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Income Taxes - Additional Information Regarding Examinations (Detail)
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2016
Jun. 30, 2011
Earliest Tax Year | Foreign Country        
Income Tax Examination [Line Items]        
Tax years subject to examination 1996      
Latest Tax Year | Foreign Country        
Income Tax Examination [Line Items]        
Tax years subject to examination 2018      
Internal Revenue Service (IRS) | Earliest Tax Year        
Income Tax Examination [Line Items]        
Tax years under audit   2010 2007 2004
Tax years subject to examination 2004      
Tax years expected to be subject to examination 2014      
Internal Revenue Service (IRS) | Latest Tax Year        
Income Tax Examination [Line Items]        
Tax years under audit   2013 2009 2006
Tax years subject to examination 2013      
Tax years expected to be subject to examination 2017