Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative) (Details)

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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jan. 27, 2014
Feb. 02, 2019
Feb. 01, 2020
Feb. 02, 2019
Feb. 03, 2018
Operating Loss Carryforwards [Line Items]          
Net tax benefit recorded in connection with U. S. Tax Cuts and Jobs Act   $ 75      
Document Period End Date     Feb. 01, 2020    
Valuation allowance   802 $ 869 $ 802  
Net tax expense (benefit)     3 (16) $ (126)
Federal unused interest deductions that do not expire subject to interest limitation     341    
Operating loss carryforwards and tax credits, potential offset to future ordinary taxable income     710    
Amended rights agreement, stockholder ownership percentage, maximum 4.90%        
Amended rights agreement, Minimum stock ownership percentage by which stockholders are prevented from acquiring additional shares 4.90%        
Amount of unrecognized tax benefits that would impact effective tax rate if recognized     33    
Benefit of federal tax deduction of state taxes     7 7 7
Accrued interest and penalties for unrecognized tax benefits   $ 1 2 $ 1 $ 1
Interest expense disallowed     119    
Deferred Tax Assets, Interest Expense Limitation on Which a Full Valuation Allowance Was Recorded     35    
Federal [Member]          
Operating Loss Carryforwards [Line Items]          
Net operating loss carryforward     2,100    
Tax credit carryforwards     $ 76