CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividends, per share (in usd per share)	$ 0.32	$ 0.32	$ 0.32	$ 0.32	$ 0.32	$ 0.32