Consolidated Statements of Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jan. 26, 2019	Jan. 27, 2018	Jan. 26, 2019	Jan. 27, 2018
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (in dollars per share)	$ 0.33	$ 0.29	$ 0.66	$ 0.58