Leases (Narratives) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Dec. 31, 2021	Mar. 31, 2021
Leases [Abstract]
Right Of Use Asset Obtained In Exchange For Operating Lease Liability	$ 384.5	$ 513.6
Right Of Use Asset Obtained In Exchange For Finance Lease Liability	79.3	92.5
Cash paid for operating leases	22.6	22.0
Cash paid for finance leases	$ 129.2	$ 173.5