Share-Based Compensation (Summary of Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended
Apr. 30, 2011	May 01, 2010
Share-Based Compensation
Balance at beginning of year, Shares	17,869	19,848
Granted, Shares	749	458
Exercised, Shares	(286)	(872)
Forfeited/expired, Shares	(482)	(139)
Balance at end of quarter, Shares	17,850	19,295
Balance at beginning of year, Weighted Average Exercise Price	$ 53.17	$ 52.10
Granted, Weighted Average Exercise Price	$ 52.78	$ 55.66
Exercised, Weighted Average Exercise Price	$ 45.05	$ 36.27
Forfeited/expired, Weighted Average Exercise Price	$ 63.77	$ 54.06
Balance at end of quarter, Weighted Average Exercise Price	$ 53.00	$ 52.89

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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.

+ References

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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.

+ References

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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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- Definition

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

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