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Long-term Debt (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Aug. 04, 2018
Feb. 03, 2018
Feb. 02, 2019
Feb. 03, 2018
Jan. 28, 2017
Debt Exchange, Exchange Premium $ 24        
Interest Paid     $ 380 $ 391 $ 387
Proceeds from Debt, Net of Issuance Costs     0 495 692
Repayments of Long-term Debt     52 540 742
Gain (Loss) on Extinguishment of Debt     $ 0 (45) $ (36)
Debt Exchange, Cash Consideration Paid 52        
Fixed Rate 8.50% Notes Due June 2019 [Member]          
Extinguishment of Debt, Amount   $ 500      
Repayments of Long-term Debt   540      
Gain (Loss) on Extinguishment of Debt   (45)      
Extinguishment of Debt, Gain (Loss), Net of Tax   (29)      
Fixed Rate 5.25% Notes Due February 2028 [Member]          
Debt Instrument, Face Amount   $ 500   $ 500  
Debt Instrument, Interest Rate, Stated Percentage   5.25%   5.25%  
Proceeds from Debt, Net of Issuance Costs   $ 495      
Debt Issuance Costs, Gross   $ 5   $ 5  
With Subsidiary Guarantee [Member] | Fixed Rate 7.00% Notes Due May 2020 [Member]          
Debt Conversion, Original Debt, Amount 62        
With Subsidiary Guarantee [Member] | Fixed Rate 6.625% Notes Due April 2021 [Member]          
Debt Conversion, Original Debt, Amount 220        
With Subsidiary Guarantee [Member] | Fixed Rate 5.625% Notes Due February 2022 [Member]          
Debt Conversion, Original Debt, Amount 44        
With Subsidiary Guarantee [Member] | Fixed Rate 6.694% Notes Due January 2027 [Member]          
Debt Conversion, Converted Instrument, Amount $ 297        
Debt Conversion, Converted Instrument, Rate 6.694%