Share-Based Compensation (Options Granted Under Stock Option Plans) (Details)	12 Months Ended
	Jan. 30, 2021 $ / shares shares
Number of Shares
Options outstanding at beginning of year	2,881,000
Granted	1,069,000
Exercised	(165,000)
Expired or cancelled	(245,000)
Options outstanding at end of period	3,540,000
Options exercisable at end of period	2,403,000
Options available for future grant at end of period	7,053,613
Weighted-Average Exercise Price
Options outstanding at beginning of year | $ / shares	$ 54.21
Granted | $ / shares	21.61
Exercised | $ / shares	23.36
Expired or cancelled | $ / shares	34.47
Options outstanding at end of period | $ / shares	47.17
Options exercisable at end of period | $ / shares	$ 55.81
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 2 months 12 days