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SUMMARY OF TOTAL REVENUES BY GEOGRAPHIC REGION (Details) - USD ($) $ in Millions | 12 Months Ended
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May 31, 2019 | May 31, 2018 | May 31, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues |  | $ 39,506 | $ 39,383 | $ 37,792
Americas [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues |  | 21,856 | 21,648 | 21,121
EMEA [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | [1] | 11,270 | 11,409 | 10,614
Asia Pacific [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues |  | $ 6,380 | $ 6,326 | $ 6,057
[1] | Comprised of Europe, the Middle East and Africa

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