Fair Value Measurements and Concentrations of Credit Risk (Estimated Fair Value Of Company Long Term Debt) (Details) (USD $) In Millions, unless otherwise specified	Jan. 28, 2012	Jan. 29, 2011
Notional Amount
Long-term debt	$ 6,404	$ 6,702
Carrying Amount
Long-term debt	6,620	6,941
Fair Value
Long-term debt	$ 7,343	$ 6,969

- Definition

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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