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%