Employee Stock Plans (Stock Options) (Details) - Stock Options [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 28, 2018	Jan. 29, 2017	Jan. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 20,000	$ 26,000	$ 26,000
Intrinsic value of option exercises in period	$ 223,000	$ 140,000	$ 206,000
Stock options exercisable	3,757
Intrinsic value of options outstanding	$ 895
Intrinsic value of options exercisable	$ 575
Weighted average remaining life of stock options outstanding	6 years
Weighted average remaining life of stock options exercisable	4 years
Weighted average exercise price of options exercisable	$ 54.13
Stock options outstanding:
Number of shares, beginning valance	8,720
Granted	648
Exercised	(2,029)
Forfeited	(143)
Number of shares, ending balance	7,196	8,720
Weighted Average Exercise Price, Beginning Balance	$ 70.69
Weighted Average Exercise Price, Granted	148.04
Weighted Average Exercise Price, Exercised	48.64
Weighted Average Exercise Price, Forfeited	122.43
Weighted Average Exercise Price, Ending Balance	$ 82.85	$ 70.69