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Stockholders' Equity and Noncontrolling Interests - (Other Disclosures) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jul. 04, 2021	Jul. 05, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 1,543,576	$ 1,304,062
Stock-based compensation	3,659	5,053
Exercise of stock options	387	481
Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net	(4,803)	(3,135)
Purchase of common stock	(31,512)
Other	214	176
Net earnings	43,929	35,183
Dividends	(7,435)	(7,428)
Dissolution of joint venture	(47)
Other comprehensive income:
Pension funded status adjustment, net of tax	240	291
Net unrealized gain (loss) on derivative instruments (net of tax)	3,897	2,343
Foreign currency translation adjustment (excludes losses related to redeemable noncontrolling interests)	15,321	28,147
Ending balance	$ 1,567,426	$ 1,365,173
Dividends per common share (in dollars per share)	$ 0.175	$ 0.175
Pension funded status adjustment, tax benefit (expense)	$ 68	$ 86
Net unrealized gain (loss) on derivative instruments, tax (benefit) expense	1,187	726
Total EnerSys Stockholders’ Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,539,755	1,300,525
Stock-based compensation	3,659	5,053
Exercise of stock options	387	481
Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net	(4,803)	(3,135)
Purchase of common stock	(31,512)
Other	214	176
Net earnings	43,929	35,183
Dividends	(7,435)	(7,428)
Other comprehensive income:
Pension funded status adjustment, net of tax	240	291
Net unrealized gain (loss) on derivative instruments (net of tax)	3,897	2,343
Foreign currency translation adjustment (excludes losses related to redeemable noncontrolling interests)	15,272	28,139
Ending balance	1,563,603	1,361,628
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	555	551
Exercise of stock options	1	2
Other comprehensive income:
Ending balance	556	553
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	554,168	529,100
Stock-based compensation	3,659	5,053
Exercise of stock options	386	479
Shares issued under equity awards (taxes paid related to net share settlement of equity awards), net	(4,803)	(3,135)
Other	44	(123)
Dividends	173	172
Other comprehensive income:
Ending balance	553,627	531,546
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(563,481)	(564,376)
Purchase of common stock	(31,512)
Other	170	299
Other comprehensive income:
Ending balance	(594,823)	(564,077)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,669,751	1,556,980
Net earnings	43,929	35,183
Dividends	(7,608)	(7,600)
Other comprehensive income:
Ending balance	1,706,072	1,584,563
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(115,883)	(215,006)
Other comprehensive income:
Pension funded status adjustment, net of tax	240	291
Net unrealized gain (loss) on derivative instruments (net of tax)	3,897	2,343
Foreign currency translation adjustment (excludes losses related to redeemable noncontrolling interests)	15,272	28,139
Ending balance	(96,474)	(184,233)
Contra-Equity
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(5,355)	(6,724)
Other comprehensive income:
Ending balance	(5,355)	(6,724)
Non- redeemable Non- Controlling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	3,821	3,537
Dissolution of joint venture	(47)
Other comprehensive income:
Foreign currency translation adjustment (excludes losses related to redeemable noncontrolling interests)	49	8
Ending balance	$ 3,823	$ 3,545

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