Income Taxes - Schedule of Income Before Income Taxes for the Company's Domestic and Foreign Operations(Details) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Domestic	$ 140.3	$ 56.0	$ 17.3
Foreign	19.9	14.2	4.2
Income before income taxes	$ 160.2	$ 70.2	$ 21.5

The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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