INCOME TAXES (Details Textuals) - USD ($) $ in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Jul. 31, 2020	Jan. 31, 2020	Jul. 31, 2019	Jan. 31, 2019	Jul. 31, 2020	Jul. 31, 2019	Jan. 31, 2020
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	13.40%		22.00%		3.50%	17.10%
Tax benefit from stock option exercises recognized in the period		$ 47.6		$ 16.6
Year Over Year, Deferred Tax Expense From Stock Option Exercised							$ 31.0