Schedule of Swiss Plan's Asset Allocation (Detail)	Jun. 30, 2016	Jun. 30, 2015
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	15.00%	22.00%
Equity Investments
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan assets	51.00%	52.00%
Real Estate
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan assets	28.00%	16.00%
Cash
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan assets	3.00%	8.00%
Alternative Investments
Defined Benefit Plan Disclosure [Line Items]
Percentage of plan assets	3.00%	2.00%