Annual report pursuant to Section 13 and 15(d)

Postretirement Health Care and Life Insurance Benefits (Reconciliation Of Benefit Obligations, Plan Assets, And Funded Status Of The Postretirement Obligations) (Details)

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Postretirement Health Care and Life Insurance Benefits (Reconciliation Of Benefit Obligations, Plan Assets, And Funded Status Of The Postretirement Obligations) (Details) - Other Postretirement Benefits Plan [Member] - USD ($)
$ in Millions
12 Months Ended
Feb. 03, 2018
Jan. 28, 2017
Jan. 30, 2016
Projected benefit obligation, beginning of year $ 186 $ 212  
Service cost 0 0 $ 0
Interest cost 5 6 8
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment (10) 0  
Actuarial (gain) loss (9) (13)  
Defined Benefit Plan, Benefit Obligation, Prescription Drug Subsidy Receipt 1 1  
Defined Benefit Plan, Benefit Obligation, Benefits Paid (17) (20)  
Projected benefit obligation, end of year 156 186 212
Fair value of plan assets, beginning of year 0 0  
Company contributions 17 20  
Fair value of plan assets, end of year 0 0 $ 0
Funded status at end of year 156 186  
Accounts payable and accrued liabilities (17) (18)  
Other liabilities (139) (168)  
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position (156) (186)  
Net actuarial (gain) loss (35) (31)  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax (10) 0  
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax (45) $ (31)  
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year $ 6