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Income Taxes - Additional Information (Details) $ in Millions | 3 Months Ended | 6 Months Ended
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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

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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 + Details
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