Shareholders' Equity (Details) - $ / shares	Oct. 27, 2016	Jul. 28, 2016	Apr. 27, 2016	Jan. 28, 2016
Subsequent Event [Line Items]
Declared quarterly cash dividend		$ 0.20	$ 0.19	$ 0.18
Special Dividends Payable, Amount Per Share		$ 0.19	$ 0.18	$ 0.20
Subsequent Event [Member]
Subsequent Event [Line Items]
Declared quarterly cash dividend	$ 0.20
Special Dividends Payable, Amount Per Share	$ 0.19