Share-Based Compensation (Options Granted Under Stock Option Plans) (Details) shares in Thousands	12 Months Ended
	Jan. 28, 2017 $ / shares shares
Number of Shares
Options outstanding at beginning of year | shares	3,694
Granted | shares	500
Exercised | shares	(1,331)
Expired or cancelled | shares	(57)
Options outstanding at end of year | shares	2,806
Options exercisable at end of year | shares	1,790
Options vested and expected to vest | shares	2,780
Weighted-Average Exercise Price
Options outstanding at beginning of year | $ / shares	$ 32.62
Granted | $ / shares	63.60
Exercised | $ / shares	22.12
Expired or cancelled | $ / shares	58.01
Options outstanding at end of year | $ / shares	42.61
Options exercisable at end of year | $ / shares	32.36
Options vested and expected to vest | $ / shares	$ 42.42
Options Outstanding, Weighted-average Remaining Contractual Life	5 years 10 months 24 days
Otions exercisable at end of year, Weighted-average remaining contractual life	4 years 4 months 24 days
Options vested and expected to vest, Weighted-average remaining contractual life	5 years 10 months 24 days