| Document And Entity Information | Jul. 26, 2019 |
| Document Information [Line Items] | |
| EntityRegistrantName | AVX Corp |
| DocumentType | 8-K |
| DocumentPeriodEndDate | Jul. 26, 2019 |
| EntityIncorporationStateCountryCode | DE |
| EntityFileNumber | 1-7201 |
| EntityTaxIdentificationNumber | 33-0379007 |
| EntityAddressAddressLine1 | 1 AVX Boulevard |
| EntityAddressCityOrTown | Fountain Inn |
| EntityAddressStateOrProvince | SC |
| EntityAddressPostalZipCode | 29644 |
| CityAreaCode | 864 |
| LocalPhoneNumber | 967-2150 |
| WrittenCommunications | false |
| SolicitingMaterial | false |
| PreCommencementTenderOffer | false |
| PreCommencementIssuerTenderOffer | false |
| Security12bTitle | Common Stock |
| TradingSymbol | AVX |
| SecurityExchangeName | NYSE |
| AmendmentFlag | false |
| EntityCentralIndexKey | 0000859163 |
| EntityEmergingGrowthCompany | false |
