Consolidated Balance Sheets (Parenthetical) - $ / shares	Oct. 31, 2019	Jul. 31, 2019
Statement of Financial Position [Abstract]
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	65,396,531	65,189,907
Treasury, shares (in shares)	10,197,775	10,126,434