Document and Entity Information (USD $)	12 Months Ended
	Mar. 31, 2013	May 31, 2013	Sep. 30, 2012
Document and Entity Information
Entity Registrant Name	KEMET CORP
Entity Central Index Key	0000887730
Document Type	10-K
Document Period End Date	Mar. 31, 2013
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 191,430,857
Entity Common Stock, Shares Outstanding		45,074,433
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY