Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2019	Mar. 31, 2018
Income Taxes [Abstract]
Effective income tax rate	18.20%	13.40%
Forecast [Member]
Net of valuation allowance, classification [Abstract]
Lapse of statute of limitations			$ (2.2)
Unrecognized tax benefits that would impact effective tax rate			1.6
Foreign Tax Reforms [Member]
Net of valuation allowance, classification [Abstract]
Valuation allowance - deferred tax assets	$ 33.7
Reversal of deferred tax asset valuation allowances	(2.0)
Domestic Tax Jurisdiction [Member]
Net of valuation allowance, classification [Abstract]
Valuation allowance - deferred tax assets	$ 7.0
Research Tax Credit Carryforward [Member]
Tax Credit Carryforward [Line Items]
Tax benefit from foreign development tax credit		$ 3.5
U.S Tax Reforms [Member]
Effective income tax rate reconciliation [Abstract]
Provisional discrete tax charges				$ 38.0
Deferred tax assets - change in amount				(19.0)
Transition tax charge				19.0
Transition tax liability				$ 19.0
Term of estimated tax liability for transition tax	8 years
U.S Tax Reforms [Member] | Forecast [Member]
Effective income tax rate reconciliation [Abstract]
Estimated transition tax liability to be paid in the future			$ 1.5