Share-Based Compensation (Options Granted Under Stock Option Plans) (Details) shares in Thousands	6 Months Ended
	Jul. 30, 2016 $ / shares shares
Number of Shares
Options outstanding at beginning of year	3,694
Granted	482
Exercised	(669)
Expired or cancelled	(54)
Options outstanding at end of period	3,453
Options exercisable at end of period	2,420
Options vested and expected to vest at end of period	3,413
Options available for future grant at end of period	12,006
Weighted-Average Exercise Price
Options outstanding at beginning of year | $ / shares	$ 32.62
Granted | $ / shares	63.47
Exercised | $ / shares	21.56
Expired or cancelled | $ / shares	59.03
Options outstanding at end of period | $ / shares	38.65
Options exercisable at end of period | $ / shares	29.34
Options vested and expected to vest at end of period | $ / shares	$ 38.38
Options outstanding, Weighted-average Remaining Contractual Life	5 years 8 months 12 days
Options exercisable at end of period, Weighted-average remaining contractual life	4 years 3 months 18 days
Options vested and expected to vest, Weighted-average remaining contractual life	5 years 7 months 6 days