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Capital Stock and Stock-Based Awards - Schedule of restricted stock units under the management stock purchase plan (Details) - Management Stock Purchase Plan - $ / shares	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	37,865	33,761	5,665
Purchase price per unit (in dollars per share)	$ 25.51	$ 24.67	$ 16.88

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- Definition

Price per share of restricted stock units under the management stock purchase plan during the period.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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