan assets	(65)		(112)		(447)		(538)
Amortization and deferral	133		52		244		253

Net periodic benefit cost	$	200	$	94	$	359	$	326

Stockholders' Equity and Noncontrolling Interests (Tables)

3 Months Ended

Jul. 05, 2020

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 first quarter ended July 5, 2020:


Shares outstanding as of March 31, 2020						42,323,305


Shares issued under equity-based compensation plans, net of equity awards surrendered for option price and taxes						141,889
Shares outstanding as of July 5, 2020						42,465,194

Components Of Accumulated Other Comprehensive Income

The components of AOCI, net of tax, as of July 5, 2020 and March 31, 2020, are as follows:


	March 31, 2020		Before Reclassifications		Amounts Reclassified from AOCI		July 5, 2020
Pension funded status adjustment	$	(22,794)	$	—	$	291	$	(22,503)
Net unrealized (loss) gain on derivative instruments	(5,923)		(773)		3,116		(3,580)
Foreign currency translation adjustment	(186,289)		28,139		—		(158,150)
Accumulated other comprehensive (loss) income	$	(215,006)	$	27,366	$	3,407	$	(184,233)

Reclassification from Accumulated Other Comprehensive Income

The following table presents reclassifications from AOCI during the first quarter ended July 5, 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	$	4,082	Cost of goods sold
Tax benefit	(966)
Net unrealized loss on derivative instruments, net of tax	$	3,116

Defined benefit pension costs:
Prior service costs and deferrals	$	377	Net periodic benefit cost, included in other (income) expense, net - See Note 13
Tax benefit	(86)
Net periodic benefit cost, net of tax	$	291

The following table presents reclassifications from AOCI during the first quarter ended June 30, 2019:


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	$	(658)	Cost of goods sold
Tax expense	156
Net unrealized gain on derivative instruments, net of tax	$	(502)

Defined benefit pension costs:
Prior service costs and deferrals	$	305	Net periodic benefit cost, included in other (income) expense, net - See Note 13
Tax benefit	(68)
Net periodic benefit cost, net of tax	$	237

Earnings Per Share (Tables)

3 Months Ended

Jul. 05, 2020

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares


	Quarter ended
	July 5, 2020		June 30, 2019
Net earnings attributable to EnerSys stockholders	$	35,183	$	48,636
Weighted-average number of common shares outstanding:
Basic	42,385,888		42,656,339
Dilutive effect of:
Common shares from exercise and lapse of equity awards, net of shares assumed reacquired	546,166		462,095
Diluted weighted-average number of common shares outstanding	42,932,054		43,118,434
Basic earnings per common share attributable to EnerSys stockholders	$	0.83	$	1.14
Diluted earnings per common share attributable to EnerSys stockholders	$	0.82	$	1.13
Anti-dilutive equity awards not included in diluted weighted-average common shares	386,263		656,810

Business Segments Business Segments (Tables)

3 Months Ended

Jul. 05, 2020

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 first quarter ended July 5, 2020 and June 30, 2019, is shown below:


	Quarter ended
	July 5, 2020		June 30, 2019
Net sales by segment to unaffiliated customers
Energy Systems	$	353,387	$	353,893
Motive Power	262,834		344,387
Specialty	88,703		81,950
Total net sales	$	704,924	$	780,230
Operating earnings by segment
Energy Systems	$	22,085	$	23,587
Motive Power	27,276		37,098
Specialty	5,246		10,023
Restructuring charges - Energy Systems	(512)		(1,110)
Restructuring charges - Motive Power	(762)		(558)
Restructuring and other exit charges - Specialty	(113)		(704)



Total operating earnings ⁽¹⁾	$	53,220	$	68,336

(1) The Company does not allocate interest expense or other (income) expense to the reportable segments.

(2) The Company does not identify or allocate assets by reportable segment, nor does the CODM evaluate reportable segments using discrete asset information.


	Energy Systems		Motive Power		Specialty		Total
Balance at March 31, 2020	$	263,150	$	308,497	$	92,289	$	663,936
Foreign currency translation adjustment	4,971		6,119		1,641		12,731
Balance as of July 5, 2020	$	268,121	$	314,616	$	93,930	$	676,667

Basis of Presentation - Allowance for Doubtful Accounts (Details) $ in Thousands	3 Months Ended
	Jul. 05, 2020 USD ($)
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	$ 15,246
Provision for doubtful debts	96
Write-offs, net of recoveries and other	(2,113)
Balance at End of Period	$ 13,229

Revenue Recognition - (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 704,924	$ 780,230
Remaining performance obligation	92,632
Contract with customer, liability, current portion	14,941		$ 17,342
Contract with customer, liability, noncurrent portion	8,314		8,356
Deferred Revenue, Revenue Recognized	3,466	4,467
Unbilled contracts receivable	44,792		$ 39,048
Right to recover product	4,265
Refund liability	6,970
Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales	36,102	41,495
Service
Disaggregation of Revenue [Line Items]
Net sales	$ 68,758	$ 79,147

Revenue Recognition - (Remaining Performance Obligation) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Jul. 05, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation		$ 92,632
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation		$ 66,604
Remaining performance obligation, timing of satisfaction		9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation		$ 24,149
Remaining performance obligation, timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation		1,808
Remaining performance obligation, timing of satisfaction	1 year
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		18
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		$ 53
Remaining performance obligation, timing of satisfaction	1 year

Leases - (Additional Information) (Details)	Jul. 05, 2020
Minimum
Lessee, Lease, Description [Line Items]
Contract term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Contract term	17 years

Leases - (Balance Sheet Classification) (Details) - USD ($) $ in Thousands	Jul. 05, 2020	Mar. 31, 2020
Leases [Abstract]
Operating lease right-of-use asset	$ 71,124	$ 70,045
Operating lease current liabilities	21,891	21,128
Operating lease non-current liabilities	51,461	51,215
Finance lease right-of-use asset	513	540
Finance lease current liabilities	169	162
Finance lease non-current liabilities	$ 375	$ 407

Leases - (Lease Cost) (Details) - USD ($) $ in Thousands	3 Months Ended
Leases - (Lease Cost) (Details) - USD ($) $ in Thousands	Jul. 05, 2020	Jun. 30, 2019
Operating Leases:
Operating lease cost	$ 6,936	$ 7,295
Variable lease cost	2,119	1,706
Short term lease cost	1,829	2,184
Finance Leases:
Depreciation	42	143
Interest expense	7	12
Total	$ 10,933	$ 11,340

Leases - (Additional Information Related to Leases) (Details)	Jul. 05, 2020
Operating Leases:
Weighted average remaining lease term	6 years
Weighted average discount rate	5.11%
Finance Leases:
Weighted average remaining lease term	3 years 2 months 12 days
Weighted average discount rate	4.92%

Leases - (Finance and Operating Lease Maturity Schedules) (Details) $ in Thousands	Jul. 05, 2020 USD ($)
Finance Leases
Nine months ended March 31, 2021	$ 149
Year ended March 31, 2021	201
Year ended March 31, 2022	158
Year ended March 31, 2023	107
Year ended March 31, 2024	15
Thereafter	10
Total undiscounted lease payments	640
Present value discount	96
Lease liability	544
Operating Leases
Nine months ended March 31, 2021	19,170
Year ended March 31, 2021	21,086
Year ended March 31, 2022	14,239
Year ended March 31, 2023	8,866
Year ended March 31, 2024	5,641
Thereafter	16,763
Total undiscounted lease payments	85,765
Present value discount	12,413
Lease liability	$ 73,352

Leases - (Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$ 7	$ 12
Operating cash flows from operating leases	6,921	7,213
Financing cash flows from finance leases	41	142
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	0
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 6,177	$ 2,628

Acquisitions - (Additional Information) (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jul. 05, 2020	Jun. 30, 2019	Mar. 31, 2020
Business Acquisition [Line Items]
Goodwill	$ 676,667		$ 663,936
Estimated tax-deductible goodwill			72,056
Amortization of intangible assets	8,555	$ 7,316
Amortization of intangible assets, remainder of 2020	24,104
Amortization of intangible assets, 2021	32,420
Amortization of intangible assets, 2022	31,122
Amortization of intangible assets, 2023	27,725
Amortization of intangible assets, 2024	$ 26,494
N Holding AB
Business Acquisition [Line Items]
Payments to acquire businesses		77,777
Debt assumed			107,018
Goodwill			$ 73,788
N Holding AB \| Developed Technology Rights
Business Acquisition [Line Items]
Acquired intangible assets		$ 19,000
Useful life of intangible assets		10 years
N Holding AB \| Trademarks
Business Acquisition [Line Items]
Acquired intangible assets		$ 6,000
Useful life of intangible assets		5 years
N Holding AB \| Customer relationships
Business Acquisition [Line Items]
Acquired intangible assets		$ 9,000
Minimum \| N Holding AB \| Customer relationships
Business Acquisition [Line Items]
Useful life of intangible assets			15 years
Maximum \| N Holding AB \| Customer relationships
Business Acquisition [Line Items]
Useful life of intangible assets			18 years

Acquisitions - (Other Intangible Assets) (Details) - USD ($) $ in Thousands	Jul. 05, 2020	Mar. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets, gross amount	$ 551,259	$ 547,783
Total intangible assets, accumulated amortization	(100,653)	(92,098)
Total intangible assets, net amount	450,606	455,685
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross amount	294,732	292,155
Finite-lived intangible assets, accumulated amortization	(70,685)	(64,855)
Finite-lived intangible assets, net amount	224,047	227,300
Non-compete
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross amount	3,038	3,021
Finite-lived intangible assets, accumulated amortization	(2,824)	(2,817)
Finite-lived intangible assets, net amount	214	204
Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross amount	96,536	96,047
Finite-lived intangible assets, accumulated amortization	(22,746)	(20,349)
Finite-lived intangible assets, net amount	73,790	75,698
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, gross amount	147,749	147,356
Indefinite-lived intangible assets, accumulated amortization	(957)	(953)
Indefinite-lived intangible assets, net amount	146,792	146,403
Finite-lived intangible assets, gross amount	8,008	8,008
Finite-lived intangible assets, accumulated amortization	(2,245)	(1,928)
Finite-lived intangible assets, net amount	5,763	6,080
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

Inventories - (Details) - USD ($) $ in Thousands	Jul. 05, 2020	Mar. 31, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 144,185	$ 141,906
Work-in-process	88,091	91,520
Finished goods	278,322	286,034
Total	$ 510,598	$ 519,460

Fair Value of Financial Instruments - (Financial Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jul. 05, 2020	Mar. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	$ 96	$ (2,432)
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	96	(2,432)
Lead forward contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	3	(2,433)
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	3	(2,433)
Foreign currency forward contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative fair value	93	1
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	$ 93	$ 1

Fair Value of Financial Instruments - (Additional Information) (Details) - USD ($) $ in Thousands	Jul. 05, 2020	Mar. 31, 2020	Dec. 11, 2019	Apr. 23, 2015
4.375% Senior Notes due 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	4.375%		4.375%
Long-term debt	$ 300,000		$ 300,000
Face value of trades, percentage	99.00%	94.00%
5.00% Senior Notes due 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate	5.00%			5.00%
Long-term debt	$ 300,000			$ 300,000
Face value of trades, percentage	103.00%	97.00%

Fair Value of Financial Instruments - (Carrying Amounts and Estimated Fair Values) (Details) - USD ($) $ in Thousands	Jul. 05, 2020	Mar. 31, 2020
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative asset	$ 96	$ 0
Notes	600,000	600,000
Derivative liability	0	2,432
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative asset	96	0
Notes	606,000	573,000
Derivative liability	$ 0	$ 2,432

Derivative Financial Instruments - (Additional Information) (Details) $ in Thousands, lb in Millions	Jul. 05, 2020 USD ($) lb	Mar. 31, 2020 USD ($) lb
Cost of Sales
Derivatives, Fair Value [Line Items]
Foreign currency cash flow hedge loss to be reclassified during next 12 months	$ 4,569
Lead forward contracts
Derivatives, Fair Value [Line Items]
Notional amount in pounds \| lb	24.0	35.0
Fair value of hedges, net	$ 19,299	$ 30,078
Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Derivative notional amount	9,062	34,008
Foreign currency forward contracts \| Derivatives and Hedging Activities Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Derivative notional amount	$ 19,618	$ 42,232

Derivative Financial Instruments - (Location and Amounts of Derivative Fair Values) (Details) - USD ($) $ in Thousands	Jul. 05, 2020	Mar. 31, 2020
Derivatives and Hedging Activities Designated as Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	$ 75	$ 0
Derivatives liabilities, fair value	0	2,807
Derivatives and Hedging Activities Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Derivative assets, fair value	21	375
Derivatives liabilities, fair value	0	0
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	374
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	72	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	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	21	375
Lead forward contracts \| Derivatives and Hedging Activities Designated as Cash Flow Hedges \| Accrued expenses
Derivatives, Fair Value [Line Items]
Derivatives liabilities, fair value	0	2,433
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	3	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
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

Derivative Financial Instruments - (Derivatives Designated as Cash Flow Hedges) (Details) - Derivatives Designated as Cash Flow Hedges - USD ($) $ in Thousands	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	$ (1,013)	$ (2,391)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	(4,082)	658
Lead forward contracts \| Cost of Sales
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(1,274)	(2,494)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	(3,799)	441
Foreign currency forward contracts \| Cost of Sales
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	261	103
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	$ (283)	$ 217

Derivative Financial Instruments - (Derivatives Not Designated as Hedging Instruments) (Details) - Derivatives Not Designated as Hedging Instruments $ in Thousands	3 Months Ended
	Jul. 05, 2020 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives Not Designated as Hedging Instruments	$ 262
Other Income Expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives Not Designated as Hedging Instruments	$ 262

Income Taxes - (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Goodwill and Intangible Assets			$ 22,500
Additional tax benefit recognized	$ 1,883
Effective income tax rates	15.40%	17.00%
Foreign income as a percentage of worldwide income	69.00%	64.00%
Foreign effective income tax rates	9.00%	11.50%
Tax rate of Swiss subsidiary	6.00%	6.00%

Warranty - (Analysis of Changes in the Liability) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019
Product Warranties Disclosures [Abstract]
Balance at beginning of period	$ 63,525	$ 54,568
Current period provisions	6,974	7,519
Costs incurred	(11,310)	(5,948)
Foreign currency translation adjustment	582	40
Balance at end of period	$ 59,771	$ 56,179

Commitments, Contingencies and Litigation - (Additional Information) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Feb. 29, 2016	Jul. 05, 2020	Jun. 30, 2019	Mar. 31, 2020
Commitments, Contingencies And Litigation [Line Items]
Provision for environmental liabilities		$ 1,060		$ 1,060
Belgium Anti-Competition Proceeding
Commitments, Contingencies And Litigation [Line Items]
Penalties paid relating to anti-competition investigations	$ 1,962		$ 2,402

Restructuring Plans - (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	15 Months Ended
	Jul. 05, 2020	Jun. 30, 2019	Sep. 30, 2019	Jul. 05, 2020	Jun. 30, 2020	Mar. 31, 2020
Restructuring Cost and Reserve [Line Items]
Expected remaining cost	$ 6,500			$ 6,500
Restructuring charges	1,387	$ 2,372
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,403
Restructuring costs incurred	1,291
Energy Systems
Restructuring Cost and Reserve [Line Items]
Restructuring charges	512	1,110
Energy Systems \| Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	507
Motive Power
Restructuring Cost and Reserve [Line Items]
Restructuring charges	762	558
Motive Power \| Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	762
Specialty
Restructuring Cost and Reserve [Line Items]
Restructuring charges	113	704
Specialty \| Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	134
Closure Of Facility In Targovishte Bulgaria
Restructuring Cost and Reserve [Line Items]
Expected remaining cost						$ 30,000
Restructuring charges			$ 20,242
Richmond Kentucky Battery Formation Area Fire
Restructuring Cost and Reserve [Line Items]
Restructuring charges	9,274	17,037			$ 26,311
Expected additional restructuring charges	50,000			50,000
Prepaid Insurance	10,000			10,000		$ 12,000
Restructuring costs incurred	$ 3,700	$ 5,000		$ 8,700	$ 22,000

Restructuring Plans - (Roll-forward of Restructuring Reserve) (Details) - Employee Severance $ in Thousands	3 Months Ended
	Jul. 05, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	$ 3,325
Accrued	1,403
Costs incurred	(1,291)
Foreign currency impact	140
Restructuring reserve, ending balance	$ 3,577

Debt - (Long-term Debt Including Capital Lease Obligations) (Details) - USD ($) $ in Thousands	Jul. 05, 2020	Mar. 31, 2020
Debt Instrument [Line Items]
Debt and capital lease obligations	$ 1,088,487	$ 1,113,224
Unamortized Issuance Costs	7,975	8,493
Long-term debt, net of unamortized issuance costs	1,080,512	1,104,731
Senior Notes
Debt Instrument [Line Items]
Long-term debt	600,000	600,000
Unamortized Issuance Costs	6,006	6,306
Secured Debt \| Incremental Commitment Agreement \| Amended Credit Facility, due 2022
Debt Instrument [Line Items]
Incremental term loan commitment	488,487	513,224
Unamortized Issuance Costs	$ 1,969	$ 2,187

Debt - (Additional Information) (Details)			3 Months Ended
Debt - (Additional Information) (Details)	Dec. 11, 2019 USD ($)	Aug. 04, 2017 USD ($)	Jul. 05, 2020 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2020 USD ($)	Dec. 28, 2019	Mar. 31, 2019 USD ($)	Mar. 31, 2019 CAD ($)	Apr. 23, 2015 USD ($)
Debt Instrument [Line Items]
Increase in borrowing capacity limit		$ 325,000,000
Company owned capital stock, percentage securing senior secured credit facility		65.00%
Short-term debt			$ 46,762,000		$ 46,544,000
Short-term debt, weighted average interest rate			2.00%		3.00%
Amortization expense relating to debt issuance costs and included in interest expense			$ 518,000	$ 378,000
Deferred issuance costs, net of accumulated amortization			7,975,000		$ 8,493,000
4.375% Senior Notes due 2027
Debt Instrument [Line Items]
Long-term debt	$ 300,000,000		$ 300,000,000
Interest rate	4.375%		4.375%
Proceeds from issuance of debt, net of debt issuance costs	$ 296,250,000
5.00% Senior Notes due 2023
Debt Instrument [Line Items]
Long-term debt			$ 300,000,000						$ 300,000,000
Interest rate			5.00%						5.00%
Standby Letters of Credit
Debt Instrument [Line Items]
Available lines of credit			$ 701,255,000		693,640,000
Stand by letters of credit			7,720,000		7,720,000
Outstanding amount			93,561,000		$ 105,946,000
Maximum
Debt Instrument [Line Items]
Consideration transferred			250,000
Amended Credit Facility, due 2022 \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 600,000,000					$ 100,000,000
Available lines of credit			88,000,000
Amended Credit Facility, due 2022 \| Secured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity							299,105,000
Debt instrument, face amount		$ 150,000,000
Available lines of credit			400,487,000
Current portion of long-term debt			$ 42,009,000
Amended 2017 Term Loan \| Term Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity							99,105,000
Amended 2017 Term Loan \| Secured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity							449,105,000	$ 133,050,000
Amended 2017 Revolver \| Secured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity							$ 700,000,000
LIBOR \| 2017 Revolver And 2017 Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate		1.50%
LIBOR \| 2017 Revolver And 2017 Term Loan \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		1.25%
LIBOR \| 2017 Revolver And 2017 Term Loan \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		2.00%
Federal Funds Effective Rate \| 2017 Revolver And 2017 Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate		0.50%
Eurocurrency Base Rate \| 2017 Revolver And 2017 Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
CDOR \| 2017 Revolver And 2017 Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate		0.50%
Debt Instrument Quarterly Installments Beginning December 31, 2018 Through December 30, 2019
Debt Instrument [Line Items]
Debt instrument, periodic payment		$ 5,645,000
Debt Instrument Quarterly Installments Beginning December 31, 2019 Through December 30, 2020
Debt Instrument [Line Items]
Debt instrument, periodic payment		8,468,000
Debt Instrument Quarterly Installments Beginning December 31, 2020 Through September 29, 2022
Debt Instrument [Line Items]
Debt instrument, periodic payment		11,290,000
Debt Instrument Final Installments Payable On September 30, 2022
Debt Instrument [Line Items]
Debt instrument, periodic payment		$ 320,000,000
Maximum Leverage Ratio
Debt Instrument [Line Items]
Measurement input			3.50			4.00
Maximum Leverage Ratio \| Minimum
Debt Instrument [Line Items]
Measurement input			3.50
Maximum Leverage Ratio \| Maximum
Debt Instrument [Line Items]
Measurement input			4.00
Prior to September 15, 2027 \| 4.375% Senior Notes due 2027
Debt Instrument [Line Items]
Redemption percentage			100.00%
On or after September 15, 2027 \| 4.375% Senior Notes due 2027
Debt Instrument [Line Items]
Redemption percentage			100.00%
Change of control triggering event \| 4.375% Senior Notes due 2027
Debt Instrument [Line Items]
Redemption percentage			101.00%

Retirement Plans - (Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019
United States Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0
Interest cost	132	154
Expected return on plan assets	(65)	(112)
Amortization and deferral	133	52
Net periodic benefit cost	200	94
International Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	235	235
Interest cost	327	376
Expected return on plan assets	(447)	(538)
Amortization and deferral	244	253
Net periodic benefit cost	$ 359	$ 326

Stock-Based Compensation - (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grants	4,173,554
Equity-based compensation expense	$ 5,053	$ 3,874
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested restricted stock units (in shares)	120,390
Awards outstanding (in shares)	755,489
TSRs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding (in shares)	128,375
Employee Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercised (in shares)	8,323
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding (in shares)	101,406
Non-employee Directors \| RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock unit grants during period (in shares)	3,353
Non-employee Directors \| TSRs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock unit grants during period (in shares)	65,096
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)	778,939

Stockholders' Equity and Noncontrolling Interests - (Change in the Number of Shares of Common Stock Outstanding) (Details) - shares	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019
Common Stock Outstanding Roll Forward
Shares outstanding, beginning balance (in shares)	42,323,305
Purchase of treasury stock (in shares)	0	376,343
Shares issued towards equity-based compensation plans, net of equity awards surrendered for option price and taxes (in shares)	141,889
Shares outstanding, ending balance (in shares)	42,465,194

Stockholders' Equity and Noncontrolling Interests - (Treasury Stock) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019	Mar. 31, 2020
Equity [Abstract]
Purchase of treasury stock (in shares)	0	376,343
Treasury stock purchased during period, value	$ 0	$ 23,029
Treasury stock (in shares)	12,786,685		12,791,503
Treasury shares issued (in shares)	4,818
Treasury shares issued (in dollars per share)	$ 62.55

Stockholders' Equity and Noncontrolling Interests - (Components of Accumulated Other Comprehensive Income) (Details) $ in Thousands	3 Months Ended
	Jul. 05, 2020 USD ($)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	$ 1,304,062
Ending balance	1,365,173
Pension funded status adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	22,794
Before Reclassifications	0
Amounts Reclassified from AOCI	(291)
Ending balance	22,503
Net unrealized (loss) gain on derivative instruments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	(5,923)
Before Reclassifications	773
Amounts Reclassified from AOCI	3,116
Ending balance	(3,580)
Foreign currency translation adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	(186,289)
Before Reclassifications	(28,139)
Amounts Reclassified from AOCI	0
Ending balance	(158,150)
Accumulated other comprehensive (loss) income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	(215,006)
Before Reclassifications	27,366
Amounts Reclassified from AOCI	3,407
Ending balance	$ (184,233)

Stockholders' Equity and Noncontrolling Interests - (Reclassifications from AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net unrealized loss on derivative instruments	$ (529,947)	$ (578,718)
Derivatives in cash flow hedging relationships
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax expense (benefit)	(966)	156
Net of tax	3,116	(502)
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 loss on derivative instruments	4,082	(658)
Defined benefit pension costs
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior service costs and deferrals	377	305
Tax expense (benefit)	(86)	(68)
Net of tax	$ 291	$ 237

- (Other Disclosures) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jul. 05, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 30, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 1,304,062		$ 1,286,017
Stock-based compensation	5,053		3,874
Exercise of stock options	481		38
Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net	(3,135)		(6,081)
Purchase of common stock			(23,029)
Other	176		(80)
Net earnings	35,183		48,636
Dividends	(7,428)		(7,499)
Other comprehensive income:
Pension funded status adjustment, net of tax	291		237
Net unrealized gain (loss) on derivative instruments (net of tax)	2,343		(2,329)
Foreign currency translation adjustment (excludes losses related to redeemable noncontrolling interests)	28,147		(3,211)
Ending balance	$ 1,365,173		$ 1,296,573
Dividends per common share (in dollars per share)	$ 0.175	$ 0.175	$ 0.175	$ 0.175
Pension funded status adjustment, tax benefit (expense)		$ 86		$ 141
Net unrealized gain (loss) on derivative instruments, tax (benefit) expense		$ 726		$ 720
Preferred Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 0		$ 0
Other comprehensive income:
Ending balance	0		0
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	551		548
Exercise of stock options	2		3
Other comprehensive income:
Ending balance	553		551
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	529,100		512,696
Stock-based compensation	5,053		3,874
Exercise of stock options	479		35
Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net	(3,135)		(6,081)
Other	(123)		(80)
Dividends	172		133
Other comprehensive income:
Ending balance	531,546		510,577
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(564,376)		(530,760)
Purchase of common stock			(23,029)
Other	299
Other comprehensive income:
Ending balance	(564,077)		(553,789)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,556,980		1,450,325
Net earnings	35,183		48,636
Dividends	(7,600)		(7,632)
Other comprehensive income:
Ending balance	1,584,563		1,491,329
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(215,006)		(142,682)
Other comprehensive income:
Pension funded status adjustment, net of tax	291		237
Net unrealized gain (loss) on derivative instruments (net of tax)	2,343		(2,329)
Foreign currency translation adjustment (excludes losses related to redeemable noncontrolling interests)	28,139		(3,128)
Ending balance	(184,233)		(147,902)
Contra-Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(6,724)		(7,840)
Other comprehensive income:
Ending balance	(6,724)		(7,840)
Total EnerSys Stockholders’ Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,300,525		1,282,287
Stock-based compensation	5,053		3,874
Exercise of stock options	481		38
Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net	(3,135)		(6,081)
Purchase of common stock			(23,029)
Other	176		(80)
Net earnings	35,183		48,636
Dividends	(7,428)		(7,499)
Other comprehensive income:
Pension funded status adjustment, net of tax	291		237
Net unrealized gain (loss) on derivative instruments (net of tax)	2,343		(2,329)
Foreign currency translation adjustment (excludes losses related to redeemable noncontrolling interests)	28,139		(3,128)
Ending balance	1,361,628		1,292,926
Non- redeemable Non- Controlling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	3,537		3,730
Net earnings			0
Other comprehensive income:
Foreign currency translation adjustment (excludes losses related to redeemable noncontrolling interests)	8		(83)
Ending balance	$ 3,545		$ 3,647

Earnings Per Share - (Reconciliation from Basic to Diluted Average Common Shares) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jul. 05, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net earnings attributable to EnerSys stockholders		$ 48,636
Basic weighted-average number of common shares outstanding (in shares)	42,385,888	42,656,339
Common shares from exercise and lapse of equity awards, net of shares assumed reacquired (in shares)	546,166	462,095
Diluted weighted-average number of common shares outstanding (in shares)	42,932,054	43,118,434
Basic earnings per common share attributable to EnerSys stockholders (in dollars per share)	$ 0.83	$ 1.14
Diluted earnings per common share attributable to EnerSys stockholders (in dollars per share)	$ 0.82	$ 1.13
Anti-dilutive equity awards not included in diluted weighted-average common shares (in shares)	386,263	656,810
Redeemable Noncontrolling Interest [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net earnings attributable to EnerSys stockholders	$ 35,183

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Business Segments - (Details) $ in Thousands	3 Months Ended
Business Segments - (Details) $ in Thousands	Jul. 05, 2020 USD ($) segment	Jun. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| segment	3
Net sales	$ 704,924	$ 780,230
Operating earnings by segment	53,220	68,336
Restructuring charges	1,387	2,372
Energy Systems
Segment Reporting Information [Line Items]
Net sales	353,387	353,893
Operating earnings by segment	22,085	23,587
Restructuring charges	512	1,110
Motive Power
Segment Reporting Information [Line Items]
Net sales	262,834	344,387
Operating earnings by segment	27,276	37,098
Restructuring charges	762	558
Specialty
Segment Reporting Information [Line Items]
Net sales	88,703	81,950
Operating earnings by segment	5,246	10,023
Restructuring charges	$ 113	$ 704

Business Segments - (Goodwill) (Details) $ in Thousands	3 Months Ended
Business Segments - (Goodwill) (Details) $ in Thousands	Jul. 05, 2020 USD ($)
Segment Reporting Information [Line Items]
Balance at March 31, 2020	$ 663,936
Foreign currency translation adjustment	12,731
Balance as of July 5, 2020	676,667
Energy Systems
Segment Reporting Information [Line Items]
Balance at March 31, 2020	263,150
Foreign currency translation adjustment	4,971
Balance as of July 5, 2020	268,121
Motive Power
Segment Reporting Information [Line Items]
Balance at March 31, 2020	308,497
Foreign currency translation adjustment	6,119
Balance as of July 5, 2020	314,616
Specialty
Segment Reporting Information [Line Items]
Balance at March 31, 2020	92,289
Foreign currency translation adjustment	1,641
Balance as of July 5, 2020	$ 93,930

Subsequent Events - (Details)	3 Months Ended
Subsequent Events - (Details)	Jul. 05, 2020 $ / shares
Subsequent Event
Subsequent Event [Line Items]
Common stock dividends (in dollars per share)	$ 0.175