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Schedule of Swiss Plan's Asset Allocation (Detail) - Fair Value, Inputs, Level 2 | Jun. 30, 2018 | Jun. 30, 2017
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Defined Benefit Plan Disclosure [Line Items] |  |
Percentage of plan assets | 100.00% | 100.00%
Fixed Income Investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Percentage of plan assets | 12.00% | 10.00%
Equity Investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Percentage of plan assets | 50.00% | 52.00%
Real Estate |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Percentage of plan assets | 31.00% | 26.00%
Cash |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Percentage of plan assets | 4.00% | 9.00%
Other |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Percentage of plan assets | 3.00% | 3.00%

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- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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