FAIR VALUE MEASUREMENTS - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Aug. 31, 2026	May 31, 2026
Assets, Fair Value Disclosure [Abstract]
Cash	$ 1,568	$ 1,719
ASSETS AT FAIR VALUE	8,368	9,027
CASH AND EQUIVALENTS	6,903	7,563
SHORT-TERM INVESTMENTS	1,465	1,464
Level 1 \| U.S. Treasury securities
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	755	769
CASH AND EQUIVALENTS	3	2
SHORT-TERM INVESTMENTS	752	767
Level 2
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	6,045	6,539
CASH AND EQUIVALENTS	5,332	5,842
SHORT-TERM INVESTMENTS	713	697
Level 2 \| Commercial paper and bonds
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	728	710
CASH AND EQUIVALENTS	15	13
SHORT-TERM INVESTMENTS	713	697
Level 2 \| Money market funds
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	4,966	5,601
CASH AND EQUIVALENTS	4,966	5,601
SHORT-TERM INVESTMENTS	0	0
Level 2 \| Time deposits
Assets, Fair Value Disclosure [Abstract]
ASSETS AT FAIR VALUE	351	228
CASH AND EQUIVALENTS	351	228
SHORT-TERM INVESTMENTS	$ 0	$ 0

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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