Share-Based Compensation (Options Granted Under Stock Option Plans) (Details) shares in Thousands	6 Months Ended
	Aug. 01, 2020 $ / shares shares
Number of Shares
Options outstanding at beginning of year	2,881
Granted	1,069
Exercised	(4)
Expired or cancelled	(57)
Options outstanding at end of period	3,889
Options exercisable at end of period	2,473
Options available for future grant at end of period	5,655
Weighted-Average Exercise Price
Options outstanding at beginning of year | $ / shares	$ 54.21
Granted | $ / shares	21.61
Exercised | $ / shares	15.10
Expired or cancelled | $ / shares	48.53
Options outstanding at end of period | $ / shares	45.37
Options exercisable at end of period | $ / shares	$ 54.67
Options outstanding, weighted-average remaining contractual life	6 years 4 months 24 days
Options exercisable at end of period, Weighted-average remaining contractual life	4 years 9 months 18 days