Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011
Fair Value of Financial Instruments [Line Items]
Purchases, sales, issuances, or settlements related to recurring level 3 measurements	$ 0			$ 0
Transfers into or out of level 1	0	0	0	0
Transfers into or out of level 2	0	0	0	0
Money market funds		211,000,000		211,000,000
Goodwill impairment charges	0	0	0	0
Other indefinite-lived intangible assets impairment charges	$ 0	$ 0	$ 0	$ 0

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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+ Details

- Definition

Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References+ Details