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Debt And Credit Facilities (Summary Of Long-Term Debt) (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 28, 2017
Jan. 30, 2016
Debt Instrument [Line Items]    
Total secured debt $ 27 $ 35
Total unsecured debt 2,747 2,770
Total long-term debt 2,774 2,805
Less: current portion (11) (10)
Total due beyond one year 2,763 2,795
Mortgage payable, 7.68%, due April 2020 [Member]    
Debt Instrument [Line Items]    
Total secured debt $ 24 $ 30
Debt instrument interest rate 7.68% 7.68%
Maturity date April 2020 April 2020
Other secured debt [Member]    
Debt Instrument [Line Items]    
Total secured debt $ 3 $ 5
Senior notes, 6.25%, due January 2018, net of unamortized discount [Member]    
Debt Instrument [Line Items]    
Total unsecured debt $ 650 $ 649
Debt instrument interest rate 6.25% 6.25%
Maturity date January 2018 January 2018
Senior notes, 4.75%, due May 2020, net of unamortized discount [Member]    
Debt Instrument [Line Items]    
Total unsecured debt $ 499 $ 499
Debt instrument interest rate 4.75% 4.75%
Maturity date May 2020 May 2020
Senior notes, 4.00%, due October 2021, net of unamortized discount [Member]    
Debt Instrument [Line Items]    
Total unsecured debt $ 500 $ 500
Debt instrument interest rate 4.00% 4.00%
Maturity date October 2021 October 2021
Senior debentures, 6.95%, due March 2028 [Member]    
Debt Instrument [Line Items]    
Total unsecured debt $ 300 $ 300
Debt instrument interest rate 6.95% 6.95%
Maturity date March 2028 March 2028
Senior notes, 7.00%, due January 2038, net of unamortized discount [Member]    
Debt Instrument [Line Items]    
Total unsecured debt $ 146 $ 146
Debt instrument interest rate 7.00% 7.00%
Maturity date January 2038 January 2038
Senior notes, 5.00%, due January 2044, net of unamortized discount [Member]    
Debt Instrument [Line Items]    
Total unsecured debt $ 602 $ 600
Debt instrument interest rate 5.00% 5.00%
Maturity date January 2044 January 2044
Other unsecured debt [Member]    
Debt Instrument [Line Items]    
Total unsecured debt $ 50 $ 76