Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Restructuring and Impairment Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Nov. 30, 2021	Nov. 30, 2020
Restructuring and Impairment Costs
Rotable asset impairment charges		$ 5.8	$ 2.9	$ 7.0
Cost of sales and Selling, general and administrative expenses
Restructuring and Impairment Costs
Severance and furlough-related costs				$ 8.2
PBH contracts
Restructuring and Impairment Costs
Rotable asset impairment charges	$ 2.3