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Schedule of Projected and Accumulated Benefit Obligations Rates (Detail) | Jun. 30, 2018 | Jun. 30, 2017
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Defined Benefit Pension Plans And Defined Benefit Postretirement Plans Disclosure [Abstract] |  |
Discount rate | 0.90% | 0.80%
Salary increase rate | 2.00% | 2.00%

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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