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Investments (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 03, 2012	Jan. 28, 2011	Jan. 29, 2010
Schedule of Available-for-sale Securities
Other than temporary impairment recognized in interest and other, net	$ 39
Debt securities contractual maturity period	three years or less
Gross realized gains recognized in interest and other, net	49	7	6
Gross realized losses recognized in interest and other, net	$ 41	$ 1	$ 4

The amount of other than temporary impairment losses on investments in debt and equity securities categorized as Available-for-sale which have been recognized in earnings during the period. Such impairment losses consist of other than temporary impairments (OTTI) on equity securities, credit losses on investments in debt securities, and when the entity intends to sell an impaired debt security or it is more likely than not that the entity will be required to sell the impaired debt security before recovery of its amortized cost basis.

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