Summary of Stock Options Outstanding under All Plans (Detail) (USD $)	12 Months Ended
Feb. 02, 2013
Options Outstanding
Outstanding at beginning of year	5,890,439
Granted	1,863,354
Exercised	(609,093)
Forfeited or expired	(925,306)
Outstanding at end of year	6,219,394
Exercisable at end of year	2,960,238
Weighted-Average Exercise Price
Outstanding at beginning of year	$ 9.29
Granted	$ 9.72
Exercised	$ 6.38
Forfeited or expired	$ 11.51
Outstanding at end of year	$ 9.37
Exercisable at end of year	$ 10.69

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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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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For presentations that combine terminations, 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 or that expired.

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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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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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