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Income Taxes - Additional Information (Details)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Income Tax Disclosure [Abstract]    
Increase in income taxes, federal research credit $ 6.3 $ 4.2
Increase in income taxes, value of assets held within Deferred Savings Plan 1.9  
Increase in income taxes, foreign income tax rate differential 1.9 3.2
Increase in unrecognized tax benefits is reasonably possible $ 3.9 $ 3.9