Name:	kem_DebtInstrumentBorrowingBaseCalculationComponentOnePercentageOfAccountsReceivableOfBorrowerSatisfyingEligibilityCriteria
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Represents the fixed amount for determining the value, which forms the third component of the calculation of borrowing base for debt instruments.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Represents the fixed amount for determining the value, which forms the second component of the calculation of borrowing base for debt instruments.

No definition available.

Name:	kem_DebtInstrumentBorrowingBaseCalculationComponentTwoFixedAmountSatisfyingEligibilityCriteria
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Data Type:	xbrli:monetaryItemType
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Represents the percentage of the net book value of the borrower that satisfies certain eligibility criteria for determining value, which forms the second component of the calculation of borrowing base for debt instruments.

No definition available.

Name:	kem_DebtInstrumentBorrowingBaseCalculationComponentTwoPercentageOfNetBookValueOfInventoryOfBorrowerSatisfyingEligibilityCriteria
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Data Type:	num:percentItemType
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Represents the percentage of the net orderly liquidation percentage of the appraised value of equipment that satisfies certain eligibility criteria for determining value, which forms the second component of the calculation of borrowing base for debt instruments.

No definition available.

Name:	kem_DebtInstrumentBorrowingBaseCalculationPercentageOfNetOrderlyLiquidationPercentageOfAppraisedValueOfEquipmentSatisfyingEligibilityCriteria
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Data Type:	num:percentItemType
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Period Type:	instant

Debt Instrument Borrowing Base Calculation Percentage of Net Orderly Liquidation Percentage of Appraised Value of Inventory Satisfying Eligibility Criteria

No definition available.

Name:	kem_DebtInstrumentBorrowingBaseCalculationPercentageofNetOrderlyLiquidationPercentageofAppraisedValueofInventorySatisfyingEligibilityCriteria
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Data Type:	num:percentItemType
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Period Type:	instant

Represents the percentage of available revolving credit considered for determining cash dominion trigger event in favor of the administrative agent related to debt instrument.

No definition available.

Name:	kem_DebtInstrumentCashDominionTriggerEventPercentageOfRevolvingCreditAvailable
Namespace Prefix:	kem_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the period considered for determining cash dominion trigger event in favor of the administrative agent related to debt instrument.

No definition available.

Name:	kem_DebtInstrumentCashDominionTriggerEventPeriodConsidered
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Data Type:	xbrli:durationItemType
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Period Type:	duration

Represents the amount of available revolving credit considered for determining cash dominion trigger event in favor of the administrative agent related to debt instrument.

No definition available.

Name:	kem_DebtInstrumentCashDominionTriggerEventRevolvingCreditAvailable
Namespace Prefix:	kem_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the percentage of assets pledged to secure a debt instrument.

No definition available.

Name:	kem_DebtInstrumentCollateralPercentage
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the fixed charge coverage ratio, which is necessary to be maintained under the terms of covenants of the senior credit facility.

No definition available.

Name:	kem_DebtInstrumentCovenantFixedChargeCoverageRatio
Namespace Prefix:	kem_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

Represents the percentage of available revolving credit considered for determining fixed charge coverage ratio required to be maintained related to debt instrument.

No definition available.

Name:	kem_DebtInstrumentCovenantFixedChargeCoverageRatioPercentageOfRevolvingCreditAvailable
Namespace Prefix:	kem_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the required period of non occurrence of any condition to maintain specified fixed charge coverage ratio.

No definition available.

Name:	kem_DebtInstrumentCovenantFixedChargeCoverageRatioPeriodConsideredForNonOccurrenceOfSpecifiedConditions
Namespace Prefix:	kem_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the amount of available revolving credit considered for determining fixed charge coverage ratio required to be maintained related to debt instrument.

No definition available.

Name:	kem_DebtInstrumentCovenantFixedChargeCoverageRatioRevolvingCreditAvailable
Namespace Prefix:	kem_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the average daily balance of the facility as a percentage of revolving commitment considered for determining commitment fee percentage.

No definition available.

Name:	kem_LineOfCreditFacilityUnusedCapacityAverageDailyBalanceAsPercentageOfRevolvingCommitment
Namespace Prefix:	kem_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

No definition available.

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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Data Type:	na
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Name:	kem_RevolvingCommitmentPercentageByRangeOfAverageDailyBalanceAxis=kem_AverageDailyBalanceBetween33.3PercentAnd66.6PercentOfRevolvingCommitmentMember
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Namespace Prefix:
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Name:	dei_LegalEntityAxis=kem_KEMETElectronicsMarketingSPteLtdMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_ForeignLineOfCreditMember
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Data Type:	na
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Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
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Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
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Data Type:	na
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Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_DomesticLineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	dei_LegalEntityAxis=kem_KEMETElectronicsCorporationMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
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