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Share-Based Compensation Plans (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
May 31, 2021 | Nov. 30, 2021
Share-based compensation plans |  |
Expected recognition period for unrecognized share-based compensation |  | 2 years 2 months 12 days
Target achievement for Performance Condition Awards, as a percentage |  | 175.00%
Restricted Stock |  |
Share-based compensation plans |  |
Number of awards granted (in shares) | 143,340 |
Unrecognized share-based compensation |  | $ 33.8
Service Condition Awards |  |
Share-based compensation plans |  |
Number of awards granted (in shares) | 83,227 |
Grant date fair value of shares granted in period (in dollars per share) | $ 219.02 |
Market Condition Awards |  |
Share-based compensation plans |  |
Number of awards granted (in shares) | 71,670 |
Grant date fair value of shares granted in period (in dollars per share) | $ 156.08 |
Performance Condition Awards |  |
Share-based compensation plans |  |
Number of awards granted (in shares) | 71,670 |
Grant date fair value of shares granted in period (in dollars per share) | $ 216.20 |

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- Definition Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Target Achievement, Percentage + References No definition available. + Details
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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued 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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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