STOCK-BASED COMPENSATION - Schedule of Stock Option Vesting (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
May 31, 2026 |
May 31, 2025 |
May 31, 2024 |
|
| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] | |||
| Stock Options, Vested (in shares) | 1,594,620 | 1,896,584 | 2,599,042 |
| Stock Options, Fair value | $ 130 | $ 116 | $ 137 |