Significant Accounting Policies - Foreign Currency Transactions (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Other income (expense), net
Foreign Currency Transactions
Net foreign currency exchange gains (losses)	$ (1.0)	$ (0.6)	$ 0.2	$ (0.5)

Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 45
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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