SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - USEFUL LIVES; IMPAIRMENTS (Details)	12 Months Ended
	Jan. 31, 2019
Goodwill and Intangible Assets [Abstract]
Number of primary approaches to assess fair value	3
Estimated useful lives of finite-lived intangible assets (in years)	10 years
Equipment, Furniture and Other | Minimum
Property, Plant and Equipment
Estimated useful lives, (in years)	3 years
Equipment, Furniture and Other | Maximum
Property, Plant and Equipment
Estimated useful lives, (in years)	7 years
Software | Minimum
Property, Plant and Equipment
Estimated useful lives, (in years)	3 years
Software | Maximum
Property, Plant and Equipment
Estimated useful lives, (in years)	4 years
Buildings | Minimum
Property, Plant and Equipment
Estimated useful lives, (in years)	10 years
Buildings | Maximum
Property, Plant and Equipment
Estimated useful lives, (in years)	25 years