Consolidated Condensed Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Income Statement [Abstract]
Net sales	$ 576,048	$ 569,134	$ 1,176,651	$ 1,131,202
Cost of goods sold	412,094	414,195	846,363	825,848
Inventory write-off relating to exit activities - See Note 8	2,659	0	2,659	0
Gross profit	161,295	154,939	327,629	305,354
Operating expenses	93,493	89,561	192,498	174,069
Restructuring and other exit charges - See Note 8	4,893	2,629	6,190	3,847
Legal proceedings charge	0	3,201	0	3,201
Gain on sale of facility			0	(4,348)
Operating earnings	62,909	59,548	128,941	128,585
Interest expense	5,513	5,020	11,174	11,367
Other (income) expense, net	(582)	736	751	1,431
Earnings before income taxes	57,978	53,792	117,016	115,787
Income tax expense	15,185	14,024	29,604	28,085
Net earnings	42,793	39,768	87,412	87,702
Net losses attributable to noncontrolling interests	(2,843)	(257)	(2,797)	(710)
Net earnings attributable to EnerSys stockholders	$ 45,636	$ 40,025	$ 90,209	$ 88,412
Net earnings per common share attributable to EnerSys stockholders:
Basic earnings per common share attributable to EnerSys stockholders (in dollars per share)	$ 1.05	$ 0.89	$ 2.08	$ 1.98
Diluted earnings per common share attributable to EnerSys stockholders (in dollars per share)	1.04	0.87	2.06	1.91
Dividends per common share (in dollars per share)	$ 0.175	$ 0.175	$ 0.35	$ 0.35
Weighted average shares of common stock outstanding:
Basic	43,426,955	44,944,027	43,348,449	44,588,971
Diluted	43,949,543	46,005,399	43,889,678	46,380,887