Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Details)

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Income Taxes (Narrative) (Details) (USD $)
3 Months Ended 9 Months Ended
Nov. 02, 2013
Oct. 27, 2012
Nov. 02, 2013
Oct. 27, 2012
Effective Income Tax Rate, Continuing Operations (2.20%) (41.70%) (13.80%) (41.00%)
Valuation Allowance, Deferred Tax Asset, Change in Amount $ 184,000,000   $ 416,000,000  
Valuation Allowance, Methodologies and Assumptions     In assessing the need for the valuation allowance, we considered both positive and negative evidence related to the likelihood of realization of the deferred tax assets. As a result of our assessment, we concluded that, beginning in the second quarter of 2013, our estimate of the realization of deferred tax assets would be based solely on the future reversals of existing taxable temporary differences and tax planning strategies that we would make use of to accelerate taxable income to utilize expiring carryforwards. Accordingly, in the third quarter of 2013, the valuation allowance was increased to offset the net deferred tax assets created in the quarter relating primarily to the increase in net operating loss carryforwards.  
Income tax benefit 11,000,000 88,000,000 228,000,000 301,000,000
Income tax expense (benefit), tax allocation (16,000,000)      
Operating Loss Carryforwards 2,500,000,000   2,500,000,000  
Valuation allowance 482,000,000   482,000,000  
Domestic Tax Authority [Member]
       
Valuation Allowance, Deferred Tax Asset, Change in Amount 154,000,000      
Net operating loss carryforward 527,000,000   527,000,000  
Valuation allowance 337,000,000   337,000,000  
State and Local Jurisdiction [Member]
       
Valuation Allowance, Deferred Tax Asset, Change in Amount 30,000,000      
Net operating loss carryforward 50,000,000   50,000,000  
Valuation allowance 145,000,000   145,000,000  
Operating Loss Carryforward 2013 [Member]
       
Operating Loss Carryforwards, Expiration Date     Jan. 28, 2033  
Operating Loss Carryforward 2012 [Member]
       
Operating Loss Carryforwards, Expiration Date     Jan. 29, 2032  
State and Foreign [Member]
       
Other Tax Expense (Benefit) 3,000,000      
Amortization Of Certain Indefinite-Lived Intangible Assets [Member]
       
Other Tax Expense (Benefit) $ 2,000,000