v3.26.3
RISK MANAGEMENT AND DERIVATIVES - Additional Information (Details) - USD ($)
 3 Months Ended
Aug. 31, 2026
May 31, 2026
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Reduction in derivative assets if netted $ 179,000,000 $ 175,000,000
Reduction in derivative liabilities if netted 179,000,000 175,000,000
Fair value of derivative liability collateral 145,000,000 119,000,000
Fair value of collateral 0 0
Deferred net losses (net of tax) expected to be reclassified to net income during the next 12 months $ 101,000,000  
Maximum term over which the company hedges exposures to the variability of cash flows for its forecasted transactions 32 months  
Derivatives not designated as hedging instruments    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Total notional amount of outstanding derivatives $ 5,400,000,000 5,000,000,000.0
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 15,900,000,000 16,400,000,000
Fair Value Hedging | Derivatives formally designated as hedging instruments    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Total notional amount of outstanding derivatives $ 2,400,000,000 $ 2,400,000,000