FAIR VALUE MEASUREMENTS - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Nov. 30, 2025	May 31, 2025
Assets, Fair Value Disclosure [Abstract]
Cash	$ 1,758	$ 1,221
ASSETS AT FAIR VALUE	8,345	9,151
CASH AND EQUIVALENTS	6,974	7,464
SHORT-TERM INVESTMENTS	1,371	1,687
Level 1 | U.S. Treasury securities
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	701	1,046
CASH AND EQUIVALENTS	0	0
SHORT-TERM INVESTMENTS	701	1,046
Level 2
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	5,886	6,884
CASH AND EQUIVALENTS	5,216	6,243
SHORT-TERM INVESTMENTS	670	641
Level 2 | Commercial paper and bonds
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	676	675
CASH AND EQUIVALENTS	28	45
SHORT-TERM INVESTMENTS	648	630
Level 2 | Money market funds
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	4,899	5,902
CASH AND EQUIVALENTS	4,899	5,902
SHORT-TERM INVESTMENTS	0	0
Level 2 | Time deposits
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	289	297
CASH AND EQUIVALENTS	289	295
SHORT-TERM INVESTMENTS	0	2
Level 2 | U.S. Agency securities
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	22	10
CASH AND EQUIVALENTS	0	1
SHORT-TERM INVESTMENTS	$ 22	$ 9