Pension Plans - Schedule of Net Pension Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Retirement Benefits [Abstract]
Service costs	$ 0.4	$ 0.4
Interest costs	0.2	0.3
Amortization of actuarial loss	0.2	0.3
Net pension period cost	$ 0.8	$ 1.0