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DERIVATIVES AND RISK MANAGEMENT (Narrative) (Details) - USD ($)
$ in Millions
Feb. 28, 2018
Feb. 28, 2017
Foreign exchange    
Derivative [Line Items]    
Derivative notional amount $ 300.9 $ 256.4
Commodity    
Derivative [Line Items]    
Derivative notional amount $ 55.3 $ 36.3