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Schedule of Swiss Plan's Asset Allocation (Detail) | Jun. 30, 2017 | Jun. 30, 2016
--- | --- | ---
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 | 10.00% | 15.00%
Equity Investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Percentage of plan assets | 52.00% | 51.00%
Real Estate |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Percentage of plan assets | 26.00% | 28.00%
Cash |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Percentage of plan assets | 9.00% | 3.00%
Alternative Investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Percentage of plan assets | 3.00% | 3.00%

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