Represents the amount of loss contingency accrual adjustment.

No definition available.

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Namespace Prefix:	avx_
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Balance Type:	credit
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- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
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-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Increase (decrease) in the accrual for environmental loss contingencies during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 5.Y.Q2)
-URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751

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Balance Type:	na
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- Definition

Amount of loss contingency liability.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of loss contingency liability expected to be resolved within one year or the normal operating cycle, if longer.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of loss contingency liability expected to be resolved after one year or beyond the normal operating cycle, if longer.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of damages awarded to the plaintiff in the legal matter.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of another entity's patents that the entity has allegedly infringed.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingencyPatentsAllegedlyInfringedNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
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- Details

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- Details

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- Details

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- Details

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Note 9 - Commitments and Contingencies (Details Textual) $ in Thousands				3 Months Ended	9 Months Ended	12 Months Ended
	Jan. 15, 2019 USD ($)	Mar. 30, 2018 USD ($)	Apr. 25, 2013	Dec. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2018 USD ($)
Accrual for Environmental Loss Contingencies, Period Increase (Decrease), Total				$ 8,312
Accrual for Environmental Loss Contingencies, Ending Balance				22,272	$ 22,272
Greatbatch, Inc. v AVX Corporation [Member]
Loss Contingency, Damages Awarded, Value						$ 37,500
Loss Contingency Accrual, Adjustment		$ 1,500		$ 13,900	$ 13,900
Greatbatch, Inc. v AVX Corporation [Member] \| Subsequent Event [Member]
Loss Contingency, Damages Awarded, Value	$ 22,100
Greatbatch, Inc. v AVX Corporation And Presidio Components v. American Technical Ceramics Corp. [Member]
Loss Contingency, Pending Claims, Number, Ending Balance				2	2
Unfavorable Regulatory Action - Environmental Matters [Member]
Loss Contingency Accrual, Ending Balance				$ 26,658	$ 26,658		$ 18,618
Loss Contingency, Accrual, Current				6,036	6,036		3,329
Loss Contingency, Accrual, Noncurrent				20,622	20,622		$ 15,289
Unfavorable Regulatory Action - Patent Infringement Matters [Member] \| Greatbatch, Inc. v AVX Corporation [Member] \| Minimum [Member]
Loss Contingency, Patents Allegedly Infringed, Number			1
Unfavorable Regulatory Action - Patent Infringement Matters [Member] \| Greatbatch, Inc. v AVX Corporation [Member] \| Maximum [Member]
Loss Contingency, Patents Allegedly Infringed, Number			6
Unfavorable Regulatory Action - Patent Infringement Matters [Member] \| Greatbatch, Inc. v AVX Corporation And Presidio Components v. American Technical Ceramics Corp. [Member]
Loss Contingency Accrual, Ending Balance				$ 59,683	$ 59,683