Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2020	May 31, 2019
Loss Contingencies [Line Items]
Deferred Tax Liabilities, Net	$ 89.6	$ 96.8
Deferred Tax Assets, Net	17.9	25.4
Operating Loss Carryforwards, Valuation Allowance		1.3
Unrecognized tax benefits	3.1	12.3	$ 10.2	$ 9.0
Income tax penalties and interest accrued	0.3	2.6	2.2
Unrecognized tax benefits that would impact effective tax rate	3.1	12.3	10.2
Tax (expense) benefit from income tax penalties and interest expense	2.3	0.5	$ 0.8
Period increase (decrease) in unrecognized tax benefits	9.2	(2.1)
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	0.0	8.2
Tax Adjustments, Settlements, and Unusual Provisions	0.0
State and Local Jurisdiction
Loss Contingencies [Line Items]
Operating Loss Carryforwards, Valuation Allowance	8.6
Non-United States
Loss Contingencies [Line Items]
Operating Loss Carryforwards, Valuation Allowance	25.3
Other Noncurrent Liabilities
Loss Contingencies [Line Items]
Deferred Tax Liabilities, Net	3.6	$ 0.0
Deferred Tax Assets, Net	$ 21.5