TAX BENEFITS FROM EXERCISES OF STOCK OPTIONS AND VESTING OF RESTRICTED STOCK-BASED AWARDS (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
May 31, 2019 |
May 31, 2018 |
May 31, 2017 |
|
| Tax Benefits from Exercise of Stock Options and Vesting of Restricted Stock-Based Awards [Abstract] | |||
| Total cash received as a result of option exercises | $ 2,000 | $ 2,300 | $ 2,100 |
| Aggregate intrinsic value of vesting of restricted stock-based awards and options exercised | 3,100 | 3,000 | 2,000 |
| Tax benefits realized in connection with the vesting of restricted stock-based awards and exercises of stock options | $ 692 | $ 860 | $ 614 |