Leases (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Right Of Use Asset Obtained In Exchange For Operating Lease Liability	$ 347.4	$ 513.6
Right Of Use Asset Obtained In Exchange For Finance Lease Liability	74.2	92.5
Operating Cash Flows For Financing Leases	30.2	29.3	$ 25.9
Cash paid for finance leases	166.3	221.2	307.8
Cash paid for operating leases	$ 3.7	$ 6.8	$ 15.4