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Long-term Debt (Issuance And Repurchase Of Notes) (Narrative) (Details)
$ in Millions
3 Months Ended
Feb. 03, 2018
USD ($)
Fixed Rate 8.50% Notes Due June 2019 [Member]  
Extinguishment of Debt, Amount $ 500
Debt Instrument, Repurchase Amount 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
Debt instrument, stated rate 5.25%
Proceeds from Debt, Net of Issuance Costs $ 495
Payments of Debt Issuance Costs $ 5