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STOCK-BASED COMPENSATION - Additional Information (Details) $ / shares in Units, $ in Millions | 12 Months Ended
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May 31, 2025 USD ($) award $ / shares shares | May 31, 2024 $ / shares shares | May 31, 2023 $ / shares shares
Share Based Compensation Arrangement Stock Options [Abstract] |  |  |
Number of award types | award | 3 |  |
Maximum term of stock options | 10 years |  |
Restricted stock granted (in shares) | shares |  | 169,371 | 160,286
Restricted stock, weighted-average fair value (in dollar per share) | $ / shares |  | $ 239.33 | $ 208.57
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Abstract |  |  |
Total unrecognized compensation cost, net of estimated forfeitures | $ | $ 219 |  |
Stock option remaining weighted-average vesting period | 2 years |  |
Ratio Of Outstanding And Available To Grant Shares To Total Outstanding Common And Equity Compensation Shares And Equity Compensation Shares Available For Grant [Abstract] |  |  |
Ratio of outstanding and available to grant shares | 9.00% |  |
Restricted Stock |  |  |
Share Based Compensation Arrangement Stock Options [Abstract] |  |  |
Stock option vesting period | 4 years |  |
Restricted stock granted (in shares) | shares | 150,967 |  |
Restricted stock, weighted-average fair value (in dollar per share) | $ / shares | $ 276.44 |  |
Restricted Stock Units (RSUs) |  |  |
Share Based Compensation Arrangement Stock Options [Abstract] |  |  |
Stock option vesting period | 1 year |  |
Minimum | Employee Stock Option |  |  |
Share Based Compensation Arrangement Stock Options [Abstract] |  |  |
Stock option vesting period | 1 year |  |
Maximum | Employee Stock Option |  |  |
Share Based Compensation Arrangement Stock Options [Abstract] |  |  |
Stock option vesting period | 4 years |  |

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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://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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