Annual report pursuant to Section 13 and 15(d)

Retirement Plans (Reconciliation Of Benefit Obligations, Plan Assets, And Funded Status Of The Supplementary Retirement Plan) (Details)

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Retirement Plans (Reconciliation Of Benefit Obligations, Plan Assets, And Funded Status Of The Supplementary Retirement Plan) (Details) - Supplemental Employee Retirement Plan - USD ($)
$ in Millions
12 Months Ended
Jan. 28, 2017
Jan. 30, 2016
Jan. 31, 2015
Projected benefit obligation, beginning of year $ 823 $ 920  
Service cost 0 0 $ 0
Interest cost 22 31 33
Actuarial (gain) loss 26 (70)  
Benefits paid (124) (58)  
Projected benefit obligation, end of year 747 823 920
Fair value of plan assets, beginning of year 0 0  
Company contributions 124 58  
Fair value of plan assets, end of year 0 0 $ 0
Funded status at end of year 747 823  
Accounts payable and accrued liabilities (86) (138)  
Defined Benefit Pension Plan, Liabilities, Noncurrent (661) (685)  
Defined Benefit Plan, Amounts Recognized in Balance Sheet (747) (823)  
Net actuarial (gain) loss 248 261  
Prior service credit 8 8  
Total included in accumulated other comprehensive income $ 256 $ 269