v3.26.1
RISK MANAGEMENT AND DERIVATIVES - Additional Information (Details) - USD ($)
 12 Months Ended
May 31, 2026
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 $ 149,000,000  
Maximum term over which the company hedges exposures to the variability of cash flows for its forecasted transactions (in months) 35 months  
Derivatives not designated as hedging instruments | Not designated as derivative instrument    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Total notional amount of outstanding derivatives $ 5,000,000,000.0 $ 4,000,000,000.0
Derivatives designated as cash flow hedges    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Additional period for forecasted transaction expected to occur 2 months  
Percentage of anticipated exposures hedged (percent) 100.00%  
Derivatives designated as cash flow hedges | Derivatives designated as hedging instruments    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Total notional amount of outstanding derivatives $ 16,400,000,000 18,400,000,000
Derivatives designated as fair value hedges | Derivatives 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
Minimum    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Credit risk related contingent features collateral threshold $ 50,000,000  
Minimum | Derivatives designated as cash flow hedges    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Typical time period that anticipated exposures are hedged against (in months) 12 months  
Maximum | Derivatives designated as cash flow hedges    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Typical time period that anticipated exposures are hedged against (in months) 24 months