DEFERRED CONTRIBUTION PLANS (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
May 31, 2019 |
May 31, 2018 |
May 31, 2017 |
|
| Defined Contribution Plan Disclosure [Line Items] | |||
| Defined contribution plan expense | $ 380 | $ 384 | $ 366 |
| US [Member] | |||
| Defined Contribution Plan Disclosure [Line Items] | |||
| Oracle 401(K) Plan employee contribution maximum rate | 40.00% | ||
| Oracle 401 (K) employer contribution match rate | 50.00% | ||
| Oracle 401(K) employer maximum match on employee contribution each pay period | 6.00% | ||
| Oracle 401 (K) plan employer contribution | $ 154 | $ 151 | $ 157 |