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Income Taxes and Other Taxes (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Nov. 30, 2021	Aug. 31, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Operating Loss Carryforwards [Line Items]
Current liability	$ 3.2			$ 3.2
Long term liability	$ 3.8			$ 3.8
Effective income tax rate (percentage)	23.20%		26.10%	21.10%	(9.50%)
Tax Years 2015 to 2020
Operating Loss Carryforwards [Line Items]
Income taxes receivable	$ 20.0			$ 20.0
Employee Retention Credits
Operating Loss Carryforwards [Line Items]
Income taxes receivable	$ 11.9			$ 11.9
Carry Back of Net Operating Losses
Operating Loss Carryforwards [Line Items]
Proceeds from Income Tax Refunds		$ 63.1

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- Definition

Deferred Tax Lability, Current, Social Security Payments

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Also called income tax refund receivable.

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The amount of cash received during the period as refunds for the overpayment of taxes.

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