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Share-Based Compensation (Schedule Of Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2012 years
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding at beginning of year, Shares	8,330,683
Awards outstanding at beginning of year, Weighted Average Exercise Price	$ 24.31
Granted, Shares	100,000
Granted, Weighted Average Exercise Price	$ 36.07
Exercised, Shares	(1,912,967)
Exercised, Weighted Average Exercise Price	$ 14.17
Forfeited or Expired, Shares	(487,066)
Forfeited or Expired, Weighted Average Exercise Price	$ 35.01
Awards outstanding at end of year, Shares	6,030,650
Awards outstanding at end of year, Weighted Average Exercise Price	$ 26.86
Awards outstanding at end of year, Weighted Average Remaining Contractual Term (years)	3.5
Awards outstanding at end of year, Aggregate Intrinsic Value	$ 23,918
Awards outstanding expected to vest, Shares	5,980,827
Awards outstanding expected to vest, Weighted Average Exercise Price	$ 26.86
Awards outstanding expected to vest, Weighted Average Remaining Contractual Term (years)	3.5
Awards outstanding expected to vest, Aggregate Intrinsic Value	23,344
Awards exercisable at end of year, Shares	5,140,725
Awards exercisable at end of year, Weighted Average Exercise Price	$ 25.63
Awards exercisable at end of year, Weighted Average Remaining Contractual Term (years)	3.3
Awards exercisable at end of year, Aggregate Intrinsic Value	23,377
Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards outstanding at beginning of year, Shares	488,800
Awards outstanding at beginning of year, Weighted Average Exercise Price	$ 32.84
Granted, Shares	208,500
Granted, Weighted Average Exercise Price	$ 26.89
Exercised, Shares
Exercised, Weighted Average Exercise Price
Forfeited or Expired, Shares	(46,500)
Forfeited or Expired, Weighted Average Exercise Price	$ 32.80
Awards outstanding at end of year, Shares	650,800
Awards outstanding at end of year, Weighted Average Exercise Price	$ 30.91
Awards outstanding at end of year, Weighted Average Remaining Contractual Term (years)	7.0
Awards outstanding expected to vest, Shares	618,260
Awards outstanding expected to vest, Weighted Average Exercise Price	$ 30.91
Awards outstanding expected to vest, Weighted Average Remaining Contractual Term (years)	7.0
Awards exercisable at end of year, Shares
Awards exercisable at end of year, Weighted Average Exercise Price
Awards exercisable at end of year, Weighted Average Remaining Contractual Term (years)
Awards exercisable at end of year, Aggregate Intrinsic Value
Weighted average grant date fair value-per share	$ 9.50

X

- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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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 vested portions of options outstanding and currently exercisable under the stock option plan.

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The weighted average period between the balance sheet date and expiration for all vested portions of options outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.

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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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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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