Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Details)

v3.7.0.1
Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 29, 2017
Jul. 30, 2016
Jul. 29, 2017
Jul. 30, 2016
Income Tax Contingency [Line Items]        
Income tax expense/(benefit) $ 1 $ 5 $ (11) $ 4
Increase to tax valuation allowance for deferred tax assets $ 16   $ 80  
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 periodic assessment, our estimate of the realization of deferred tax assets is solely based 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 NOL and tax credit carryforwards. Accordingly, in the second quarter and first six months of 2017, the valuation allowance was increased by $16 million and $80 million, respectively, to offset the net deferred tax assets created in the quarter relating primarily to the increase in NOL carryforwards.  
Other Comprehensive Income Tax Benefit     $ 16  
State Audit Settlement 1   2  
Net operating loss carryforwards $ 2,200   $ 2,200  
State and foreign [Member]        
Income Tax Contingency [Line Items]        
State and foreign tax expenses (4)   (7)  
Amortization of certain indefinite lived intangible assets [Member]        
Income Tax Contingency [Line Items]        
State and foreign tax expenses (2)   (4)  
Net tax benefit to adjust the valuation allowance [Member]        
Income Tax Contingency [Line Items]        
State and foreign tax expenses (4)   (4)  
Federal [Member]        
Income Tax Contingency [Line Items]        
Tax credit carryforwards 62   62  
Federal tax authority [Member]        
Income Tax Contingency [Line Items]        
Valuation allowance 826   826  
State Tax Authority [Member]        
Income Tax Contingency [Line Items]        
Valuation allowance $ 247   $ 247