Consolidated Balance Sheets (Unaudited) (Parenthetical) (Unaudited) - $ / shares	Oct. 31, 2019	Jan. 31, 2019
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	67,424,000	67,289,000
Treasury Stock, Common, Shares	31,665,000	31,332,000