Stock-Based Compensation Plans (Other Information Pertaining to LTIP Performance-Based Stock Options) (Details) - LTIP Performance-Based Stock Options [Member] - USD ($) $ in Millions |
12 Months Ended | ||
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May 31, 2023 |
May 31, 2022 |
May 31, 2021 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Total intrinsic value of stock options exercised | $ 0.7 | $ 16.0 | $ 26.3 |
| Total grant-date fair value of stock options vested | $ 8.0 | ||
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- Definition 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. No definition available.
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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