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Income Taxes (Detail)
$ in Millions
6 Months Ended
Dec. 31, 2016
USD ($)
Income Tax Disclosure [Abstract]  
Foreign tax credits related to future repatriations of earnings $ 14.2
Advance Pricing Agreement Settlement 0.4
Advance Pricing Agreement Revenue Transfer 1.8
Gross potential research and development (R&D) tax credit 7.1
Unrecognized tax benefits associated with federal tax credits 3.8
Deferred Income Tax Expense (Benefit) $ 3.3