Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements and Concentrations of Credit Risk (Estimated Fair Value Of Company Long Term Debt) (Details)

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Fair Value Measurements and Concentrations of Credit Risk (Estimated Fair Value Of Company Long Term Debt) (Details) - USD ($)
$ in Millions
Jan. 28, 2017
Jan. 30, 2016
Long-term debt $ 6,438 $ 6,756
Notional Amount    
Long-term debt 6,459 6,871
Carrying Amount    
Long-term debt $ 6,535 $ 6,966