Significant Accounting Policies - Income Taxes (Details) - USD ($) $ in Millions	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021
Accounting Policies [Abstract]
Deferred tax liability	$ 43.7		$ 45.8
Deferred tax benefit	$ 2.0	$ 3.0
Effective tax rate	22.90%	23.90%