Stock-Based Compensation (Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Apr. 30, 2011	May 01, 2010
Stock-Based Compensation
Outstanding at January 29, 2011	1,609
Number of shares granted
Number of shares exercised	(171)
Number of shares forfeited	(2)
Outstanding at April 30, 2011, all vested	1,436
Weighted average exercise price for stock options outstanding, at January 29, 2011	$ 25.53
Weighted average exercise price for stock options granted
Weighted average exercise price for stock options exercised	$ 22.66
Weighted average exercise price for stock options forfeited	$ 19.54
Weighted average exercise price for stock options outstanding, at April 30, 2011	$ 25.88
Weighted average remaining contractual term for stock options outstanding	3.34
Aggregate intrinsic value for stock options outstanding	$ 68,658

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The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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The weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period.

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Net number of share options (or share units) granted during the period.

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The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period.

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options outstanding under the plan as of the balance sheet date.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

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Number of share options (or share units) exercised during the current period.

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