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Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Possible decrease in tax expense in next 12 months	$ 13,700,000		$ 13,700,000
Taxes paid on cash distribution	15,100,000		15,100,000		$ 28,500,000
Reversal of U.S. undistributed earnings accrual	$ 0		$ 14,800,000
Effective income tax rate	30.90%	25.50%	31.60%	35.80%
Increase (decrease) in income tax expense	$ 12,400,000		$ (2,000,000.0)
Effect of foreign tax rates	7,600,000
Effect of U.S. tax reform, BEAT	3,100,000		16,100,000
Income tax expense from reorganization	8,000,000.0		16,300,000
Effect of U.S. tax reform	(5,100,000)		(15,900,000)
TCJA tax expense, provisional					$ 19,000,000.0
Measurement period adjustment	$ 0		900,000
TCJA tax expense, after adjustments			$ 18,100,000

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