Leases - Assets and Liabilities (Details) - USD ($) $ in Millions	May 31, 2022	May 31, 2021
Leases [Abstract]
Operating lease right-of-use assets, net	$ 81.9	$ 78.6
Finance leases	8.1	10.2
Total lease assets	90.0	88.8
Operating lease liabilities	20.8	25.0
Operating lease liabilities	69.8	67.4
Total operating lease liabilities	90.6	92.4
Current portion	$ 2.3	$ 2.2
Other noncurrent liabilities	Other noncurrent liabilities	Other noncurrent liabilities
Non-current portion	$ 6.7	$ 8.8
Total finance lease liabilities	9.0	11.0
Total lease liabilities	$ 99.6	$ 103.4
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant and equipment, net	Property, plant and equipment, net
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other accrued expenses	Other accrued expenses