FAIR VALUE MEASUREMENTS - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Feb. 28, 2026	May 31, 2025
Assets, Fair Value Disclosure [Abstract]
Cash	$ 1,693	$ 1,221
ASSETS AT FAIR VALUE	8,057	9,151
CASH AND EQUIVALENTS	6,660	7,464
SHORT-TERM INVESTMENTS	1,397	1,687
Level 1 \| U.S. Treasury securities
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	727	1,046
CASH AND EQUIVALENTS	0	0
SHORT-TERM INVESTMENTS	727	1,046
Level 2
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	5,637	6,884
CASH AND EQUIVALENTS	4,967	6,243
SHORT-TERM INVESTMENTS	670	641
Level 2 \| Commercial paper and bonds
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	680	675
CASH AND EQUIVALENTS	28	45
SHORT-TERM INVESTMENTS	652	630
Level 2 \| Money market funds
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	4,787	5,902
CASH AND EQUIVALENTS	4,787	5,902
SHORT-TERM INVESTMENTS	0	0
Level 2 \| Time deposits
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	150	297
CASH AND EQUIVALENTS	150	295
SHORT-TERM INVESTMENTS	0	2
Level 2 \| U.S. Agency securities
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	20	10
CASH AND EQUIVALENTS	2	1
SHORT-TERM INVESTMENTS	$ 18	$ 9

Fair value portion of asset recognized for present right to economic benefit.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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