FAIR VALUE MEASUREMENTS - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Nov. 30, 2024	May 31, 2024
Assets, Fair Value Disclosure [Abstract]
SHORT-TERM INVESTMENTS	$ 1,782	$ 1,722
Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Cash	1,372	1,222
ASSETS AT FAIR VALUE	9,761	11,582
CASH AND EQUIVALENTS	7,979	9,860
SHORT-TERM INVESTMENTS	1,782	1,722
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | U.S. Treasury securities
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	1,167	1,175
CASH AND EQUIVALENTS	18	155
SHORT-TERM INVESTMENTS	1,149	1,020
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	7,222	9,185
CASH AND EQUIVALENTS	6,589	8,483
SHORT-TERM INVESTMENTS	633	702
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Commercial paper and bonds
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	632	591
CASH AND EQUIVALENTS	32	17
SHORT-TERM INVESTMENTS	600	574
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Money market funds
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	5,975	8,119
CASH AND EQUIVALENTS	5,975	8,119
SHORT-TERM INVESTMENTS	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Time deposits
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	606	440
CASH AND EQUIVALENTS	582	347
SHORT-TERM INVESTMENTS	24	93
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | U.S. Agency securities
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	9	35
CASH AND EQUIVALENTS	0	0
SHORT-TERM INVESTMENTS	$ 9	$ 35