Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
3 Months Ended
Jun. 30, 2019
Jul. 31, 2019
Document and Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2019  
Document Transition Report false  
Entity File Number 001-15491  
Entity Registrant Name KEMET CORP  
Entity Central Index Key 0000887730  
Current Fiscal Year End Date --03-31  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 57-0923789  
Entity Address, Address Line One KEMET Tower, One East Broward Blvd.  
Entity Address, City or Town Fort Lauderdale  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 33301  
City Area Code 954  
Local Phone Number 766-2800  
Title of 12(b) Security Common Stock, par value $0.01  
Trading Symbol KEM  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   58,025,570