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Subsidiary Guarantors - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Jul. 29, 2012	Jan. 29, 2012	Jan. 30, 2011
Debt Instrument [Line Items]
Senior Subordinated Notes, Interest rate	13.50%
Note issued, net of discount	$ 5,765	$ 5,380	$ 5,239
Non-Guarantor Subsidiaries
Debt Instrument [Line Items]
Note issued, net of discount	7
13.5% Senior Subordinated Notes due 2015
Debt Instrument [Line Items]
Senior Subordinated Notes, Interest rate		13.50%
13.5% Senior Subordinated Notes due 2015 \| Non-Guarantor Subsidiaries
Debt Instrument [Line Items]
Note issued, principle	374	373
Note issued, net of discount	$ 277	$ 261
Senior Notes
Debt Instrument [Line Items]
Senior Subordinated Notes, Interest rate		12.00%

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). 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.

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