Document and Entity Information	9 Months Ended
	Dec. 31, 2012	Feb. 04, 2013
Document and Entity Information
Entity Registrant Name	KEMET CORP
Entity Central Index Key	0000887730
Document Type	10-Q
Document Period End Date	Dec. 31, 2012
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		44,921,629
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3