DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Narrative) (Details)	6 Months Ended
	Jul. 31, 2020
Foreign Exchange Forward and Option | Designated as cash flow hedging instruments
Derivative [Line Items]
Term of derivative contract	12 months
Foreign Exchange Forward | Not Designated as Hedging Instrument
Derivative [Line Items]
Term of derivative contract	3 months
Foreign Exchange Forward | Not Designated as Hedging Instrument | Financing receivables
Derivative [Line Items]
Term of derivative contract	3 years
Interest Rate Swap | Not Designated as Hedging Instrument
Derivative [Line Items]
Term of derivative contract	5 years
Interest Rate Swap | Not Designated as Hedging Instrument | Structured financing debt
Derivative [Line Items]
Term of derivative contract	3 years
Cross Currency Interest Rate Contract | Not Designated as Hedging Instrument
Derivative [Line Items]
Term of derivative contract	5 years