Government Subsidies (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Aug. 31, 2020	Feb. 28, 2022	Feb. 28, 2021	May 31, 2021	Dec. 31, 2021
Unusual or Infrequent Item, or Both [Line Items]
Deferred payroll taxes, CARES Act							$ 6.2
Cost of sales
Unusual or Infrequent Item, or Both [Line Items]
Contra-expense recognized for grant received from the Payroll Support Program under the CARES Act						$ 47.5
Selling, general and administrative expenses
Unusual or Infrequent Item, or Both [Line Items]
Contra-expense recognized for grant received from the Payroll Support Program under the CARES Act						$ 1.0
Covid-19
Unusual or Infrequent Item, or Both [Line Items]
Period for repayment of deferred payroll taxes, CARES Act				2 years
Deferred payroll taxes, CARES Act	$ 6.2			$ 6.2
Proceeds From Government Assistance Cares Act			$ 57.2
Grant proceeds to be used for payment of employee wages, salaries and benefits under the CARES Act				48.5
Foreign subsidies received related to COVID-19	1.0	$ 1.2		3.4	$ 6.1
Covid-19 | Payroll Support Program Promissory Note
Unusual or Infrequent Item, or Both [Line Items]
Promissory note proceeds	$ 8.7			$ 8.7
Debt instrument term				10 years
First five years | Covid-19 | Payroll Support Program Promissory Note
Unusual or Infrequent Item, or Both [Line Items]
Interest rate (as a percent)	1.00%			1.00%
Six to ten years | Covid-19 | Payroll Support Program Promissory Note
Unusual or Infrequent Item, or Both [Line Items]
Interest rate (as a percent)	2.00%			2.00%
First five years, interest in kind | Covid-19 | Payroll Support Program Promissory Note
Unusual or Infrequent Item, or Both [Line Items]
Interest rate (as a percent)	3.00%			3.00%
Remaining term, interest in kind | Covid-19 | Payroll Support Program Promissory Note
Unusual or Infrequent Item, or Both [Line Items]
Annual increase to the interest rate (as a percent)	1.00%			1.00%