RISK MANAGEMENT AND DERIVATIVES - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Nov. 30, 2025	May 31, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Deferred net losses (net of tax) expected to be reclassified to Net Income during the next 12 months	$ 68
Maximum term over which the company hedges exposures to the variability of cash flows for its forecasted transactions	33 months
Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total notional amount of outstanding derivatives	$ 4,600	$ 4,000
Derivatives designated as cash flow hedges | Derivatives formally designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total notional amount of outstanding derivatives	16,800	18,400
Fair Value Hedging | Derivatives formally designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total notional amount of outstanding derivatives	$ 2,400	$ 2,400