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DERIVATIVE FINANCIAL INSTRUMENTS Narrative (Details) - Foreign Currency Forward Contracts Not Designated as Hedges [Member] - USD ($)
$ in Billions
Feb. 28, 2021
May 31, 2020
Forward contracts held to purchase U.S. Dollars [Member]    
Foreign Currency Forward Contracts Not Designated as Hedges (Narrative) [Abstract]    
Notional amounts of forward contracts $ 4.2 $ 4.2
Forward contracts held to sell U.S. Dollars [Member]    
Foreign Currency Forward Contracts Not Designated as Hedges (Narrative) [Abstract]    
Notional amounts of forward contracts $ 4.4 $ 3.9