Shareholders' Equity (Details) - $ / shares	Jan. 24, 2019	Oct. 25, 2018	Jul. 25, 2018	Apr. 25, 2018	Jan. 25, 2018
Class of Stock [Line Items]
Declared quarterly cash dividend		$ 0.26	$ 0.26	$ 0.26	$ 0.22
Common Stock, Special Cash Dividends, Per Share, Declared		$ 0.14
Subsequent Event [Member]
Class of Stock [Line Items]
Declared quarterly cash dividend	$ 0.28
Common Stock, Special Cash Dividends, Per Share, Declared	$ 0.14