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Stock-Based Compensation and Employee Benefit Plans - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Oct. 28, 2012
Oct. 30, 2011
Oct. 28, 2012
Oct. 30, 2011
Jan. 29, 2012
Jan. 30, 2011
Jan. 31, 2010
Feb. 01, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock option, exercise price         $ 6.44 $ 7.69 $ 13.13 $ 13.13
Stock option, outstanding         29,537,000 18,467,000 20,899,000 22,049,000
Stock option, outstanding weighted average remaining life         8 years 7 months 6 days      
Stock option, options exercisable         3,600,000      
Stock option, options exercisable weighted average exercise price         $ 7.78      
Stock option, options exercisable weighted average remaining life         8 years 1 month 6 days      
Option granted, weighted-average fair value         $ 1.99 $ 1.64 $ 1.63  
Stock-based compensation expense $ 3 $ 7 $ 13 $ 16 $ 20 $ 17 $ 18  
Stock options, unamortized compensation expense         32      
Stock options unamortized compensation expense, reorganization period         4 years 9 months 18 days      
Defined contribution plan, annual matching contribution paid         7   3  
Maximum
               
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Defined contribution plan, annual matching contribution paid           1    
Stock Option Exchange Program
               
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock option, exercise price         $ 10.00      
Incremental stock-based compensation charges per year over five years following exchange date         $ 1      
Nonqualified Stock Options
               
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock options, vest rate per year         20.00%      
Stock options, vest rate on third anniversary of the grant         100.00%      
Stock options, expiration period         10 years      
Repriced Options Issued | Stock Option Exchange Program
               
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock option, exercise price         $ 4.15      
New $10.00 Options Issued
               
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock options, expiration period         10 years      
Stock options, vesting period         5 years      
Stock options, vest rate each anniversary of date of exchange         20.00%      
Stock Option
               
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares of common stock that may be issued         30,900,000      
Stock Option | Stock Option Exchange Program | Maximum
               
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares of common stock that may be issued         55,600,000