Benefit Plans (Contributions to Non-Qualified Deferred Compensation Plans) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Foreign Savings Plans \| AVX Corporation \| Key Employees
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plans	¥ 750	¥ 658	¥ 659

The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement.

No definition available.

Name:	us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration