Annual report pursuant to Section 13 and 15(d)

Retirement Benefit Plans (Accumulated Other Comprehensive (Loss)/Income) (Details)

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Retirement Benefit Plans (Accumulated Other Comprehensive (Loss)/Income) (Details) - USD ($)
$ in Millions
Feb. 01, 2020
Feb. 02, 2019
Supplemental Employee Retirement Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Net loss/(gain) $ 12 $ 9
Prior service cost/(credit) (2) (3)
Defined Benefit Plan, Accumulated Other Comprehensive Income, before Tax, Total 10 6
Pension Plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Net loss/(gain) 184 129
Prior service cost/(credit) 23 30
Defined Benefit Plan, Accumulated Other Comprehensive Income, before Tax, Total 207 [1] $ 159
Defined Benefit Plan, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year $ 6  
[1]
In 2020, approximately $6 million for the Primary Pension Plan is expected to be amortized from Accumulated other comprehensive income/(loss) and into the Consolidated Statement of Operations.