Share-based Compensation (Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Feb. 02, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding as of Beginning of Period, Number of Shares | shares	4,472
Granted, Number of Shares | shares	1,438
Exercised, Number of Shares | shares	(84)
Cancelled, Number of Shares | shares	(534)
Outstanding as of End of Period, Number of Shares | shares	5,292
Vested and Expected to Vest as of End of Period, Number of Shares | shares	5,124	[1]
Options Exercisable as of End of Period, Number of Shares | shares	2,759
Outstanding as of Beginning of Period, Weighted Average Option Price Per Share | $ / shares	$ 57.03
Granted, Weighted Average Option Price Per Share | $ / shares	39.06
Exercised, Weighted Average Option Price Per Share | $ / shares	14.52
Cancelled, Weighted Average Option Price Per Share | $ / shares	53.72
Outstanding as of End of Period, Weighted Average Option Price Per Share | $ / shares	53.14
Vested and Expected to Vest as of End of Period, Weighted Average Option Price Per Share | $ / shares	53.44	[1]
Options Exercisable as of End of Period, Weighted Average Options Price Per Share | $ / shares	$ 55.11
Outstanding as of End of Period, Weighted Average Remaining Contractual Life	6 years 176 days
Vested and Expected to Vest as of End of Period, Weighted Average Remaining Contractual Life	6 years 147 days	[1]
Options Exercisable as of End of Period, Weighted Average Remaining Contractual Life	4 years 278 days
Outstanding as of End of Support, Aggregate Intrinsic Value | $	$ 3,384
Vested and Expected to Vest as of End of Period, Aggregate Intrinsic Value | $	3,384	[1]
Options Exercisable as of End of Period, Aggregate Intrinsic Value | $	$ 3,384

[1] The number of options expected to vest includes an estimate of expected forfeitures.