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RETIREMENT PLANS - Additional Information (Details) - USD ($)
 12 Months Ended
May 31, 2026
May 31, 2025
May 31, 2024
May 31, 2023
May 31, 2022
Defined Benefit Plan Disclosure [Line Items]          
U.S. pension plan actual rate of return on assets   6.50% 6.80% (2.70%)  
Weighted average discount rate percent all pension postretirement plans   5.87% 5.53% 5.17% 4.21%
Pension plan, service period   1 year      
Actual rate of return on plan assets for the 15-year period   6.90%      
Amortization of prior service cost in our U.S. pension plans, before tax, after Tax   $ 5,000,000 $ 8,000,000 $ 10,000,000  
Defined benefit plan health care cost trend rate assumed for next fiscal year   6.90%      
Defined benefit plan ultimate health care cost trend rate   4.00%      
Future Plan Structure | Maximum          
Defined Benefit Plan Disclosure [Line Items]          
Company matching contributions to eligible employees   8.00%     8.00%
Current Plan Structure | Maximum          
Defined Benefit Plan Disclosure [Line Items]          
Company matching contributions to eligible employees   3.50%      
U.S. Pension Plans | Pension Plan          
Defined Benefit Plan Disclosure [Line Items]          
Expected long-term rate of return on assets   6.75% 6.50% 6.50%  
Required contributions   $ 0 $ 0    
Voluntary contributions   800,000,000 800,000,000    
Amortization of prior service cost in our U.S. pension plans, before tax   8,000,000 7,000,000    
Amortization of prior service cost in our U.S. pension plans, before tax, after Tax   $ 6,000,000 $ 6,000,000    
U.S. Pension Plans | Pension Plan | Forecast          
Defined Benefit Plan Disclosure [Line Items]          
Required contributions $ 0        
Voluntary contributions $ 600,000,000