Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2019	Jan. 31, 2018
(Parenthetical) [Abstract]
Dividends declared (in dollars per share)	$ 0.10	$ 0.10	$ 0.20	$ 0.20
Dividend equivalents (in dollars per share)	$ 0.10	$ 0.10	$ 0.20	$ 0.20