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 6 Months Ended
Aug. 02, 2014
Aug. 03, 2013
Aug. 02, 2014
Aug. 03, 2013
Income Tax Contingency [Line Items]        
Income tax expense/(benefit) $ (4,000,000) $ (18,000,000) $ 4,000,000 $ (217,000,000)
Effective tax rate (2.30%) (3.00%) 0.80% (18.90%)
Increase to tax valuation allowance for deferred tax assets 28,000,000   148,000,000  
Valuation allowance 452,000,000   452,000,000  
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 second quarter of 2014, 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 (NOL) carryforwards.  
Income tax expense (benefit), tax allocation (7,000,000)   (13,000,000)  
Net operating loss carryforwards 2,500,000,000   2,500,000,000  
Other comprehensive income [Member]
       
Income Tax Contingency [Line Items]        
Income tax expense (benefit), tax allocation 7,000,000   13,000,000  
Income from operations [Member]
       
Income Tax Contingency [Line Items]        
Income tax expense (benefit), tax allocation (7,000,000)   (13,000,000)  
Federal audit adjustment [Member]
       
Income Tax Contingency [Line Items]        
State and foreign tax expenses     12,000,000  
State and foreign [Member]
       
Income Tax Contingency [Line Items]        
State and foreign tax expenses 3,000,000   5,000,000  
Amortization of certain indefinite lived intangible assets [Member]
       
Income Tax Contingency [Line Items]        
State and foreign tax expenses 2,000,000   4,000,000  
State audit settlement [Member]
       
Income Tax Contingency [Line Items]        
State and foreign tax expenses (2,000,000)   (4,000,000)  
Federal [Member]
       
Income Tax Contingency [Line Items]        
Tax credit carryforwards 45,000,000   45,000,000  
Federal tax authority [Member]
       
Income Tax Contingency [Line Items]        
Valuation allowance 307,000,000   307,000,000  
Net deferred tax asset, NOL and tax credit carryforwards 550,000,000   550,000,000  
State Tax Authority [Member]
       
Income Tax Contingency [Line Items]        
Valuation allowance 145,000,000   145,000,000  
Net deferred tax asset, NOL carryforwards $ 31,000,000   $ 31,000,000