Leases - Schedule of Lease Expense and Liabilities (Details) $ in Millions	12 Months Ended
	Mar. 31, 2020 USD ($)
Leases [Abstract]
Operating lease expense	$ 50.8
Variable lease expense	10.8
Short-term lease expense	8.8
Total lease expense	70.4
Other assets:
Right-of-use assets	119.5
Accrued liabilities:
Current portion of lease liabilities	44.5
Other long-term liabilities:
Non-current portion of lease liabilities	94.7
Total lease liabilities	$ 139.2
Right-of-use assets [Extensible List]	us-gaap:OtherAssetsNoncurrent
Current portion of lease liabilities [Extensible List]	us-gaap:AccruedLiabilitiesCurrent
Non-current portion of lease liabilities [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Weighted average remaining lease-term (in years)	4 years 4 months 24 days
Weighted average discount rate	4.60%