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RESTRUCTURING ACTIVITIES Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Nov. 30, 2020 | Nov. 30, 2019 | Nov. 30, 2020 | Nov. 30, 2019
Restructuring reserve [Line Items] |  |  |  |
Restructuring expenses | $ 96 | $ 42 | $ 270 | $ 120
Fiscal 2019 Oracle Restructuring [Member] |  |  |  |
Restructuring reserve [Line Items] |  |  |  |
Restructuring expenses |  |  | $ 269 | $ 125

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